CN100531117C - Information transmission method of optical network of automatic exchange - Google Patents
Information transmission method of optical network of automatic exchange Download PDFInfo
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- CN100531117C CN100531117C CNB2005100351634A CN200510035163A CN100531117C CN 100531117 C CN100531117 C CN 100531117C CN B2005100351634 A CNB2005100351634 A CN B2005100351634A CN 200510035163 A CN200510035163 A CN 200510035163A CN 100531117 C CN100531117 C CN 100531117C
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- time slot
- group number
- multicast group
- label switched
- multicast
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/20—Support for services
- H04L49/201—Multicast operation; Broadcast operation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/16—Arrangements for providing special services to substations
- H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
- H04L12/1863—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast comprising mechanisms for improved reliability, e.g. status reports
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/35—Switches specially adapted for specific applications
- H04L49/356—Switches specially adapted for specific applications for storage area networks
- H04L49/357—Fibre channel switches
Abstract
The method comprises: in automatically switching optical network, a protocol data packet is used to establish a label switch path in a control plane in order to complete data transmission; adding a group number of multicast into said label switch path ID; said group number of multicast is used to define a time slot sharing of multicast service; for a same multicast group number of same head node, the input port of service head node in its corresponding label switch path has an identical time slot; when the group number of multicast is 0, it represents its corresponding label switch path is not in a multicast; when the group number of multicast is not 0, it represents its corresponding label switch path is in a multicast; at each node on service link corresponding to the label switch path, estimating the time slot sharing of multicast; time slot is shared by those multicast services having identical group number, identical head node input port time slot, and identical access link and outlet link.
Description
Technical field
The present invention relates to digital information transmission, relate in particular to a kind of information transmission method of optical network of automatic exchange.
Background technology
In ASON (ASON:Automatically Switched OpticalNetwork), for general multiple protocols label conversion (MPLS:Multi-Protocol LabelSwitching), can adopt Label Distribution Protocol (the CR-LDP:Constraint-based Routed Label Distribution Protocol) expansion of traffic engineering expansion (RSVP-TE:RSVP-TrafficEngineering) agreement or limited route, for example, RSVP (RSVP:Resource Reservat ion Protocol) runs in the control plane of ASON ASON, be used for setting up professional signaling protocol at ASON ASON, use the certain protocol packet, as RSVP traffic engineering Extended Protocol, passage (as the overhead byte of SDH network) by control plane is delivered to each node, each node carries out professional foundation according to packet content, thereby finishes the set up process of whole piece business from the source node to the destination node.Existing resource reservation protocol RSVP technology is finished transfer of data by setting up label switching path LSP when setting up business, as shown in Figure 1, the label switched path of the service link correspondence of three business is as follows:
LSP1：A-＞B-＞F；
LSP2：A-＞B-＞C-＞D；
LSP3：A-＞B-＞C-＞G。
Can support the method for light multicast service to set up the not one way traffic that distributes separately of chummage, time slot of one group of homology by the RSVP traffic engineering among RSVP RSVP expansion RSVP-TE signaling, wherein each business is independent separately, time slot distributes separately, in same path, can't share time slot, cause the waste of time interval resource.
Summary of the invention
The object of the present invention is to provide a kind of information transmission method of optical network of automatic exchange, realize that the time slot of light multicast service is shared, effectively utilize time interval resource, to overcome the defective that causes the time interval resource waste of the prior art.
Information transmission method of optical network of automatic exchange of the present invention is:
In ASON, wrap in by protocol data and to set up label switched path in the control plane, finish transfer of data, in described label switched path sign, increase the multicast group number, described multicast group number is used for determining that the time slot of multicast service is shared, the time slot of judging multicast service in each node of label switched path corresponding service link is shared, and for the same multicast group number with first node, professional first node inbound port time slot is identical in the corresponding label switching path;
Described multicast group number is 0 o'clock, and the corresponding label switched path of expression does not belong to multicast; Described multicast group number is non-0 o'clock, and then the corresponding label switched path of expression belongs to multicast;
Share time slot for the multicast service that multicast group number, first node inbound port time slot, inbound link are all identical with outbound.
