CN100505589C - Method for building up optical channel in intelligent optical network - Google Patents
Method for building up optical channel in intelligent optical network Download PDFInfo
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- CN100505589C CN100505589C CNB2004100706548A CN200410070654A CN100505589C CN 100505589 C CN100505589 C CN 100505589C CN B2004100706548 A CNB2004100706548 A CN B2004100706548A CN 200410070654 A CN200410070654 A CN 200410070654A CN 100505589 C CN100505589 C CN 100505589C
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Abstract
The method includes steps: (1) beginning from the source node, after receiving request for building optical channel, network node calculates and distributes local resources, and sends message of the request to next node of network device; then, starting from destination node, according to direction opposite to direction of request for building optical channel, returning reply message of connection establishment; finally, starting from source node, sending validation message to all nodes passed by service channel; (2) if there is service on up route direction in locality of network node, then starting up service channel testing on local up route direction; (3) if there is service on down route direction in locality of network node, then obtaining result of testing service channel on down route direction; after channels of all nodes, which possess service on down route, is successful tested, establishment of optical channel is completed.
Description
Technical field
The present invention relates to reliably set up in the ASON method of optical channel, belong to the optical communication technique field.
Background technology
Because control plane in the ASON and transmission planar separation.So the optical channel that can not guarantee to transmit plane reality after control plane completes successfully and connect to set up fully is unobstructed.That is optical channel is not verified that the service signal that just begins to transmit the client immediately may cause losing of business datum after, the control plane signaling is finished and connect to be set up.
Do not mention setting up of optical channel in the existing disclosed documents and materials and will verify whether correctly carrying client business of optical channel in the process.In order to verify whether optical channel can normally transmit client signal, traditional way is whether after the control plane connection is set up successfully, it is successful to test the optical channel of being set up on the transmission plane by instrument.This verification method is very dumb, and more consuming time.When network breaks down, need recover a large amount of fault business, this method of having built test more obviously can not be used for verifying fast the reliability of the optical channel of building in ASON, can not satisfy the requirement of professional fast quick-recovery under the ASON failure condition.So the optical channel of conventional method is set up and can only be guaranteed successfully to set up at control plane at present, can not guarantee to transmit the plane and can correctly transmit client's service signal.
Summary of the invention
The technical problem that the present invention solves has provided optical passage establishing method in a kind of ASON, and the optical channel that assurance is set up is the carrying client service signal reliably.
The method that the present invention proposes may further comprise the steps:
The first step: from source node, after network node is received the optical channel request of setting up, calculate and also distribute local resource, and optical channel is set up request message send to the next-hop network device node.Then, from destination node, set up opposite direction by the optical channel request and return the response message that connects foundation.At last, begin to send acknowledgement message from source node to all nodes of service channel process.
Second step: the direction business if set out on a journey in network node this locality then starts set out on a journey direction service channel test of this locality.
The 3rd step:, then obtain this underground road direction service channel test result if there is the business of following road direction network node this locality.When having the lane testing success back optical channel foundation of the node of following road business, all finish.
Wherein first step node is in the process of Resources allocation, and the controlled entity of node can be undertaken by serial mode to the action that transmits the entity Resources allocation, also can be undertaken by parallel mode.Serial mode is meant that controlled entity waits for after transmitting the entity Resources allocation that the controlled entity that transmits entity successful respond posterior nodal point just will connect and set up request message and be transmitted to next-hop node.The controlled entity that parallel mode is meant node not wait acknowledge and directly will connect and set up request message and send to next-hop node after transmitting the entity Resources allocation by the node control entity.
Wherein second step started test action and can restart test after transmitting the entity Resources allocation and receiving the transmission entities respond at the node control entity, also can start test when transmitting the entity Resources allocation.
Wherein test can send test massage by the service channel of setting out on a journey to correspondence and simulate the transmission channel service in second step, and inserts specific tracking byte information and realize in the path overhead of tested service channel.
Wherein the detection of test result can be after the node that road business under the optical channel is arranged is received acknowledgement message in the 3rd step, and the controlled entity inquiry is local to transmit the entity test result, and sends this node test result's notice message to source node.The detection of test result also can be to have the transmission entity of road business under the optical channel in a single day to detect to test successfully, transmits entity and initiatively reports optical channel test successful information to controlled entity, and notify the message of this node lane testing success to source node.
