CN104202184A - Quick service switchover method and device - Google Patents
Quick service switchover method and device Download PDFInfo
- Publication number
- CN104202184A CN104202184A CN201410418381.5A CN201410418381A CN104202184A CN 104202184 A CN104202184 A CN 104202184A CN 201410418381 A CN201410418381 A CN 201410418381A CN 104202184 A CN104202184 A CN 104202184A
- Authority
- CN
- China
- Prior art keywords
- wtr
- local terminal
- mpls
- status indicator
- opposite end
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
An embodiment of the invention discloses a quick service switchover method and device and relates to the technical field of communication. The quick service switchover method and device can improve the network reliability and self-curing capability. The quick service switchover method comprises starting WTR (Wait To Restore) to time when an edge router in a home terminal IP (Internet Protocol) /MPLS (Multi-Protocol Label Switching) area determines an access which is formed by a home terminal main path and a main SDH link is recovered; generating into a first WTR state ID (Identity) according to a WTR state of the edge router in a home terminal IP/MPLS area and sending a first notification message to an edge router of an opposite terminal IP/MPLS; receiving a second notification message sent by the edge router of the opposite terminal IP/MPLS; detecting whether the first WTR state ID and a second WTR state ID are WTR ending IDs or not; switching from a home terminal backup path to a home terminal main path if the first WTR state ID and a second WTR state ID are WTR ending IDs. The quick service switchover method is applicable to quick service switchover scenes.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of method and apparatus of quick switchback business.
Background technology
Along with the development of the network communications technology, business is constantly carried on the network of subregion with the form of CES (Circuit Emulation Service, circuit emulation service).
CES can be applied to subregion IP (Internet Protocol, the agreement interconnecting between network)/MPLS (Multi-Protocol Label Switching, multiprotocol label switching) and in SDH (Synchronous Digital Hierarchy, SDH (Synchronous Digital Hierarchy)) mixed networking.Wherein, in IP/MPLS, set up PW (Pseudo Wire, pseudo-line) as the active/standby path of using, between IP/MPLS, pass through SDH link connection.In the region of main path, (fringe node that does not comprise region) breaks down; or interregional SDH primary link breaks down; or link PE (the Edge Router in region; edge router) node; when the router being connected with SDH primary link breaks down; cause two end regions cannot pass through main path and the SDH primary link in region separately and carry out CES; the protection that meeting trigger network carries out PW redundancy to CES is switched; be about to CES and be switched to backup path from main path, thereby business is normally forwarded.
In the prior art, in the situation that the link PE node in interregional primary link or region breaks down, after the fault recovery of main path, because WTR (Wait to Restore) the duration difference of timing or the starting point of timing of zones of different PE are different, make CES start the time point difference of switchback, the first switchback of one side of WTR FEFO is to main path, and the opposing party's WTR not yet finishes, CES is also on backup path, only have when the opposing party's WTR finish and CES switchback after main path, CES could recover again, but the time that the CES in both sides region starts to be separated by between the time point of switchback may be far longer than the stipulated time of switchback, cause the temporary interruption of the transfer of data generation long period of CES, in the long period of the temporary interruption of transfer of data of CES, cannot realize the transmission of data, thereby reliability and the self-healing ability of network have been reduced.
Summary of the invention
Embodiments of the invention provide a kind of method and apparatus of quick switchback business, can improve reliability and the self-healing ability of network.
For achieving the above object, embodiments of the invention adopt following technical scheme:
On the one hand, the embodiment of the present invention provides a kind of method of quick switchback business, for procotol/multiprotocol label switching IP/MPLS and SDH (Synchronous Digital Hierarchy) SDH mixed networking, described IP/MPLS and SDH mixed networking comprise local terminal IP/MPLS region and IP/MPLS region, opposite end, described local terminal IP/MPLS region comprises local terminal main path and local terminal backup path, IP/MPLS region, described opposite end comprises opposite end main path and opposite end backup path, and described local terminal IP/MPLS region and IP/MPLS region, described opposite end are by main SDH link or standby SDH link connection; When the path of described local terminal main path, described main SDH link composition occurs to interrupt, service data interaction is carried out by described local terminal backup path and described opposite end backup path in described local terminal IP/MPLS region and IP/MPLS region, described opposite end; Described method comprises:
When the edge router in described local terminal IP/MPLS region determines that the path recovery of described local terminal main path, described main SDH link composition is communicated with, start and recover to wait for WTR timing;
Obtain the WTR state of the edge router in described local terminal IP/MPLS region, according to the WTR state of the edge router in described local terminal IP/MPLS region, generate a WTR status indicator, and send the first notice message to the edge router in IP/MPLS region, described opposite end, described the first notice message comprises a WTR status indicator, a described WTR status indicator is corresponding with the edge router in described local terminal IP/MPLS region, and a described WTR status indicator comprises that WTR does not finish sign or WTR finishes sign;
Receive the second notice message of the edge router transmission in IP/MPLS region, opposite end, described the second notice message comprises the 2nd WTR status indicator, described the 2nd WTR status indicator is corresponding with the edge router in IP/MPLS region, described opposite end, and described the 2nd WTR status indicator comprises that WTR does not finish sign or WTR finishes sign;
Detect a described WTR status indicator and described the 2nd WTR status indicator whether be described WTR finish sign;
If a described WTR status indicator and described the 2nd WTR status indicator are described WTR, finish sign, described business datum is transmitted from described local terminal backup path switchback to described local terminal main path.
