CN101944950A - Processing method and device for loading extra service in optical transport network (OTN) - Google Patents
Processing method and device for loading extra service in optical transport network (OTN) Download PDFInfo
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- CN101944950A CN101944950A CN200910158907XA CN200910158907A CN101944950A CN 101944950 A CN101944950 A CN 101944950A CN 200910158907X A CN200910158907X A CN 200910158907XA CN 200910158907 A CN200910158907 A CN 200910158907A CN 101944950 A CN101944950 A CN 101944950A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 29
- 238000003672 processing method Methods 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000012546 transfer Methods 0.000 claims description 25
- 238000012545 processing Methods 0.000 claims description 23
- 238000010586 diagram Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
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- 238000006243 chemical reaction Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/08—Intermediate station arrangements, e.g. for branching, for tapping-off
- H04J3/085—Intermediate station arrangements, e.g. for branching, for tapping-off for ring networks, e.g. SDH/SONET rings, self-healing rings, meashed SDH/SONET networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
- H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
- H04J2203/0028—Local loop
- H04J2203/0039—Topology
- H04J2203/0042—Ring
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
- H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
- H04J2203/0057—Operations, administration and maintenance [OAM]
- H04J2203/006—Fault tolerance and recovery
Abstract
The invention discloses a processing method and a device for loading an extra service in an optical transport network (OTN), which is used for an intermediate node in a protection path. The method comprises the following steps: detecting protection protocol information of automatic protection switching (APS) of a protection path; and if the APS protection protocol information indicates that the current state of the protection path is switched to a no-request state from a switching state or a bridging state, disconnecting the punch-through connection of an intermediate node and/or loading an extra service on the intermediate node. By using the technical scheme, the extra service can be loaded on the intermediate node on the OTN linear protection path, thereby reducing the operating restriction of the extra service.
Description
Technical field
The present invention relates to communication technical field, relate in particular to extra traffic loading processing method and device in a kind of optical transfer network in the communications field.
Background technology
Optical transfer network (Optical Transmission Network abbreviates OTN as) is based on wavelength-division multiplex technique, at the transmission net of photosphere organization network, is follow-on Backbone Transport Network.
Appearance based on the transmission net of OTN progressively comes true the ASON that people are expected, for network operator and client provide safe and reliable, price effectively, can manage, exercisable light delivery platform of new generation.
In optical transfer network,, linear protection mechanism has been proposed based on light data cell (Optical Data Units abbreviates ODUk as) looped network protection characteristic.At present the standard of OTN has provided the linear protection mechanism based on ODUk in G.873.1; G.873.1 two kinds of linear protection modes of 1+1 and 1:N have been defined in; but in above-mentioned two kinds of protected modes; only stipulated the linear protection control method of node switches, bridge joint from beginning to end; and for the intermediate node on the linear protection path; requirement is configured to the business of fixedly break-through; make the intermediate node in protection path can not load extra traffic; can only load extra traffic at the head and the tail node in protection path, the use of extra traffic is had certain restriction.
Summary of the invention
At in the correlation technique owing to can't load extra traffic at the intermediate node in OTN linear protection path; thereby the use to extra traffic has the problem of certain limitation and proposes the present invention; for this reason; main purpose of the present invention is to provide extra traffic loading method and device in a kind of improved optical transfer network, one of to address the above problem at least.
According to an aspect of the present invention, provide extra traffic loading processing method in a kind of optical transfer network.
According to extra traffic loading processing method in the optical transfer network of the present invention, be applied to protect the intermediate node in the path, this method comprises: the APS APS protection protocol information that detects the protection path; If APS protection protocol information indication protection path current state is for to be converted to no solicited status by switch status or bridge status, the break-through that then disconnects intermediate node connects, and/or, load extra traffic at intermediate node.
According to a further aspect in the invention, provide extra traffic loading processing device in a kind of optical transfer network.
