CN101778312B - Detection method of residual connection of ASON/GMPLS (automatic switch optical network/generalized multiprotocol label switching) - Google Patents
Detection method of residual connection of ASON/GMPLS (automatic switch optical network/generalized multiprotocol label switching) Download PDFInfo
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Abstract
The invention discloses a detection method of residual connection of ASON/GMPLS (automatic switch optical network/generalized multiprotocol label switching). For the method, in the process of establishing connection through a signaling protocol for the first time, each ASON/GMPLS node records corresponding position information of a home endpoint resource on a link during distributing label resources, wherein a corresponding position refers to the position of a home endpoint on the uplink or the downlink of the link; the nodes send the resource active condition information of the home link endpoint to nodes located on the other end of the link, wherein a resource active condition comprises an idle state and an occupied state; and the nodes compare the resource active condition information of a home link endpoint with the received resource active condition on the other end of the link, and if the resource active condition of an uplink endpoint on the link is found to be idle and the resource active condition of a downlink endpoint of the line is found to be occupied, then the residual connection is judged to exist on the downlink endpoint of the link and the deletion of the residual connection is initiated.
Description
Technical field
The present invention relates to ASON (Automatic Switch Optical Network; ASON)/GMPLS (Generalized Multi-protocol Label Switching; The exchange of general multiple protocols label) technical field, the detection method that the remnants that are specifically related to exist in a kind of ASON/GMPLS network connect.
Background technology
ASON/GMPLS adopts independently, and control plane carries out establishment of connection, deletion, recovers automatically.Because control does not influence the business that is transmitting on the plane that transmits with the fault of the characteristic requirements control plane of data separating; The connection signaling status controll block that is connected control plane that the needs deletion under some abnormal conditions, possibly occur is deleted, but transmits the still occupied situation that does not have release of the corresponding resource in plane.These resources that do not discharge can not be used afterwards; And possibly cause in follow-up connection and set up in the process; If used the link that does not discharge resource; Though also have other idling-resource on it,, and cause label allocation failure and then cause connecting the foundation failure because the resource user mode of the upstream and downstream node of link is inconsistent.
As shown in Figure 1; Through RSVP (Resource Reservation Protocol is called for short RSVP), between client C1, C2, set up a LSP (Label Switch Path through A, B, three nodes of C; Label switched path) after; The control plane of Node B lost efficacy for a certain reason, and initiate the deletion of LSP from node A this moment, and the resource user mode is eliminated on connection signaling status controll block on the control plane of node A and the transmission plane.Because the control plane of Node B lost efficacy; So the transmission plane resource user mode on the Node B is not eliminated; After the control plane of Node B recovers; Be eliminated because the control plane on the node A connects signaling status controll block,, also can not recover the connection signaling status controll block of local LSP so the control plane of Node B neither can be received the signaling that shows deletion LSP.Just there is the resource that discharge and not discharge in the transmission plane of Node B, and cause the resource user mode on the link between node A, the B inconsistent like this.As if a newly-built LSP between client C1, C3, need to use the link between node A, the B, because the resource user mode on the node A is idle, and the resource user mode of correspondence then will cause label allocation failure for taking on the Node B, LSP sets up failure.
When the remnants connection that occurs was detected, general method was between the adjacent node of link, to confirm through protocol interaction whether the resource user mode of both link ends is consistent.But in the foundation and delete procedure of LSP, for an initial on all four link of two ends resource user mode, because employing is the distributed signaling technology, the resource user mode of both link ends is inconsistent situation to occur at short notice.As shown in fig. 1, when node A has sent RSVP Path message, though and Node B is not also received this message or receive when message is also handled, will occur inconsistent for the resource user mode at two ends this moment of the link between node A, the B.Though it is shorter the inconsistent time to occur, if just in the consistency detection of carrying out both link ends resource user mode, then can cause erroneous judgement this moment.Therefore, in order to reduce erroneous judgement, generally will introduce repeatedly verification, but this can cause the complicacy of testing mechanism, increase the load of data communication network, and can not avoid the generation of judging by accident in theory.