On the other hand, the embodiment of the present invention provides a kind of device of quick switchback business, for procotol/multiprotocol label switching IP/MPLS and SDH (Synchronous Digital Hierarchy) SDH mixed networking, described IP/MPLS and SDH mixed networking comprise local terminal IP/MPLS region and IP/MPLS region, opposite end, described local terminal IP/MPLS region comprises local terminal main path and local terminal backup path, IP/MPLS region, described opposite end comprises opposite end main path and opposite end backup path, and described local terminal IP/MPLS region and IP/MPLS region, described opposite end are by main SDH link or standby SDH link connection; When the path of described local terminal main path, described main SDH link composition occurs to interrupt, service data interaction is carried out by described local terminal backup path and described opposite end backup path in described local terminal IP/MPLS region and IP/MPLS region, described opposite end; Described device comprises:
Timing module, for when determining the path recovery connection that described local terminal main path, described main SDH link form, starts and recovers to wait for WTR timing;
Message sending module, for obtaining the WTR state of the edge router in described local terminal IP/MPLS region, according to the WTR state of the edge router in described local terminal IP/MPLS region, generate a WTR status indicator, and send the first notice message to the edge router in IP/MPLS region, described opposite end, described the first notice message comprises a WTR status indicator, a described WTR status indicator is corresponding with the edge router in described local terminal IP/MPLS region, and a described WTR status indicator comprises that WTR does not finish sign or WTR finishes sign;
Message receiver module, the the second notice message sending for receiving the edge router in IP/MPLS region, opposite end, described the second notice message comprises the 2nd WTR status indicator, described the 2nd WTR status indicator is corresponding with the edge router in IP/MPLS region, described opposite end, and described the 2nd WTR status indicator comprises that WTR does not finish sign or WTR finishes sign;
Whether label detection module, be described WTR for detection of a described WTR status indicator and described the 2nd WTR status indicator and finish sign;
Switchback determination module, while finishing to identify for being described WTR when a described WTR status indicator and described the 2nd WTR status indicator, transmits described business datum from described local terminal backup path switchback to described local terminal main path.
The method and apparatus of a kind of quick switchback business that the embodiment of the present invention provides, and be applied in IP/MPLS and SDH mixed networking.According to the WTR state of the edge router in local terminal IP/MPLS region, generate a WTR status indicator, and send the first notice message to the edge router in IP/MPLS region, opposite end, receive the second notice message of the edge router transmission in IP/MPLS region, opposite end, when the WTR status indicator in the first notice message and the two WTR status indicator of the second notice in message are WTR and finish to identify, business datum is transmitted from local terminal backup path switchback to local terminal main path.The prior art that temporary interruption occurs from the transfer of data that starts the different CES of causing of time point of switchback because of CES is compared, this programme is by waiting for to after finishing the PE of WTR after end regions and finishing the PE of this end regions FEFO WTR, carry out again the method for CES switchback, make two CES in region can realize quick switchback, and, the time that makes this end regions and end regions is started to be separated by between the time point of switchback is less than the stipulated time of switchback, solved the problem of the temporary interruption of the transfer of data generation long period of CES in prior art, thereby reliability and the self-healing ability of network have been improved.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, to the accompanying drawing of required use in embodiment be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
A kind of IP/MPLS that Fig. 1 provides for the embodiment of the present invention and the configuration diagram of SDH mixed networking;
The flow chart of the method for a kind of quick switchback business that Fig. 2 provides for the embodiment of the present invention;
The flow chart of a kind of specific implementation of the method for a kind of quick switchback business that Fig. 3 provides for the embodiment of the present invention;
The flow chart of the another kind of specific implementation of the method for a kind of quick switchback business that Fig. 4 provides for the embodiment of the present invention;
The structural representation of the device of a kind of quick switchback business that Fig. 5 provides for the embodiment of the present invention;
The structural representation of a kind of specific implementation of the device of a kind of quick switchback business that Fig. 6 provides for the embodiment of the present invention;
The structural representation of the another kind of specific implementation of the device of a kind of quick switchback business that Fig. 7 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making all other embodiment that obtain under creative work prerequisite, belong to the scope of protection of the invention.
The technical scheme that the embodiment of the present invention provides is applied to subregion IP (Internet Protocol, the agreement interconnecting between network)/MPLS (Multi-Protocol Label Switching, multiprotocol label switching) and SDH (Synchronous Digital Hierarchy, SDH (Synchronous Digital Hierarchy)) in mixed networking, in embodiments of the present invention, as shown in Figure 1, region A and region B are IP/MPLS network, between region A and region B, with STM-1 port, connect.Wherein, STM-1 is the interface of SDH network.In the A of region, on main path, between PE1 and PE2, use IP/MPLS equipment connection, wherein, IP/MPLS equipment can be intermediate router, on backup path, between PE1 and PE5, also use IP/MPLS equipment connection, between PE2 and PE5, with GE (Gigabit Ethernet, gigabit Ethernet), connect; In the B of region, on main path, between PE3 and PE4, use IP/MPLS equipment connection, on backup path, between PE4 and PE6, also use IP/MPLS equipment connection, between PE3 and PE6, with GE, connect; PE2 is connected by the STM-1 of main SDH link with PE3, and PE5 is connected by the STM-1 of standby SDH link with PE6.Wherein, PE2, PE3, PE5 and PE6 are link PE.
The embodiment of the present invention provides a kind of method of quick switchback business, for procotol/multiprotocol label switching IP/MPLS and SDH (Synchronous Digital Hierarchy) SDH mixed networking, IP/MPLS and SDH mixed networking comprise local terminal IP/MPLS region and IP/MPLS region, opposite end, local terminal IP/MPLS region comprises local terminal main path and local terminal backup path, IP/MPLS region, opposite end comprises opposite end main path and opposite end backup path, and local terminal IP/MPLS region and IP/MPLS region, opposite end are by main SDH link or standby SDH link connection; When the path of local terminal main path, main SDH link composition occurs to interrupt, service data interaction is carried out by local terminal backup path and opposite end backup path in local terminal IP/MPLS region and IP/MPLS region, opposite end; When the path recovery of local terminal main path, main SDH link composition is communicated with, as shown in Figure 2, comprising:
101, when the edge router in described local terminal IP/MPLS region determines that the path recovery of described local terminal main path, described main SDH link composition is communicated with, start and recover to wait for WTR timing.
Wherein, when the edge router in local terminal IP/MPLS region is determined after the path recovery of local terminal main path, main SDH link composition, WTR (Wait to Restore recovers to wait for) starts timing.Wherein, specifically arranging of WTR can obtain according to network settings.
