CN100452683C - Intelligent wavelength routing optical network node structure supporting link management protocol - Google Patents
Intelligent wavelength routing optical network node structure supporting link management protocol Download PDFInfo
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- CN100452683C CN100452683C CNB2003101090670A CN200310109067A CN100452683C CN 100452683 C CN100452683 C CN 100452683C CN B2003101090670 A CNB2003101090670 A CN B2003101090670A CN 200310109067 A CN200310109067 A CN 200310109067A CN 100452683 C CN100452683 C CN 100452683C
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Abstract
The present invention relates to an intelligent wavelength routing optical network node structure supporting a link management protocol. A transferring and coupling exchange structure is added on the existing single optical exchanger; an input part in the transferring and coupling exchange structure is composed of a plurality of 1*2 path splitters, optical door switches with the same quantity, a star coupler and a receiver; an output part is composed of a transmitter, a plurality of 1*2 optical switches, an optical door switch and a plurality of 2*1 couplers. A universal multi-mark exchange control plane software module controls and sends message formats according to data packet formats and processing mechanisms defined by the link management protocol LMP; the transferring and coupling exchange structure ensures that data emitted by the control plane software module can be transferred to other nodes by any output optical fiber on nodes. The present invention can support the automatic verification of adjacent nodes, detect the optical fiber connection relation of two adjacent nodes, and realize the automatic detection of the corresponding relation of all ports of the nodes by a channel associated signaling technology and the transferring coupling structure.
Description
Technical field
The present invention relates to a kind of intelligent wavelength route optical network node apparatus of supporting LMP Link Manager Protocol, be a kind of intelligent light net node apparatus of forming by optical transceiver, optical coupler, optical switch, optical switch module and node control software etc., belong to the photonic system field in the optical communication technique.
Background technology
Along with the development of society and the progress of science and technology, emerging broadband data service demands such as wideband video, multimedia service, bandwidth distribution according to need and the automatic supply of light path constantly increase.Adopt wavelength division multiplexing (WDM) technology on an optical fiber, to transmit the multipath high-speed signal simultaneously, improved the transmission capacity of optical fiber greatly.All-optical network scheme based on wavelength-division multiplex technique has the good transparency, wavelength routing characteristic, compatibility and extensibility, can become the first-selection of at a high speed of future generation even ultrahigh speed broadband network at the bandwidth demand of long time endoadaptation high speed broadband service.
International Telecommunications Union (ITU-T) and international project task groups (IETF) and its hetero-organization are devoted to formulate the automatic light path supply of WDM optical-fiber network and protection and recovery agreement fast.The GMPLS agreement (GMPLS) that present ITU-T has accepted the IETF proposition realizes agreement as ASON (ASON) control plane standard, realizes the issue of routing iinformation and provide light path automatic supply capacity in control plane.Realize that the automatic supply of light path can reduce the spending of operator aspect configuration, deployment, maintenance, training ASON, makes full use of the optical transport network resource of having laid.
After the ASON node device is installed, installation personnel must be according to the corresponding relation of the fiber port of the specified configuration adjacent node of LMP Link Manager Protocol (LMP) guaranteeing setting up correct connection relational table at local node, this can by manual or automatically configuration realize.Because all-optical network has the good transparency, pure Optical Switch Node can not change to the data-signal that transmits in the optical channel or check, makes and finds that automatically becoming of port corresponding relation is very difficult, can only be by Installation and Debugging personnel manual configuration.Because the erecting bed actual conditions is varied, human configuration has not only increased operator's equipment training, maintenance and operational overhead, and configuration error very easily appears, carry out wrong configuration when causing control plane to set up light path, therefore realize that the automatic configuration of adjacent node port corresponding relation has very real demand, and existing pure optical switching device can't support node between the automatic discovery feature of fiber port corresponding relation.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, a kind of intelligent wavelength route optical network node apparatus of supporting LMP Link Manager Protocol is proposed, support adjacent node to verify and detect two adjacent node optical fiber connection relations automatically, automatic detection by channel associated signalling technology and transmission and coupled structure realization node all of the port corresponding relation, it is with low cost to have realization, uses advantage easily.
