CN101771465B - Protection switching method, device and system of multi-service transport network - Google Patents
Protection switching method, device and system of multi-service transport network Download PDFInfo
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Abstract
The invention discloses protection switching method, device and system of a multi-service transport network. The method comprises the steps of: selecting upper wavelength channels located in two different transmission directions of different optical fibers as a protection group, wherein the wavelength channels on two different transmission directions provide protection bandwidth to each other; distributing the bandwidth of all T-CONT frames in a working area of TC frames of the wavelength channels in two different transmission directions according to the bandwidth requirement of data to be transmitted of the wavelength channels in two different transmission directions; carrying the bandwidth distributing information of all T-CONT frames in the working area of TC frames in two different transmission directions during TC frame transmission in each transmission direction; when the line is in the normal state, a node only processing data in the T-CONT frame of the node in the working area of the TC frame in a reception direction by a node; and when a fault occurs to the line, carrying out protection switching by the node. The invention can realize line protection in a bidirectional multi-service transmission looped network.
Description
Technical field
The present invention relates to data communication technology, be specifically related to a kind of protection reverse method, equipment and system of multi-service transmitting network.
Background technology
Rise and PON (Passive Optical Network along with new applications such as IPTV, EPON) use of technology, requirement realizes the unified transmission of multiple business in transmitting network, such as real time business such as voice, the non-real-time service of Bandwidth guaranteed such as video, online game and other non-real-time service as network browsing etc.Because the impossible unconfined increase of the bandwidth of communication network, transfer of data not only needs bearing multiple service, and need reasonable distribution channel width, change with the bandwidth demand that adapts to different kinds of business, and provide different quality of service guarantees for different kinds of business.
The present patent application people has proposed a kind of multi-service transmitting network network framework in the patent application of having submitted to.As shown in Figure 1, be the network architecture schematic diagram of this multi-service transmitting network:
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 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., dissimilar transmission container (T-CONT) frame of GEM frame composition with a plurality of expansions adds that path overhead consists of channel layer, can realize end to end alarm and conveying function monitoring to channel layer.All T-CONT frames form transmission convergence layer (TC) frame, add physical layer overhead, comprise frame head synchronously, the fields such as administration overhead and bandwidth map, to make things convenient in the network main frame to communication and the management of each node, the convenient distribution time slot of adjusting each T-CONT frame is realized the dynamic bandwidth adjustment.
The service port of this network comprises traditional TDM (Time Division Multiplex, time division multiplexing) professional, SDH (Synchronous Digital Hierarchy, synchronous digital hierarchy)/SONET (Synchronous Optical Network, Synchronous Optical Network)/ATM (Asynchronous TransferMode, asynchronous transfer mode) business, and Ethernet data is professional, and data service is optional through delivering to service adapting layer after two layers of exchange.Except these common form of services, be used for now technology T-MPLS (the Transport Multi-protocol Label Switching that grouping transmits main flow, the multi protocol label exchange is transmitted) and PBB-TE (Provider Backbone Bridge-Traffic Engineering, the provider backbone bridging transmission), also can be used as the service port of this network.In order to support to dock the docking of Access Layer optical fiber access technology, the GEM frame of GPON system also can be used as the service port of this network architecture.
A basic demand of this multi-service transmitting network is exactly to guarantee professional availability, therefore need to provide protection mechanism to network, is recovered by a backup path so that the business in an out of order path can change its course.
Article one, specific business is called passage from end-to-end path by multi-service transmitting network.In SDH, a passage is by a virtual container (VC) and path overhead (POH) expression related with it, in case after setting up, the size and location of passage can not change.
Transmission container in the multi-service transmitting network (T-CONT) frame is corresponding with the VC passage of SDH, is called the transmission channel of multi-service transmitting network, i.e. the T-CONT passage.Because position and the bandwidth length of T-CONT passage all may change, existingly can not be applicable to multi-service transmitting network based on the fixing route protection mechanism of slot transmission technology (such as SDH).
Summary of the invention
The embodiment of the invention provides a kind of protection reverse method, equipment and system of multi-service transmitting network, transmits the route protection of looped network to realize simply and effectively two-way multi-service.
The protection reverse method of a kind of multi-service transmitting network that the embodiment of the invention provides comprises:
Select to be positioned at the upper wavelength channel of two different transmission directions of different fiber as protection group in multi-service transmitting network, the wavelength channel in described two different transmission directions provides mutually the protection bandwidth;
According to the bandwidth demand of the data to be transmitted of the wavelength channel in described two different transmission directions, distribute in the TC frame of the wavelength channel in described two different transmission directions the bandwidth of all T-CONT frames in the service area;
Carry in the TC frame in described two different transmission directions the bandwidth allocation information of all T-CONT frames in the service area during transmission of TC frame in each transmission direction;
When circuit was normal, on each receive direction, node was only processed the data in the T-CONT frame that belongs to this node in the service area in the TC frame on the described receive direction;
When line fault, node protection is switched, and the T-CONT frame that is subjected to the data communication device of described fault effects to cross rightabout protection zone transmits.
