CN1753324A - Method of implementing M:N protection in communication network and its network node device - Google Patents
Method of implementing M:N protection in communication network and its network node device Download PDFInfo
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- CN1753324A CN1753324A CN 200410078237 CN200410078237A CN1753324A CN 1753324 A CN1753324 A CN 1753324A CN 200410078237 CN200410078237 CN 200410078237 CN 200410078237 A CN200410078237 A CN 200410078237A CN 1753324 A CN1753324 A CN 1753324A
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Abstract
This invention relates to a method for realizing M: N protection in a communication system and its network node device including determining a protection channel corresponding to a working channel needing protection based on the priority of the inversion request and the usage of the protection channel then delivering the ASP protocol signaling on the channel to bridge and invert the being protected channel to the corresponding protection channel according to the process result.
Description
Technical field
The present invention relates to network communications technology field, relate in particular to method and the network node device thereof of realizing the M:N protection in a kind of communication network.
Background technology
But it is a kind of survivability technology in itself that protection is switched.But the survivability technology is to improve the technology of the reliability performance of network by the ability that the service that recovers from service disruption is provided.This technology should be applied to all places that service is provided, and certainly for communication network, provides protection to switch essential condition especially.
Protection is switched in communication network and is had a wide range of applications.For example SDH/SONET (Synchronous Digital Hierarchy /) provides 1+1,1:N, and two fine ring/four fibre loop multiplying segment protections, SNCP (SNCP) protection and DNI (dual node interconnection) protection, and the protection of OTN (optical transfer network) etc.
The protected mode that does not all relate to M:N is switched in protection in each above communication network, and described M:N protected mode is meant the protected mode of M bar protection service aisle protection N bar service aisle.In communication network; the ability of the anti-inefficacy of protection passage and service aisle is identical generally speaking; therefore protecting passage also should be identical with the probability that service aisle lost efficacy; therefore adopt the 1:N protection; under the bigger situation of N, the probability of a protection of many service aisle contentions passage is still very big.At this moment, can not provide protection in the network, therefore, in communication network, carry out the M:N protection and be very necessary (1＜=M＜=N) for some service aisle.
For this reason; in US 2004/0022279 A1 patent application, provide corresponding M: the implementation method of N trail protection; in EP1014613 A2 patent application, described and carried out the 26S Proteasome Structure and Function that M:N protects the network node of switching; but all do not provide a complete M:N to protect the scheme of switching in two patent applications, and all exist corresponding deficiency.
Wherein, US 2004/0022279 A1 has described the method for M:N trail protection.In the method for the trail protection of the M:N that this patent provides, do not adopt APS (APS) agreement, and be to use the polyphone function for monitoring, oppositely lost efficacy indication and polyphone ID of trace route path of polyphone finished.Be specially: when on the work section, detecting inefficacy; fail message is informed the node of far-end by forcing insertion RDI (remote bug indication) to the mode in the polyphone path; till the end, the inefficacy path was received and distinguished on the protection path by unique ID of trace route path under having more than the situation in 1 protection path until lose efficacy.In the time of a plurality of protections path, a network node is defined as from node, and it and host node co-operating are to guarantee and the identical protection path of host node use.In failure recovery, used two timers to finish the recovery process that protection is switched.
As can be seen, there is following shortcoming in the method that provides of US 2004/0022279 A1 patent:
1, owing to do not adopt the APS agreement to realize, thereby the limited flexibility that makes its realization;
2, do not provide the support of switching order for FS (mandatory protection is switched), MS (artificial protection is switched), LP outsides such as (protection lockings).
