CN101141212B - Method of protecting virtual cascade/link capability automatic regulation mechanism - Google Patents
Method of protecting virtual cascade/link capability automatic regulation mechanism Download PDFInfo
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- CN101141212B CN101141212B CN2007101438780A CN200710143878A CN101141212B CN 101141212 B CN101141212 B CN 101141212B CN 2007101438780 A CN2007101438780 A CN 2007101438780A CN 200710143878 A CN200710143878 A CN 200710143878A CN 101141212 B CN101141212 B CN 101141212B
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Abstract
The utility model discloses a protection method used for virtual concatenation/link capacity self-correcting mechanism, which comprises the produces as below: the link status of each sink member in VCG is defined as loop back and normal status; also, each sink member is initialized to the normal status; the status examination is needed for each sink member and the link status thereof shall be ascertained; the link status of each sink member in VCG shall be checked, so that the protective treatment can be conducted for the sink member with the changed link status. The utility model solves the VCG /LCAS protection-related problem under time slot loop back. Therefore, VCG/LCAS group will not be influenced by loop back, so as to guarantee the normal transmission as far as possible.
Description
Technical field
The present invention relates to the VCG/LCAS guard method that has time slot loopback in a kind of SDH (Synchronous Digital Hierarchy) (SDH:Synchronous DigitalHierarchy) optical transmission device.
Background technology
Multi-service transport platform (MSTP:Multi-Service TransportPlatform) technology based on SDH has obtained application more and more widely at metropolitan area network, and wherein Virtual Concatenation (Virtual Concatenation) and link capability automatic regulation mechanism (LCAS:Linkcapacity adjustment scheme) are one of cores of MSTP technology.
Virtual cascade group (VCG:Virtual Concatenation Group) realizes the identification and the reorganization of carrying payload by multi-frame indication (MFI:Multi-Frame Indicator) and member's sequence number (SQ:Sequence Indicator).The VCG group membership can be discontinuous, or even is present in different SDH paths.LCAS realizes VCG member's dynamic adjustment by a kind of Handshake Protocol (comprising: CTRL, MST, RS-Ack).
The SDH loopback is opened and is safeguarded by the more equipment that is used for as a kind of debugging method, add that some other factors also may cause SDH time slot passage loopback (as configuration error) to occur, if but loopback appears in the part member of VCG group, can receive two groups of different VCG/LCAS Overhead (may comprise: MFI, SQ, CTRL, MST, RS-Ack) with same VCG/LCAS group occurring, can cause VCG/LCAS group state confusion, make the VCG/LCAS group of part member loopback present some unforeseen results.
In patent application " a kind of method that detects multi-service transport platform appliance services loopback ", utilize the tracking mark in the SDH path overhead to carry business, carry unique channels track sign, by the tracking mark that relatively receives whether with the consistent loopback that quick and precisely detects that sends.After detecting loopback the line side port is carried out corresponding operating, stop data to enter the situation that the method for exchanges data layer can the whole loopbacks of good treatment VCG/LCAS time slot member, situation that but can not good treatment VCG/LCAS time slot member partial loopback.
If the VCG/LCAS group is not handled it to the situation that has part time slot member loopback, may cause that the consequence that some can not be expected appears in MSTP equipment, causes business to cause confusion.On the one hand, need still to guarantee that the loopback channel service can not lead to as far as possible during part time slot member loopback; On the other hand, need take measures to avoid during part time slot member loopback to VCG/LCAS group have a negative impact (as MFI confusion, LCAS state confusion).
Summary of the invention
Owing to the problems referred to above are made the present invention, therefore, the object of the present invention is to provide a kind of guard method of Virtual Concatenation/link capability automatic regulation mechanism.
Guard method according to Virtual Concatenation/link capability automatic regulation mechanism of the present invention may further comprise the steps: the Link State of each the place end member in the virtual cascade group is defined as loopback attitude and normal state, and each place end member is initialized as normal state; Each place end member is carried out state-detection, and determine each place end member's Link State; And virtual cascade group is checked each place end member's Link State; the place end member that Link State is changed protects processing; wherein; the place end member that Link State is changed protects processing to comprise when place end member's state is revised as the loopback attitude by normal state; place end member is set at disarmed state, handles to realize insulation blocking.
In the method, determine that each place end member's Link State comprises when detecting place end member winding, place end member's state is revised as the loopback attitude by normal state.It is to be set at disarmed state by the multi-frame indicating status with place end member to realize that place end member is set at disarmed state.