When newly-built multicast service, node is signed the multicast group number of switching path for day-mark yet to be built, compares with the multicast group number of existing label switched path with first node, does following processing:
For the label switched path that does not have the same multicast group number, distribute time slot by normal condition, set up professional;
For the label switched path that the same multicast group number is arranged, inbound link and inlet time slot are identical, and outbound is identical, and the time slot that direct employing has been used is shared the sourcesink time slot;
For the label switched path that the same multicast group number is arranged, inbound link and inlet time slot are identical, and outbound is inequality, then distributes the place time slot, set up to intersect, and share the source time slot this moment;
For the label switched path that the same multicast group number is arranged, inbound link and inlet time slot difference, processing reports an error.
In deletion during multicast service, node is for the multicast group number of waiting to delete label switched path, compares with the multicast group number of existing label switched path with first node, specifically handles as follows:
If there is not the label switched path of same multicast group number, then, discharge time slot by the normal condition deletion;
If the label switched path of same multicast group number is arranged, inbound link and inlet time slot are the same, and the outbound difference discharges the place time slot, and deletion is corresponding to intersect, and deletes this label switched path to be deleted;
If the label switched path of same multicast group number is arranged, gateway link and inlet time slot are the same, delete this label switched path to be deleted.
Beneficial effect of the present invention is: in the present invention, increase the multicast group number in the label switched path sign, processing based on existing label switched path, the time slot of determining multicast service by the multicast group number is shared, according to multicast group number, inbound link and the outbound etc. of multicast service, in the node of service link, judge, handle, realize that the time slot of multicast service is shared, effectively utilize time interval resource, improved the resource utilization and the operational efficiency of network.
Description of drawings
Fig. 1 uses schematic diagram for prior art;
Fig. 2 uses schematic diagram for the present invention;
Fig. 3 is processing controls schematic flow sheet in the node among the present invention;
Fig. 4 is deletion multicast service control flow schematic diagram among the present invention.
Embodiment
With example the present invention is described in further detail with reference to the accompanying drawings below:
Among the ASON ASON as shown in Figure 2, in control plane, set up label switching path LSP by RSVP RSVP packet, aspect signaling process, during newly-built multicast service, except that the input parameter of common label switching path LSP, needing increases the multicast group number GroupID that specifies this label switching path LSP affiliated, and for the same multicast group number GroupID with first node, professional first node inbound port time slot is identical among the corresponding label switching path LSP; Route provides professional routing iinformation, signaling is sent out message according to routing iinformation by normal flow, set up each node interconnection, in four business shown in Figure 2, professional first node inbound port time slot is identical with the multicast group number GroupID that is increased in each label switching path LSP, and the label switched path of the service link correspondence of four business is as follows:
LSP1：A-＞B-＞F
LSP2：A-＞B-＞C-＞G
LSP3：A-＞B-＞C-＞D-＞H
LSP4：A-＞B-＞C-＞D-＞E
Therefore, in the present invention, can abide by RSVP traffic engineering expansion RSVP-TE agreement, the label switching path LSP sign then comprises as the lower part:
End-node address, (1.IPv4 or IPv6) tunnel;
2. tunnel ID;
3. expand tunnel ID;
Sender address, (4.IPv4 or IPv6) tunnel;
5.LSP?ID；
6. multicast group number GroupID;
Multicast group number GroupID sign can adopt 32 shapings, is increased to Path as an object, Resv, and PassErr, in the ResvErr message data structure, thereby realization is to the support of multicast.Multicast group number GroupID is 0 o'clock, and the corresponding label switching path LSP of expression does not belong to multicast; Described multicast group number GroupID is non-0 o'clock, and then the corresponding label switching path LSP of expression belongs to multicast.