Comprise according to extra traffic loading processing device in the optical transfer network of the present invention: detecting unit, processing unit, wherein, detecting unit is used to detect the APS protection protocol information of protecting the path; Wherein, APS protection protocol information comprises: the information of indication protection path current state; Processing unit is used for protecting the path current state for to be converted under the situation of no solicited status by switch status or bridge status in the indication of APS protection protocol information, and the break-through that disconnects intermediate node connects, and/or, load extra traffic at intermediate node.
By the present invention, extra traffic loading scheme in a kind of optical transfer network is provided, the information of this protection path current state conversion of indication that APS (Automatic Protection Switched abbreviates APS as) the protection protocol information in detection protection path comprises; If information indication protection path current state is for to be converted to no solicited status by switch status or bridge status, the break-through that disconnects intermediate node connects, and loads extra traffic at intermediate node.Solved in the correlation technique owing to can't on the intermediate node in OTN linear protection path, load extra traffic; thereby the problem that the use of extra traffic is had certain limitation; and then can on the intermediate node in OTN linear protection path, load extra traffic, reduced use restriction to extra traffic.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of being write, claims and accompanying drawing.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the linear protection network diagram based on the ODUk granularity according to the embodiment of the invention;
Fig. 2 is the flow chart according to extra traffic loading processing method in the optical transfer network of the embodiment of the invention;
The schematic diagram of Fig. 3 for selecting according to network state according to the intermediate node of the embodiment of the invention to insert extra traffic or protect break-through to connect;
Fig. 4 for switch according to being in of the embodiment of the invention or the protection path of bridge status in the connection status schematic diagram of a certain intermediate node;
Fig. 5 is the connection status schematic diagram according to a certain intermediate node in the protection path that is in no solicited status of the embodiment of the invention;
Fig. 6 is the structured flowchart according to extra traffic loading processing device in the optical transfer network of the embodiment of the invention;
Fig. 7 is the structured flowchart of extra traffic loading processing device in the optical transfer network according to the preferred embodiment of the invention.
Embodiment
Functional overview
Consider in the correlation technique owing to can't on the intermediate node in OTN linear protection path, load extra traffic, thereby the use of extra traffic is had the problem of certain limitation, proposed extra traffic loading method and device in a kind of improved optical transfer network.In embodiments of the present invention; middle pass-through nodes at the ODUk linear protection increases special processing; make pass-through nodes can extract APS protection protocol information and the state of current protection passage is judged; when finding the protection passage for nothing request (free time) state; can on the protection path, load extra traffic as required; when finding that the protection passage need be taken by regular traffic,, and protect passage to be set to pass-through state then with the extra traffic unloading.
Under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, and be not used in qualification the present invention.
Method embodiment
According to the embodiment of the invention, at first provide extra traffic loading processing method in a kind of optical transfer network.
At first introduce OTN linear protection network in conjunction with Fig. 1 below, Fig. 1 is the linear protection network diagram based on the ODUk granularity according to the embodiment of the invention.As shown in Figure 1; this protection is based on the ODUk granularity; the linear protection network comprises two paths: operating path A-E-F-G-D and protection path A-B-C-D; wherein; operating path is used for main (operate as normal) business of carrying; can't carry at operating path under the situation of current business, can use protection path carrying operating path loaded service.Said method is reverse method at transmit leg, at the recipient, is bridging method.When the protection path is in no solicited status, can load extra traffic thereon.In order on the intermediate node in protection path, to load extra traffic; need increase special processing in middle pass-through nodes; make pass-through nodes can extract APS protection protocol information and the state of current protection passage is judged; when finding the protection passage, can on the protection path, load extra traffic as required for nothing request (free time) state.
Fig. 2 is the flow chart according to extra traffic loading processing method in the optical transfer network of the embodiment of the invention.Shown in 2, mainly comprise following processing (step S201-step S203) according to extra traffic loading method in the optical transfer network of the embodiment of the invention:
Step S201: the APS protection protocol information that detects the protection path;
Wherein, APS protection protocol information comprises: the information of indication protection path current state.
Step S203: if information indication protection path current state is for to be converted to no solicited status by switch status or bridge status, the break-through that then disconnects intermediate node connects, and/or, load extra traffic at intermediate node.