In addition, in the method, the Link State of determining each place end member comprises when detecting place end member winding and remove, and place end member's state is revised as normal state by the loopback attitude.The place end member that Link State is changed protects processing to comprise when place end member's state is revised as normal state by the loopback attitude, and place end member is removed disarmed state, to realize that protection recovers to handle.It is to realize by place end member's multi-frame indicating status is removed disarmed state that place end member is removed disarmed state.
In addition, in the method, virtual cascade group is enabled the link capability automatic regulation mechanism agreement and is protected processing.
By above-mentioned aspect of the present invention, solved the problem that has VCG/LCAS protection under the time slot loopback situation, protection VCG/LCAS group is not subjected to the influence of loopback, guarantees the transmission of regular traffic as far as possible.
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 shows the flow chart according to the guard method of the Virtual Concatenation/link capability automatic regulation mechanism of the embodiment of the invention;
Fig. 2 shows the schematic diagram of walking the VCG/LCAS networking configuration of different paths according to two members of the embodiment of the invention respectively;
Schematic diagram when Fig. 3 shows VCG/LCAS according to the embodiment of the invention and organizes one of them member path loopback takes place;
Fig. 4 shows the flow chart of handling according to the time slot loopback VCG/LCAS protection of the embodiment of the invention; And
Fig. 5 shows the flow chart according to the time slot loopback VCG/LCAS protection recovery of the embodiment of the invention.
Embodiment
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.
Fig. 1 shows the flow chart according to the guard method of the Virtual Concatenation/link capability automatic regulation mechanism of the embodiment of the invention.Fig. 4 shows the flow chart of handling according to the time slot loopback VCG/LCAS protection of the embodiment of the invention.Fig. 5 shows the flow chart according to the time slot loopback VCG/LCAS protection recovery of the embodiment of the invention.Be described in conjunction with Fig. 1, Fig. 4 and Fig. 5, it may further comprise the steps: step S102 is defined as loopback attitude and normal state with the Link State of each the place end member in the virtual cascade group, and each place end member is initialized as normal state; Step S104 carries out state-detection to each place end member, and determines each place end member's Link State; And step S106, virtual cascade group is checked each place end member's Link State, the place end member that Link State is changed protects processing.
In the method, determine that each place end member's Link State comprises when detecting place end member winding, place end member's state is revised as the loopback attitude by normal state.And protect processing to comprise when place end member's state is revised as the loopback attitude by normal state to the place end member that Link State changes, place end member is set at disarmed state, handle to realize insulation blocking.It is to be set at disarmed state by the multi-frame indicating status with place end member to realize that place end member is set at disarmed state.
In addition, in the method, the Link State of determining each place end member comprises when detecting place end member winding and remove, and place end member's state is revised as normal state by the loopback attitude.The place end member that Link State is changed protects processing to comprise when place end member's state is revised as normal state by the loopback attitude, and place end member is removed disarmed state, to realize that protection recovers to handle.It is to be set at disarmed state by the multi-frame indicating status with place end member to realize that place end member is set at disarmed state.
In addition, in the method, virtual cascade group is enabled the link capability automatic regulation mechanism agreement and is protected processing.
One, initial setting up VCG/LCAS place end member wrapped state is a normal state
Fig. 2 shows the schematic diagram of walking the VCG/LCAS networking configuration of different paths according to two members of the embodiment of the invention respectively.As shown in Figure 2, suppose that this VCG/LCAS group has two members, walks different SDH paths respectively.If take place in the absence of loopback, two members' state is as follows:
VCG/LCAS group membership state under table 1 normal condition
| VCG member's numbering | Member condition | The MFI state |
| ?1 | Normal state | Effectively |
| ?2 | Normal state | Effectively |
Two, the processing when detecting VCG/LCAS member's wrapped state and change
Schematic diagram when Fig. 3 shows VCG/LCAS according to the embodiment of the invention and organizes one of them member path loopback takes place.As shown in Figure 3, supposing that wherein loopback takes place the member in path 2, is the loopback attitude with revising corresponding member condition, and it is disarmed state that while VCG/LCAS group will be forced this member MFI.
VCG/LCAS group membership state under the table 2 loopback situation
| VCG member's numbering | Member condition | The MFI state |
| ?1 | Normal state | Effectively |
| ?2 | The loopback attitude | Invalid |
For MFI disarmed state member, cooperate VCG member management and LCAS control protocol can realize loopback member's isolation.With the LCAS control protocol is example, if force member 2MFI invalid, will carry out the LCAS protection by triggered protocol MSU_L (Member status unavailable, LCAS enabled criteria) state.The LCAS group will be isolated the loopback member, and business is carried on all the other available members.
If member's loopback shown in Figure 3 is removed, will revise corresponding member condition is normal state, and the VCG/LCAS group will be removed MFI and force disarmed state simultaneously.
