CN1187993C - Signaling cascading method of exchange connection in automatic exchange optic/transport network - Google Patents
Signaling cascading method of exchange connection in automatic exchange optic/transport network Download PDFInfo
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- CN1187993C CN1187993C CNB031149316A CN03114931A CN1187993C CN 1187993 C CN1187993 C CN 1187993C CN B031149316 A CNB031149316 A CN B031149316A CN 03114931 A CN03114931 A CN 03114931A CN 1187993 C CN1187993 C CN 1187993C
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Abstract
The utility model relates to an exchange connection signaling cascade connection method in an automatic exchange light/transmission network. Network edge node maintenance inlet and outlet are provided with two connecting mapping tables, and after user network interface message transmitted by client equipment is received, the relation between the corresponding network internal connection and user network interface local connection is created, deleted or looked up in the connecting mapping tables. The user network interface message is changed into a 'private' object and is sent out with network internal signaling. A far end edge node receives the signaling message with a user network interface object, the corresponding user network interface local connection is created, deleted or looked up, and the signaling message is sent to the client equipment. In the present invention, switching connection and soft permanent connection commonly use a main software module, and routing and signaling in the network are not changed. The realization and the deployment of an automatic switching optical network controlling plane are simplified, and the standard of the interconnection and the forum of the message sent to a user by the network and light is completely uniform to ensure the interoperability of the good network.
Description
Technical field:
The present invention relates to the signaling cascade method that exchange connects in a kind of ASON or the automatic switched transport network, belong to optical communication and networking technology area.
Technical background:
Traditional communication network constitutes by transmitting plane and management plane, is a kind of typical central control system.ASON or automatic switched transport network are introduced distributed control plane between two planes, realize automatic topological discover, and linkage function is end to end calculated and set up dynamically, remove and safeguard to route.
At present, mainly contain 3 and be organized in the standardization effort that carries out ASON: International Telecommunications Union's standard definition the demand and the frame structure of ASON; Internet engineering duty group has proposed a lot of drafts, is commonly referred to as general multiple labeling exchange agreement, can be used for the control plane of ASON inside; Optical interconnection forum has made specified in more detail to the signaling procedure of User Network Interface.But the exchange connection for International Telecommunications Union's regulation is the end-to-end connection procedure of Client-initiated, and optical interconnection forum and Internet engineering duty group are not all described.There is not bridge between the general multiple labeling exchange agreement of the User Network Interface of optical interconnection forum and Internet engineering duty group, exchange connects 3 sections isolated passages of network internal label switched path that the User Network Interface by the sourcesink two ends connects in the middle of adding and constitutes, and can't realize that subscriber signaling connects end to end.If the method for the network equipment direct communication of employing source and place User Network Interface perhaps by the method for management plane announcement, can be introduced new signaling protocol, increase the complexity that ASON is realized and disposed.
Summary of the invention:
The objective of the invention is at the deficiencies in the prior art, a kind of signaling cascade method that is used to exchange connection is proposed, can transmit any type message between the customer equipment, realize that complete subscriber signaling end to end connects, do not change the route and the signaling protocol of ASON inside, and can share internal network route and signaling software module with the another kind of soft switch connected mode of ASON, realize interconnecting of User Network Interface and GMPLS.
For realizing such purpose, the present invention is connected mapping table at two of the ASON edge nodes maintain entrance and exits that each and customer equipment link.After receiving the User Network Interface message that customer equipment sends,, connect and the locally-attached relation of User Network Interface in the corresponding network internal of creating, deleting or search correspondence that connects in the mapping table according to type of message.If User Network Interface message need be passed through ASON, User Network Interface message is become " privately owned " object, send with the network internal signaling.The network intermediate node is not done any processing to this " privately owned " object, directly transmits.The remote edge node is received the signaling message that has the User Network Interface object, creates, deletes or search the local connection of corresponding User Network Interface, sends to corresponding customer equipment.
" privately owned " type object is a kind of Signalling method of being convenient to expand that defines in the GMPLS, and equipment vendor and operator can define its content voluntarily, and it sends with signaling.If with the direct forwarding that is set to of " privately owned " object, the network intermediate node does not need to do any change, directly " privately owned " object is continued to transmit with signaling.
This locality that inlet connects mapping table recording user network interface source customer equipment connects the relation that connects with corresponding network internal, and content comprises:
The source customer equipment; Local connection identifier; The network internal connection identifier.
