CN1428959A - Double-way wave division multiplex optical network system - Google Patents
Double-way wave division multiplex optical network system Download PDFInfo
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- CN1428959A CN1428959A CN01139211A CN01139211A CN1428959A CN 1428959 A CN1428959 A CN 1428959A CN 01139211 A CN01139211 A CN 01139211A CN 01139211 A CN01139211 A CN 01139211A CN 1428959 A CN1428959 A CN 1428959A
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Abstract
A bidirectional wavelength division multiplexing optical network system is formed from a wavelength route module, a controller, two NX4 couplers and 2N nodes which are connected. Every NX4 coupler can be respectively connected with N nodes, and can provide a port for interconnecting with controller, the information transfer between two NX4 couplers is implemented by connecting wavelength route module between them, are formed into straight-through state, and the wavelength route module is connected with controller directly. Said invention adopts the network structure of "feedback loop-wavelength route-note grouping" and utilizes the "feedback loop" to implement single-fibre bidirectional transmission of network, and utilizes the "wavelength route and note grouping" to implement the reuse of all the network communication channel wavelengths.
Description
(1) technical field
The present invention relates to a kind of double-way wave division multiplex optical network system.
(2) background technology
The existing conventional WDM star network is subjected to the mode transmission star-type coupler to distribute loss and actual in the dual restriction of limited channel wavelength number that utilizes, and its scale can't adapt to the demand of following big capacity wavelength division multiplexing local area network (LAN).In addition, because each node will link to each other with the center star-type coupler with two optical fiber in the conventional wavelength division multiplexing stellate reticulum, thereby also there is network used " optical fiber is long " problem.Current, in solution of the above problems, often can only solve with regard to problem in a certain respect, as: active extensive star-type coupler can only solve " distribution loss " problem; The reflection-type star-type coupler only solves " optical fiber is long " problem; The double star structure of Wavelength reuse then can only partly solve " the wavelength channel number is limited " problem.Therefore, above-mentioned each method all can not be dealt with problems fully and effectively.
(3) summary of the invention
The object of the present invention is to provide a kind of double-way wave division multiplex optical network system, by reusing of all-network communication channel wavelength network maximum throughput and node number are doubled simultaneously with single fiber bi-directional transmission, and then overcome the above-mentioned defective of conventional WDM star network system fully and effectively, simultaneously the survivability of network can be improved.
A kind of double-way wave division multiplex optical network system provided by the present invention, it is connected and composed by a wavelength routing module, a controller, two N * 4 couplers and 2N node, 2N corresponding each coupler of node is divided into two sets of node, i.e. the 1st set of node and the 2nd set of node, in the communication, each set of node also comprises two groups of nodes respectively; Wherein: each N * 4 couplers can connect N node separately, and each node is to link to each other with a port of N * 4 couplers by an optical fiber; Each N * 4 couplers all provide the interconnection of a port and controller, so that controller is controlled each communication node during network service; The wavelength routing module directly links to each other with controller, and is controlled by the controller; Information transmission between two N * 4 couplers is to be communicated with by the wavelength routing module, and is pass-through state.
Above-mentioned double-way wave division multiplex optical network system, wherein, the wavelength routing module is by two 1 * 2 adjustable multiwave lengh selection routings, two image intensifers are formed, and form the two cover symmetries that respectively comprise a feedback loop and a connecting path and be connected optical channel, every cover connects in the optical channel, after connecting an image intensifer and an adjustable multiwave lengh selection routing successively by a port of a coupler, be back to the another port of this coupler respectively and constitute feedback loop and connecting path respectively until a port of another coupler, wherein: the communication between N the node that feedback loop makes with this coupler directly links to each other becomes possibility; Connecting path is used to transmit the 1st set of node and issues the information that the 2nd set of node and the 2nd set of node are issued the 1st set of node, and in addition, described two adjustable multiwave lengh selection routings directly link to each other with controller.