Wherein, when the link router the breaking down recovery in this end regions or the primary link breaking down recover, because the link router of this end regions is directly connected by primary link with the link router to end regions, so the primary link Interface status of the link router of this end regions is normal condition, simultaneously, the link router of this end regions is normal message to the edge router transmission session status of this end regions, after the edge router of this end regions receives session status and is normal message, determine local terminal main path, the path recovery that main SDH link forms is communicated with, thereby the WTR that triggers the edge router of this end regions starts timing.Local terminal is relative with opposite end, so also can determine that the path recovery that opposite end main path, main SDH link form is communicated with, and also starts timing to the WTR of the edge router of end regions.
For example, as shown in Figure 1, when the PE2 breaking down recovers, because PE2 and PE3 are directly by STM-1 (Synchronous Transfer Module-1, synchronous transfer mode-1) link connection, so the recovery of PE2 can make the STM-1 Interface status Up of PE3, between PE2 and PE3, recover to be communicated with, simultaneously, PE2 sends to PE1 the message that session status is Up, PE1 receives after the message that session status is Up, determine that the path that PE1, PE2, STM-1 form is communicated with, thereby the WTR of triggering PE1 starts timing.When the STM-1 Interface status of PE3 is Up, PE3 sends to PE4 the message that session status is Up, and PE4 receives after the message that session status is Up, determine that the path that STM-1, PE3, PE4 form is communicated with, thereby the WTR of triggering PE4 starts timing.Wherein, Up represents normal condition.
And for example, as shown in Figure 1, when the STM-1 breaking down recovers, because PE2 is directly connected by STM-1 with PE3, so the STM-1 Interface status of PE2 is Up, the Interface status of the STM-1 of PE3 is also Up, be between PE2 and PE3, to recover to be communicated with, meanwhile, PE2 sends to PE1 the message that session status is Up, and PE3 sends to PE4 the message that session status is Up.PE1 receives after the message that session status is Up, determine that the path that PE1, PE2, STM-1 form is communicated with, thereby the WTR of triggering PE1 starts timing; PE4 receives after the message that session status is Up, determine that the path that STM-1, PE3, PE4 form is communicated with, thereby the WTR of triggering PE4 starts timing.Wherein, Up represents normal condition.
PE3 fault recovery confirms that the method being communicated with is identical with the method that PE2 fault recovery confirmation is communicated with, repeat no more herein, and the message of mentioning in above-mentioned example can be BFD for PW (Bidirectional Forwarding Detection for Pseudo Wire, for the two-way converting detection of pseudo-line) message.
102, obtain the WTR state of the edge router in described local terminal IP/MPLS region, according to the WTR state of the edge router in described local terminal IP/MPLS region, generate a WTR status indicator, and send the first notice message to the edge router in IP/MPLS region, described opposite end.
Wherein, the first notice message comprises a WTR status indicator, and a WTR status indicator is corresponding with the edge router in local terminal IP/MPLS region, and a WTR status indicator represents the WTR state of the edge router in current local terminal IP/MPLS region.The one WTR status indicator comprises that WTR does not finish sign or WTR finishes sign.In specific implementation process, the first notice message comprises message after BFD for PW message is expanded and to the expense after the expansion of STM-1 frame overhead.Wherein, to the expansion of BFD for PW message, be that the TLV that carries WTR ending message by interpolation realizes, to the expansion of STM-1 frame overhead, be that the expense of carrying WTR ending message by interpolation realizes.WTR does not finish sign and represents that WTR timing does not finish, and can represent with WTR=0, and WTR finishes sign and represents that WTR timing finishes, and can represent with WTR=1.
Concrete, the edge router in local terminal IP/MPLS region sends and comprises WTR after expansion and do not finish the BFD for PW message that sign or WTR finish sign to the edge router that links being connected with STM-1 in local terminal IP/MPLS region, the edge router that links being connected with STM-1 in local terminal IP/MPLS region sends and comprises WTR after expansion and do not finish the STM-1 frame overhead that sign or WTR finish sign to the edge router that links being connected with STM-1 in IP/MPLS region, opposite end, the edge router that links being connected with STM-1 in IP/MPLS region, opposite end does not finish to comprising WTR after the edge router in IP/MPLS region, opposite end sends expansion the BFD for PW message that sign or WTR finish sign.For example, as shown in Figure 1, PE1 does not finish to comprising WTR after PE2 sends expansion the BFD for PW message that sign or WTR finish sign, PE2 does not finish to comprising WTR after PE3 sends expansion the STM-1 frame overhead that sign or WTR finish sign, and PE3 does not finish to comprising WTR after PE4 sends expansion the BFD for PW message that sign or WTR finish sign.
103, the second notice message that the edge router in reception IP/MPLS region, opposite end sends.
Wherein, the second notice message comprises the 2nd WTR status indicator, and the 2nd WTR status indicator is corresponding with the edge router in IP/MPLS region, opposite end, and the 2nd WTR status indicator represents the WTR state of the edge router in IP/MPLS region, current opposite end.The 2nd WTR status indicator comprises that WTR does not finish sign or WTR finishes sign.In specific implementation process, the first notice message comprises message after BFD for PW message is expanded and to the expense after the expansion of STM-1 frame overhead.Wherein, BFD for PW message through local terminal be connected with STM-1 link edge router decapsulation after form STM-1 frame, STM-1 frame again through opposite end be connected with STM-1 link and after edge router heavily encapsulates, form BFD for PW message.WTR does not finish sign and represents that WTR timing does not finish, and can represent with WTR=0, and WTR finishes sign and represents that WTR timing finishes, and can represent with WTR=1.