A kind of multi-service transmitting network host node that the embodiment of the invention provides comprises:
The first setting unit is used for arranging protection group, and described protection group is the wavelength channel that is positioned in the multi-service transmitting network in two different transmission directions of different fiber, and the wavelength channel in described two different transmission directions provides mutually the protection bandwidth;
The allocated bandwidth unit is used for the bandwidth demand according to the data to be transmitted in described two different transmission directions, distributes in the TC frame in described two different transmission directions the bandwidth of all T-CONT frames in the service area;
The bandwidth allocation information transmitting element, be used for sending bandwidth allocation information by the TC frame, carry in the TC frame of the wavelength channel in described two different transmission directions the assignment information of the bandwidth of all T-CONT frames in the service area during TC frame transmission of the wavelength channel in each transmission direction.
A kind of multi-service transmitting network node that the embodiment of the invention provides comprises:
Receiving element is used for receiving the TC frame;
Fault detection unit is for detection of line fault;
Data processing unit, be used for detecting circuit when normal at described fault detection unit, process the data in the T-CONT frame that belongs to this node in the service area in the TC frame on the receive direction, the position of T-CONT frame and bandwidth length are disposed by the host node in the multi-service transmitting network in the described service area, and the bandwidth allocation information indication by carrying in the described TC frame;
Switch unit is used for protecting and switching when line fault, crossed in the T-CONT frame of rightabout protection zone by the data communication device of described fault effects and transmits; After line fault is recovered, data are returned to again from the service area transmit.
The protection exchanging system of a kind of multi-service transmitting network that the embodiment of the invention provides comprises:
The multi-service transmitting network host node is used for arranging protection group, and described protection group is the wavelength channel that is positioned in the multi-service transmitting network in two different transmission directions of different fiber, and the wavelength channel in described two different transmission directions provides mutually the protection bandwidth; According to the bandwidth demand of the data to be transmitted in described two different transmission directions, distribute in the TC frame of the wavelength channel in described two different transmission directions the bandwidth of all T-CONT frames in the service area; Send bandwidth allocation information by the TC frame, carry in the TC frame in described two different transmission directions the assignment information of the bandwidth of all T-CONT frames in the service area during TC frame transmission of the wavelength channel in each transmission direction;
The multi-service transmitting network node is used for receiving the TC frame according to the assignment information of described bandwidth, and when circuit is normal, and on each receive direction, node is only processed the data in the T-CONT frame that belongs to this node in the service area in the TC frame on the described receive direction; When line fault, protect and switch, crossed in the T-CONT frame of rightabout protection zone by the data communication device of described fault effects and transmit; After line fault is recovered, data are returned to again from the service area transmit.
Protection reverse method and the system of the multi-service transmitting network that the embodiment of the invention provides, characteristics for transmission channel position and Bandwidth Dynamic variation in the multi-service transmitting network, in multi-service transmitting network, select to be positioned at the wavelength channel of two different transmission directions of different fiber as protection group, wavelength channel in described two different transmission directions provides mutually the protection bandwidth, and the TC frame in described two different transmission directions provides mutually the protection zone; According to the bandwidth demand of the data to be transmitted in described two different transmission directions, distribute in the TC frame in described two different transmission directions the bandwidth of all T-CONT frames in the service area; Carry in the TC frame in described two different transmission directions the assignment information of the bandwidth of all T-CONT frames in the service area during transmission of TC frame in each transmission direction.Like this, when line fault, utilize described protection zone to protect and switch, realize the route protection of two-way multi-service transmitting network.
Description of drawings
Fig. 1 is the network architecture schematic diagram of multi-service transmitting network;
Fig. 2 is the flow chart of the protection reverse method of embodiment of the invention multi-service transmitting network;
Fig. 3 is transmission channel configuration schematic diagram in the embodiment of the invention;
Fig. 4 is at the process chart of line fault posterior nodal point in the embodiment of the invention;
Fig. 5 is the process chart after the circuit fault recovery in the embodiment of the invention;
Fig. 6 utilizes the method for the embodiment of the invention to realize that the two-fibre two-way multi-service transmits the schematic diagram of loop grid protection;
Fig. 7 is the structural representation of embodiment of the invention multi-service transmitting network host node;
Fig. 8 is the structural representation of embodiment of the invention multi-service transmitting network node.
Embodiment
In order to make those skilled in the art person understand better the scheme of the embodiment of the invention, below in conjunction with drawings and embodiments the embodiment of the invention is described in further detail.
In order to express easily, in the following description, the T-CONT frame that the node in the multi-service transmitting network is transmitted and receive data under normal circumstances is called service aisle.
The protection reverse method of embodiment of the invention multi-service transmitting network, characteristics for transmission channel position and Bandwidth Dynamic variation in the multi-service transmitting network, select to be positioned at wavelength channel in two different transmission directions of different fiber as protection group in multi-service transmitting network, the TC frame of the wavelength channel in described two different transmission directions provides mutually the protection zone; According to the bandwidth demand of the data to be transmitted of the wavelength channel in described two different transmission directions, distribute in the TC frame in described two different transmission directions the bandwidth of all T-CONT frames in the service area; Carry in described two different transmission directions in the TC frame bandwidth allocation information of all T-CONT frames in the service area during transmission of TC frame in each transmission direction.Like this, when line fault, utilize described protection zone to protect and switch, thereby realize dynamic transmission channel protection.