Above-mentioned double-way wave division multiplex optical network system, wherein, controller is the communication request according to each communication node of network, sends control command by network-specific control channel wavelength, the wavelength that makes each communication node transfer to corresponding appointment communicates; The communication channel wavelength of whole network is divided into λ
AAnd λ
BTwo set of wavelengths, and control the parameter setting and the synchronous operation state thereof of two adjustable multiwave lengh selection routings simultaneously make λ
AAnd λ
BTwo set of wavelengths are successfully exported from their corresponding port.
Above-mentioned double-way wave division multiplex optical network system, wherein, λ
ASet of wavelengths is used for sending data between in one group of the 1st set of node and the 2nd set of node one group; λ
BSet of wavelengths is used for the communicating by letter of another each node of group inside in inner and the 2nd set of node of another group of the 1st set of node simultaneously, that is: all communication channels are all reused in the network.
Above-mentioned double-way wave division multiplex optical network system wherein, is confined to the right to use of this group node inside wavelength to the data channel wavelength right to use during each node desire communication.
Above-mentioned double-way wave division multiplex optical network system, wherein, each node comprises optical sender, optical receiver, Y shape fiber coupler, and a special-purpose adjustable transceiver of full range of data channel and a control channel dedicated fixed wavelength transceiver, wherein: Y shape fiber coupler, be used for the output signal of optical sender is coupled to N * 4 couplers, and the N * light signal of 4 couplers output is coupled in the optical receiver and goes, makes simultaneously between optical sender and the optical receiver and obtain good isolation.
Above-mentioned double-way wave division multiplex optical network system, wherein, when each node sent data, the wavelength that the receiver of wavelength that described transmitter transfers to and reception data adopts was determined according to the signal intelligence of network by controller.
Owing to adopted above-mentioned technical solution, that is: the network configuration of " feedback loop+wavelength route+node grouping ", utilize " feedback loop " to realize the single fiber bi-directional transmission of network, like this, network size is expanded be twice, also overcome the long problem of the used optical fiber of conventional wavelength division multiplexing stellate reticulum simultaneously; Utilize " wavelength route+node grouping " to realize reusing of all-network communication channel wavelength, the network maximum throughput is doubled; Utilize image intensifer to compensate the wavelengthtunable router and insert loss and star-type coupler distribution loss.Double-way wave division multiplex optical network system of the present invention has been realized reusing of overall network communication channel wavelength.
(4) description of drawings
Fig. 1 is a double-way wave division multiplex optical network system modular structure block diagram of the present invention;
Fig. 2 is the concrete structure block diagram of double-way wave division multiplex optical network system of the present invention;
Fig. 3 is Wavelength reuse of the present invention and node grouping schematic diagram.
(5) embodiment
As shown in Figure 1, the present invention, i.e. double-way wave division multiplex optical network system is connected and composed by a wavelength routing module 1, controller 4, two N * 4 couplers 2 and plurality of nodes 3.Two N * 4 couplers 2 are connected by wavelength routing module 1, directly do not connect each other, information transmission between them wants approach wavelength routing module 1 to carry out: in this information is transmitted, be in pass-through state during information via wavelength routing module 1, need not transmit by wavelength routing module 1; Each N * 4 couplers 2 can connect N node 3 separately, and each node 3 links to each other with a port of N * 4 couplers 2 by an optical fiber; In addition, each N * 4 couplers 2 all provide a port and controller 4 interconnection, so that 4 pairs of each communication nodes 3 of controller are controlled during network service.Wavelength routing module 1 directly links to each other with controller 4, and 4 controls of controlled device.