Concrete, opposite end edge router obtains the WTR state of edge router, according to the WTR state of the edge router of opposite end, generates the 2nd WTR status indicator, and sends the second notice message to local terminal route.Wherein, the edge router in IP/MPLS region, opposite end sends and comprises WTR after expansion and do not finish the BFD for PW message that sign or WTR finish sign to the edge router that links being connected with STM-1 in IP/MPLS region, opposite end, the edge router that links being connected with STM-1 in IP/MPLS region, opposite end sends and comprises WTR after expansion and do not finish the STM-1 frame overhead that sign or WTR finish sign to the edge router that links being connected with STM-1 in local terminal IP/MPLS region, the edge router that links being connected with STM-1 in local terminal IP/MPLS region does not finish to comprising WTR after the edge router in local terminal IP/MPLS region sends expansion the BFD for PW message that sign or WTR finish sign.For example, as shown in Figure 1, PE4 sends the BFD for PW message after expansion to PE3, PE3 does not finish to comprising WTR after PE2 sends expansion the STM-1 frame overhead that sign or WTR finish sign, PE2 does not finish to comprising WTR after PE1 sends expansion the BFD for PW message that sign or WTR finish sign, and PE1 receives the second notice message that PE4 sends.
Wherein, local terminal is relative with opposite end, and for example, as shown in Figure 1, if region A is local terminal, region B is opposite end; If region B is local terminal, region A is opposite end.
104, detect a described WTR status indicator and described the 2nd WTR status indicator whether be described WTR finish sign.
Wherein, when the edge router of this end regions receives after the second notice message that the edge router of end regions is sent, the edge router of this end regions detect the WTR status indicator in the first notice message sending recently and the second notice message of receiving recently in the 2nd WTR status indicator whether be WTR and finish sign.
105, if being described WTR, a described WTR status indicator and described the 2nd WTR status indicator finish sign, described business datum is transmitted from described local terminal backup path switchback to described local terminal main path.
Wherein, whether business datum carries out switchback, need to judge by a WTR status indicator and the 2nd WTR status indicator, if a WTR status indicator and the 2nd WTR status indicator are WTR, finish sign, business datum be transmitted from local terminal backup path switchback to local terminal main path.
For example, when a WTR status indicator and the 2nd WTR status indicator all use 0,1 to represent, and 0 represents not finish, when 1 expression has finished, if being WTR, a WTR status indicator and the 2nd WTR status indicator finish sign, the WTR of a WTR status indicator and the 2nd WTR status indicator finish sign be 1, business datum is transmitted from local terminal backup path switchback to local terminal main path.Owing to transmitting time and the interregional time by SDH link transmission message of IP/MPLS of message between the router in IP/MPLS region, can ignore, and much smaller than 50ms, so business can complete switchback in official hour.
In specific implementation process, as shown in Figure 1, if a WTR status indicator is that WTR finishes sign in the first notice message that PE1 sends to PE4, be WTR=1, and PE1 receives the 2nd WTR status indicator in the second notice message that PE4 sends also for WTR finishes to identify, i.e. WTR=1, business is in the A of region, from backup path, be switched to main path, the path from PE1 to PE5 is switched to PE1 to the path of PE2.
The method of a kind of quick switchback business that the embodiment of the present invention provides, and be applied in IP/MPLS and SDH mixed networking.According to the WTR state of the edge router in local terminal IP/MPLS region, generate a WTR status indicator, and send the first notice message to the edge router in IP/MPLS region, opposite end, receive the second notice message of the edge router transmission in IP/MPLS region, opposite end, when the WTR status indicator in the first notice message and the two WTR status indicator of the second notice in message are WTR and finish to identify, business datum is transmitted from local terminal backup path switchback to local terminal main path.The prior art that temporary interruption occurs from the transfer of data that starts the different CES of causing of time point of switchback because of CES is compared, this programme is by waiting for to after finishing the PE of WTR after end regions and finishing the PE of this end regions FEFO WTR, carry out again the method for CES switchback, make two CES in region can realize quick switchback, and, the time that makes this end regions and end regions is started to be separated by between the time point of switchback is less than the stipulated time of switchback, solved the problem of the temporary interruption of the transfer of data generation long period of CES in prior art, thereby reliability and the self-healing ability of network have been improved.
Further, on the basis of the scheme shown in Fig. 2, the embodiment of the present invention also provides a kind of concrete scheme of method of quick switchback business, and this programme can also increase 106 in the scheme shown in Fig. 2, as shown in Figure 3, comprising:
101, when the edge router in described local terminal IP/MPLS region determines that the path recovery of described local terminal main path, described main SDH link composition is communicated with, start and recover to wait for WTR timing.
102, obtain the WTR state of the edge router in described local terminal IP/MPLS region, according to the WTR state of the edge router in described local terminal IP/MPLS region, generate a WTR status indicator, and send the first notice message to the edge router in IP/MPLS region, described opposite end.
Wherein, the edge router of this end regions periodically sends the first notice message to the edge router to end regions.For example: in IP/MPLS region, the transmitting-receiving time interval of BFD for PW amplifying message is 10ms, the edge router of this end regions be take 10ms as the cycle is to edge router transmission the first notice message to end regions.
103, the second notice message that the edge router in reception IP/MPLS region, opposite end sends.
Wherein, the edge router of end regions is periodically sent to the second notice message to the edge router of this end regions.For example: in IP/MPLS region, the transmitting-receiving time interval of BFD for PW amplifying message is 10ms, the edge router of end regions be take to the edge router of 10ms as the cycle to this end regions and send the second notice message.
104, detect a described WTR status indicator and described the 2nd WTR status indicator whether be described WTR finish sign.
105, if being described WTR, a described WTR status indicator and described the 2nd WTR status indicator finish sign, described business datum is transmitted from described local terminal backup path switchback to described local terminal main path.
106, when a described WTR status indicator and described the 2nd WTR status indicator are not described WTR and finish to identify, keep business datum to transmit at described local terminal backup path.
Wherein, when a WTR status indicator and the 2nd WTR status indicator are not WTR and finish to identify, the one WTR status indicator or the 2nd WTR status indicator are that WTR does not finish sign, illustrate that the WTR timing in local terminal or opposite end does not finish, thereby enter transition condition, keep business datum to transmit at local terminal backup path.
In specific implementation process, as shown in Figure 1, if being WTR, the WTR status indicator in a-quadrant finishes sign, and a-quadrant receive the 2nd WTR status indicator in B region be WTR do not finish sign, illustrate that the timing of the WTR in B region does not also finish, so the timing of B region will be continued to wait in a-quadrant, and business still transmits on backup path, at PE1, arrive PE5, PE5 is to PE6, and E6 transmits to the path of PE4.