In addition, the 26S Proteasome Structure and Function that carries out the network node that M:N protection switches has been described in EP1014613 A2 patent application.As shown in Figure 1, the node at the looped network of M:N mainly comprises the optical cross-matrix 70 among Fig. 1, is used for the bridge joint (two) of light signal and switches (function is received in choosing).Switch the network that comprises many independently optical switches in the matrix at light, each corresponding protection passage is linked on the protection light mouth by optical transceiver.Change light is switched network just can be at intranodal change protection passage separately.The multiplexing reconciliation multiplexing process of also guaranteeing replacement unit is used for signal that the light mouth receives and the conversion between the optical cross-matrix processing signals.There is a Failure Detector to be lost efficacy by detection signal after the demultiplexing at signal.At least comprise two network nodes at network, have two optical fiber to link to each other between network node, transmit Working service and protection business respectively.This patent application provides a kind of method of arranging the professional route of protection, makes at least two protection passage can protect a series of operation wavelength.
As can be seen, there is following shortcoming in this technical scheme:
1, only realizes protecting for the M:N between the different wave length of DWDM (dense wavelength division multiplexing);
2, the implementation method of protocol interaction is not provided in this patent application;
3, this device does not detect the state of protection passage, therefore for the situation of protection channel failure, will cause protecting the failure of switching.
Summary of the invention
In view of above-mentioned existing in prior technology problem; the purpose of this invention is to provide method and the network node device thereof of realizing the M:N protection in a kind of communication network; thereby guaranteed effectively under the less situation of protection passage, still can be assigned to the corresponding protection passage for the service aisle that needs most protection in the network.
The objective of the invention is to be achieved through the following technical solutions:
The invention provides the method that realizes the M:N protection in a kind of communication network, comprising:
A, be that service aisle to be protected is determined the protection passage corresponding with it according to the operating position of its priority and protection passage, and can be used for the protection of described service aisle by the described protection passage of the delivery confirmation of protocol signaling;
B, described service aisle bridge joint is switched on the described protection passage corresponding with it according to the result of agreement.
Described steps A comprises:
A1, determine corresponding priorities for the switching request of respectively protecting in the communication network;
A2, network node are that service aisle to be protected is determined the protection passage corresponding with it according to the priority of the protection switching request of receiving and the operating position of protection passage.
Described steps A 2 further comprises:
Determine protection passage of correspondence according to the priority of protection switching request and the numbering of service aisle to be protected and the operating position of protection passage for it.
Described steps A also comprises:
Between network node, transmit optical transfer network OTN by the protection passage in the communication network, multiprotocol label switching MPLS net, the protection switching request signaling that Synchronous Digital Hierarchy SDH Linear multiplex section network planning is fixed based on APS APS agreement.
The form of described protection switching request signaling comprises:
Solicited status field: the content that is used to carry the protection switching request;
Request channel field: be used to carry the channel information that needs protection and switch;
Bridged appearances field: be used to carry the channel information that needs bridge joint;
Use protection gap marker field: the operating position information that is used to carry the protection passage;
And comprise alternatively: be used for the protection type field of the protection type that adopts between the bearer network node and the check field that is used to carry check code.
Described steps A also comprises:
Preserve the protection switching request information of the service aisle respectively protect passage operating position information, described information to comprise protect path protection number and correspondence at the network node place.
Described steps A further comprises:
When A3, network node produce the protection switching request, be that described protection switching request is distributed the protection passage according to the protection passage operating position information of preserving, and the information-bearing of the protection passage that will distribute send to the opposite end network node in the protection switching request;
A4, described opposite end network node are revised the protection passage operating position information of preserving after receiving the protection switching request.
Described steps A 4 further comprises:
After the opposite end network node is received the protection switching request; at first determine according to the operating position of the protection passage of preserving whether the protection channel information that carries in the protection switching request is available,, then revise the operating position information of the protection passage of preserving if available; otherwise, return warning information.
Described steps A 4 also comprises:
Send the reverse request protocol signaling to the network node that sends the protection switching request.
Described steps A 3 also comprises:
Network node produces the protection switching request; and when determining that according to the operating position information of the protection passage of preserving all protection passages have been used; if the priority height of the protection switching request of the protection passage that the priority of this protection switching request has been used more; then will protect the low protection passage of switching request priority to discharge, and distribute to this protection switching request.
