CN102868611A - Transmitting method and transmitting device of automatic identification system (AIS) and LCK messages based on segment protection - Google Patents
Transmitting method and transmitting device of automatic identification system (AIS) and LCK messages based on segment protection Download PDFInfo
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- CN102868611A CN102868611A CN2012103785226A CN201210378522A CN102868611A CN 102868611 A CN102868611 A CN 102868611A CN 2012103785226 A CN2012103785226 A CN 2012103785226A CN 201210378522 A CN201210378522 A CN 201210378522A CN 102868611 A CN102868611 A CN 102868611A
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Abstract
The invention discloses a transmitting method and a transmitting device of automatic identification system (AIS) and LCK messages based on segment protection. The transmitting method is characterized in that under segment protection of a multi protocol label switch-transport protocol (MPLS-TP) network, an AIS or CLK is judged whether being triggered by a chosen path, and further the chosen path is judged whether working normally if the AIS or CLK is not triggered by the chosen path; when the AIS is triggered by the chosen path and the chosen path is abnormal in working, a system draws message label information of a transmission path and reversely transmits the message label information on a client layer operation administration and management (OAM); and when the LCK is triggered by the chosen path and the chosen path is abnormal in working, the system draws two-way transmission label information of the transmission path and transmits the two-way transmission label information on the client layer OAM. By adopting the transmitting method and the transmitting device, transmission of AIS and CLK messages of the OAM is achieved under segment protection, and necessary AIS and CLK message transmitting is avoided.
Description
Technical field
The present invention relates to the network communications technology field, relate in particular to a kind of in the MPLS-TP network based on the AIS of segment protect and sending method and the device of LCK message.
Background technology
Along with the development of the communication technology, MPLS-TP (Multi-Protocol Label SwitchingTransport Profile, multiprotocol label switching transmission network standard) becomes main flow direction of transmission network development.The MPLS-TP technology is simplified multiprotocol label switching (MPLS), pseudo-line (MPLS/PW) technology and is transformed; transport network layering, OAM (Operations have been introduced; Administration, andMaintenance) and the concept such as protection, meet the demand of transport network.And protection is as a core topic in the MPLS-TP network; the main reliability guarantee of being responsible for network; in the situation that network breaks down or transmission quality reduces, finish by faulty link and switch the normal service communication of recovery within the shortest time to backup link.
The protection in path mainly is divided into two kinds in the MPLS-TP network; a kind of is to protect end to end; namely use an other Protection path to be used as the protection of operating path, when the path detection of work was out of order, the business of moving on the operating path switched on the Protection path fast and works on.Another kind of then be the protection of point-to-point, namely use an other Protection path to be used as the protection of a certain section link on the operating path, when protected path detection is out of order, then on this section operating path, can realize professional quick switching.
In the MPLS-TP network for the detection of the path failure OAM scheme in mainly adopting Y.1731, the relevant OAM scheme of listing in the MPLS-TP network, needing to support Y.1731.But the protection that occurs point-to-point in the MPLS-TP network is the function point of AIS (Alarm Indication Signal, AIS) and LCK (Locked Signal, locking signal) in then can causing supporting Y.1731.
Summary of the invention
The object of the invention is to overcome the defective of prior art; provide a kind of in the MPLS-TP network based on the AIS of segment protect and sending method and the device of LCK message; being implemented in the MPLS-TP network AIS and the LCK function of supporting Y.1731, and avoid transmission and the transmission of unnecessary AIS and LCK message.
For achieving the above object, the present invention proposes following technical scheme: a kind of sending method of the AIS message based on segment protect comprises:
Judge when the server layer OAM in the MPLS-TP network has triggered the AIS event step of whether having enabled the segment protect of MPLS-TP;
Judge when having enabled segment protect the step whether AIS is triggered by the server layer OAM of selected path;
Judge when AIS is server layer OAM triggering by selected path, not the step that whether works of selected path;
Judge when AIS is server layer OAM triggering by selected path not the step whether selected path works; And
When AIS is triggered and selected path work is not undesired by selected path, and AIS triggers and selected path work when undesired by selected path not, sends the AIS message.
Further, when the server layer OAM in the MPLS-TP network has triggered the AIS event, if do not enable segment protect in the network, then send the AIS message.
When AIS is when being triggered by the server layer OAM of selected path, if selected path normal operation, then trigger link is switched.
When AIS is that server layer OAM by selected path not is when triggering, if the selected path normal operation does not then send the AIS message; If selected path work is undesired or work to occur afterwards undesired, then send the AIS message.