Table 3 loopback is removed back VCG/LCAS group membership state
| VCG member's numbering | Member condition | The MFI state |
| ?1 | Normal state | Effectively |
| ?2 | Normal state | Effectively |
For the member that MFI recovers effective status, cooperate VCG member management and LCAS control protocol can realize the recovery that the loopback member isolates.With the LCAS control protocol is example, if releasing member 2 forces the MFI disarmed states, will carry out the LCAS recovery by triggered protocol MSU_L removing state, and the LCAS group will be recovered loopback and remove the member, and business is carried on all available members.
In sum, the invention solves the problem that has VCG/LCAS protection under the time slot loopback situation, protection VCG/LCAS group is not subjected to the influence of loopback, guarantees the transmission of regular traffic as far as possible.
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 (7)
1. the guard method of a Virtual Concatenation/link capability automatic regulation mechanism is characterized in that, may further comprise the steps:
The Link State of each place end member in the virtual cascade group is defined as loopback attitude and normal state, and described each place end member is initialized as described normal state;
Described each place end member is carried out state-detection, and determine described each place end member's described Link State; And
Described virtual cascade group is checked described each place end member's described Link State, and the described place end member that described Link State is changed protects processing;
Wherein, the described described place end member that described Link State is changed protects to handle and comprises when described place end member's state is revised as described loopback attitude by described normal state; described place end member is set at disarmed state, handles to realize insulation blocking.
2. guard method according to claim 1; it is characterized in that; describedly determine that described each place end member's described Link State comprises when detecting described place end member winding, described place end member's state is revised as described loopback attitude by described normal state.
3. guard method according to claim 1 is characterized in that, it is to be set at disarmed state by the multi-frame indicating status with described place end member to realize that described place end member is set at disarmed state.
4. guard method according to claim 1; it is characterized in that; describedly determine that described each place end member's described Link State comprises when detecting the end member winding releasing of described place, described place end member's state is revised as described normal state by described loopback attitude.
5. guard method according to claim 4; it is characterized in that; the described described place end member that described Link State is changed protects to handle and comprises when described place end member's state is revised as described normal state by described loopback attitude; described place end member is removed disarmed state, to realize that protection recovers to handle.
6. guard method according to claim 5 is characterized in that, it is to realize by described place end member's multi-frame indicating status is removed disarmed state that described place end member is removed disarmed state.
7. each described guard method in requiring according to aforesaid right is characterized in that, described virtual cascade group is enabled described link capability automatic regulation mechanism agreement and carried out described protection processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101438780A CN101141212B (en) | 2007-08-03 | 2007-08-03 | Method of protecting virtual cascade/link capability automatic regulation mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101438780A CN101141212B (en) | 2007-08-03 | 2007-08-03 | Method of protecting virtual cascade/link capability automatic regulation mechanism |
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| CN101141212A CN101141212A (en) | 2008-03-12 |
| CN101141212B true CN101141212B (en) | 2011-03-02 |
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| CN2007101438780A Expired - Fee Related CN101141212B (en) | 2007-08-03 | 2007-08-03 | Method of protecting virtual cascade/link capability automatic regulation mechanism |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102332997B (en) * | 2011-10-25 | 2014-06-25 | 瑞斯康达科技发展股份有限公司 | Network equipment and method for adjusting link capacity by using network equipment |
| CN106375107B (en) * | 2016-08-15 | 2019-07-26 | 瑞斯康达科技发展股份有限公司 | A kind of data reconstruction method and device of Virtual Concatenation |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1581759A (en) * | 2003-08-12 | 2005-02-16 | 华为技术有限公司 | Intermediate error code real-time positioning method |
| CN1734991A (en) * | 2004-08-13 | 2006-02-15 | 中兴通讯股份有限公司 | A method for detecting service loopback of multi-service transmission platform equipment |
| CN1859411A (en) * | 2006-03-18 | 2006-11-08 | 华为技术有限公司 | Method for detecting communication device link ringback and communication device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1581759A (en) * | 2003-08-12 | 2005-02-16 | 华为技术有限公司 | Intermediate error code real-time positioning method |
| CN1734991A (en) * | 2004-08-13 | 2006-02-15 | 中兴通讯股份有限公司 | A method for detecting service loopback of multi-service transmission platform equipment |
| CN1859411A (en) * | 2006-03-18 | 2006-11-08 | 华为技术有限公司 | Method for detecting communication device link ringback and communication device |
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| CN101141212A (en) | 2008-03-12 |
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Granted publication date: 20110302 Termination date: 20170803 |