The method that realizes the M:N protection in the described communication network also comprises:
When the protection passage of transport service in the network is detected inefficacy or protected locking, be that it distributes new protection passage.
The method method that realizes the M:N protection in the described communication network also comprises:
When detecting unidirectional inefficacy for one in two network nodes, need all protect switching operation at two network nodes;
And,, the business recovery of corresponding protection passage need be transmitted in this service aisle when protected service aisle recovers just often.
The present invention also provides the network node device in the method that realizes the M:N protection in a kind of described communication network, comprising:
Bridge joint changeover apparatus: be used under the control of protocol processes device, realizing the bridging functionality of sendaisle and the switch function of receive path;
Protocol processes device: link to each other with bridge joint changeover apparatus, protocol signaling extraction element and protocol signaling dispensing device respectively, be used for the information of sending according to the protocol signaling extraction element, the operating position of local switching request and protection passage, carry out protocol processes, send control information to bridge joint changeover apparatus and protocol signaling dispensing device;
Protocol signaling extraction element: link to each other with the protection passage that transmits signaling, extract the signaling information that transmission comes in the passage, and send to the protocol processes device;
Local switching request extraction element: be used for extracting local switching request, and the switching request of extracting is sent to the protocol processes device from passage;
The protocol signaling dispensing device: link to each other with the passage that transmits signaling, the control signaling of the protocol processes device being sent by passage sends.
Described network node device also comprises:
Command input device is switched in the outside: link to each other with the protocol processes device, be used to receive the outside and switch order and send to the protocol processes device.
Described network node device also comprises:
Protection channel resource distributor: link to each other with the protocol processes device, be used for the resource of administrative protection passage, and protect the distribution of channel resource by the protocol processes device.
As seen from the above technical solution provided by the invention; the present invention can determine the corresponding protection passage according to the priority of the protection switching request of service aisle to be protected and the operating position of protection passage, thereby has guaranteed that situation that a plurality of service aisles lost efficacy can carry out correct protection and switch.When even all protection passages are occupied; may be the protection passage of corresponding work channel allocation correspondence still according to the priority of protection switching request; guaranteed effectively under the less situation of protection passage; still can be assigned to the corresponding protection passage, improve reliability of service transmission in the network for the service aisle that needs most protection in the network.
Description of drawings
Fig. 1 is the structural representation of realization M:N of the prior art protection;
Fig. 2 is a schematic network structure;
Fig. 3 is a network node internal structure schematic diagram;
Fig. 4 is the flow chart of method of the present invention.
Embodiment
Core of the present invention is to be defined as it according to the operating position of the priority of service aisle to be protected and protection passage corresponding protection is provided in communication network; thereby making to provide under the situation of protection by service aisle to be protected for all; be preferably the higher service aisle of priority level protection is provided, to optimize network transmission performance.
In the method for the present invention; be to pass through overhead byte; special message, perhaps special-purpose control channel is transmitted the turning protocol order, by the mutual realization M:N protection of signaling; support is for FS; MS, order is switched in outsides, ground such as LP, the setting of supportive protection passage priority; the protection passage can transmit functions such as extra traffic, is the more powerful M:N implementation method of a kind of function ratio.
The present invention does not have special requirement to the network topology structure of using, and can be annular, can be chain, can be MESH (net) shape, as long as N bar service aisle is arranged between two network entities, M bar protection passage gets final product, and 1＜=M＜=N.
Among the present invention; to the network node bridge joint and the requirement of switching be: for network node arbitrarily; must have business two (being bridge joint) functions of sending out on any protection and operating path, (promptly switching) function is received in the choosing that must have simultaneously on any operating path.As shown in Figure 2, three service aisles and two protection passages between node A and the Node B.Only illustrated among the figure between a service aisle and two the protection passages bridge joint and switch relation, the two other service aisle is similar to it with the relation of protecting passage.