Before the transmission AIS message, by the MPLS label information of AIS message sending module extraction transmission path, encapsulation AIS message is also prepared reverse transmission AIS message on client layer.
The present invention also proposes a kind of dispensing device of the AIS message based on segment protect, comprising:
Segment protect is enabled judge module, is used for judging when the server layer OAM of MPLS-TP network has triggered the AIS event, whether has enabled the segment protect of MPLS-TP;
AIS triggers the path judge module, is used for judging when having enabled segment protect, and whether AIS is triggered by the server layer OAM of selected path;
Selected path condition judgment module not is used for judging whether selected path does not work when AIS is server layer OAM triggering by selected path;
The selected path condition judgment module be used for to judge whether selected path works when AIS is server layer OAM triggering by selected path not; And
AIS message sending module, the MPLS label information and the forward that are used for the extraction transmission path send the AIS message.
Another sending method based on the LCK message of segment protect of the present invention comprises:
Judge when the server layer OAM in the MPLS-TP network has triggered the LCK event step of whether having enabled the segment protect of MPLS-TP;
Judge when having enabled segment protect the step whether LCK is triggered by the server layer OAM of selected path;
Judge when LCK is not server layer OAM triggering by selected path the step whether selected path works; And
When LCK is triggered or selected path work when undesired by selected path, send the LCK message.
Further, when the server layer OAM in the MPLS-TP network has triggered the LCK event, if do not enable segment protect in the network, then send the LCK message.
Before sending the LCK message, extract the forward and reverse MPLS label information of transmission path by LCK message sending module and prepare forward and reverse transmission LCK message.
The present invention proposes again a kind of dispensing device of the LCK message based on segment protect, comprising:
Segment protect is enabled judge module, is used for judging when the server layer OAM of MPLS-TP network has triggered the LCK event, whether has enabled the segment protect of MPLS-TP;
LCK triggers the path judge module, is used for judging when having enabled segment protect, and whether LCK is triggered by the server layer OAM of selected path;
The selected path condition judgment module be used for to judge whether selected path works when LCK is server layer OAM triggering by selected path not; And
LCK message sending module is for the MPLS label information that extracts transmission path and forward and reverse transmission LCK message.
Compared with prior art; disclosed in the MPLS-TP network based on the AIS of segment protect and sending method and the device of LCK message; it has realized the AIS of OAM in the situation of segment protect and the transmission of LCK message, and has avoided the transmission of unnecessary AIS and LCK message.
Description of drawings
Fig. 1 is the schematic diagram that comprises segment protect in the MPLS-TP network of the present invention;
Fig. 2 is the schematic diagram of AIS event when not having segment protect in the MPLS-TP network of the present invention;
Fig. 3 is the flow chart that the AIS message sends when in the MPLS-TP network of the present invention segment protect being set;
Fig. 4 is the module map of AIS packet transmission device of the present invention;
Fig. 5 is the schematic diagram of LCK event when not having segment protect in the MPLS-TP network of the present invention;
Fig. 6 is the flow chart that the LCK message sends when in the MPLS-TP network of the present invention segment protect being set;
Fig. 7 is the module map of LCK packet transmission device of the present invention.
Embodiment
Below in conjunction with accompanying drawing of the present invention, the technical scheme of the embodiment of the invention is carried out clear, complete description.
In the MPLS-TP network as shown in Figure 1; it has network element 1 to the transmission path of network element 4; wherein network element 2 and and network element 3 between transmission path between; be provided with operating path and Protection path; in the situation of network normal operation, by operating path as the transmission path in the network, and when breaking down on the operating path; then Network is switched to Protection path fast, thereby realize Protection path segment protect to operating path on this section link.
The segment protect scheme of MPLS-TP network transfer fermentation is: be bound into a tunnel by operating path and Protection path and come one section transmission path of redundancy backup.Choose an operating path (that is selected path) at some time warps, another then is Protection path (that is not selected path).In elected break down in the path, then starts quick handoff links, and with the AIS among Network such as the OAM, the LCK event switches to not selected path fast, to reach the purpose of service protection.
Fig. 2 is the operation principle schematic diagram of AIS in the MPLS-TP of routine network, server layer OAM and client layer OAM produce common factor at the network element 2 of the network equipment, 2 fooled server layer OAM have triggered the AIS event at network element, system can be with the OAM of this AIS event notice to client layer, and in client layer OAM example, oppositely send the AIS message, be the MPLS label information that system extracts transmission path, encapsulation AIS message also oppositely is sent to network element 1 with the AIS message from network element 2 on client layer OAM.