Preferably; above-mentioned APS protection protocol information is made up of the APS byte; during APS byte in detecting the ODUk passage of participation protective; discovery APS byte is designated as by other state (promptly switching or the bridge joint relevant action at the head and the tail node) when being converted to no solicited status, has following two kinds of processing modes:
(1) if this node disposes extra traffic, then send instruction (message) by professional cross-connection unit to this node, the protection break-through that disconnects this node connects, and extra traffic is connected in the protection ODUk passage.
(2) if this node does not dispose extra traffic, then send instruction (message) by professional cross-connection unit to this node, the protection break-through that only disconnects this node connects.
Preferably, no solicited status is converted to and switches or bridge status if information indication protection path current state is served as reasons, and it is pass-through state that intermediate node then is set.If loaded extra traffic before, then unload this extra traffic.
Wherein, when the current state no solicited status of serving as reasons in above-mentioned protection path is converted to and switches or during bridge status; show that current protection path need carry the operate as normal business; the extra traffic that needs before to have loaded unloads; and protect the path to be set to pass-through state, with carrying operate as normal business.
Preferably, after having loaded extra traffic, need send message to the expense Cross module of intermediate node, wherein, this message carries the information of the APS overhead byte passage of indication break-through intermediate node.
Wherein, expense, is in the frame in transport process with professional.Therefore, after loading extra traffic, disconnect,, need break-through APS overhead byte passage for the expense of keeping the protection path connects because the protection break-through of this node connects.
Pass through the foregoing description; extra traffic loading processing method in a kind of optical transfer network is provided; adopt this method; can strengthen the flexibility of using based on the ODUk linear protection in the OTN network; extra traffic needn't be limited between the head and the tail node dispose, reduced to use the restriction of extra traffic.
Example
If there is OTN linear protection network as shown in Figure 1, this is protected based on the ODUk granularity, and wherein operating path is A-E-F-G-D, and the protection path is A-B-C-D.According to the OTN protective standard G.873.1, only at head and the tail node A with D switches and bridge joint, and whether send decision-makings such as extra traffic.Extra traffic loading processing scheme by the embodiment of the invention provides can dispose extra traffic between B and C.
For example; need insert extra traffic at the B point; as shown in Figure 3; Node B can select insert extra traffic (be the east orientation ODUk of disconnected node B and west to being connected of ODUk, insert extra traffic) or protect break-through to connect (the east orientation ODUk and western being connected to ODUk that are pass-through nodes B) according to network state.The technical scheme that example provides according to the present invention, below carrying out, handles the intermediate node B in protection path:
(1) detects east orientation ODUk and the west APS byte in the ODUk node, if finding current state switches (not having request) state by nothing and becomes switch status, then carry out (2),, then carry out (3) if find that current state becomes no switch status (no solicited status) by switch status;
(2) the professional cross unit to this node sends instruction, realizes that east orientation ODUk is connected with the protection break-through of west to ODUk, can be referring to Fig. 4.
Fig. 4 for switch according to being in of the embodiment of the invention or the protection path of bridge status in the connection status schematic diagram of intermediate node B.Wherein, the operate as normal business need be carried in this protection path, therefore needs the unloading extra traffic, promptly disconnects the connection of extra traffic; And the break-through protection connects, i.e. break-through east orientation ODUk and west being connected to ODUk.
(3) the professional cross unit to this node sends instruction, and extra traffic is connected to east orientation ODUk, can be referring to Fig. 5.
(4) the expense Cross module to this node sends instruction, and east orientation ODUk and west are intersected (being break-through APS overhead byte passage) mutually to the APS of ODUk byte, can be referring to Fig. 5.
Fig. 5 is the connection status schematic diagram according to intermediate node B in the protection path that is in no solicited status of the embodiment of the invention.Wherein, this protection path need not to carry the operate as normal business, needs to load extra traffic, extra traffic can be connected on the east orientation ODUk.After having loaded extra traffic, need send message, the APS overhead byte passage of break-through intermediate node B to the expense Cross module of intermediate node.