Among the present invention; transmission channels for agreement does not have special requirement yet; as long as can finish two signaling transmission between the network node; it can be special overhead byte; as the k1 among the SDH; the k2 overhead byte; it also can be the message of special format; as (the operation of the OAM among the MPLS (multiprotocol label switching); administer and maintain) message; certainly special-purpose signalling path also can; as in the overhead byte of M bar protection passage, transmitting signaling, then can stipulate not to be used the passage (the protection passage that is used as protection at last) of the numbering minimum of protecting the service aisle business as the passage that transmits current signaling.
In the description at the specific embodiment of the present invention, be to be described below to transmit means of signaling in the overhead byte by M bar protection passage.
Because OTN (optical transfer network); MPLS, the SDH Linear multiplex section is by corresponding international standard regulation, therefore for the protection switching request; the present invention can adopt the protection switching request that all regulations are supported as the present invention in order to support the relevant regulations of international standard.Set corresponding priority level for each protection switching request for it, promptly each switching request has the size of priority, so that be its distribution corresponding protection passage according to the priority of the protection switching request of service aisle; Priority as shown in table 1 has high to low from top to bottom, and service aisle under the identical situation of switching request, is numbered the priority height of little request according to 1～N numbering.The protection passage is numbered according to 1～M, and under the situation that does not have special dedicated signaling passage, the protection passage that can number M is used to transmit protocol signaling.
Table 1
| Local request (initiation order automatically just, state and outside the initiation are ordered) | Priority orders (from top to bottom from high to low) |
| Lockout of Protection (LO), the protection locking | Priority 1 |
| Forced Switch (FS), Forced Switch | Priority 2 |
| Signal Fail (SF), Signal Fail | Priority 3 |
| Signal Degrade (SD), Signal Degrade | Priority 4 |
| Manual Switch (MS), Manual Switch | Priority 5 |
| Wait to Restore (WTR), Wait-to-Restore | Priority 6 |
| Exercise (EXER), Exercise Switching | Priority 7 |
| Reverse Request (RR), reverse request | Priority 8 |
| Do Not Revert (DNR) does not recover | Priority 9 |
| No Request (NR), unit's request | Priority 10 |
Among the present invention, the protection switching request signaling of transmitting between network node can adopt following form to send, and is as shown in table 2:
Table 2
| 1 | 2 | 3 | 4 | ||||||||||||||||||||||||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Request/ state | Protection type | Requested Channel | Bridged Channel | Used Protect Channel Flag | |||||||||||||||||||||||||||
| A | D | R | A | B | C | D | E | F | G | H |
In table 2:
Request/state field: be protection switching request mode field, be used to carry the content of protection switching request;
Protection type field: for the protection type field, be used for the protection type that bearer network is used, as the 1:1 protection, the 1:N protection, M:N protection or the like, the content that specifically comprises is as shown in table 3;
Requested Channel field: be the service aisle field of asking for protection, be used to carry service aisle information to be protected;
Bridged Channel field:, be used to carry the service aisle information of bridge joint for bridge joint gets the service aisle field.
Used Protect Channel Flag field: the operating position information that is used to carry the protection passage.