And when the situation of segment protect appears in the MPLS-TP network, then carry out logic by flow chart shown in Figure 3 to judge that send the AIS message to determine whether needs, thereby reduce the transmission of unnecessary AIS, its concrete deterministic process is as follows:
When the AIS event is triggered; at first judge the segment protect of whether having enabled MPLS-TP in the MPLS-TP network, if do not have, then adopt conventional AIS message transmissions scheme; be the MPLS label information that system extracts transmission path, encapsulation AIS message also oppositely sends on the OAM of client layer.
If enabled the segment protect of MPLS-TP in the MPLS-TP network, judge that then whether AIS is triggered by the server layer OAM of selected path, if, judge then whether selected path is not working properly, if selected path is not working properly, then trigger link is switched, and does not need to send the AIS message; If selected path work is not undesired, then system extracts the label information of transmission path, and encapsulation AIS message also oppositely sends the AIS message on client layer OAM.
If AIS is the AIS event that triggers of selected path not, judge then whether selected path is working properly, if working properly then do not send the AIS message; If selected path work is undesired or selected path work to occur afterwards undesired, then system extracts the MPLS label information of transmission path, and encapsulation AIS message also oppositely sends the AIS message on client layer OAM.Thereby realize specific aim and accuracy that the AIS message sends, also reduce the transmission of unnecessary AIS message.
As shown in Figure 4, the dispensing device of AIS message comprises that segment protect enables judge module, and AIS triggers the path judge module, selected path condition judgment module not, and selected path condition judgment module and AIS message sending module, wherein:
Segment protect is enabled judge module and is used for judging when the server layer OAM of MPLS-TP network has triggered the AIS event whether enabled the segment protect of MPLS-TP;
AIS triggers the path judge module and is used for judging when having enabled segment protect, and whether AIS is triggered by the server layer OAM of selected path;
The selected path condition judgment module be used for not to judge whether selected path does not work when AIS is server layer OAM triggering by selected path;
The selected path condition judgment module be used for to judge whether selected path works when AIS is server layer OAM triggering by selected path not; And
AIS message sending module is used for extracting MPLS label information and the forward transmission AIS message of transmission path.
Fig. 5 is the operation principle schematic diagram of LCK in the MPLS-TP of routine network, server layer OAM and client layer OAM produce at network element 2 and occur simultaneously, when network element 2 fooled server layer OAM have triggered the LCK event, system can be with the OAM of this LCK event notice to client layer, and in client layer OAM example two-way transmission LCK message, it is the transmitted in both directions label information that system extracts transmission path, package LC K message, add the alert label and on the client layer OAM of network element 2 to network element 1, network element 3 and network element 4 both directions send the LCK message.
Fig. 6 is when the situation of segment protect appears in the MPLS-TP network; the logic decision flow chart that the LCK message sends, the network state during by the judgement segment protect determines whether to need to send the AIS message; to reduce the transmission of unnecessary LCK, its concrete deterministic process is as follows:
When the LCK event is triggered; judge at first whether the segment protect in the MPLS-TP network is enabled; if do not have; then adopt conventional LCK message transmissions mode to send; it is the transmitted in both directions label information that system extracts transmission path; package LC K message adds alert label and two-way transmission on client layer OAM.
If enabled segment protect in the MPLS-TP network; judge then whether LCK is triggered by selected path; if; system extracts the reverse label of transmission path; add the alert label and oppositely send the LCK message; and extract the forward label of transmission path forward label and triggering LCK incident path, add alert label forward and send the LCK message.If the LCK event is not to be triggered by selected path, judge then whether selected path is working properly, if so, then do not need to send the LCK message.If selected path or the selected path deviant circumstance occurs afterwards, then system extracts the reverse label of transmission path, add the alert label and oppositely send the LCK message, and extract the forward label of transmission path forward label and triggering LCK incident path, add alert label forward and send the LCK message.
As shown in Figure 7, comprise that based on the dispensing device of the LCK message of segment protect segment protect enables judge module, LCK triggers the path judge module, selected path condition judgment module and LCK message sending module, wherein:
Segment protect is enabled judge module, is used for judging when the server layer OAM of MPLS-TP network has triggered the LCK event, whether has enabled the segment protect of MPLS-TP;
LCK triggers the path judge module, is used for judging when having enabled segment protect, and whether LCK is triggered by the server layer OAM of selected path;
The selected path condition judgment module be used for to judge whether selected path works when LCK is server layer OAM triggering by selected path not; And
LCK message sending module is for the MPLS label information that extracts transmission path and forward and reverse transmission LCK message.