For realizing such purpose, the intelligent wavelength route optical network node apparatus of the support LMP Link Manager Protocol that the present invention proposes is to have added to transmit coupling (Delivery-and-Coupling) switch on existing pure optical switching matrix (PXC), realizes that on full Optical Switch Node LMP Link Manager Protocol LMP verifies the function of the port corresponding relation between adjacent node automatically.
In technical scheme of the present invention, transmit coupling exchange and be divided into input and output two parts.Wherein the importation is made up of the optical gate switch of several 1 * 2 splitters, equivalent amount, star coupler and receiver; Output is made up of a 1510nm transmitter, several 1 * 2 optical switches, 1 optical gate switch and several 2 * 1 couplers.In the importation, every input optical fibre of node is divided into two-way through optical branching device earlier, and one the tunnel is connected with the input port of pure optical switching matrix, and an end of another Lu Yuyi optical gate switch connects by optical fiber.The other end of all optical gate switches all links to each other with the input port of same star coupler by optical fiber, and the output of star coupler is connected with general multiple labeling exchange control plane software module (abbreviating the control plane software module as) at last through the 1510nm receiver; The output of control plane software module connects transmission coupling exchange output, link to each other through the input port of transmitter with 1 * 2 optical switch group, an output port of each 1 * 2 optical switch in 1 * 2 optical switch group and the output port of pure optical switching matrix are connected by optical fiber with one 2 * 1 coupler, its another output port connects the input port of next 1 * 2 optical switch, and last 1 * 2 optical switch links to each other with a coupler through an optical gate switch.The output port of 2 * 1 different couplers all connects with different node output optical fibre.
Every the optical fiber that enters node is all told the light signal of 10% part by the optical branching device on the passage separately, enter a star coupler collect to go into from all light signal of optical fiber through the optical gate switch.The optical gate switch has a pair of input and output port, and whether the light signal that can control input optical gate switch can make the optical gate switch be in path or the two states that opens circuit from output port output.Under the normal operating conditions, these optical gate switches only guarantee that one of them is in channel status, other all be in off state, control plane software can be controlled and transmit the coupling exchange importation and gather only any one road signal.The receiver of the output port of star coupler and a 1510nm joins, and light signal is changed into the signal of telecommunication, and its entrained data enter the control plane software module and handle.This working mechanism has guaranteed to have and only have the data of one road input optical fibre to obtain handling.
The data that control plane software will send change into light signal through the 1510nm transmitter with the signal of telecommunication, enter the output that transmits coupling exchange.Transmit the coupling exchange output and be by some groups 1 * 2 optical switches and optical gate switch and constitute, wherein 1 * 2 optical switch has an input port and two output ports, can as required the light signal of input be switched to any one of two output ports.Transmit in the coupling exchange, 1 * 2 all optical switches interconnect, the input port and the 1510nm transmitter output port that are first 1 * 2 optical switch join, its output port links to each other with the input port of next 1 * 2 optical switch, and another output port links to each other by optical fiber with 2 * 1 couplers, and the like.Suppose that node has n bar output optical fibre,, all have one 1 * 2 optical switch to be attached thereto, and another port of n-1 optical switch links to each other with coupler by an optical gate switch corresponding to preceding n-1 bar optical fiber.Thereby output optical fibre n bar in this node apparatus, the number of 1 * 2 optical switch are n-1, and the optical gate switch has n+1, and what wherein link to each other with input optical fibre is n, is connected with output optical fibre and has only 1.1 * 2 optical switch has straight-through and intersects two kinds of operating states, if optical switch is in pass-through state, it just can be sent to input optical signal the input port of the next one 1 * 2 optical switch adjacent with it in the transmission coupling exchange; If crossing condition, the light signal of input will arrive the optical gate switch of optical switch correspondence therewith.The purpose that transmits the such design of coupling exchange is that the data that assurance control plane software module is sent can select any output optical fibre on the node to be sent to other node.