Device embodiment
According to the embodiment of the invention, also provide extra traffic loading processing device in a kind of optical transfer network.
Fig. 6 is the structured flowchart according to extra traffic loading processing device in the optical transfer network of the embodiment of the invention.Fig. 7 is the structured flowchart of extra traffic loading processing device in the optical transfer network according to the preferred embodiment of the invention.As shown in Figure 6, comprise according to extra traffic charger in the optical transfer network of the embodiment of the invention: detecting unit 1 and processing unit 2.
Wherein, detecting unit 1 is used to detect the APS protection protocol information of protecting the path, and wherein, APS protection protocol information comprises: the information of indication protection path current state;
Processing unit 2 is connected to detecting unit 1, is used for protecting the path current state for to be converted under the situation of no solicited status by switch status or bridge status in the information indication, and the break-through that disconnects intermediate node connects, and loads extra traffic at intermediate node.
Preferably, as shown in Figure 7, processing unit 2 may further include: decision-making module 20, expense Cross module 22 and load-on module 24, and wherein, decision-making module 20 is used for determining according to the information of indication protection path current state the connection of disconnection intermediate node; Expense Cross module 22 is used to disconnect the connection of intermediate node; Load-on module 24 is used for loading extra traffic at intermediate node.
Preferably, above-mentioned decision-making module 20 also is used for determining whether according to the information of indication protection path current state the connection of break-through intermediate node; Above-mentioned expense Cross module 22 also is used for the connection of break-through intermediate node; Processing unit 2 can also comprise: Unload module 26 is used at intermediate node unloading extra traffic.
Preferably, above-mentioned expense Cross module 22 also is used for break-through APS overhead byte passage.
By the foregoing description, provide extra traffic loading processing device in a kind of optical transfer network.Make the extra traffic on the ODUk protection path loading on the intermediate node arbitrarily, and do not influence the function of ODUk protection itself.
In sum; pass through the above embodiment of the present invention; middle pass-through nodes at the ODUk linear protection increases special processing; make pass-through nodes can extract APS protection protocol information and the state of current protection passage is judged; when finding that the protection passage is idle condition; can on the protection path, load extra traffic as required; can be so that the extra traffic on the ODUk protection path can load on the intermediate node arbitrarily; do not influence the function of ODUk protection itself, and strengthened the flexibility of using based on the ODUk linear protection in the OTN network.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. extra traffic loading processing method in the optical transfer network is applied to protect the intermediate node in the path, it is characterized in that described method comprises:
Detect the APS APS protection protocol information in described protection path;
If described APS protection protocol information indicates described protection path current state for to be converted to no solicited status by switch status or bridge status, the break-through that then disconnects described intermediate node connects, and/or, load extra traffic at described intermediate node.
2. method according to claim 1 is characterized in that, described APS protection protocol information comprises: the information of indicating described protection path current state.
3. method according to claim 1 is characterized in that, the break-through that disconnects described intermediate node connects and comprises:
Professional cross unit to described intermediate node sends first message, and wherein, described first message carries the information that indication disconnects the break-through connection of described intermediate node;
Described professional cross unit is according to the indication of the described information of carrying in described first message, and the break-through that disconnects described intermediate node connects.
4. method according to claim 1 and 2 is characterized in that, described method also comprises:
The no solicited status of serving as reasons is converted to and switches or bridge status if described APS protection protocol information is indicated described protection path current state, and it is pass-through state that described intermediate node then is set, and/or, unload extra traffic at described intermediate node.
5. method according to claim 1 and 2 is characterized in that, loads after the extra traffic, and described method also comprises:
Expense Cross module to described intermediate node sends second message, and wherein, described second message carries the information of the APS overhead byte passage of the described intermediate node of indication break-through;
Described expense Cross module is according to the indication of the described information of carrying in described second message, the described APS overhead byte of break-through passage.