As shown in Figure 2, be the flow chart of the protection reverse method of embodiment of the invention multi-service transmitting network:
Transmission for optimization data; can in described two different transmission directions, in the TC frame in the minor axis transmission direction service area be set for outgoing data; distribution T in described service area-CONT frame is as service aisle; and in described two different transmission directions, in the TC frame in the major diameter transmission direction protection zone being set, distribution T in described protection zone-CONT frame is as protection channel.Like this, node just can be with the T-CONT frame of Deta bearer to be sent in the service area when sending data.
The bandwidth length that described protection channel is set equates with the bandwidth length of described service aisle; and position and described service aisle the position skew regular length in the TC at its place frame of described protection channel in the TC at its place frame, described regular length equal the length of the service area in the TC frame at described service aisle place.The original position of described protection channel in the TC at its place frame equals the bandwidth length of the protection zone in the TC frame that the original position of service aisle in the TC at its place frame add the above service aisle place.
Fig. 3 is the service area of TC frame in two transmission directions and the schematic diagram of protection zone:
For convenience of description, will select protection group after, the wavelength channel that passes two different directions of arbitrary node is called: the east orientation wavelength channel and the west to wavelength channel.
As shown in Figure 3; in node i; the service aisle of a T-CONT frame is positioned at the service area of the TC frame that transmits on the east orientation wavelength channel; the original position that the original position of protection channel in the TC frame that transmit to wavelength channel in the west of configuration equals service aisle adds the length L 1 (unit is byte) of the TC frame service area that the east orientation wavelength channel transmits, and the length of protection channel is consistent with its corresponding service aisle.
Like this, receive in the TC frame on the direction in the service area when node and can calculate position and bandwidth length in the protection channel TC frame in the opposite direction after the bandwidth allocation information of all T-CONT frames.Thereby can make position and bandwidth length and the synchronously renewal of service aisle maintenance of protection channel, need not manual change, can realize the automatic configuration of protection channel.Like this, when the professional required Bandwidth Dynamic in the different transmission directions changes and during required bandwidth asymmetric, can automatically finish the division of service area and protection zone in the TC frame.
Utilize the protection reverse method of this multi-service transmitting network, can effectively realize the route protection of two-way multi-service transmitting network.Route protection problem when the professional required Bandwidth Dynamic variation in the solution multi-service transmitting network in the different transmission directions and required bandwidth asymmetric.
For any one node on the multi-service transmitting network, under non-failure conditions, that is to say when circuit is normal that on each receive direction, node is only processed the data in the T-CONT frame that belongs to this node in the service area in the TC frame on the described receive direction; When line fault, node utilizes described protection zone to protect and switches; After line fault was recovered, node returned to the state before the fault again.
Suppose that node 1 and node 2 are two online nodes of two-way multi-service transfer ring, the line fault between node 1 and the node 2, the below reaches the handling process that line fault is recovered posterior nodal point after line fault is described respectively.
For convenience of description, only show among following Fig. 4 and Fig. 5 one on the direction node 1 and the interaction process flow process of host node, the node 2 on another direction and the interaction process flow process of host node are similarly.
As shown in Figure 4, be at the process chart of line fault posterior nodal point in the embodiment of the invention.
401. after node 1 detects line fault, send signalling trouble to host node;
Such as, can be the TC frame that bandwidth allocation information is not carried in continuous transmission; Perhaps be sent in continuously the TC frame that carries announcement information in the expense passage;
402. host node is closed dynamic bandwidth allocation function after receiving described signalling trouble;
403. host node sends bandwidth to node 1 and forces update notification;
It can be the TC frame of particular number that described bandwidth is forced update notification, sends such as host node and is numbered 0 TC frame, and write the bandwidth allocation information of current all T-CONT passages that calculate in the bandwidth map territory of TC frame;
404. node 1 upgrades the bandwidth allocation information on this node both direction, and calculates the protection channel position after receiving that described bandwidth is forced update notification;
405. after node 1 bandwidth is upgraded and finished, send the bandwidth renewal to host node and finish notice;
A kind of simple mode is that the expense passage by the TC frame transmits described bandwidth and upgrades and finish notice, that is to say, sends continuously to host node and carries bandwidth in the expense passage and upgrade the TC frame of finishing announcement information;
406. host node sends execute protection to node 1 and switches notice after receiving all that from both direction (node 1 and node 2) notice is finished in the bandwidth renewal;
Described execute protection is switched the TC frame that notice can be particular number, sends such as host node and is numbered 1 TC frame;
407. node 1 is protected and is switched after receiving that described execute protection is switched notice;
Two fine ring switching processes are similar in concrete protection reversed process and the SDH system of prior art, are not described in detail at this;
408. after node 1 protection is switched and finished, send protection to host node and switch and finish notice;
Equally, also can transmit by the expense passage of TC frame described protection switches and finishes notice;
409. host node from both direction (node 1 and node 2) all receive protection switch finish notice after, open dynamic bandwidth allocation function.