Defined data packet format of the LMP Link Manager Protocol that the message format of control plane software module and transmission is organized to set up according to IETF (LMP) and treatment mechanism.When need not to use the transmission coupling exchange, wherein all optical gate switches are set to off state, and all 1 * 2 optical switches are set to pass-through state.
The intelligent wavelength route optical network node apparatus of support LMP Link Manager Protocol of the present invention, can support adjacent node to verify and detect two adjacent node optical fiber connection relations automatically, by the automatic detection of channel associated signalling technology and transmission and coupled structure realization node all of the port corresponding relation.The present invention is simple in structure, and the function that relates to all can adopt cheap optical device to be realized, has effectively reduced the cost of realizing finding automatically port corresponding relation function, and job stability and reliability are very high.Only need to increase by 1 * 2 optical switch and the number of optical gate switch and the cascade number of star-type coupler and promptly can be applicable to more massive node, structural extended is good.
Description of drawings
Fig. 1 is the structural representation of the intelligent wavelength route optical network node apparatus of support LMP Link Manager Protocol of the present invention.
As shown in Figure 1, node apparatus of the present invention has increased the transmission coupling exchange on the basis of the pure optical switching matrix of PXC as the processing core, be used for the fiber port of selective reception or transmission, realizes test automatically and checking port corresponding relation.
Fig. 2 realizes that for the present invention two adjacent switching node A and B find automatically and the example of checking port corresponding relation.
As shown in Figure 2, the present invention is by the transmission coupling exchange of configuration recipient and transmit leg, coordinates A and B node and need to select the port that detects right, verifies automatically and tests.
Embodiment
Below in conjunction with drawings and Examples technical scheme of the present invention is further described.
The structure of the intelligent wavelength route optical network node apparatus of support LMP Link Manager Protocol of the present invention as shown in Figure 1.
Node apparatus shown in Fig. 1 is made up of pure optical switching matrix and transmission coupling exchange two parts.The fiber-optic signal that enters node will be divided into two-way, and one the tunnel enters pure optical switching matrix, and one the tunnel enters the transmission coupling exchange; The output signal process coupler of the light signal of transmission coupling exchange output and pure optical switching matrix enters the output optical fibre of node, as the output signal of node.Transmit coupling exchange and be divided into input and output two parts.Wherein the importation is made up of the optical gate switch of several 1 * 2 splitters, equivalent amount, star coupler and receiver; Output is made up of a 1510nm transmitter, several 1 * 2 optical switches, 1 optical gate switch and several 2 * 1 couplers.In the importation, every input optical fibre of node is divided into two-way through optical branching device earlier, and one the tunnel is connected with the input port of pure optical switch, and an end of another Lu Yuyi optical gate switch connects by optical fiber.The other end of all optical gate switches all links to each other with the input port of same star coupler by optical fiber, and the output of star coupler is connected with general multiple labeling exchange control plane software module (abbreviating the control plane software module as) at last through the 1510nm receiver; Another part is that transmitter links to each other with the input port of 1 * 2 optical switch group, an output port of each 1 * 2 optical switch in 1 * 2 optical switch group is connected by optical fiber with one 2 * 1 coupler with the output port of pure optical switching matrix, its another output port connects the input port of next 1 * 2 optical switch, and last 1 * 2 optical switch links to each other with a coupler through an optical gate switch.The output port of 2 * 1 different couplers all connects with different node output optical fibre.