Identical, the first node inbound port of multicast group number GroupID time slot is identical, inbound link and outbound homogeneous phase simultaneously, multicast service is shared time slot, hence one can see that, as shown in Figure 2, in four business:
In Fig. 2,1. locate i.e. A-＞B link, LSP1, LSP2, the shared time slot of LSP3, LSP4;
In Fig. 2,2. locate i.e. B-＞C link, LSP2, LSP3, the shared time slot of LSP4;
In Fig. 2,3. locate i.e. C-＞D link, the shared time slot of LSP3, LSP4.
In the present invention, judge that according to label switched path the time slot of multicast service is shared in each node of service link, when newly-built multicast service, the node of service link initiates to set up process according to RSVP RSVP, cross-connect module in the node is for the multicast group number GroupID of upright label switching path LSP yet to be built, compare with the multicast group number GroupID of existing label switching path LSP with first node, its concrete processing procedure is as follows:
1, as shown in Figures 2 and 3,, distribute time slot, set up professional by normal condition for the label switching path LSP that does not have same multicast group number GroupID.
2, as shown in Figures 2 and 3, for the label switching path LSP that same multicast group number GroupID is arranged, inbound link and inlet time slot (being the source time slot) are identical, outbound is identical, inlet time slot that direct employing has been used and outlet time slot (being the place time slot), share the sourcesink time slot, return success to signaling.
3, as shown in Figures 2 and 3, for the label switching path LSP that same multicast group number GroupID is arranged, inbound link and inlet time slot are identical, and outbound is inequality, then distributes the place time slot, sets up to intersect, and shares the source time slot this moment.
4, as shown in Figures 2 and 3, for the label switching path LSP that same multicast group number GroupID is arranged, inbound link and inlet time slot difference, outbound is identical, and this situation should not exist under the assurance of routing multicast algorithm, and processing reports an error.
5, as shown in Figures 2 and 3, for the label switching path LSP that same multicast group number GroupID is arranged, inbound link and inlet time slot difference, the outbound difference, this situation should not exist under the assurance of routing multicast algorithm, and processing reports an error.
After the processing by above-mentioned shared time slot, finish transfer of data.
In the present invention, during the deletion multicast service, the node of service link is initiated deletion according to RSVP RSVP, cross-connect module in the node is for the multicast group number GroupID that waits to delete label switching path LSP, compare with the multicast group number GroupID of existing label switching path LSP with first node, specifically handle as follows:
I, as shown in Figure 4 if there is not the label switching path LSP of same multicast group number GroupID, then by the normal condition deletion, discharges time slot, and deletion intersects, and deletes this label switching path LSP to be deleted.
II, as shown in Figure 4, if the label switching path LSP of same multicast group number GroupID is arranged, inbound link and inlet time slot are the same, and the outbound difference discharges the place time slot, and deletion is corresponding to intersect, and deletes this label switching path LSP to be deleted.
III, as shown in Figure 4, if the label switching path LSP of same multicast group number GroupID is arranged, gateway link and inlet time slot are the same, delete this label switching path LSP to be deleted, and need not delete intersection.
IV, as shown in Figure 4, if the label switching path LSP of same multicast group number GroupID is arranged, inbound link and inlet time slot difference, this situation should not exist, and processing reports an error.
For the ASON that adopts traffic engineering expansion RSVP-TE agreement,, realized that the time slot of multicast service is shared by the control and the processing of the foregoing description; Equally,, can realize that the time slot of multicast service is shared, need not give unnecessary details herein by same or analogous control and processing for the ASON of the Label Distribution Protocol CR-LDP that adopts limited route.
Claims (5)
1. information transmission method of optical network of automatic exchange, it is characterized in that: it adopts following method: in ASON, wrap in by protocol data and to set up label switched path in the control plane, finish transfer of data, in described label switched path sign, increase the multicast group number, described multicast group number is used for determining that the time slot of multicast service is shared, the time slot of judging multicast service in each node of label switched path corresponding service link is shared, for the same multicast group number with first node, professional first node inbound port time slot is identical in the corresponding label switching path.