Outlet connection mapping table record network internal connects the locally-attached relation with the corresponding User Network Interface place network equipment, and content comprises:
The network internal connection identifier; Local connection identifier.
The source network device of User Network Interface is received the signaling message that the source customer equipment sends, if connection request message, Ingress node is set up a network internal passage, and creates respective entries in inlet connection mapping table; If other kind of message connects the inside connection identifier that checks in correspondence in the mapping table at inlet.
The place network equipment of User Network Interface is received the signaling message that the place customer equipment sends, if refuse or the dismounting acknowledge message, Egress node is removed corresponding network internal passage, and deletes corresponding clauses and subclauses in outlet connection mapping table; If other kind of message connects the inside connection identifier that checks in correspondence in the mapping table in outlet.
Pass the User Network Interface message that network internal arrives remote customer devices for needs, User Network Interface message is become " privately owned " object, send with the network internal signaling message, the network intermediate node is not done any processing to this " privately owned " object, directly transmits.In ASON inside, it is shared with route and the signaling software module of soft permanent connection the (management plane triggering) to realize that exchange connects (customer equipment triggering).The Web portal node can be judged the type that this is connected by having or not " privately owned " User Network Interface object in the network internal signaling message with Egress node, if not then be soft permanent connection; Otherwise be that exchange connects.
Connect for exchange, at the Web portal node, if refusal or remove acknowledge message, be transmitted to corresponding source customer equipment after, and connect these clauses and subclauses of deletion in the mapping table at inlet; Other kind of message is searched inlet and is connected mapping table, obtains the local connection of source customer equipment.
In network exit node, if connection request message, the place network equipment of User Network Interface produces new this locality and connects, and is transmitted to the place customer equipment, and connects mapping table establishment respective entries in outlet; Other kind of message is searched outlet and is connected mapping table, and this locality that obtains corresponding place customer equipment connects.
The present invention goes for User Network Interface and returns more and link to each other and the special circumstances of source, the unification of the place network equipment.
The invention solves the end-to-end user signaling that exchange connects in the ASON connects, do not change the route and the signaling of network internal, two kinds of connected mode exchange connections and the soft permanent shared main software module that is connected in the ASON be can make, the realization and the deployment of ASON control plane simplified.It is in full accord that network sends to user's message and optical interconnection forum specification, and do not require that the subscriber signaling agreement is consistent with network internal signaling protocol type, serves as signaling gateway function, guaranteed the good network interoperability.
Description of drawings:
Fig. 1 is the signaling cascade schematic diagram that exchange connects in the ASON (ASON).
As shown in Figure 1, customer equipment (1,2,3,4) (C adopts between D) and returns (Multi-homing) continuous more for A, B with the network equipment, promptly a customer equipment links to each other with a plurality of network equipments, and perhaps a network equipment links to each other with a plurality of customer equipments, returns the reliability that can guarantee network more.ASON among the figure (ASON) internal network node does not draw, and LC represents that this locality between the User Network Interface connects, and LSP represents the label switched path of network internal.
The network equipment of Fig. 2 User Network Interface (UNI) is received the operational flowchart of customer equipment signaling message.
Fig. 3 ASON (ASON) fringe node is received the operational flowchart of internal network signaling message.
Embodiment:
The invention will be further described below in conjunction with drawings and Examples.
One embodiment of the present of invention are the connection of returning shown in the accompanying drawing 1 more.
Among Fig. 1, have 4 exchanges and connect:
1. to customer equipment 3 (LC1), A sets up LSP1 between the C to customer equipment 1 through network equipment A (LC1), network equipment C.
2. to customer equipment 3 (LC1), A sets up LSP2 between the D to customer equipment 1 through network equipment A (LC2), network equipment D.
3. to customer equipment 2 (LC1), C sets up LSP3 between the A to customer equipment 4 through network equipment C (LC1), network equipment A.
4. to customer equipment 1 (LC1), B sets up LSP4 between the B to customer equipment 2 through network equipment B (LC1), network equipment B.