Each field can be carried following content information respectively in table 2, and is as shown in table 3:
Table 3
| Field | Value | Description | |
| Request/State | 1111 | Lockout of Protection (LO), the protection locking | |
| 1110 | Forced Switch (FS), Forced Switch | ||
| 1100 | Signal Fail (SF), Signal Fail | ||
| 1010 | Signal Degrade (SD), Signal Degrade | ||
| 1000 | Manual Switch (MS), Manual Switch | ||
| 0110 | Wait to Restore (WTR), Wait-to-Restore | ||
| 0100 | Exercise (EXER), Exercise Switching | ||
| 0010 | Reverse Request (RR), reverse request | ||
| 0001 | Do Not Revert (DNR) does not recover | ||
| 0000 | No Request (NR) does not have request | ||
| Others | Reserved for future international standardization keeps, for expansion is later on used | ||
| Protection Type | A | 11 | Reserved for future Usage keeps, for expansion is later on used |
| 10 | M:n (no Permanent Bridge), the M:N protection | ||
| 01 | 1+1 (Permanent Bridge), 1+1 protection | ||
| Field | Value | Description | ||
| 00 | 1:n (no Permanent Bridge), the 1:n protection | |||
| D | 0 | Unidirectional switching, unidirectional switching | ||
| 1 | Bidirectional switching, dual-ended switching | |||
| R | 0 | Non-revertive operation, non-recovery formula protection | ||
| 1 | Revertive operation, the protection of recovery formula | |||
| Requested Channel | 0 | Null Signal, the service aisle of not asking for protection | ||
| 1-255 | Normal Traffic Channel 1-254, the service aisle of asking for protection | |||
| Bridged Channel | 0 | Null Signal does not have the service aisle of bridge joint | ||
| 1-255 | Normal Traffic Channel 1-254, the service aisle of bridge joint | |||
| Used Protect Channel Flag | A | 0 | No. 1 protection of No 1 Protect Channel is not used for protection passage is not used | |
| 1 | No. 1 protection of No 1 Protect Channel is used for protection passage is used | |||
| B | 0 | No 2 Protect Channel is not used for protection | ||
| 1 | No 2 Protect Channel is used for protection | |||
| C | 0 | No 3 Protect Channel is not used for protection | ||
| 1 | No 3 Protect Channel is used for protection | |||
| D | 0 | No 4 Protect Channel is not used for protection | ||
| 1 | No 4 Protect Channel is used for protection | |||
| E | 0 | No 5 Protect Channel is not used for protection | ||
| 1 | No 5 Protect Channel is used for protection | |||
| F | 0 | No 6 Protect Channel is not used for protection | ||
| 1 | No 6 Protect Channel is used for protection | |||
| G | 0 | No 7 Protect Channel is not used for protection | ||
| 1 | No 7 Protect Channel is used for protection | |||
| H | 0 | No 8 Protect Channel is not used for protection | ||
| 1 | No 8 Protect Channel is used for protection | |||
Among the present invention, as can be seen, the present invention can support maximum 8 protection passages, should satisfy the network instructions for use usually from the definition of above-mentioned protection switching request signaling.Promptly can realize the protection of 8:255 at most.
Certainly, among the present invention, also can adopt the protection switching request signaling of extended formatting, but need to adopt the protection switching request signaling that comprises each following information usually:
Switching request, the channel number of switching, the channel number of bridge joint, the type of agreement, and the sign of the protection passage that is used.
And, can also carry out verification to protection switching request signaling, need to increase corresponding check field for this reason, be used to carry check code.
Among the present invention, also need preserve a protection passage operating position information table in the inside of each network node, the content of table is as shown in table 4, the operating position of each protection passage has been described in the form, comprise which service aisle each protection passage is used to protect, and what the switching request of corresponding work passage is; For example, record in the table 4, the protection channel number be 1 protection passage to be used to protect service aisle number be 5 service aisle, corresponding switching request is Forced Switch FS.
Table 4
| The protection channel number | The channel number of the service aisle of protection | The type of request |
| 1 | 5 | FS |
| 2 | 8 | MS |
| 3 | Default Value, default value | Default Value |
| …………… | ………………… | ………………… |
| M | Default Value | Default Value |
Corresponding description has been done to the partial content that relates in the method for the present invention in the front, below in conjunction with accompanying drawing the specific implementation of method of the present invention is carried out complete, detailed description.
Specific implementation of the present invention specifically comprises as shown in Figure 3 and Figure 4:
Step 41: need protect when switching when a certain passage in the network, network node A produces a new switching request, for example asks service aisle 5 is switched in the protection passage;
Step 42: when network node A detects this switching request, inquire about the protection passage operating position information table of oneself safeguarding, determine the protection passage that can be used to protect in the table, for example, the protection passage of definite numbering minimum that is not used, as shown in table 4, be the protection passage of numbering 3;
Step 43: send the order of protection switching request by chosen protection passage, with table 4 is example, then can send protection switching request signaling according to described signaling format by the protection passage of numbering 3, wherein the Requested Signal field of protocol signaling fills out 5, and the value of Bridged Signal field is a default value;
In network node A; if finding used protection passage all is used; then needing to carry out channel occupation handles; be specially: according to described protection switching request priority inquiry protection passage operating position information table; the protection passage that the switching request priority of finding out a service aisle from table is lower than this protection switching request discharges; the protection passage that discharges is used to protect the business on the service aisle of this protection switching request; if exist a plurality of priority to be lower than the protection passage of this protection switching request; then discharge the minimum protection passage of its medium priority; if there is the minimum protection passage of a plurality of switching request priority, then discharge the wherein maximum protection passage of numbering.