As shown in Figure 2, double-way wave division multiplex optical network system concrete structure block diagram of the present invention, it is is mainly connected and composed by two N * 4 coupler 2, two 11, controllers 4 of 12, two image intensifers of 1 * 2 adjustable multiwave lengh selection routing (TWR) (OA) and 2N node.Each N * 4 couplers 2 provide on one side 4 ports to be used for interconnecting, constituting feedback loop and link to each other with controller 4 between each device; The N of an another side port is used for connected node 3, and each port connects a node 3 by an optical fiber, can connect N node 3 altogether; Therefore, the node number supported of whole network is 2N.Consider that input/output signal is a transmitted in both directions in an optical fiber, for the output signal with optical sender (T) 31 is coupled to N * 4 couplers 2, and the light signal of N * 4 couplers 2 outputs is coupled in the optical receiver (R) 32 goes, make simultaneously between optical sender 31 and the optical receiver 32 and obtain good isolation, increase a YXing Ouheqi (Y) 33 at each node 3 place.Two transceivers of each node 3 configuration: the adjustable transceiver of the special-purpose full range of communication channel, that is: a wavelengthtunable transmitter and a wavelengthtunable receiver; A control channel dedicated fixed wavelength transceiver, that is: a fixed wavelength transmitter and a fixed wave length receiver.When each node 3 sent data, the receiver 32 that its transmitter 31 transfers to that wavelength and reception data adopted those wavelength by controller 4 decisions.In the network, a fixing control channel wavelength dedicated (λ is set
K), in order to make full use of communication channel wavelength limited in the optical amplifier bandwidth, the control channel wavelength can adopt the rectangular formula of band external wave; Each node 3 that desire sends data sends communication request and controller 4 to controller 4 and sends Synchronization Control instruction to each node 3 and all use this control channel wavelength dedicated (λ
K).2 feedback loops are arranged: feedback loop 1 and feedback loop 2 among Fig. 2; Feedback loop 1 is connected and composed by the port one 1 ' of port one 2 ', image intensifer (OA) 11, TWR12 (1#) and the coupler 2 (1#) of coupler 2 (1#); Feedback loop 2 has similar structure.Be the effect that example illustrates feedback loop with feedback loop the 1, the 1st set of node and the 2nd set of node (back will provide the explanation of relevant set of node) below:, but can not mail to (N-1) the in addition individual node that is in the 1st set of node together because any one node can mail to all nodes in the 2nd set of node with information by TWR12 (1#) in the 1st set of node; Simultaneously, any one node in the 1st set of node can receive from the information of all nodes in the 2nd set of node (by way of TWR12 (2#)), but can't receive the information from (N-1) the in addition individual node that is in the 1st set of node together.For this reason, at coupler 2 (1#) one side leave two ports: 11 ' and 12 ', be used to form feedback loop 1.The information of certain node emission enters behind the coupler 2 (1#) again from its port one 2 ' output in the 1st set of node, information is fed back to again in the coupler 2 (1#) through feedback loop 1, arrives other (N-1) individual node in the 1st set of node through it again; So just realized the desired information transmission.In like manner, feedback loop 2 plays similarly effect.2 connecting paths are arranged: connecting path 1 and connecting path 2 among Fig. 2; Connecting path 1 is connected and composed by the port 21 ' of port one 2 ', image intensifer (OA) 11, TWR12 (1#) and the coupler 2 (2#) of coupler 2 (1#), and its effect is to transmit the information that the 1st set of node is issued the 2nd set of node; Connecting path 2 has similar 26S Proteasome Structure and Function.Consider that all light waves all want to exist power loss and TWR12 to exist by N * 4 couplers 2 twice and insert loss, insert an image intensifer 11 in each TWR front and carry out power back-off.Each N * 4 couplers 2 all with its on one side in 4 ports link to each other with controller, be used for each node 3 and send communication request and controller 4 to each node 3 sending controling instruction to controller 4 by control channel; Controller 4 is according to the communication request situation of each node 3 in the network, and the communication channel wavelength of whole network is divided into λ
AAnd λ
BTwo set of wavelengths are sent synchronic command, make two TWR12 make relevant parameters setting and synchronous operation; So that λ
AAnd λ
BTwo set of wavelengths are successfully from its corresponding two port A and B output.Simultaneously, each communication node receives the control command of self-controller by control channel receiver separately in the network, and the wavelength that also synchronously will the adjustable transceiver of communication channel full range separately transfers to corresponding appointment communicates.