As shown in Figure 5, be the process chart after the circuit fault recovery in the embodiment of the invention;
501. node 1 has recovered notice to host node transmitting line fault after detecting the line fault recovery;
Such as, can be the TC frame that bandwidth allocation information is not carried in continuous transmission; Perhaps be sent in continuously the TC frame that carries announcement information in the expense passage;
502. host node is closed dynamic bandwidth allocation function after receiving that described line fault has been recovered notice;
503. host node is waited for the scheduled time, has all received same bandwidth map and has finished the renewal of the bandwidth allocation information of this node to guarantee all nodes;
504. after waiting for the scheduled time, send execution to node 1 and switch the recovery notice;
505. node 1 is switched recovery after receiving that the recovery notice is switched in described execution, returns to the front state of fault;
Two fine ring switching processes are similar in the concrete SDH system of switching recovery process and prior art, are not described in detail at this;
506. after node 1 is finished and switched recovery, switch recovery to the host node transmission and finish notice;
507. host node is opened dynamic bandwidth allocation function after receiving all that from both direction (node 1 and node 2) switching recovery finishes notice.
In order to make those skilled in the art person understand better the scheme of the embodiment of the invention, Fig. 6 shows the method for utilizing the embodiment of the invention and realizes that the two-fibre two-way multi-service transmits the schematic diagram of loop grid protection.
Link to each other by two opposite optical fiber of transmit-receive position between node.Host node is numbered the TC frame, and the TC frame number by host node adds 1, and numbering reaches peaked TC frame, restarts numbering during by host node.
Respectively select a wavelength channel as protection group from the opposite optical fiber of two transmit-receive positions, two wavelength channels in the protection group provide mutually the protection bandwidth.
Host node is collected the bandwidth demand information of the data to be transmitted in the different transmission directions, calculates and distribute the bandwidth of all T-CONT passages in two transmission directions.The position of service aisle and protection channel is configured according to previously described method.The TC frame that transmits on each direction carries the bandwidth allocation information of all T-CONT passages, comprises the bandwidth allocation information of all T-CONT passages of the service area of TC frame on the bandwidth allocation information of all the T-CONT passages in the service area of this TC frame and the respective opposite direction.
When the TC frame of node receipts on a direction, receive the bandwidth allocation information of service area T-CONT passage; then node calculates position and the bandwidth length in the TC frame that protection channel in the opposite direction transmits, and the original position that the original position of protection channel in the TC frame equals service aisle adds the protection zone length of service aisle place TC frame.
Under the non-failure conditions, on each receive direction, belong to the data in the T-CONT passage of this node in node only processes that this side up the service area.
As shown in Figure 6, because line fault, node 1 can not receive the TC frame from interior ring direction, and node 2 can not receive the TC frame from the outer shroud direction, and node 1 and node 2 send signalling trouble to host node.
When host node is in any direction received signalling trouble, represent that namely network breaks down, no longer bandwidth allocation information is recomputated and upgrade, namely close dynamic bandwidth allocation function.
Because node distance from host node in different transmission directions is different, so the time of the same bandwidth map that is issued by host node of receiving from different directions is also different.When breaking down; the bandwidth map that the interior ring of node 1 or node 2 and outer shroud direction receive may be inconsistent; after guaranteeing that protection is switched; the data input and data output mistake does not appear; carry same bandwidth map in the TC frame that each node is received on the looped network before needing to guarantee to switch, and therefrom obtain and upgrade the bandwidth allocation information of the T-CONT passage that belongs to this node.A kind of simple implementation method is before execute protection is switched; host node sends bandwidth and forces update notification; for example host node sends and is numbered 0 TC frame; (also can be other integer of setting), and in the bandwidth map territory of TC frame, write the bandwidth allocation information of current all T-CONT passages that calculate.
After node 1 and node 2 are received and are numbered 0 TC frame, the bandwidth map of carrying according to this TC frame is upgraded the bandwidth allocation information in two transmission directions of this node, if extra traffic is arranged then stop to send, the TC frame that sends from node 1 and node 2 carries the bandwidth map that is numbered 0 the TC frame.
The node that does not detect fault normally upgrades the bandwidth allocation information of this node after receiving and being numbered 0 TC frame, if extra traffic is arranged then stop to send, only transmits and receive data in the service area.
After the bandwidth allocation information in node 1 and two transmission directions of node 2 complete nodes of renewal, in the fault-free transmission direction, send the renewal of pressure bandwidth to host node and finish notice.
Host node illustrates that each node has received same bandwidth map and finished renewal after receiving all in two transmission directions that the notice of finishing is upgraded in pressure, this moment, host node trigger protection turning protocol notified malfunctioning node to carry out bridge joint and switch.
After protection was switched and finished, node 1 copied the bandwidth map of the TC frame that the bandwidth map in the TC frame that receives on the outer shroud direction sends in interior ring direction as node 1, and the service area data Replica of outer shroud TC frame is to the protection zone transmission of interior ring TC frame; Equally, node 2 copies the bandwidth map of the TC frame that the bandwidth map in the TC frame that receives on the interior ring direction sends in the outer shroud direction as node 2, and the service area data Replica of interior ring TC frame transmits to the protection zone of outer shroud TC frame.Node 1 and node 2 with switch front the same, at the service area of different transmission directions transceiving data.