Step 44: the network node B of opposite end detects the protection switching request signaling that network node A sends, after receiving that promptly network node A is by the new protection switching request signaling of numbering 3 protection passage and transmitting, network node B upgrades the content in the protection passage operating position information table that this node preserves, change the value of channel number of the service aisle of the protection of protection passage 3 into 5, the type of request changes the protection switching request information that passes over into;
If after network node B checks the content of protecting in the passage operating position information table; find that the protection passage of numbering less than 3 also is not used to protection; perhaps number 3 protection passage and be used to protect other service aisle; then to the reporting of user warning information, and will protect passage operating position information table to revert to receive value before the switching request.And return the reverse request signaling: because the bridged appearances field of not carrying out in bridge joint so the signaling is kept original value, in the signaling among the Used Protect Channel Flag value of C field be 0.The opposite end receives that this switches different according to the two ends again operating position of switching passage after the signaling, finds out one and can be initiated switching request again by the protection passage (for example two ends all not have the protection passage of use) that two ends can receive;
Step 45: can be used to protection if confirm No. 3 protection passages, sending request type at the protection passage that is numbered 3 to network node A is the reverse request protocol signaling, with table 2 and table 3 is example, the value of Requested Signal field in the signaling and Bridged Signal field all is 3, in the signaling among the UsedProtect Channel Flag value of C field be 1; Simultaneously, in the business of bridge joint service aisle 5 on the network node B to protection passage 3;
Step 46: network node A receives the protocol signaling of reverse request, upgrades the content in the protection passage operating position information table among the network node A.Change the value of the channel number of the service aisle of protection passage 3 protections in the table into 5, request changes the request of service aisle 5 into; Simultaneously, receive business from 3 choosings of protection passage, the business of bridge joint service aisle 5 is to protection passage 3;
Step 47: network node A sends protection switching request signaling on protection passage 3, the value of Bridged Signal field is 3 in the signaling, and the value of C field is 1 among the Used Protect Channel Flag in the signaling;
Step 48: network node B is after receiving the protection switching request signaling that network node A sends on the protection passage 3; to receive professional from 3 choosings of protection passage; simultaneously, send the protective switching demand signalling, switch success to inform network node B bridge joint to network node A.
Also comprise among the present invention; certain protection passage issue outer protection locking and this locality detect protect channel failure after; whether detect has untapped protection passage; if have, the professional bridge joint of the service aisle of present protection path protection is switched on the protection passage of the numbering minimum that is not used.If all be used, then the protection switching request of this protection service aisle that passage is protected is used as a new protection switching request, the priority competition according to this protection switching request in the protection passage that is used obtains the corresponding protection passage.
Among the present invention; in order to prevent shake; need be after removing be switched in this locality; a timer (each has switched a timer) is arranged; just discharge the action of switching with bridge joint after timer expiry, business really returns on the service aisle, sends the protocol signaling of WTR before timer expiry; if at this moment produce new switching request, then the switching request of this passage is participated in seizing of protection passage according to WTR.
The protocol type of supporting can be a unidirectional switching, also can be dual-ended switching, and when the end in transmission path two end nodes detected unidirectional inefficacy, only this end was switched and is called unidirectional switching, or two ends all switch, and then is called dual-ended switching; Can be that the recovery formula also can be non-recovery formula, described recovery formula is meant that working as protected service aisle recovers just often, business on the protection passage can return in the service aisle again to be transmitted, and described non-recovery formula then can not return to described business in the service aisle again to be transmitted; But, default to both-end, the recovery formula in order effectively to use the protection passage to transmit extra traffic.For two network nodes at two ends, if the type difference of agreement is then handled according to both-end and recovery formula.