Fig. 3 is the Wavelength reuse characteristic schematic diagram of double-way wave division multiplex optical network system of the present invention, the wavelength of reusable overall network communication channel.In the network, 2N node is divided into 2 sets of node, and N the node that order links to each other with coupler 2 (1#) is the 1st set of node 301, and N the node that links to each other with coupler 2 (2#) is the 2nd set of node 302, as shown in Figure 3.Because communication both can take place between inner each node of each set of node, also can between each node between two sets of node, take place, thereby again each set of node is divided into 2 groups of nodes, if in the 1st set of node 301, only each node of communicating by letter with the node in the 2nd set of node 302 is the 1st group node, is the 1st with inner other node generation nodes in communication of self the 1st set of node only ' group node; In the 2nd set of node, only each node of communicating by letter with the node in the 1st set of node is the 2nd group node, is the 2nd with inner other node generation nodes in communication of self the 2nd set of node only ' group node.
Wavelength reuse.If the spendable communication channel number of wavelengths of whole network is m, m communication channel wavelength of whole network is divided into λ
AAnd λ
BTwo set of wavelengths; During communication, λ
ASet of wavelengths is used for the 1st group node and sends data to the 2nd group node, simultaneously, and λ
ASet of wavelengths also is used for the 2nd group node and sends data to the 1st group node; Obviously, the 1st ' communication and the 2nd of inner each node of group node ' inner the communicating by letter of each node of group node can use λ simultaneously
BSet of wavelengths, so, λ
AAnd λ
BSet of wavelengths is all reused, and promptly all communication channels are all reused in the network, and thus, the maximum throughput of network has increased by one times, as shown in Figure 3.At this moment, usufructuary competition is confined to the usufructuary competition of this group node inside wavelength to certain node of desire communication to the communication channel wavelength, and this node must not use the wavelength outside the respective wavelength group to send data.Because the signal intelligence in the network between each node is constantly to change, therefore, the quantity of node and specifically to be made of etc. those nodes all be dynamic change in every group node; In addition, because the whole communication channel wavelength (m) of network is divided into λ
AAnd λ
BTwo set of wavelengths, so, the number of wavelengths in each set of wavelengths and specifically to be made up of those wavelength also be dynamic change.But all these variations all are controlled by the controller, by the communication conditions decision of controller according to each node in the network at that time.
In sum, the advantage of double-way wave division multiplex optical network system of the present invention is: (1) under the constant condition of star-type coupler scale, by the single fiber bi-directional transmission, the node number that network is supported has increased by one times; (2) power back-off by image intensifer under the constant condition of star-type coupler scale, can reduce the power budget requirement of network to the node transceiver to a certain extent, thereby reduce network cost; Under the certain condition of network node transceiver performance, the star-type coupler scale is further enlarged, and then the node number that network is supported is further increased; (3) all communication channel wavelength of network are all reused, and the maximum throughput of network is corresponding to have increased by one times; (4) under number of network node the same terms,, can save half optical fiber by the single fiber bi-directional transmission; (5) survivability of network is enhanced, and by Fig. 2 structure as can be known: a certain star-type coupler breaks down during as if network service, and it can only influence the communication of half coupled network node, and the communication of second half network node is unaffected; (6) network configuration is simple, and is easy to implement.
Claims (7)
1. double-way wave division multiplex optical network system, it is characterized in that, it is connected and composed by a wavelength routing module, a controller, two N * 4 couplers and 2N node, 2N corresponding each coupler of node is divided into two sets of node, i.e. the 1st set of node and the 2nd set of node, in the communication, each set of node also comprises two groups of nodes respectively; Wherein:
Each N * 4 couplers can connect N node separately, and each node is to link to each other with a port of N * 4 couplers by an optical fiber;
Each N * 4 couplers all provide the interconnection of a port and controller, so that controller is controlled each communication node during network service;
The wavelength routing module directly links to each other with controller, and is controlled by the controller;
Information transmission between two N * 4 couplers is to be communicated with by the wavelength routing module, and is pass-through state.