The method of a kind of quick switchback business that the embodiment of the present invention provides, and be applied in IP/MPLS and SDH mixed networking.According to the WTR state of the edge router in local terminal IP/MPLS region, generate a WTR status indicator, and send the first notice message to the edge router in IP/MPLS region, opposite end, receive the second notice message of the edge router transmission in IP/MPLS region, opposite end, when the WTR status indicator in the first notice message and the two WTR status indicator of the second notice in message are WTR and finish to identify, business datum is transmitted from local terminal backup path switchback to local terminal main path.The prior art that temporary interruption occurs from the transfer of data that starts the different CES of causing of time point of switchback because of CES is compared, this programme is by waiting for to after finishing the PE of WTR after end regions and finishing the PE of this end regions FEFO WTR, carry out again the method for CES switchback, make two CES in region can realize quick switchback, and, the time that makes this end regions and end regions is started to be separated by between the time point of switchback is less than the stipulated time of switchback, solved the problem of the temporary interruption of the transfer of data generation long period of CES in prior art, thereby reliability and the self-healing ability of network have been improved.By increasing WTR status indicator, learn local terminal the one WTR status indicator and opposite end the 2nd WTR status indicator, when local terminal the one WTR status indicator and opposite end the 2nd WTR status indicator are not WTR and finish to identify, the transmission of business enters transition condition, thereby keep business datum to transmit at local terminal backup path, and then make business datum can continue transmission, and the phenomenon of having avoided business data transmission to interrupt.
Further, on the basis of the scheme shown in Fig. 3, the embodiment of the present invention also provides a kind of concrete scheme of method of quick switchback business, the implementation further refinement of this programme to 102 in the scheme shown in Fig. 3, wherein, 102 can specific implementation be 1021, as shown in Figure 4, comprising:
101, when the edge router in described local terminal IP/MPLS region determines that the path recovery of described local terminal main path, described main SDH link composition is communicated with, start and recover to wait for WTR timing.
1021, obtain the WTR state of the edge router in described local terminal IP/MPLS region, according to the WTR state of the edge router in described local terminal IP/MPLS region, generate a WTR status indicator, by described local terminal main path, described main SDH link and described opposite end main path, to the edge router transmission first notice message in IP/MPLS region, described opposite end.
Wherein, because being communicated with, recovers main path, thus can pass through local terminal main path, main SDH link and opposite end main path, to the edge router transmission first notice message in IP/MPLS region, opposite end.Main SDH link comprises isl frame expense, isl frame expense comprise WTR do not finish sign or WTR finish sign.In specific implementation process, isl frame expense can be STM-1 frame overhead.
For example, as shown in Figure 1, when main path is communicated with recovery, PE1 can be directly finish to comprising WTR after PE2 sends expansion the BFD for PW message that sign or WTR finish sign, PE2 does not finish to comprising WTR after PE3 sends expansion the STM-1 frame overhead that sign or WTR finish sign again, to comprising after PE4 sends expansion, WTR does not finish sign to PE3 or WTR finishes the BFD for PW message of sign again, thereby complete PE1, to PE4, sends the first notice message.
103, the second notice message that the edge router in reception IP/MPLS region, opposite end sends.
Wherein, the edge router in opposite end IP/MPLS region sends the second notice message through opposite end main path, main SDH link, local terminal main path to the edge router in local terminal IP/MPLS region.
104, detect a described WTR status indicator and described the 2nd WTR status indicator whether be described WTR finish sign.
105, if being described WTR, a described WTR status indicator and described the 2nd WTR status indicator finish sign, described business datum is transmitted from described local terminal backup path switchback to described local terminal main path.
106, when a described WTR status indicator and described the 2nd WTR status indicator are not described WTR and finish to identify, keep business datum to transmit at described local terminal backup path.
The method of a kind of quick switchback business that the embodiment of the present invention provides, and be applied in IP/MPLS and SDH mixed networking.According to the WTR state of the edge router in local terminal IP/MPLS region, generate a WTR status indicator, and send the first notice message to the edge router in IP/MPLS region, opposite end, receive the second notice message of the edge router transmission in IP/MPLS region, opposite end, when the WTR status indicator in the first notice message and the two WTR status indicator of the second notice in message are WTR and finish to identify, business datum is transmitted from local terminal backup path switchback to local terminal main path.The prior art that temporary interruption occurs from the transfer of data that starts the different CES of causing of time point of switchback because of CES is compared, this programme is by waiting for to after finishing the PE of WTR after end regions and finishing the PE of this end regions FEFO WTR, carry out again the method for CES switchback, make two CES in region can realize quick switchback, and, the time that makes this end regions and end regions is started to be separated by between the time point of switchback is less than the stipulated time of switchback, solved the problem of the temporary interruption of the transfer of data generation long period of CES in prior art, thereby reliability and the self-healing ability of network have been improved.This programme utilizes main path to be communicated with the function of recovering to transmit message, by local terminal, receives the second notice message that carries the 2nd WTR status indicator that send opposite end, realizes the detection to opposite end WTR ending message.
The embodiment of the present invention provides a kind of device 200 of quick switchback business, for procotol/multiprotocol label switching IP/MPLS and SDH (Synchronous Digital Hierarchy) SDH mixed networking, IP/MPLS and SDH mixed networking comprise local terminal IP/MPLS region and IP/MPLS region, opposite end, local terminal IP/MPLS region comprises local terminal main path and local terminal backup path, IP/MPLS region, opposite end comprises opposite end main path and opposite end backup path, and local terminal IP/MPLS region and IP/MPLS region, opposite end are by main SDH link or standby SDH link connection; When the path of local terminal main path, main SDH link composition occurs to interrupt, service data interaction is carried out by local terminal backup path and opposite end backup path in local terminal IP/MPLS region and IP/MPLS region, opposite end; When the path recovery of local terminal main path, main SDH link composition is communicated with, as shown in Figure 5, device 200 comprises:
Timing module 201, for when determining the path recovery connection that described local terminal main path, described main SDH link form, starts and recovers to wait for WTR timing.