Above several points to note are: 1) inlet of the network equipment of source user network interface and ASON is same node generally speaking, network equipment A as above-mentioned article one exchange connection, the network equipment and the outlet edge node of same place User Network Interface also are same node generally speaking, as the network equipment C that above-mentioned article one exchange connects, not that the situation of same node can realize that exchange connects with the proxy signaling mode; 2) fringe node both may be the source, also may be the place, so each node in fact all had two mapping tables; 3) this locality of source user network interface connects by the customer equipment generation, and this locality connection of place User Network Interface is produced by the network equipment.For the corresponding relation of the local connection of unique expression with network internal, inlet connects needs to add source customer equipment sign in the mapping table, outlet connects in the mapping table then unnecessary, on network equipment A, the inlet that connects corresponding to article one exchange connects mapping 1:LC1-LSP1, the outlet that connects corresponding to the 3rd exchange connects mapping LSP3-LC1, though these two local connections all are LC1, is produced by customer equipment 1 and network equipment A respectively; 4) the 4th exchange connection is a kind of special circumstances, and promptly the source and the place network equipment are same node, and it is zero the jumping that corresponding network internal connects LSP4, only at local node interconnection is arranged.
The signaling procedure that connects (by the connection LC1 of customer equipment 1 to network equipment A, network equipment A forms to customer equipment 3 to connection LSP1 and the network equipment C of network equipment C) with article one exchange among Fig. 1 is an example:
1, after source network device A receives the message of source customer equipment 1, judges whether it is to connect the request of foundation.If after address resolution and route computational process, obtain a demonstration route to place network equipment C.Ingress node begins hop-by-hop and sets up LSP1.A connects mapping table at inlet and creates new clauses and subclauses 1:LC1-LSP1, and User Network Interface (UNI) message is become " privately owned " object puts into the demand signalling of setting up of LSP1 and send together.If the message of other type, then directly connect in the mapping table and find out corresponding inner connection identifier LSP1, and User Network Interface (UNI) message is become " privately owned " object put into the signaling of LSP1 and send together at inlet.Intermediate node is set up LSP1 according to the demonstration route, but this " privately owned " object is not done any processing, directly sends to next-hop node.The aforesaid operations flow process is shown in Fig. 2 (a).
2, after network equipment C in place receives ASON (ASON) inside story, judge whether to have " privately owned " User Network Interface (UNI) object, if have and be connection request message, send the User Network Interface connection to place customer equipment 3 and set up message, and in the outlet mapping table, create new clauses and subclauses LSP1-LC1.If C receives other kind of message that has " privately owned " User Network Interface (UNI) object, in outlet connection mapping table, find out corresponding local connection identifier LC1, send User Network Interface message to the place customer equipment.The message of if C receives not to be had " privately owned " User Network Interface (UNI) object, explanation is soft permanent connection, does not need to send User Network Interface message to customer equipment.The aforesaid operations flow process is shown in Fig. 3 (b).
3, after network equipment C in place receives User Network Interface (UNI) message of place customer equipment 3 transmissions, judge whether it is that refusal or dismounting are confirmed, if not, in the outlet mapping table, check in corresponding LSP1, the User Network Interface connection response message is become " privately owned " object, be placed in the connection response message of LSP1 and return transmission to source network device A hop-by-hop; If, the corresponding clauses and subclauses of deletion in the outlet mapping table.The aforesaid operations flow process is shown in Fig. 2 (b).
4, after source network device A receives ASON (ASON) inside story, judge whether to have " privately owned " User Network Interface (UNI) object and be not refusal or remove confirm, connect the 1:LC1 that checks in correspondence in the mapping table at inlet, send the connection response message of User Network Interface to source customer equipment 1, if refusal or tear down message, the corresponding clauses and subclauses of deletion in the inlet mapping table.The message of if A receives not to be had " privately owned " User Network Interface (UNI) object, explanation is soft permanent connection, does not need to send User Network Interface (UNI) message to customer equipment.The aforesaid operations flow process is shown in Fig. 3 (a).
For the situation of sourcesink network equipment unification, as the connection of customer equipment 2 to 1 through network equipment B, except that not needing the participation of ASON interior signaling process, other step is similar.