2. a kind of double-way wave division multiplex optical network system according to claim 1, it is characterized in that, described wavelength routing module is by two 1 * 2 adjustable multiwave lengh selection routings, two image intensifers are formed, and form the two cover symmetries that respectively comprise a feedback loop and a connecting path and be connected optical channel, every cover connects in the optical channel, after connecting an image intensifer and an adjustable multiwave lengh selection routing successively by a port of a coupler, be back to the another port of this coupler respectively and constitute feedback loop and connecting path respectively until a port of another coupler, wherein: the communication between N the node that feedback loop makes with this coupler directly links to each other becomes possibility; Article two, connecting path is respectively applied for transmission the 1st set of node and issues the information of the 2nd set of node and the information that the 2nd set of node is issued the 1st set of node, and in addition, described two adjustable multiwave lengh selection routings directly link to each other with controller, and are controlled by the controller.
3. a kind of double-way wave division multiplex optical network system according to claim 1, it is characterized in that, described controller is the communication request according to each communication node of network, sends control command by network-specific control channel wavelength, and the wavelength that makes each communication node transfer to corresponding appointment communicates; The communication channel wavelength of whole network is divided into λ
AAnd λ
BTwo set of wavelengths, and control the parameter setting and the synchronous operation state thereof of two adjustable multiwave lengh selection routings simultaneously make λ
AAnd λ
BTwo set of wavelengths are successfully exported from their corresponding port.
4. a kind of double-way wave division multiplex optical network system according to claim 3 is characterized in that λ
ASet of wavelengths is used for sending data between in one group of the 1st set of node and the 2nd set of node one group; λ
BSet of wavelengths is used for the communicating by letter of another each node of group inside in inner and the 2nd set of node of another group of the 1st set of node simultaneously, that is: all communication channels are all reused in the network.
5. a kind of double-way wave division multiplex optical network system according to claim 1 is characterized in that, during each node desire communication the data channel wavelength right to use is confined to the right to use of this group node inside wavelength.
6. a kind of double-way wave division multiplex optical network system according to claim 1, it is characterized in that, described each node comprises optical sender, optical receiver, Y shape fiber coupler, and a special-purpose adjustable transceiver of full range of data channel and a control channel dedicated fixed wavelength transceiver, wherein:
Y shape fiber coupler is used for the output signal of optical sender is coupled to N * 4 couplers, and the N * light signal of 4 couplers output is coupled in the optical receiver and goes, makes simultaneously between optical sender and the optical receiver and obtain good isolation.
7. a kind of double-way wave division multiplex optical network system according to claim 6, it is characterized in that, when each node sent data, the wavelength that the receiver of wavelength that described transmitter transfers to and reception data adopts was determined according to the signal intelligence of network by controller.
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| CN01139211A CN1428959A (en) | 2001-12-26 | 2001-12-26 | Double-way wave division multiplex optical network system |
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| CN01139211A CN1428959A (en) | 2001-12-26 | 2001-12-26 | Double-way wave division multiplex optical network system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005022782A1 (en) * | 2003-09-01 | 2005-03-10 | Fiberhome Telecommunication Technologies Co., Ltd. | An exchange structure and a method of connection configuration between the optical networks |
| US7778162B2 (en) | 2002-11-06 | 2010-08-17 | Wuhan Fiberhome Networks Co. Ltd. | Multiple service ring of N-ringlet structure based on multiple FE, GE and 10GE |
| CN109861755A (en) * | 2017-11-03 | 2019-06-07 | 波音公司 | Two-way multi-wavelength kilomegabit fiber optic network |
-
2001
- 2001-12-26 CN CN01139211A patent/CN1428959A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7778162B2 (en) | 2002-11-06 | 2010-08-17 | Wuhan Fiberhome Networks Co. Ltd. | Multiple service ring of N-ringlet structure based on multiple FE, GE and 10GE |
| WO2005022782A1 (en) * | 2003-09-01 | 2005-03-10 | Fiberhome Telecommunication Technologies Co., Ltd. | An exchange structure and a method of connection configuration between the optical networks |
| CN109861755A (en) * | 2017-11-03 | 2019-06-07 | 波音公司 | Two-way multi-wavelength kilomegabit fiber optic network |
| CN109861755B (en) * | 2017-11-03 | 2023-04-07 | 波音公司 | Method and data transmission system for enabling bidirectional full duplex data transmission |
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