Method of the present invention compared with prior art from the engineering point of view of application, can guarantee correctly transport service of the optical channel set up, has satisfied the requirement that the intelligent network fast and reliable is set up optical channel.Be a kind of technology that will existing transmit network of being very suitable for, adopt the existing investment of user that can adequately protect of this technology to the ASON smooth upgrade.
Description of drawings:
Fig. 1 is the ASON exemplary topology diagram;
Fig. 2 is that the embodiment flow chart is set up in two-way services connection of the present invention;
Fig. 3 is that the embodiment flow chart is set up in one way traffic connection of the present invention;
Fig. 4 is that the embodiment flow chart is set up in broadcasting service connection of the present invention.
Embodiment:
Embodiments of the invention are described below with reference to the accompanying drawings.
Fig. 1 is typical ASON topological diagram, and the control plane of ASON is made of NODE A, NODE B, NODE C, NODE D, five controlled entities of NODE E among the figure.The transmission plane of ASON is made up of XC A, XCB, XC C, XC D, five transmission entities by cross connect function of XC E.Wherein, XC both can represent the electric interconnection transmission equipment in the SDH/SONET network, also can represent the OXC optical cross-connection equipment in the wavelength division multiplexed network.An ASON node comprises a controlled entity and a transmission entity, constitutes intelligent node A as NODE A and XC A, and the NODE A control of control plane transmits the XC A on plane.Other nodes are controlled transmitting the plane entity by the control plane entity by man-to-man mode equally.Come mutual signaling information by the IP signaling net between each controlled entity in the control plane.Transmitting in the plane each transmits between entity to connect by optical fiber and transmits the optical channel business information.
The optical channel connection building process of two-way services is as shown in Figure 2:
At first, source customer equipment or webmaster send the link setup request to intelligent optical network equipment controlled entity NODE A, NODEA begins to start the link setup timer after receiving request, and begins to calculate explicit route, the calculating of entire path and distribute the time slot or the wavelength resource of local output.The resource of having distributed can not be given other connection again.NODE A transmits entity XC A according to distributed time slot/wavelength resource to this locality and issues interconnection order is set, and does not wait for that the interconnection that transmits entity XC A replys NODE A and just construct the concurrent link setup request message that is sent to downstream direction.
NODE B is according to explicit route in the link setup request message and link attribute calculation of parameter and distribute the time slot or the wavelength resource label of local output.Output time solt/wavelength resource that NODE B distributes according to output time solt/wavelength and this locality of upstream node distribution issues interconnection to this locality transmission entity OX B order is set, and does not wait for that the concurrent link setup request message that is sent to downstream direction of NODE B structure is replied in the interconnection of transmission entity XC B.And NODE B transmits the link setup request after will waiting for replying of XC B more to downstream node under the serial mode.
After purpose controlled entity NODE C receives the link setup request message in the network, calculate and distribute the time slot/wavelength resource label of local output.NODE C is provided with order according to the output label of upstream node distribution and the output time solt/wavelength resource label of local node distribution to local node XC C transmission interconnection.Simultaneously, NODE C sends request message to the purpose customer equipment.After the link setup of receiving the purpose customer equipment allowed, NODE C checked whether receive replying of the local interconnection setting that transmits network element XCC.Receive the interconnection acknowledgement command of XC C as NODE C after, transmitting entity XC C to purpose issues and starts this locality direction service channel test command of setting out on a journey, purpose transmits entity XC C and begins to send test massage the analogue transmission channel service to the set out on a journey passage of direction of correspondence, and inserts specific tracking byte information in the path overhead of tested service channel.NODE C constructs the concurrent link setup response message that is sent to NODE B then.Otherwise the asynchronous always grade of NODE C is by the time just construct the link setup response message of the concurrent NODE of being sent to B after receiving the acknowledgement command of XC C.
After NODE B receives the link setup response message of NODE C, check and whether receive replying of the local interconnection setting that transmits network element XC B, receive that replying back NODE B sends the link setup response message to NODE A.Otherwise the link setup response message of just constructing the concurrent NODE of being sent to A behind the XC B acknowledgement command is received in the asynchronous always wait of NODE B.