The node that does not detect fault is switched in protection and is in pass-through state after finishing, and does not namely process the data of protection zone in the TC frame, normally at the service area of TC frame transceiving data.
For host node, protection switch finish after, node 1 and node 2 send protection to host node and switch and finishes notice, host node from both direction all receive described protection switch finish notice after, reopen dynamic bandwidth allocation function.
After node 1 and node 2 detect line fault and recover, the state in the time of need to again switching to fault-free.Detailed process is as follows:
After node detects fault recovery, notify to the fault recovery of host node transmitting line, after host node is notified, close dynamic bandwidth allocation function, and after the scheduled time, send to carry out to switch to the node that detects fault recovery and recover notice, the described scheduled time guarantees that all nodes have received same bandwidth map and finished the renewal of the bandwidth allocation information of this node.Switch recover to finish after, node 1 and node 2 send to switch to host node and recover to finish notice; Host node all receive from the both direction described switch recover to finish notice after, reopen dynamic bandwidth allocation function, return to the state before the fault.
As seen, utilize the method for the embodiment of the invention, can realize simply and effectively the protection of the transmission channel in the multi-service transmitting network, be applicable to the transmission of non-symmetrical service in the multi-service transmitting network.When the professional required Bandwidth Dynamic in the different transmission directions changes and during required bandwidth asymmetric, can automatically finish the configuration of service area and protection zone in the TC frame, maximally utilise line bandwidth and realize route protection.
Need to prove, in the above embodiments, only be illustrated as an example of two-way multi-service transmission looped network example, the method of the embodiment of the invention is not only applicable to transmit looped network by the continuous two-way multi-service of the optical fiber of two debit's opposite directions between this node, and the four fine multi-services that are equally applicable to link to each other by four optical fiber between node transmit looped network.After four fine multi-services transmitted in the looped network, configure protection group, it is similar that the implementation of passage and two-way multi-service transmit looped network, is not described in detail at this.
One of ordinary skill in the art will appreciate that all or part of step that realizes in above-described embodiment method is to come the relevant hardware of instruction 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 multi-service transmitting network host node, as shown in Figure 7, is the structural representation of described multi-service transmitting network host node.
This multi-service transmitting network host node comprises: the first setting unit 701, allocated bandwidth unit 702, bandwidth allocation information transmitting element 703 also can further comprise the second setting unit 704.Wherein:
The first setting unit 701 is used for arranging protection group, and described protection group is the wavelength channel that is positioned in the multi-service transmitting network in two different transmission directions of different fiber, and the wavelength channel in described two different transmission directions provides mutually the protection bandwidth;
Allocated bandwidth unit 702 is used for the bandwidth demand according to the data to be transmitted in described two different transmission directions, distributes in the TC frame of the wavelength channel in described two different transmission directions the bandwidth of all T-CONT frames in the service area;
Bandwidth allocation information transmitting element 703, be used for sending bandwidth allocation information by the TC frame, carry in the TC frame in described two different transmission directions the assignment information of the bandwidth of all T-CONT frames in the service area during TC frame transmission of the wavelength channel in each transmission direction.
The second setting unit 704; be used in the TC frame of outgoing data in the minor axis transmission direction of described two different transmission directions the service area is set; distribution T in described service area-CONT frame is as service aisle; and in the TC frame in the major diameter transmission direction of described two different transmission directions the protection zone being set, distribution T in described protection zone-CONT frame is as protection channel.The bandwidth length of described protection channel equates with the bandwidth length of described service aisle; and position and described service aisle the position skew regular length in the TC at its place frame of described protection channel in the TC at its place frame, described regular length equal the bandwidth length of the service area in the TC frame at service aisle place.
By the second setting unit 704, the further transmission of optimization data.
In this embodiment, can further include: notice receiving element 705, allocated bandwidth control unit 706 and notice transmitting element 707.Wherein:
Notice receiving element 705 is used for receiving signalling trouble; Allocated bandwidth control unit 706 links to each other with allocated bandwidth unit 702, is used for closing dynamic bandwidth allocation function after described notice receiving element 705 is received signalling trouble; Notice transmitting element 707 is used for after described notice receiving element 705 is received signalling trouble, sends bandwidth and forces update notification.
In addition, described notice receiving element 705 also is used for receiving the bandwidth renewal and finishes notice; Described notice transmitting element 707 also is used for sending execute protection and switching notice after described notice receiving element 705 is receiving all in two different transmission directions that notice is finished in described bandwidth renewal.
In addition, described notice receiving element 705 also is used for receiving fault and has recovered notice; Described allocated bandwidth control unit 706 also is used for closing dynamic bandwidth allocation function after described notice receiving element 705 receives that described fault has been recovered notice; Described notice transmitting element 707 also is used for after described notice receiving element 705 receives that described fault has been recovered notice, sends after the wait scheduled time to carry out to switch to recover notice.Described allocated bandwidth control unit 706 also is used for reopening dynamic bandwidth allocation function after described notice receiving element 705 is receiving all in two different transmission directions that switching recovery finishes notice.