In addition; For PC (Permanent Connection; The permanent connection) move the remaining joint detection that occurs in (transferring control plane control to) process with SPC (Soft PermanentConnection, soft permanent connection) and also have the problems referred to above by management plane control.
Summary of the invention
The technical problem that the present invention will solve provides the remaining joint detection method of a kind of ASON/GMPLS; Solve signaling connect in foundations/delete procedure for the first time and PC and SPC transition process in the both link ends resource user mode that occurred temporary transient inconsistent and remnants that cause are connected erroneous judgement, locate the remnants connection rapidly and accurately.
In order to address the above problem, the invention provides the remaining joint detection method of a kind of ASON/GMPLS, comprising:
In the process that connects for the first time through signaling protocol; Each ASON/GMPLS node divides the relative position information of timing minute book endpoint resources on link carrying out label resources, and said relative position is meant that this end points is positioned at the upper reaches or the downstream position of said link;
Said node sends to the node that the link other end belongs to the resource user mode information of this end points of link, and wherein said resource user mode comprises " free time " or " taking ";
Said node compares the resource user mode information of this end points of the link resource user mode information with the link other end that receives; If it is idle finding the resource user mode of link upper reaches end points; The resource user mode of link downstream end points is for taking; Then judge to have remaining the connection on the end points of link downstream, and initiate the remaining deletion that connects.
Further, said relative position is that to set up the signaling direction with connection be reference direction.
Further, the said signaling protocol that connects for the first time comprises the RSVP RSVP.
Further, said node sends to the resource user mode information of this end points of link through the LMP resource management protocols node at link other end place.
Further; When said node sends to the node at link other end place in the resource user mode information with this end points of link; If the resource user mode of this end points is " taking ", then said resource user mode information also comprises the relative position information of this resource on link.
Further, in will forever connect the process of PC migration for soft permanent connection SPC through signaling protocol, said method also comprises:
Said node divides the relative position information of timing minute book endpoint resources on link carrying out label resources;
Said node sends to the node that the link other end belongs to the resource management rights state information of this end points of link, and wherein said resource management rights state comprises " management plane control " or " control plane control ";
Said node compares the resource management rights state information of this end points of the link resource management rights state information with the link other end that receives; If finding the resource management rights state of link upper reaches end points is management plane control; The resource management rights state of link downstream end points is control plane control; Then judge to have remaining the connection on the end points of link downstream, and initiate the remaining deletion that connects.
Further, said relative position is that to set up the signaling direction with connection be reference direction.
Further, said PC migration is comprised RSVP for the signaling protocol of SPC.
Further, said node sends to the resource management rights state information of this end points of link through the LMP agreement node at link other end place.
Further; When said node sends to the node at link other end place in the resource management rights state information with this end points of link; If the resource management rights state of this end points is " control plane control ", then said resource management rights state information also comprises the relative position information of this resource on link.
Description of drawings
Fig. 1 shows the remaining network structure that produces that connects;
Fig. 2 shows the network structure of specific embodiments of the present invention.
Embodiment
The remaining joint detection method of ASON/GMPLS provided by the invention is following:
The first step: in the process that connects for the first time through signaling protocol; The ASON/GMPLS node divides timing to write down following information carrying out label resources: setting up the signaling direction with connection is reference direction, the relative position (upstream/downstream) of this end points resource on link;
Second step: the node of link one end sends to the resource user mode information of this end points of link the node at link other end place through agreement; Wherein resource user mode information is except " idle/as to take "; For the resource user mode is what take, the relative position in the time of also need comprising this resource and be assigned with on link;
The 3rd step: the node of link one end compares the resource user mode information of the resource user mode information of this end points of link with the link other end that receives;
The 4th step: set up signaling direction direction as a reference with connection, the resource user mode of link upper reaches end points is idle, and then there be remaining the connection in the resource user mode of link downstream end points for taking on the end points of link downstream;
The 5th step: detect the node that has remaining connection and initiate the remaining deletion that connects.