2. information transmission method of optical network of automatic exchange according to claim 1 is characterized in that: described multicast group number is 0 o'clock, and the corresponding label switched path of expression does not belong to multicast; Described multicast group number is non-0 o'clock, and then the corresponding label switched path of expression belongs to multicast.
3. information transmission method of optical network of automatic exchange according to claim 1 is characterized in that: share time slot for the multicast service that multicast group number, first node inbound port time slot, inbound link are all identical with outbound.
4. information transmission method of optical network of automatic exchange according to claim 1, it is characterized in that: when newly-built multicast service, node is signed the multicast group number of switching path for day-mark yet to be built, compares with the multicast group number of existing label switched path with first node, does following processing:
For the label switched path that does not have the same multicast group number, distribute time slot by normal condition, set up professional;
For the label switched path that the same multicast group number is arranged, inbound link and inlet time slot are identical, and outbound is identical, and the time slot that direct employing has been used is shared the sourcesink time slot;
For the label switched path that the same multicast group number is arranged, inbound link and inlet time slot are identical, and outbound is inequality, then distributes the place time slot, set up to intersect, and share the source time slot this moment;
For the label switched path that the same multicast group number is arranged, inbound link and inlet time slot difference, processing reports an error.
5. information transmission method of optical network of automatic exchange according to claim 4, it is characterized in that: when the deletion multicast service, node is for the multicast group number of waiting to delete label switched path, compares with the multicast group number of existing label switched path with first node, specifically handles as follows:
If there is not the label switched path of same multicast group number, then, discharge time slot by the normal condition deletion;
If the label switched path of same multicast group number is arranged, inbound link and inlet time slot are the same, and the outbound difference discharges the place time slot, and deletion is corresponding to intersect, and deletes this label switched path to be deleted;
If the label switched path of same multicast group number is arranged, gateway link and inlet time slot are the same, delete this label switched path to be deleted.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100351634A CN100531117C (en) | 2005-06-04 | 2005-06-04 | Information transmission method of optical network of automatic exchange |
| PCT/CN2006/001212 WO2007009335A1 (en) | 2005-06-04 | 2006-06-05 | A method for realizing the multicast service in an automatic switch optical network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100351634A CN100531117C (en) | 2005-06-04 | 2005-06-04 | Information transmission method of optical network of automatic exchange |
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| CN1874293A CN1874293A (en) | 2006-12-06 |
| CN100531117C true CN100531117C (en) | 2009-08-19 |
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| WO (1) | WO2007009335A1 (en) |
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| CN101394677B (en) * | 2007-09-19 | 2012-10-03 | 烽火通信科技股份有限公司 | Method and device for verifying link attribute in node of ASON |
| CN101415131B (en) * | 2008-11-28 | 2011-05-18 | 北京邮电大学 | Self-adapting transmission control method for optical network based on signaling |
| CN102098591B (en) * | 2009-12-11 | 2013-08-21 | 中兴通讯股份有限公司 | Method for sharing resources in automatic switched optical network (ASON) and service node |
| CN103491001B (en) * | 2012-06-11 | 2018-03-13 | 中兴通讯股份有限公司 | Layered LSP LSP processing methods, device and gateway node |
| CN105491558A (en) * | 2014-09-18 | 2016-04-13 | 北京信威通信技术股份有限公司 | Method for generating IPv6 multicast address of cluster group |
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| KR100315668B1 (en) * | 2000-03-10 | 2001-11-29 | 윤종용 | Method for setting lsp in mpls system |
| US20030137971A1 (en) * | 2002-01-22 | 2003-07-24 | Mark Gibson | Telecommunications system and method |
| WO2004071032A1 (en) * | 2003-02-07 | 2004-08-19 | Nippon Telegraph And Telephone Corporation | Multicast transfer route setting method, and multicast label switching method for implementing former method |
| CN1315294C (en) * | 2003-05-07 | 2007-05-09 | 华为技术有限公司 | Method for realizing universal multi-protocol mark exchange in network |
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| CN1874293A (en) | 2006-12-06 |
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