Utilize the multi-service transmitting network host node of the embodiment of the invention; can be for the professional required Bandwidth Dynamic variation in the different transmission directions of multi-service transmitting network and the characteristics of required bandwidth asymmetric; realize the configuration of transmission channel, maximum is utilized line bandwidth, realizes route protection.
The embodiment of the invention also provides a kind of multi-service transmitting network node, as shown in Figure 8, is the structural representation of described multi-service transmitting network node.
This multi-service transmitting network node comprises: receiving element 801, fault detection unit 802, data processing unit 803 and switch unit 804.Wherein:
Receiving element 801 is used for receiving the TC frame;
In this embodiment, can further include: message sending unit 805, message sink unit 806 and updating block 807.Wherein:
In addition, described message sending unit 805 also is used for sending the bandwidth renewal to host node and finishing notice after described updating block 807 renewals are finished; Described message sink unit 806, the execute protection that also is used for the transmission of reception host node is switched notice; Described switch unit 804 is protected and is switched after described message sink unit 806 receives that the execute protection of host node transmission is switched notice.Described message sending unit 805 also is used for after described protection switch unit 804 is finished protection and switched, and sends protection to host node and switches and finish notice.
In addition, described message sending unit 805 also is used for sending fault to host node and having recovered notice after described fault detection unit 802 detects the line fault recovery; Described message sink unit 806, the recovery notice is switched in the execution that also is used for the transmission of reception host node; Described switch unit 804, also be used for described message sink unit 806 receive execution that host node sends switch recover notice after, by switching the state that returns to before the fault.
The multi-service transmitting network node of the embodiment of the invention can be according to the configuration of host node to service aisle and protection channel, correct receive data; and after line fault; utilize described protection channel protection to switch, after the circuit fault recovery, switch the state that returns to before the fault by protection.
The embodiment of the invention also provides a kind of protection exchanging system of multi-service transmitting network, comprising: multi-service transmitting network host node and multi-service transmitting network node.Wherein:
Described multi-service transmitting network host node is used for arranging protection group, and described protection group is the wavelength channel that is positioned in the multi-service transmitting network in two different transmission directions of different fiber, and the wavelength channel in described two different transmission directions provides mutually the protection bandwidth; According to the bandwidth demand of the data to be transmitted of the wavelength channel in described two different transmission directions, distribute in the TC frame of the wavelength channel in described two different transmission directions the bandwidth of all T-CONT frames in the service area; Send bandwidth allocation information by the TC frame, carry in the TC frame in described two different transmission directions the assignment information of the bandwidth of all T-CONT frames in the service area during TC frame transmission in each transmission direction;
Described multi-service transmitting network node, be used for receiving the TC frame according to the assignment information of described bandwidth, and when circuit was normal, on each receive direction, node was only processed the data in the T-CONT frame that belongs to this node in the service area in the TC frame on the described receive direction; When line fault, protect and switch, crossed in the T-CONT frame of rightabout protection zone by the data communication device of described fault effects and transmit; After line fault is recovered, data are returned to again from the service area transmit.
The structure of described multi-service transmitting network host node and described multi-service transmitting network node can be with reference to the description of front, in this system, after the configuration of transmission channel and line fault and the fault recovery processing procedure of each node can with reference to the present invention execute the example method in description.
The system of the embodiment of the invention goes for the transmission of non-symmetrical service in the multi-service transmitting network, realizes simply and effectively route protection, and can utilize line bandwidth maximumly.
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 helping to understand method and apparatus of the present invention; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (24)
1. the protection reverse method of a multi-service transmitting network is characterized in that, comprising:
Select to be positioned at wavelength channel in two different transmission directions of different fiber as protection group in multi-service transmitting network, the wavelength channel in described two different transmission directions provides mutually the protection bandwidth;
According to the bandwidth demand of the data to be transmitted of the wavelength channel in described two different transmission directions, distribute that all transmit the bandwidth of container T-CONT frames in the service area in the transmission convergence layer TC frame of the wavelength channel in described two different transmission directions;
Carry in the TC frame in described two different transmission directions the bandwidth allocation information of all T-CONT frames in the service area during transmission of TC frame in each transmission direction;
When circuit was normal, on each receive direction, node was only processed the data in the T-CONT frame that belongs to this node in the service area in the TC frame on the described receive direction;
When line fault, node protection is switched, and the T-CONT frame that is subjected to the data communication device of described fault effects to cross rightabout protection zone transmits.
2. method according to claim 1 is characterized in that, described method also comprises:
For outgoing data arranges the service area in the TC frame in the minor axis transmission direction in described two different transmission directions, distribution T in described service area-CONT frame is as service aisle, and in described two different transmission directions, in the TC frame in the major diameter transmission direction protection zone being set, distribution T in described protection zone-CONT frame is as protection channel;
Send data by described service aisle.
3. method according to claim 2 is characterized in that,
The bandwidth length of described protection channel equates with the bandwidth length of described service aisle; and position and described service aisle the position skew regular length in the TC at its place frame of described protection channel in the TC at its place frame, described regular length equal the bandwidth length of the service area in the TC frame at service aisle place.