Wherein, the described signaling protocol of the above-mentioned steps first step includes but not limited to RSVP;
Second step of above-mentioned steps, described agreement included but not limited to LMP (Link ManagerProtocol, LMP Link Manager Protocol) agreement.
Similarly, the remaining joint detection method under PC and SPC migration situation provided by the invention is following:
(a): through signaling protocol with PC migration in the process of SPC, the ASON/GMPLS node divides timing to write down following information carrying out label resources: setting up the signaling direction with connection is reference direction, the relative position (upstream/downstream) of this end points resource on link;
(b): the node of link one end sends to the resource management rights state information of this end points of link the node at link other end place through agreement; Wherein resource management rights state information is except " control of management plane control/control plane "; For the resource management rights state is control plane control, the relative position in the time of also need comprising this resource and be assigned with on link;
(c): the node of link one end compares the resource management rights state information of the resource management rights state information of this end points of link with the link other end that receives;
(d): set up signaling direction direction as a reference with connection, the resource management rights state of link upper reaches end points is management plane control, and the resource management rights state of link downstream end points is control plane control, then has remaining the connection on the end points of link downstream;
(e): detect the deletion that exists the remaining node initiation remnants that connect to connect.
Wherein, the signaling protocol described in the above-mentioned steps (a) includes but not limited to RSVP;
Agreement described in the above-mentioned steps (b) includes but not limited to the LMP agreement.
Below in conjunction with accompanying drawing the enforcement of technical scheme of the present invention is done further to describe in detail:
As shown in Figure 2, the ASON network is made up of A, B, three nodes of C, and internodal Linktype is STM-16.Through RSVP, between client C1, C2, set up VC4 (Virtual Container, a virtual container) LSP through A, B, three nodes of C, wherein the employed resource of the link between node A, B (the 1# port of A ← → the 2# port of B) is 1#VC4.
The first step according to the present invention in the technical scheme; The user mode of 1#VC4 in the 1# port of node A record is for taking; And set up the signaling direction with respect to the connection of A → B, the position of this resource on A, the internodal link of B (the 1# port of A ← → the 2# port of B) is the upper reaches; The user mode of 1#VC4 in the 2# port of Node B record is for taking, and sets up the signaling direction with respect to the connection of A → B, and the position of this resource on A, the internodal link of B (the 1# port of A ← → the 2# port of B) is downstream.
Afterwards, if the control plane of Node B lost efficacy for a certain reason, initiate the deletion of LSP from node A this moment, and the user mode of the 1#VC4 of the 1# port of node A becomes the free time.After a period of time, the control plane of Node B recovers, and the user mode of the 1#VC4 in the 2# port of Node B is still for taking.
According to the present invention in the technical scheme second step, node A, B are through the resource user mode information at protocol interaction link (the 1# port of A ← → the 2# port of B) two ends.
According to the present invention in the technical scheme the 3rd step, node A, B be the resource user mode information at link (the 1# port of A ← → the 2# port of B) two ends relatively separately.
According to the present invention in the technical scheme the 4th step; Node B is checked through the 1#VC4 of 2# port of B at the downstream position of link (the 1# port of A ← → the 2# port of B); And the downstream sources user mode is for taking; And the user mode of the 1#VC4 of the 1# port of its corresponding A is idle, and then Node B is judged pairing being connected to remaining connection of 1#VC4 of the 2# port of B.
In according to the present invention in the technical scheme the 5th step, Node B is initiated the deletion to the remnants connection of the 1#VC4 of the 2# port of B.
Correspondingly, the implementation step and the above-mentioned steps of the remaining joint detection method under PC and the SPC migration situation are similar, repeat no more at this.