6. extra traffic loading processing device in the optical transfer network is characterized in that, comprising:
Detecting unit is used to detect the APS protection protocol information in described protection path;
Wherein, described APS protection protocol information comprises: the information of indicating described protection path current state;
Processing unit; be used for indicating described protection path current state for to be converted under the situation of no solicited status by switch status or bridge status at described APS protection protocol information; the break-through that disconnects described intermediate node connects, and/or, load extra traffic at described intermediate node.
7. device according to claim 6 is characterized in that, described processing unit comprises:
Decision-making module is used for determining whether to disconnect according to the information of the described protection of described indication path current state the connection of described intermediate node;
The expense Cross module is used to disconnect the connection of described intermediate node, and loads extra traffic at described intermediate node.
8. device according to claim 7 is characterized in that,
Described decision-making module also is used for determining whether according to the information of the described protection of described indication path current state the connection of the described intermediate node of break-through;
Described expense Cross module also is used for the connection of the described intermediate node of break-through, and at described intermediate node unloading extra traffic.
9. according to claim 7 or 8 described devices, it is characterized in that,
Described expense Cross module also is used for the described APS overhead byte of break-through passage.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910158907.XA CN101944950B (en) | 2009-07-06 | 2009-07-06 | Processing method and device for loading extra service in optical transport network (OTN) |
| PCT/CN2009/073572 WO2011003245A1 (en) | 2009-07-06 | 2009-08-27 | Extra traffic load processing method and apparatus in optical transmission network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910158907.XA CN101944950B (en) | 2009-07-06 | 2009-07-06 | Processing method and device for loading extra service in optical transport network (OTN) |
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| Publication Number | Publication Date |
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| CN101944950A true CN101944950A (en) | 2011-01-12 |
| CN101944950B CN101944950B (en) | 2014-01-01 |
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| CN200910158907.XA Active CN101944950B (en) | 2009-07-06 | 2009-07-06 | Processing method and device for loading extra service in optical transport network (OTN) |
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| WO (1) | WO2011003245A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109889257A (en) * | 2019-01-04 | 2019-06-14 | 烽火通信科技股份有限公司 | A method of realizing that business is two-way disconnected based on OTN expense |
Citations (4)
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| CN1756223A (en) * | 2004-09-28 | 2006-04-05 | 中兴通讯股份有限公司 | Optical transmission looped network rapid protection method |
| CN1883157A (en) * | 2003-09-16 | 2006-12-20 | 北方电讯网络有限公司 | Method and apparatus for providing grades of service for unprotected traffic in an optical network |
| US20070025729A1 (en) * | 2004-12-10 | 2007-02-01 | Chris Barnard | Reconfigurable multichannel (WDM) optical ring network with optical shared protection |
| CN101291191A (en) * | 2008-06-06 | 2008-10-22 | 中兴通讯股份有限公司 | Linear protecting system and method for optical transmitting network |
-
2009
- 2009-07-06 CN CN200910158907.XA patent/CN101944950B/en active Active
- 2009-08-27 WO PCT/CN2009/073572 patent/WO2011003245A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1883157A (en) * | 2003-09-16 | 2006-12-20 | 北方电讯网络有限公司 | Method and apparatus for providing grades of service for unprotected traffic in an optical network |
| CN1756223A (en) * | 2004-09-28 | 2006-04-05 | 中兴通讯股份有限公司 | Optical transmission looped network rapid protection method |
| US20070025729A1 (en) * | 2004-12-10 | 2007-02-01 | Chris Barnard | Reconfigurable multichannel (WDM) optical ring network with optical shared protection |
| CN101291191A (en) * | 2008-06-06 | 2008-10-22 | 中兴通讯股份有限公司 | Linear protecting system and method for optical transmitting network |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109889257A (en) * | 2019-01-04 | 2019-06-14 | 烽火通信科技股份有限公司 | A method of realizing that business is two-way disconnected based on OTN expense |
| CN109889257B (en) * | 2019-01-04 | 2020-05-05 | 烽火通信科技股份有限公司 | Method for realizing service bidirectional interruption based on OTN overhead |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101944950B (en) | 2014-01-01 |
| WO2011003245A1 (en) | 2011-01-13 |
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