The structure of the network node device in the method that realizes the M:N protection in the communication network described in the present invention is described below, described network node specifically comprises as shown in Figure 3 again:
Bridge joint changeover apparatus: link to each other with the protection passage with service aisle respectively, be used under the control of protocol processes device realizing the bridging functionality of sendaisle and the switch function of receive path that the control information that promptly receives the protocol processes device realizes the bridge joint switching operation in the communication network;
The protocol processes device: the protocol processes device is the core that network node is realized defencive function, link to each other with bridge joint changeover apparatus, protocol signaling extraction element and protocol signaling dispensing device respectively, the information that is used for sending according to the protocol signaling extraction element sends control information to bridge joint changeover apparatus and protocol signaling dispensing device;
The protocol signaling extraction element: link to each other with the passage that transmits signaling, extract the signaling information that transmission comes in the passage, and send to the protocol processes device, the passage that transmits signaling can be the protection passage;
Local switching request extraction element: be used for extracting local switching request, and the switching request of extracting is sent to the protocol processes device from passage;
The protocol signaling dispensing device: link to each other with the passage that transmits signaling, the control signaling of the protocol processes device being sent by passage sends, thereby transmits signaling information between network node.
Described network node device also comprises alternatively:
Command input device is switched in the outside: link to each other with the protocol processes device, be used to receive the outside and switch order and send to the protocol processes device, make the present invention can support the outside to switch order, promptly externally switch under the control of order and carry out the bridge joint switching operation.
Described network node device also comprises alternatively:
Protection channel resource distributor: link to each other with the protocol processes device; the resource that is used for the administrative protection passage; it is the operating position of administrative protection passage; and protect the distribution of channel resource by the protocol processes device, the protocol processes device can be that service aisle to be protected distributes the corresponding protection passage according to the operating position of protection passage.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (15)
1, realize the method for M:N protection in a kind of communication network, it is characterized in that, comprising:
A, be that service aisle to be protected is determined the protection passage corresponding with it according to the operating position of its priority and protection passage, and can be used for the protection of described service aisle by the described protection passage of the delivery confirmation of protocol signaling;
B, described service aisle bridge joint is switched on the described protection passage corresponding with it according to the result of agreement.
2, realize the method for M:N protection in the communication network according to claim 1, it is characterized in that described steps A comprises:
A1, determine corresponding priorities for the switching request of respectively protecting in the communication network;
A2, network node are that service aisle to be protected is determined the protection passage corresponding with it according to the priority of the protection switching request of receiving and the operating position of protection passage.
3, realize the method for M:N protection in the communication network according to claim 2, it is characterized in that described steps A 2 further comprises:
Determine protection passage of correspondence according to the priority of protection switching request and the numbering of service aisle to be protected and the operating position of protection passage for it.
4, realize the method for M:N protection in the communication network according to claim 1, it is characterized in that described steps A also comprises:
Between network node, transmit optical transfer network OTN by the protection passage in the communication network, multiprotocol label switching MPLS net, the protection switching request signaling that Synchronous Digital Hierarchy SDH Linear multiplex section network planning is fixed based on APS APS agreement.
5, realize the method for M:N protection in the communication network according to claim 4, it is characterized in that the form of described protection switching request signaling comprises:
Solicited status field: the content that is used to carry the protection switching request;
Request channel field: be used to carry the channel information that needs protection and switch;
Bridged appearances field: be used to carry the channel information that needs bridge joint;
Use protection gap marker field: the operating position information that is used to carry the protection passage;
And comprise alternatively: be used for the protection type field of the protection type that adopts between the bearer network node and the check field that is used to carry check code.