4. method according to claim 1 is characterized in that, described method also comprises:
Receive in the TC frame on the direction in the service area after the bandwidth allocation information of all T-CONT frames when node, calculate position and bandwidth length in the TC frame of protection channel correspondence in the opposite direction.
5. method according to claim 1 is characterized in that, and is described when line fault, and node utilizes described protection zone to protect to switch to comprise:
After node detects line fault, send signalling trouble to host node;
Described node upgrades the bandwidth allocation information in two different transmission directions of this node, and calculates position and the bandwidth length of protection channel in the TC frame after receiving that the bandwidth of host node transmission is forced update notification;
After renewal was finished, described node sent the bandwidth renewal to host node and finishes notice;
Described node is protected and is switched after receiving that the execute protection of host node transmission is switched notice;
After protection was switched and finished, described node sends to protect to switch to host node finished notice.
6. method according to claim 5 is characterized in that, describedly sends signalling trouble to host node and is specially:
The TC frame of bandwidth allocation information is not carried in transmission continuously; Perhaps
Be sent in continuously the TC frame that carries announcement information in the expense passage.
7. method according to claim 5 is characterized in that, after described host node is received described signalling trouble, sends described bandwidth and forces before the update notification, and described method also comprises:
Close dynamic bandwidth allocation function.
8. method according to claim 5 is characterized in that, described method also comprises:
Described host node sends described execute protection and switches notice after receiving all in two different transmission directions that notice is finished in described bandwidth renewal;
Described host node all receive in two different transmission directions the protection switch finish notice after, reopen dynamic bandwidth allocation function.
9. method according to claim 1 is characterized in that, described method also comprises:
After line fault was recovered, node returned to the state before the fault again; Wherein, the state that again returns to before the fault of described node comprises:
After node detects the line fault recovery, send fault to host node and recovered notice;
Described node is carried out and is switched recovery after receiving that the recovery notice is switched in the execution of described host node transmission, returns to the front state of fault;
Switch recover to finish after, described node sends to switch to host node and recovers to finish notice.
10. method according to claim 9 is characterized in that, described method also comprises:
Described host node is closed dynamic bandwidth allocation function after receiving that described fault has been recovered notice, and the recovery notice is switched in the described execution of transmission after waiting for the scheduled time;
Described host node all receive in two different transmission directions described switch recover to finish notice after, reopen dynamic bandwidth allocation function.
11. to 10 each described methods, it is characterized in that described method also comprises according to claim 1:
After line fault was recovered, node again returned to data from the service area and transmits.
12. a multi-service transmitting network host node is characterized in that, comprising:
The first setting unit is used for arranging protection group, and described protection group is the wavelength channel that is positioned in the multi-service transmitting network in two different transmission directions of different fiber, and the wavelength channel in described two different transmission directions provides mutually the protection bandwidth;
The allocated bandwidth unit, link to each other with described the first setting unit, be used for the bandwidth demand according to the data to be transmitted in described two different transmission directions, distribute in the transmission convergence layer TC frame in described two different transmission directions the bandwidth of all the transmission container T-CONT frames service area in;
The bandwidth allocation information transmitting element, link to each other with described allocated bandwidth unit, be used for sending bandwidth allocation information by the TC frame, carry in the TC frame of the wavelength channel in described two different transmission directions the assignment information of the bandwidth of all T-CONT frames in the service area during TC frame transmission of the wavelength channel in each transmission direction.
13. multi-service transmitting network host node according to claim 12 is characterized in that, also comprises:
The second setting unit; link to each other with described the first setting unit; be used to outgoing data in described two different transmission directions, in the TC frame in the minor axis transmission direction service area to be set; distribution T in described service area-CONT frame is as service aisle; and in described two different transmission directions, in the TC frame in the major diameter transmission direction protection zone being set, distribution T in described protection zone-CONT frame is as protection channel.
14. multi-service transmitting network host node according to claim 13 is characterized in that,
The bandwidth length of described protection channel equates with the bandwidth length of described service aisle; and position and described service aisle the position skew regular length in the TC at its place frame of described protection channel in the TC at its place frame, described regular length equal the bandwidth length of the service area in the TC frame at service aisle place.
15. multi-service transmitting network host node according to claim 13 is characterized in that, also comprises:
The notice receiving element is used for the signalling trouble that receiving node sends;
The allocated bandwidth control unit links to each other with described notice receiving element with described allocated bandwidth unit, is used for closing dynamic bandwidth allocation function after described notice receiving element is received signalling trouble;
The notice transmitting element links to each other with described allocated bandwidth unit, is used for after described notice receiving element is received signalling trouble, sends bandwidth and forces update notification.
16. multi-service transmitting network host node according to claim 15 is characterized in that,
Described notice receiving element also is used for receiving the bandwidth renewal and finishes notice;
Described notice transmitting element also is used for sending execute protection and switching notice after described notice receiving element is receiving all in two different transmission directions that notice is finished in described bandwidth renewal.
17. according to claim 15 or 16 described multi-service transmitting network host nodes, it is characterized in that,
Described notice receiving element also is used for receiving fault and has recovered notice;
Described allocated bandwidth control unit also is used for closing dynamic bandwidth allocation function after described notice receiving element receives that described fault has been recovered notice;
Described notice transmitting element also is used for after described notice receiving element receives that described fault has been recovered notice, sends after the wait scheduled time to carry out to switch to recover notice.