Source network device controlled entity NODE A receives that the local interconnection that is provided with that transmits entity XC A replys the back and transmit entity XC A to the source and issue and start this locality direction service channel test command of setting out on a journey, the source is transmitted entity XC A and is begun to send test massage the analogue transmission channel service to respective channel, and inserts specific tracking byte information in the path overhead of tested service channel.After receiving that interconnection from the link setup response message of NODE B and local XC A is provided with acknowledgement command, local whether entity XC A receives test signal and expection in the optical channel of road direction under correspondence the path overhead that transmits is checked in the order that source NODE A issues inquiry lane testing result.If corresponding transmission passage can be received the path overhead of test signal and expection, then the optical channel of the following road direction business of source transmission entity XC A is tested successfully.And report the local lane testing success message that transmits road direction business under the entity to NODE A.
Source node NODE A receive the interconnection from the link setup response message of NODE B and local XC A acknowledgement command is set after NODE A send acknowledgement message to downstream node.After destination node NODE C received acknowledgement message, destination node issued inquiry lane testing result's order and checks local whether entity XC C receives test signal and expection in the optical channel of the following road of correspondence traffic direction the path overhead that transmits.Can receive the path overhead of test signal and expection if corresponding following road direction transmits passage, then the optical channel of the following road direction business of purpose transmission entity XC C is tested successfully.If the lane testing success, then NODE C sends the notice message of road direction operational trials success under the destination node to source node NODE A.
Receive the lane testing success message of the lane testing success message of local node and destination node NODE C as source node NODE A after, source node NODE A reports passage to set up successful message.So far, transmitting network is to have set up a complete two-way services optical channel between the customer equipment.Can normally transmit bi-directional data between the customer equipment.
Above-mentioned two-way connection is set up the controlled entity of each node under the mode to parallel the carrying out of transmission entity Resources allocation.And controlled entity is just transmitted the link setup request after will waiting for replying of corresponding transmission entity XC A to downstream node under the serial mode.If intra-node controlled entity and transmit communication time between the entity and transmit whole time of entity handles order long with respect to the time of Signalling exchange between the controlled entity then can be finished the link setup process under the parallel mode quickly.
It is just to start the optical channel test after the interconnection of XC A or XC C is replied when NODE A or NODE C receive that above-mentioned two-way connection is set up under the mode.Can certainly be after XC A or XC C issue the interconnection order, to start the optical channel test simultaneously as NODE A or NODE C.
The detection that optical channel test result under the mode is set up in above-mentioned two-way connection is just to inquire about whether success of XC A or the test of XC C optical channel after NODE A or NODE C receive acknowledgement message.Can certainly be after XC A or XC C receive the expense of the test signal of expection and expection, initiatively to report NODE A or the successful message of NODE C test.
In the link setup process,, directly return the overtime failure of link setup if source node NODE A link setup time-out time arrives.
Among the figure, the sequencing of sequence number express time.As shown in Figure 2, NODE A calculate and Resources allocation after, transmit entity XC A to this locality and issue after interconnection is provided with order, do not wait for that interconnection is provided with replying of order and issues the link setup request message immediately to downstream node.The response message that the link setup response message and the transmission node of downstream node is provided with the interconnection order arrives the sequencing of local node and can not determine (use different sequence numbers as 16,4-1 represents) in advance.But must be upstream nodes to send the link setup response message after the both arrives.Issue the interconnection order, command response returns and issue the test starting order sequencing (representing sequencing as step 4,4-1,4-2 among the figure) is arranged.
The optical channel connection building process of one way traffic is as shown in Figure 3:
Set up with the two-way services optical channel and to compare, the optical channel of one way traffic is set up the test command that need not start the local direction service channel of not setting out on a journey in the flow process in destination node, also need whether not test success at the passage that source node detects this underground road direction business.Only need receive and issue the test command that starts the local direction service channel of setting out on a journey to XC A after interconnection is replied at source Control Node NODE A, the source is transmitted entity XC A and is begun to send test massage the analogue transmission channel service to the correspondence direction passage of setting out on a journey, and inserts specific tracking byte information in the path overhead of tested service channel.After destination node NODE C received acknowledgement message, local whether entity XC C receives test signal and expection in the direction optical channel of the following road of correspondence the path overhead that transmits was checked in the order that issues inquiry lane testing result.Can receive the path overhead of test signal and expection if corresponding following road direction transmits passage, then the optical channel of road direction business is tested successfully under the purpose transmission entity XC C.If the lane testing success, then NODE C is to the successful notice message of source node NODE A sendaisle test.After receiving the lane testing success message that NODE C sends, source node NODE A report optical channel to set up successful message.So far, set out on a journey from source node for one, the one way traffic optical channel successful connection on road is set up under the destination node.