Every of node input optical fibre is all told 10% light signal as the input signal that transmits coupling exchange through 10/90 splitter among Fig. 1, and they enter star coupler through separately optical gate switch respectively.When the optical gate on off state on the input optical fibre was channel status, the optical gate on off state on other optical fiber must be set to off state, and this has just guaranteed that a certain moment only has one road input optical fibre signal and enters star coupler.The control plane software module can be from from selecting arbitrarily one road signal the signal of all input optical fibres, convert the signal of telecommunication to through the 1510nm receiver after, the information that it is entrained is sent into the control plane software module and is handled.The message that the control plane software module is sent is sent into and is transmitted the coupling exchange output, be converted into the light signal of 1510nm through transmitter, 1 * 2 optical switch group and optical gate switch by the configuration cascade, enter output optical fibre through coupler again and transmit, the light signal of transmitter output can switch to any output optical fibre like this.Transmit the coupling exchange output and whether can operate as normal depend on working in coordination of 1 * 2 optical switch group, promptly transmitting to have an optical switch to be in crossing condition at the most in the optical switch group in the coupling exchange, the light signal of optical sender output could be switched to any output optical fibre of node.When all 1 * 2 optical switches all were in direct-passing mode, the optical gate switch that transmits the coupling exchange output must be set to channel status.When need not to use the transmission coupling exchange, wherein all optical gate switches are set to off state, and all 1 * 2 optical switches are set to pass-through state.
Fig. 2 is applied to an enforcement example of actual ASON for the present invention.
A and B two nodes are adjacent nodes among Fig. 2, and the output optical fibre of A node links to each other one by one with the input optical fibre of B node, can realize the automatic checking and the test of A and B node port corresponding relation by transmission coupling exchange shown in Figure 1.Before installing and disposing the GMPLS control plane, need the optical fiber connected mode between earlier definite A and B,＜port p, port q〉two tuples can describe the port annexation between A and B, and all port two tuples that connect A and B have been formed the port connection relational table on A and the B.Adopt the detailed course of work of A of the present invention and B node as shown in Figure 2.Among the figure across the curve representation of node A and B how be used in the LMP agreement validation chain path connectedness signaling message the route of process.Here the light signal on the link AB is to be sent to B by A, promptly detects and verify the corresponding relation of going into the optical fiber port on fiber port and the B of going out on the A node.The control plane software module of A node is configured to respectively intersect and channel status by one group of 1 * 2 optical switch and the optical gate switch that it is transmitted on coupling exchange, light signal arrives Node B through the output optical fibre of their correspondences, and B node control plane software module will be selected on the node wherein one of all input optical fibres of not verifying the port corresponding relation successively.If after choosing certain bar input optical fibre, control module software receives the signaling message from node A, just represent that the residing port q of this input optical fibre is corresponding with the port p that node A selects, two tuples of this corresponding port＜p, q〉be stored in the port mapping table of node A and B.The GMPLS control module needs the transmitter on the Control Node A, corresponding 1 * 2 optical switch and optical gate switch when transmitting signaling message, select the output optical fibre coupling back of appointment to transmit signaling message; Node B control optical gate switch and receiver module, selection needs the input optical fibre of appointment.So will find out all ports and connect corresponding relation through the output optical fibre on all node A of traversal.All output optical fibres that link to each other with B are all detected and verify on the A node, and LMP will provide complete port mapping table, be used for other operation of control plane.
Claims (3)
1, a kind of intelligent wavelength route optical network node apparatus of supporting LMP Link Manager Protocol, it is characterized in that on existing pure optical switching matrix, having added the transmission coupling exchange, the realization LMP Link Manager Protocol is verified the port corresponding relation between adjacent node automatically on full Optical Switch Node, transmit coupling exchange and be divided into input and output two parts, wherein the importation is by several 1 * 2 splitters, the optical gate switch of equivalent amount, star coupler and receiver are formed, output is by a 1510nm transmitter, several 1 * 2 optical switches, 1 optical gate switch and several 2 * 1 couplers are formed, in the importation, every input optical fibre of node is divided into two-way through optical branching device earlier, one the tunnel is connected with the input port of pure optical switching matrix, one end of another Lu Yuyi optical gate switch connects by optical fiber, the other end of all optical gate switches all links to each other with the input port of same star coupler by optical fiber, and the output of star coupler is connected with general multiple labeling exchange control plane software module through the 1510nm receiver; The output of control plane software module connects transmission coupling exchange output, link to each other through the input port of transmitter with 1 * 2 optical switch group, an output port of each 1 * 2 optical switch in 1 * 2 optical switch group and the output port of pure optical switching matrix are connected by optical fiber with one 2 * 1 coupler, its another output port connects the input port of next 1 * 2 optical switch, last 1 * 2 optical switch links to each other with a coupler through an optical gate switch, the output port of 2 * 1 different couplers all connects with different node output optical fibre, every the optical fiber that enters node is all told the light signal of 10% part by the optical branching device on the passage separately, enter a star coupler through the optical gate switch, the control plane software control transmits the coupling exchange importation and gathers only any one road signal, and the data that will send change into light signal through the 1510nm transmitter with the signal of telecommunication, through transmitting the output of coupling exchange output.