Claims (1)
1, the signaling cascade method that exchange connects in a kind of automatic exchange light/transmission network is characterized in that comprising:
1) two mapping tables of ASON edge nodes maintain of linking of each and customer equipment at first, this locality that inlet connects mapping table recording user network interface source customer equipment connects the relation that connects with corresponding network internal, content comprises source customer equipment, local connection identifier and network internal connection identifier, outlet connection mapping table record network internal connects the locally-attached relation with the corresponding User Network Interface place network equipment, and content comprises network internal connection identifier and local connection identifier;
2) receive the signaling message that the source customer equipment sends when the source network device of User Network Interface, if connection request message, Ingress node is set up a network internal passage, and in inlet connection mapping table, create respective entries, if other kind of message connects the inside connection identifier that checks in correspondence in the mapping table at inlet;
3) according to inner connection identifier, the network internal signaling is sent to network exit node along this passage hop-by-hop by the Web portal node, pass the User Network Interface message that network internal arrives remote customer devices for needs, User Network Interface message is become " privately owned " object, send with the network internal signaling message, the network intermediate node is not done any processing to this " privately owned " object, directly transmit, in ASON inside, it is shared with soft permanent route that is connected and signaling software module to realize that exchange connects;
4) network exit node is judged the type of this connection by having or not " privately owned " User Network Interface object in the network internal signaling message, if not then be soft permanent connection, otherwise is that exchange connects; Connect for exchange, in network exit node, if connection request message, the place network equipment of User Network Interface produces new this locality and connects, and is transmitted to the place customer equipment, and connects mapping table establishment respective entries in outlet, other kind of message, search outlet and connect mapping table, this locality that obtains corresponding place customer equipment connects, and sends to the place customer equipment;
5) receive the signaling message that the place customer equipment sends when the place of the User Network Interface network equipment, if refusal or dismounting acknowledge message, Egress node is removed corresponding network internal passage, and connect the corresponding clauses and subclauses of deletion in the mapping table in outlet, if other kind of message connects the inside connection identifier that checks in correspondence in the mapping table in outlet;
6) according to inner connection identifier, the network internal signaling turns back to the Web portal node along this passage hop-by-hop by network exit node, pass the User Network Interface message that network internal arrives remote customer devices for needs, User Network Interface message is become " privately owned " object, send with the network internal signaling message;
7) at the Web portal node, if refusal or dismounting acknowledge message, be transmitted to corresponding source customer equipment, and in inlet connection mapping table, delete these clauses and subclauses, other kind of message, search inlet and connect mapping table, obtain the local connection of source customer equipment, in network exit node, if connection request message, the place network equipment of User Network Interface produces new this locality and connects, be transmitted to the place customer equipment, and connect mapping table establishment respective entries, other kind of message in outlet, search outlet and connect mapping table, this locality that obtains corresponding place customer equipment connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031149316A CN1187993C (en) | 2003-01-16 | 2003-01-16 | Signaling cascading method of exchange connection in automatic exchange optic/transport network |
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| CNB031149316A CN1187993C (en) | 2003-01-16 | 2003-01-16 | Signaling cascading method of exchange connection in automatic exchange optic/transport network |
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| CN1187993C true CN1187993C (en) | 2005-02-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101499851B (en) * | 2008-01-30 | 2011-12-07 | 中兴通讯股份有限公司 | Method for interconnecting automatic switch optical network with traditional optical network |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100387032C (en) * | 2004-04-21 | 2008-05-07 | 华为技术有限公司 | Method for implementing multiple interactions with external data system in one intelligent call |
| CN100417097C (en) * | 2006-09-14 | 2008-09-03 | 中兴通讯股份有限公司 | A method to establish soft permanent connection in intelligent optical network |
| CN101437321B (en) * | 2007-11-15 | 2010-12-08 | 中兴通讯股份有限公司 | Method for signaling cascade for radio frequency zooming unit |
| CN101170514B (en) * | 2007-12-04 | 2010-06-02 | 华为技术有限公司 | Method and device for access control between access circuit interfaces |
| CN101299893B (en) * | 2008-06-03 | 2011-05-11 | 中兴通讯股份有限公司 | Method for migration based on status transition in automatically exchanging optical network |
| CN101854257B (en) * | 2010-05-25 | 2014-02-19 | 中兴通讯股份有限公司南京分公司 | Method and system for migrating connection management in automatic switch optical network (ASON) |
| CN103107896A (en) * | 2011-11-09 | 2013-05-15 | 李秉钧 | Transmission resource scheduling system covering whole transport network |
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2003
- 2003-01-16 CN CNB031149316A patent/CN1187993C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101499851B (en) * | 2008-01-30 | 2011-12-07 | 中兴通讯股份有限公司 | Method for interconnecting automatic switch optical network with traditional optical network |
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