The optical channel of broadcasting service connects the link setup flow process as shown in Figure 4:
Foundation is compared with the one way traffic optical channel, also only need receiving at source Control Node NODE A of broadcasting service issues the lane testing order that starts the local direction business of setting out on a journey to XC A after the interconnection of local transmission node XC A is replied, source transmission node XC A begins to send test massage the analogue transmission channel service to the correspondence direction passage of setting out on a journey, and inserts specific tracking byte information in the path overhead of tested service channel.After branch's Control Node on road under each optical channel business was received acknowledgement message, the order that issues inquiry lane testing result checked whether local transmission node receives the path overhead of test signal and expection in the optical channel of the following road of correspondence direction.If the transmission passage of corresponding following road direction can be received the path overhead of test signal and expection, then the optical channel of this following road branch is tested successfully.If success, this Control Node reports the successful message of the professional branched bottom test in corresponding following road to source node NODE A.After receiving the successful message of optical channel test that all following roads branch reports, source node NODE A just reports the successful message of connection foundation.
The treatment in accordance with the present invention way after control plane connects foundation, verifies by start the lane testing function on the transmission plane whether transmit passage successfully sets up.If transmit the channel authentication success, the optical channel of being set up just can begin to transmit reliably client's service signal.This can satisfy the requirement that ASON recovers professional fast and reliable fully.
Claims (7)
1. optical passage establishing method in the ASON is characterized in that, said method comprising the steps of:
The first step: from source node, after network node is received the optical channel request of setting up, calculate and also distribute local resource, and optical channel is set up request message send to the next-hop network device node; Then, from destination node, set up opposite direction by the optical channel request and return the response message that connects foundation, after each node receives that this locality of response message that the connection of downstream node is set up and each node is transmitted the entity sending node cross-coupled acknowledgement command is set, send to the upstream node of each node again and connect the response message of setting up; At last, source node begins to send acknowledgement messages to all nodes of service channel process from source node after receiving that the response message of setting up from the connection of destination node is provided with acknowledgement command with the local interconnection that transmits entity;
Second step: the direction business if set out on a journey in network node this locality then starts set out on a journey direction service channel test of this locality;
The 3rd step:, then obtain this underground road direction service channel test result if there is the business of following road direction network node this locality; When having the lane testing success back optical channel foundation of the node of following road business, all finish.
2. the method for claim 1, it is characterized in that, wherein first step node is in the process of Resources allocation, the controlled entity of node is undertaken by serial mode to the action that transmits the entity Resources allocation, and promptly the controlled entity of node is waited for after transmitting the entity Resources allocation that the controlled entity that transmits entity successful respond posterior nodal point just will connect and set up request message and be transmitted to next-hop node.
3. the method for claim 1, it is characterized in that, wherein first step node is in the process of Resources allocation, the controlled entity of node is undertaken by parallel mode to the action that transmits the entity Resources allocation, i.e. the controlled entity of node not wait acknowledge and directly will be connected by the node control entity and set up request message and send to next-hop node after transmitting the entity Resources allocation.
4. as claim 1 or 2 or 3 described methods, it is characterized in that, wherein second step started test action and restarts test at the node control entity after transmitting the entity Resources allocation and receiving the transmission entities respond, was perhaps starting test when transmitting the entity Resources allocation.
5. as claim 1 or 2 or 3 described methods, it is characterized in that, wherein test sends test massage by the service channel of setting out on a journey to correspondence and simulates the transmission channel service in second step, and inserts specific tracking byte information and realize in the path overhead of tested service channel.
6. as claim 1 or 2 or 3 described methods, it is characterized in that, wherein the detection of test result is after the node that road business under the optical channel is arranged is received acknowledgement message in the 3rd step, the controlled entity inquiry is local to transmit the entity test result, and sends this node test result's notice message to source node.
7. as claim 1 or 2 or 3 described methods, it is characterized in that, wherein the detection of test result is to have the transmission entity of road business under the optical channel in a single day to detect to test successfully in the 3rd step, transmit entity and initiatively report optical channel test successful information, and notify the message of this node lane testing success to source node to controlled entity.
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| CNB2004100706548A CN100505589C (en) | 2004-07-28 | 2004-07-28 | Method for building up optical channel in intelligent optical network |
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| EP3057269B1 (en) * | 2013-10-31 | 2018-01-17 | Huawei Technologies Co., Ltd. | Control channel establishment method, apparatus and system |
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