Adopt the method for the invention; Solved owing to connect in the foundation/delete procedure and PC and SPC transition process in the temporary transient inconsistent remnants that cause of the both link ends resource user mode that occurred be connected erroneous judgement; Eliminated the window problem that exists on the traditional detection method, the location is remaining rapidly and accurately connects.
Claims (10)
1. ASON/remaining joint detection method of general multiple protocols label exchange ASON/GMPLS is characterized in that, comprising:
In the process that connects for the first time through signaling protocol; Each ASON/GMPLS node divides the relative position information of timing minute book endpoint resources on link carrying out label resources, and said relative position is meant that this end points is positioned at the upper reaches or the downstream position of said link;
Said node sends to the node that the link other end belongs to the resource user mode information of this end points of link, and wherein said resource user mode comprises " free time " or " taking ";
Said node compares the resource user mode information of this end points of the link resource user mode information with the link other end that receives; If it is idle finding the resource user mode of link upper reaches end points; The resource user mode of link downstream end points is for taking; Then judge to have remaining the connection on the end points of link downstream, and initiate the remaining deletion that connects.
2. the method for claim 1 is characterized in that, said relative position is that to set up the signaling direction with connection be reference direction.
3. according to claim 1 or claim 2 method is characterized in that the said signaling protocol that connects for the first time comprises the RSVP RSVP.
4. according to claim 1 or claim 2 method is characterized in that, said node sends to the resource user mode information of this end points of link through the LMP resource management protocols node at link other end place.
5. according to claim 1 or claim 2 method; It is characterized in that; When said node sends to the node at link other end place in the resource user mode information with this end points of link; If the resource user mode of this end points is " taking ", then said resource user mode information also comprises the relative position information of this resource on link.
6. the method for claim 1 is characterized in that, in will forever connect the process of PC migration for soft permanent connection SPC through signaling protocol, said method also comprises:
Said node divides the relative position information of timing minute book endpoint resources on link carrying out label resources;
Said node sends to the node that the link other end belongs to the resource management rights state information of this end points of link, and wherein said resource management rights state comprises " management plane control " or " control plane control ";
Said node compares the resource management rights state information of this end points of the link resource management rights state information with the link other end that receives; If finding the resource management rights state of link upper reaches end points is management plane control; The resource management rights state of link downstream end points is control plane control; Then judge to have remaining the connection on the end points of link downstream, and initiate the remaining deletion that connects.
7. method as claimed in claim 6 is characterized in that, said relative position is that to set up the signaling direction with connection be reference direction.
8. like claim 6 or 7 described methods, it is characterized in that, said PC migration is comprised RSVP for the signaling protocol of SPC.
9. like claim 6 or 7 described methods, it is characterized in that said node sends to the resource management rights state information of this end points of link through the LMP agreement node at link other end place.
10. like claim 6 or 7 described methods; It is characterized in that; When said node sends to the node at link other end place in the resource management rights state information with this end points of link; If the resource management rights state of this end points is " control plane control ", then said resource management rights state information also comprises the relative position information of this resource on link.
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| CN1477885A (en) * | 2002-08-21 | 2004-02-25 | 深圳市中兴通讯股份有限公司 | Method for implementing high-grade link control procedure prame treatment |
| CN101141321A (en) * | 2007-08-09 | 2008-03-12 | 中兴通讯股份有限公司 | Method for real-time detecting residual time slot in automatic exchange optical network system |
| EP1938519A1 (en) * | 2005-09-16 | 2008-07-02 | IPWireless, Inc. | Scheduling data across a shared communication link in a cellular communication system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1477885A (en) * | 2002-08-21 | 2004-02-25 | 深圳市中兴通讯股份有限公司 | Method for implementing high-grade link control procedure prame treatment |
| EP1938519A1 (en) * | 2005-09-16 | 2008-07-02 | IPWireless, Inc. | Scheduling data across a shared communication link in a cellular communication system |
| CN101141321A (en) * | 2007-08-09 | 2008-03-12 | 中兴通讯股份有限公司 | Method for real-time detecting residual time slot in automatic exchange optical network system |
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