Message sending module 202, for obtaining the WTR state of the edge router in described local terminal IP/MPLS region, according to the WTR state of the edge router in described local terminal IP/MPLS region, generate a WTR status indicator, and send the first notice message to the edge router in IP/MPLS region, described opposite end.
Wherein, the first notice message comprises a WTR status indicator, and a WTR status indicator is corresponding with the edge router in local terminal IP/MPLS region, and a WTR status indicator represents the WTR state of the edge router in current local terminal IP/MPLS region.The one WTR status indicator comprises that WTR does not finish sign or WTR finishes sign.
Message receiver module 203, the second notice message sending for receiving the edge router in IP/MPLS region, opposite end.
Wherein, the second notice message comprises the 2nd WTR status indicator, and the 2nd WTR status indicator is corresponding with the edge router in IP/MPLS region, opposite end, and the 2nd WTR status indicator represents the WTR state of the edge router in IP/MPLS region, current opposite end.The 2nd WTR status indicator comprises that WTR does not finish sign or WTR finishes sign.
Whether label detection module 204, be described WTR for detection of a described WTR status indicator and described the 2nd WTR status indicator and finish sign.
Switchback determination module 205, while finishing to identify for being described WTR when a described WTR status indicator and described the 2nd WTR status indicator, transmits described business datum from described local terminal backup path switchback to described local terminal main path.
The device of a kind of quick switchback business that the embodiment of the present invention provides, and be applied in IP/MPLS and SDH mixed networking.According to the WTR state of the edge router in local terminal IP/MPLS region, generate a WTR status indicator, and send the first notice message to the edge router in IP/MPLS region, opposite end, receive the second notice message of the edge router transmission in IP/MPLS region, opposite end, when the WTR status indicator in the first notice message and the two WTR status indicator of the second notice in message are WTR and finish to identify, business datum is transmitted from local terminal backup path switchback to local terminal main path.The prior art that temporary interruption occurs from the transfer of data that starts the different CES of causing of time point of switchback because of CES is compared, this programme is by waiting for to after finishing the PE of WTR after end regions and finishing the PE of this end regions FEFO WTR, carry out again the method for CES switchback, make two CES in region can realize quick switchback, and, the time that makes this end regions and end regions is started to be separated by between the time point of switchback is less than the stipulated time of switchback, solved the problem of the temporary interruption of the transfer of data generation long period of CES in prior art, thereby reliability and the self-healing ability of network have been improved.
Further, as shown in Figure 6, device 200 also comprises:
Business keeps module 206, and while finishing to identify for not being described WTR when a described WTR status indicator and described the 2nd WTR status indicator, maintenance business datum is transmitted at described local terminal backup path.
The device of a kind of quick switchback business that the embodiment of the present invention provides, and be applied in IP/MPLS and SDH mixed networking.According to the WTR state of the edge router in local terminal IP/MPLS region, generate a WTR status indicator, and send the first notice message to the edge router in IP/MPLS region, opposite end, receive the second notice message of the edge router transmission in IP/MPLS region, opposite end, when the WTR status indicator in the first notice message and the two WTR status indicator of the second notice in message are WTR and finish to identify, business datum is transmitted from local terminal backup path switchback to local terminal main path.The prior art that temporary interruption occurs from the transfer of data that starts the different CES of causing of time point of switchback because of CES is compared, this programme is by waiting for to after finishing the PE of WTR after end regions and finishing the PE of this end regions FEFO WTR, carry out again the method for CES switchback, make two CES in region can realize quick switchback, and, the time that makes this end regions and end regions is started to be separated by between the time point of switchback is less than the stipulated time of switchback, solved the problem of the temporary interruption of the transfer of data generation long period of CES in prior art, thereby reliability and the self-healing ability of network have been improved.By increasing WTR status indicator, learn local terminal the one WTR status indicator and opposite end the 2nd WTR status indicator, when local terminal the one WTR status indicator and opposite end the 2nd WTR status indicator are not WTR and finish to identify, the transmission of business enters transition condition, thereby keep business datum to transmit at local terminal backup path, and then make business datum can continue transmission, and the phenomenon of having avoided business data transmission to interrupt.
Further, as shown in Figure 7, the message sending module 202 in device 200 comprises:
Packet sending unit 2021, for by described local terminal main path, described main SDH link and described opposite end main path, notifies message to the edge router transmission first in IP/MPLS region, described opposite end.
Wherein, main SDH link comprises isl frame expense, isl frame expense comprise WTR do not finish sign or WTR finish sign.
The device of a kind of quick switchback business that the embodiment of the present invention provides, and be applied in IP/MPLS and SDH mixed networking.According to the WTR state of the edge router in local terminal IP/MPLS region, generate a WTR status indicator, and send the first notice message to the edge router in IP/MPLS region, opposite end, receive the second notice message of the edge router transmission in IP/MPLS region, opposite end, when the WTR status indicator in the first notice message and the two WTR status indicator of the second notice in message are WTR and finish to identify, business datum is transmitted from local terminal backup path switchback to local terminal main path.The prior art that temporary interruption occurs from the transfer of data that starts the different CES of causing of time point of switchback because of CES is compared, this programme is by waiting for to after finishing the PE of WTR after end regions and finishing the PE of this end regions FEFO WTR, carry out again the method for CES switchback, make two CES in region can realize quick switchback, and, the time that makes this end regions and end regions is started to be separated by between the time point of switchback is less than the stipulated time of switchback, solved the problem of the temporary interruption of the transfer of data generation long period of CES in prior art, thereby reliability and the self-healing ability of network have been improved.This programme utilizes main path to be communicated with the function of recovering to transmit message, by local terminal, receives the second notice message that carries the 2nd WTR status indicator that send opposite end, realizes the detection to opposite end WTR ending message.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, between each embodiment identical similar part mutually referring to, each embodiment stresses is the difference with other embodiment.Especially, for apparatus embodiments, because it is substantially similar in appearance to embodiment of the method, so describe fairly simplely, relevant part is referring to the part explanation of embodiment of the method.