2, the intelligent wavelength route optical network node apparatus of support LMP Link Manager Protocol as claimed in claim 1, the message format that it is characterized in that software module control of described general multiple labeling exchange control plane and transmission is according to defined data packet format of LMP Link Manager Protocol LMP and treatment mechanism.
3, the intelligent wavelength route optical network node apparatus of support LMP Link Manager Protocol as claimed in claim 1, it is characterized in that when need not to use the transmission coupling exchange, transmit that all optical gate switches are set to off state in the coupling exchange, all 1 * 2 optical switches are set to pass-through state.
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| CN100452683C true CN100452683C (en) | 2009-01-14 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7657744B2 (en) * | 2004-08-10 | 2010-02-02 | Cisco Technology, Inc. | System and method for dynamically determining the role of a network device in a link authentication protocol exchange |
| CN100365979C (en) * | 2005-12-16 | 2008-01-30 | 江苏华山光电有限公司 | Optical exchanger for 650nm plastic optical fiber transmission system |
| CN100384155C (en) * | 2006-01-14 | 2008-04-23 | 华为技术有限公司 | Client layer chain-link automatic finding method and apparatus |
| CN101217338B (en) * | 2007-01-06 | 2012-04-25 | 华为技术有限公司 | Detection message transmitting method, network element device |
| CN101895794A (en) * | 2010-05-06 | 2010-11-24 | 浙江工业大学 | Novel optical track network node structure and FPGA implementation method thereof |
| EP2663022A1 (en) * | 2012-05-11 | 2013-11-13 | OTN Systems | A wired meshed network and a method for routing packets over a wired meshed network |
| CN104734799B (en) * | 2013-12-19 | 2017-12-15 | 华为技术有限公司 | Light architecture for exchanging |
| CN104837080B (en) * | 2015-04-27 | 2018-11-16 | 上海交通大学 | Optical switching matrix tolerant system and its fault-tolerance approach based on input terminal ring network |
| CN105282056B (en) * | 2015-11-09 | 2019-01-11 | 中国科学院计算技术研究所 | A kind of novel photoelectric hybrid switching data center network architecture |
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| JPH07307719A (en) * | 1994-05-13 | 1995-11-21 | Nec Corp | Optical network |
| JPH10271071A (en) * | 1997-03-21 | 1998-10-09 | Oki Electric Ind Co Ltd | Optical communication system |
| CN1372400A (en) * | 2002-04-02 | 2002-10-02 | 上海交通大学 | Integrated intelligent photoelectric mixed router |
| CN1424825A (en) * | 2003-01-09 | 2003-06-18 | 上海交通大学 | Shared test device and its control method for optical network link circuit connecting verification |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5285449A (en) * | 1991-04-03 | 1994-02-08 | International Business Machines Corporation | Protocol for hybrid local area networks |
| JPH07307719A (en) * | 1994-05-13 | 1995-11-21 | Nec Corp | Optical network |
| JPH10271071A (en) * | 1997-03-21 | 1998-10-09 | Oki Electric Ind Co Ltd | Optical communication system |
| CN1372400A (en) * | 2002-04-02 | 2002-10-02 | 上海交通大学 | Integrated intelligent photoelectric mixed router |
| CN1424825A (en) * | 2003-01-09 | 2003-06-18 | 上海交通大学 | Shared test device and its control method for optical network link circuit connecting verification |
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