6, according to the method that realizes the M:N protection in claim 1,2,3, the 4 or 5 described communication networks, it is characterized in that described steps A also comprises:
Preserve the protection switching request information of the service aisle respectively protect passage operating position information, described information to comprise protect path protection number and correspondence at the network node place.
7, realize the method for M:N protection in the communication network according to claim 6, it is characterized in that described steps A further comprises:
When A3, network node produce the protection switching request, be that described protection switching request is distributed the protection passage according to the protection passage operating position information of preserving, and the information-bearing of the protection passage that will distribute send to the opposite end network node in the protection switching request;
A4, described opposite end network node are revised the protection passage operating position information of preserving after receiving the protection switching request.
8, realize the method for M:N protection in the communication network according to claim 7, it is characterized in that described steps A 4 further comprises:
After the opposite end network node is received the protection switching request; at first determine according to the operating position of the protection passage of preserving whether the protection channel information that carries in the protection switching request is available,, then revise the operating position information of the protection passage of preserving if available; otherwise, return warning information.
9, realize the method for M:N protection in the communication network according to claim 7, it is characterized in that described steps A 4 also comprises:
Send the reverse request protocol signaling to the network node that sends the protection switching request.
10, realize the method for M:N protection in the communication network according to claim 7, it is characterized in that described steps A 3 also comprises:
Network node produces the protection switching request; and when determining that according to the operating position information of the protection passage of preserving all protection passages have been used; if the priority height of the protection switching request of the protection passage that the priority of this protection switching request has been used more; then will protect the low protection passage of switching request priority to discharge, and distribute to this protection switching request.
11, realize the method for M:N protection in the communication network according to claim 1, it is characterized in that this method also comprises:
When the protection passage of transport service in the network is detected inefficacy or protected locking, be that it distributes new protection passage.
12, realize the method for M:N protection in the communication network according to claim 1, it is characterized in that this method also comprises:
When detecting unidirectional inefficacy for one in two network nodes, need all protect switching operation at two network nodes;
And,, the business recovery of corresponding protection passage need be transmitted in this service aisle when protected service aisle recovers just often.
13, the network node device in the method for realization M:N protection in a kind of described communication network is characterized in that, comprising:
Bridge joint changeover apparatus: be used under the control of protocol processes device, realizing the bridging functionality of sendaisle and the switch function of receive path;
Protocol processes device: link to each other with bridge joint changeover apparatus, protocol signaling extraction element and protocol signaling dispensing device respectively, be used for the information of sending according to the protocol signaling extraction element, the operating position of local switching request and protection passage, carry out protocol processes, send control information to bridge joint changeover apparatus and protocol signaling dispensing device;
Protocol signaling extraction element: link to each other with the protection passage that transmits signaling, extract the signaling information that transmission comes in the passage, and send to the protocol processes device;
Local switching request extraction element: be used for extracting local switching request, and the switching request of extracting is sent to the protocol processes device from passage;
The protocol signaling dispensing device: link to each other with the passage that transmits signaling, the control signaling of the protocol processes device being sent by passage sends.
14, network node device according to claim 13 is characterized in that, also comprises:
Command input device is switched in the outside: link to each other with the protocol processes device, be used to receive the outside and switch order and send to the protocol processes device.
15, network node device according to claim 13 is characterized in that, also comprises:
Protection channel resource distributor: link to each other with the protocol processes device, be used for the resource of administrative protection passage, and protect the distribution of channel resource by the protocol processes device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100782378A CN100421359C (en) | 2004-09-21 | 2004-09-21 | Method of implementing M:N protection in communication network and its network node device |
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| CNB2004100782378A CN100421359C (en) | 2004-09-21 | 2004-09-21 | Method of implementing M:N protection in communication network and its network node device |
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| CN1753324A true CN1753324A (en) | 2006-03-29 |
| CN100421359C CN100421359C (en) | 2008-09-24 |
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| WO2009062350A1 (en) * | 2007-11-15 | 2009-05-22 | Zte Corporation | A linear protection method of the optical network |
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