Technology contents of the present invention and technical characterictic have disclosed as above; yet those of ordinary skill in the art still may be based on teaching of the present invention and announcements and are done all replacement and modifications that does not deviate from spirit of the present invention; therefore; protection range of the present invention should be not limited to the content that embodiment discloses; and should comprise various do not deviate from replacement of the present invention and modifications, and contained by the present patent application claim.
Claims (10)
1. sending method based on the AIS message of segment protect is characterized in that comprising:
Judge when the server layer OAM in the MPLS-TP network has triggered the AIS event step of whether having enabled the segment protect of MPLS-TP;
Judge when having enabled segment protect the step whether AIS is triggered by the server layer OAM of selected path;
Judge when AIS is server layer OAM triggering by selected path, not the step that whether works of selected path;
Judge when AIS is server layer OAM triggering by selected path not the step whether selected path works; And
When AIS is triggered and selected path work is not undesired by selected path, and AIS triggers and selected path work when undesired by selected path not, sends the AIS message.
2. method according to claim 1 is characterized in that: when the server layer OAM in the MPLS-TP network has triggered the AIS event, if do not enable segment protect in the network, then send the AIS message.
3. method according to claim 1 is characterized in that: when AIS is server layer OAM by selected path when triggering, if selected path normal operation, then trigger link is switched.
4. method according to claim 1 is characterized in that: when AIS is when the server layer OAM of selected path does not trigger, if the selected path normal operation does not then send the AIS message; If selected path work is undesired or work to occur afterwards undesired, then send the AIS message.
5. according to claim 2 to the described method of 4 any one, it is characterized in that: before the transmission AIS message, by the MPLS label information of AIS message sending module extraction transmission path, encapsulation AIS message is also prepared reverse transmission AIS message on client layer.
6. dispensing device based on the AIS message of segment protect is characterized in that comprising:
Segment protect is enabled judge module, is used for judging when the server layer OAM of MPLS-TP network has triggered the AIS event, whether has enabled the segment protect of MPLS-TP;
AIS triggers the path judge module, is used for judging when having enabled segment protect, and whether AIS is triggered by the server layer OAM of selected path;
Selected path condition judgment module not is used for judging whether selected path does not work when AIS is server layer OAM triggering by selected path;
The selected path condition judgment module be used for to judge whether selected path works when AIS is server layer OAM triggering by selected path not; And
AIS message sending module, the MPLS label information and the forward that are used for the extraction transmission path send the AIS message.
7. sending method based on the LCK message of segment protect is characterized in that comprising:
Judge when the server layer OAM in the MPLS-TP network has triggered the LCK event step of whether having enabled the segment protect of MPLS-TP;
Judge when having enabled segment protect the step whether LCK is triggered by the server layer OAM of selected path;
Judge when LCK is not server layer OAM triggering by selected path the step whether selected path works; And
When LCK is triggered or selected path work when undesired by selected path, send the LCK message.
8. method according to claim 7 is characterized in that: when the server layer OAM in the MPLS-TP network has triggered the LCK event, if do not enable segment protect in the network, then send the LCK message.
9. according to claim 7 or 8 described methods, it is characterized in that: before sending the LCK message, extract the forward and reverse MPLS label information of transmission path by LCK message sending module and prepare forward and reverse transmission LCK message.
10. dispensing device based on the LCK message of segment protect is characterized in that comprising:
Segment protect is enabled judge module, is used for judging when the server layer OAM of MPLS-TP network has triggered the LCK event, whether has enabled the segment protect of MPLS-TP;
LCK triggers the path judge module, is used for judging when having enabled segment protect, and whether LCK is triggered by the server layer OAM of selected path;
The selected path condition judgment module be used for to judge whether selected path works when LCK is server layer OAM triggering by selected path not; And
LCK message sending module is for the MPLS label information that extracts transmission path and forward and reverse transmission LCK message.
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Address after: 215101 unit 13 / 16, 4th floor, building B, No. 5, Xinghan street, Suzhou Industrial Park, Jiangsu Province Patentee after: Suzhou Shengke Communication Co.,Ltd. Address before: 215021 unit 13 / 16, floor 4, building B, No. 5, Xinghan street, industrial park, Suzhou, Jiangsu Province Patentee before: CENTEC NETWORKS (SU ZHOU) Co.,Ltd. |