18. multi-service transmitting network host node according to claim 17 is characterized in that,
Described notice receiving element also is used for receiving to protect to switch finishing notice;
Described allocated bandwidth control unit, also be used for described notice receiving element all receiving in two different transmission directions protection switch finish notice after, reopen dynamic bandwidth allocation function.
19. a multi-service transmitting network node is characterized in that, comprising:
Receiving element is used for receiving transmission convergence layer TC frame;
Fault detection unit links to each other with described receiving element, for detection of line fault;
Data processing unit, link to each other with described receiving element, be used for detecting circuit when normal at described fault detection unit, process the data in the transmission container T-CONT frame that belongs to this node in the service area in the TC frame on the receive direction, the position of T-CONT frame and bandwidth length are disposed by the host node in the multi-service transmitting network in the described service area, and the bandwidth allocation information indication by carrying in the described TC frame;
Switch unit links to each other with described fault detection unit, is used for protecting and switching when line fault, crossed in the T-CONT frame of rightabout protection zone by the data communication device of described fault effects and transmits; After line fault is recovered, data are returned to again from the service area transmit.
20. multi-service transmitting network node according to claim 19 is characterized in that, also comprises:
Message sending unit links to each other with described fault detection unit, is used for sending signalling trouble to host node after described fault detection unit detects line fault;
The message sink unit is used for receiving the bandwidth pressure update notification that host node sends;
Updating block, link to each other with described message sink unit, be used for after described message sink unit receives described bandwidth pressure update notification, upgrading the bandwidth allocation information in two different transmission directions of this node, and calculating position and the bandwidth length of protection channel in the TC frame;
Described message sending unit links to each other with described updating block, also is used for sending the bandwidth renewal to host node and finishing notice after described updating block renewal is finished;
Described message sink unit, the execute protection that also is used for the transmission of reception host node is switched notice;
Described switch unit links to each other with described message sink unit with described updating block, after described message sink unit receives that the execute protection of host node transmission is switched notice, protects and switches;
Described message sending unit links to each other with described switch unit, also is used for after described switch unit is finished protection and switched, and sends protection to host node and switches and finish notice.
21. multi-service transmitting network node according to claim 20 is characterized in that,
Described message sending unit also is used for sending fault to host node and having recovered notice after described fault detection unit detects the line fault recovery;
Described message sink unit, the recovery notice is switched in the execution that also is used for the transmission of reception host node;
Described switch unit, also be used for described message sink unit receive execution that host node sends switch recover notice after, carry out and switch recovery, return to the state before the fault.
22. the protection exchanging system of a multi-service transmitting network is characterized in that, comprising:
The multi-service transmitting network host node is used for arranging protection group, and described protection group is the wavelength channel that is positioned in the multi-service transmitting network in two different transmission directions of different fiber, and the wavelength channel in described two different transmission directions provides mutually the protection bandwidth; According to the bandwidth demand of the data to be transmitted in described two different transmission directions, distribute that all transmit the bandwidth of container T-CONT frames in the service area in the transmission convergence layer TC frame of the wavelength channel in described two different transmission directions; Send bandwidth allocation information by the TC frame, carry in the TC frame in described two different transmission directions the assignment information of the bandwidth of all T-CONT frames in the service area during TC frame transmission of the wavelength channel in each transmission direction;
The multi-service transmitting network node is used for receiving the TC frame according to the assignment information of described bandwidth, and when circuit is normal, and on each receive direction, node is only processed the data in the T-CONT frame that belongs to this node in the service area in the TC frame on the described receive direction; When line fault, protect and switch, crossed in the T-CONT frame of rightabout protection zone by the data communication device of described fault effects and transmit; After line fault is recovered, data are returned to again from the service area transmit.
23. system according to claim 22 is characterized in that, described multi-service transmitting network host node is each described multi-service transmitting network host node of claim 12 to 18.
24. system according to claim 22 is characterized in that, described multi-service transmitting network node is each described multi-service transmitting network node of claim 19 to 21.
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| EP1596539A1 (en) * | 2003-02-21 | 2005-11-16 | Nippon Telegraph and Telephone Corporation | Device and method for correcting a path trouble in a communication network |
| CN1812359A (en) * | 2005-01-25 | 2006-08-02 | 华为技术有限公司 | Loop network protection controlling method |
| CN1852058A (en) * | 2006-05-29 | 2006-10-25 | 浙江工业大学 | Protective optical-fiber ring net special for single-fiber two-direction duplexing section |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP1596539A1 (en) * | 2003-02-21 | 2005-11-16 | Nippon Telegraph and Telephone Corporation | Device and method for correcting a path trouble in a communication network |
| CN1812359A (en) * | 2005-01-25 | 2006-08-02 | 华为技术有限公司 | Loop network protection controlling method |
| CN1852058A (en) * | 2006-05-29 | 2006-10-25 | 浙江工业大学 | Protective optical-fiber ring net special for single-fiber two-direction duplexing section |
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