One of ordinary skill in the art will appreciate that all or part of flow process realizing in above-described embodiment method, to come the hardware that instruction is relevant to complete by computer program, described program can be stored in a computer read/write memory medium, this program, when carrying out, can comprise as the flow process of the embodiment of above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or random store-memory body (Random Access Memory, RAM) etc.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (8)
1. the method for a quick switchback business, it is characterized in that, for procotol/multiprotocol label switching IP/MPLS and SDH (Synchronous Digital Hierarchy) SDH mixed networking, described IP/MPLS and SDH mixed networking comprise local terminal IP/MPLS region and IP/MPLS region, opposite end, described local terminal IP/MPLS region comprises local terminal main path and local terminal backup path, IP/MPLS region, described opposite end comprises opposite end main path and opposite end backup path, and described local terminal IP/MPLS region and IP/MPLS region, described opposite end are by main SDH link or standby SDH link connection; When the path of described local terminal main path, described main SDH link composition occurs to interrupt, service data interaction is carried out by described local terminal backup path and described opposite end backup path in described local terminal IP/MPLS region and IP/MPLS region, described opposite end; Described method comprises:
When the edge router in described local terminal IP/MPLS region determines that the path recovery of described local terminal main path, described main SDH link composition is communicated with, start and recover to wait for WTR timing;
Obtain the WTR state of the edge router in described local terminal IP/MPLS region, according to the WTR state of the edge router in described local terminal IP/MPLS region, generate a WTR status indicator, and send the first notice message to the edge router in IP/MPLS region, described opposite end, described the first notice message comprises a WTR status indicator, a described WTR status indicator is corresponding with the edge router in described local terminal IP/MPLS region, and a described WTR status indicator comprises that WTR does not finish sign or WTR finishes sign;
Receive the second notice message of the edge router transmission in IP/MPLS region, opposite end, described the second notice message comprises the 2nd WTR status indicator, described the 2nd WTR status indicator is corresponding with the edge router in IP/MPLS region, described opposite end, and described the 2nd WTR status indicator comprises that WTR does not finish sign or WTR finishes sign;
Detect a described WTR status indicator and described the 2nd WTR status indicator whether be described WTR finish sign;
If a described WTR status indicator and described the 2nd WTR status indicator are described WTR, finish sign, described business datum is transmitted from described local terminal backup path switchback to described local terminal main path.
2. method according to claim 1, is characterized in that, also comprises:
When a described WTR status indicator and described the 2nd WTR status indicator are not described WTR and finish to identify, keep business datum to transmit at described local terminal backup path.
3. method according to claim 1, is characterized in that, described local terminal IP/MPLS region and IP/MPLS region, described opposite end are by main SDH link or standby SDH link connection; The described edge router to IP/MPLS region, described opposite end sends the first notice message, comprising:
By described local terminal main path, described main SDH link and described opposite end main path, to the edge router transmission first notice message in IP/MPLS region, described opposite end.
4. method according to claim 3, is characterized in that, described main SDH link comprises isl frame expense, described isl frame expense comprise described WTR do not finish sign or described WTR finish sign.
5. the device of a quick switchback business, it is characterized in that, for procotol/multiprotocol label switching IP/MPLS and SDH (Synchronous Digital Hierarchy) SDH mixed networking, described IP/MPLS and SDH mixed networking comprise local terminal IP/MPLS region and IP/MPLS region, opposite end, described local terminal IP/MPLS region comprises local terminal main path and local terminal backup path, IP/MPLS region, described opposite end comprises opposite end main path and opposite end backup path, and described local terminal IP/MPLS region and IP/MPLS region, described opposite end are by main SDH link or standby SDH link connection; When the path of described local terminal main path, described main SDH link composition occurs to interrupt, service data interaction is carried out by described local terminal backup path and described opposite end backup path in described local terminal IP/MPLS region and IP/MPLS region, described opposite end; Described device comprises:
Timing module, for when determining the path recovery connection that described local terminal main path, described main SDH link form, starts and recovers to wait for WTR timing;
Message sending module, for obtaining the WTR state of the edge router in described local terminal IP/MPLS region, according to the WTR state of the edge router in described local terminal IP/MPLS region, generate a WTR status indicator, and send the first notice message to the edge router in IP/MPLS region, described opposite end, described the first notice message comprises a WTR status indicator, a described WTR status indicator is corresponding with the edge router in described local terminal IP/MPLS region, and a described WTR status indicator comprises that WTR does not finish sign or WTR finishes sign;
Message receiver module, the the second notice message sending for receiving the edge router in IP/MPLS region, opposite end, described the second notice message comprises the 2nd WTR status indicator, described the 2nd WTR status indicator is corresponding with the edge router in IP/MPLS region, described opposite end, and described the 2nd WTR status indicator comprises that WTR does not finish sign or WTR finishes sign;
Whether label detection module, be described WTR for detection of a described WTR status indicator and described the 2nd WTR status indicator and finish sign;
Switchback determination module, while finishing to identify for being described WTR when a described WTR status indicator and described the 2nd WTR status indicator, transmits described business datum from described local terminal backup path switchback to described local terminal main path.
6. device according to claim 5, is characterized in that, also comprises:
Business keeps module, and while finishing to identify for not being described WTR when a described WTR status indicator and described the 2nd WTR status indicator, maintenance business datum is transmitted at described local terminal backup path.
7. device according to claim 5, is characterized in that, described local terminal IP/MPLS region and IP/MPLS region, described opposite end are by main SDH link or standby SDH link connection; Described message sending module, comprising:
Packet sending unit, for by described local terminal main path, described main SDH link and described opposite end main path, notifies message to the edge router transmission first in IP/MPLS region, described opposite end.
8. device according to claim 7, is characterized in that, described main SDH link comprises isl frame expense, described isl frame expense comprise described WTR do not finish sign or described WTR finish sign.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410418381.5A CN104202184A (en) | 2014-08-22 | 2014-08-22 | Quick service switchover method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410418381.5A CN104202184A (en) | 2014-08-22 | 2014-08-22 | Quick service switchover method and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104202184A true CN104202184A (en) | 2014-12-10 |
Family
ID=52087414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410418381.5A Pending CN104202184A (en) | 2014-08-22 | 2014-08-22 | Quick service switchover method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104202184A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104410570A (en) * | 2014-12-16 | 2015-03-11 | 北京东土科技股份有限公司 | VRRP (virtual router redundancy protocol) based data transmission method and device |
| CN106533811A (en) * | 2016-12-30 | 2017-03-22 | 中国电子科技集团公司第三十四研究所 | SDH (Synchronous Digital Hierarchy) based redundant communication system and redundancy protection method thereof |
| CN107508738A (en) * | 2017-07-31 | 2017-12-22 | 江西山水光电科技股份有限公司 | A kind of implementation method and equipment of the BFD based on CES business |
| WO2019056239A1 (en) * | 2017-09-21 | 2019-03-28 | 华为技术有限公司 | Packet synchronization method and device |
| CN109981452A (en) * | 2019-02-28 | 2019-07-05 | 新华三技术有限公司 | A kind of switchback method and device of PW link |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101944951A (en) * | 2010-08-30 | 2011-01-12 | 中兴通讯股份有限公司 | Method and device for switching back links between networks |
| CN102006188A (en) * | 2010-11-19 | 2011-04-06 | 中兴通讯股份有限公司 | Path back switching method and device in transport network |
| CN102355363A (en) * | 2011-08-12 | 2012-02-15 | 中兴通讯股份有限公司 | Method and apparatus for automatic protection switching |
| US20120195186A1 (en) * | 2011-01-31 | 2012-08-02 | Fujitsu Network Communications, Inc. | Method and system for preventing traffic loss caused by wait-to-restore mechanisms in service protection networks |
| WO2012162982A1 (en) * | 2011-09-20 | 2012-12-06 | 华为技术有限公司 | Aps service channel switching method and system, and aps device |
-
2014
- 2014-08-22 CN CN201410418381.5A patent/CN104202184A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101944951A (en) * | 2010-08-30 | 2011-01-12 | 中兴通讯股份有限公司 | Method and device for switching back links between networks |
| CN102006188A (en) * | 2010-11-19 | 2011-04-06 | 中兴通讯股份有限公司 | Path back switching method and device in transport network |
| US20120195186A1 (en) * | 2011-01-31 | 2012-08-02 | Fujitsu Network Communications, Inc. | Method and system for preventing traffic loss caused by wait-to-restore mechanisms in service protection networks |
| CN102355363A (en) * | 2011-08-12 | 2012-02-15 | 中兴通讯股份有限公司 | Method and apparatus for automatic protection switching |
| WO2012162982A1 (en) * | 2011-09-20 | 2012-12-06 | 华为技术有限公司 | Aps service channel switching method and system, and aps device |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104410570A (en) * | 2014-12-16 | 2015-03-11 | 北京东土科技股份有限公司 | VRRP (virtual router redundancy protocol) based data transmission method and device |
| CN104410570B (en) * | 2014-12-16 | 2017-09-08 | 北京东土科技股份有限公司 | A kind of data transmission method and device based on VRRP |
| CN106533811A (en) * | 2016-12-30 | 2017-03-22 | 中国电子科技集团公司第三十四研究所 | SDH (Synchronous Digital Hierarchy) based redundant communication system and redundancy protection method thereof |
| CN106533811B (en) * | 2016-12-30 | 2023-05-12 | 中国电子科技集团公司第三十四研究所 | SDH-based redundant communication system and redundancy protection method thereof |
| CN107508738A (en) * | 2017-07-31 | 2017-12-22 | 江西山水光电科技股份有限公司 | A kind of implementation method and equipment of the BFD based on CES business |
| WO2019056239A1 (en) * | 2017-09-21 | 2019-03-28 | 华为技术有限公司 | Packet synchronization method and device |
| CN109981452A (en) * | 2019-02-28 | 2019-07-05 | 新华三技术有限公司 | A kind of switchback method and device of PW link |
| CN109981452B (en) * | 2019-02-28 | 2021-03-23 | 新华三技术有限公司 | Method and device for switching back PW link |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101094175B (en) | Method, device, and system for protecting flux of multicast | |
| CN101999224B (en) | Redundant Ethernet automatic protection switching access to virtual private lan services | |
| JP4526423B2 (en) | Ring connection method and apparatus | |
| CN102025646B (en) | Link switching method and device thereof | |
| CN104202184A (en) | Quick service switchover method and device | |
| EP3217608B1 (en) | Switchback delay methods and devices | |
| CN103026663B (en) | Distributed connectivity verification protocol redundancy | |
| CN101170459A (en) | Failure detection and link recovery method based on bidirectional forward link | |
| CN101808022A (en) | Method and device for realizing bidirectional forwarding detection | |
| CN102638389A (en) | Redundancy backup method and system of TRILL (Transparent Interconnection over Lots of Links) network | |
| WO2012159489A1 (en) | Switching method, system and dual homing provider device for pseudowire dual homing network | |
| CN103023665B (en) | A kind of method of multi-cast service protection, the network equipment and system | |
| CN101944951A (en) | Method and device for switching back links between networks | |
| CN102142948A (en) | Data forwarding method, device and system | |
| WO2014090083A1 (en) | Service bearing method and apparatus during distributed resilient network interconnect | |
| WO2011157130A2 (en) | Path establishment method and apparatus | |
| CN101989930B (en) | Method and switching equipment for realizing Ethernet double loop | |
| WO2014206207A1 (en) | Route withdrawal method and network device | |
| WO2012106976A1 (en) | Fault protection method and device | |
| CN104639434A (en) | Open shortest path first protocol smooth restart method and device | |
| CN101826954A (en) | Method and system for realizing hot backup in centralized network nodes | |
| CN101621443B (en) | Failure recovery method of Ethernet ring protection system | |
| EP3139527B1 (en) | Protection switching method, node and control device | |
| CN101662329B (en) | Switching method, network nodes and network system | |
| CN101820376A (en) | Method and system for realizing rapid convergence in ring network |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20141210 |
|
| RJ01 | Rejection of invention patent application after publication |