CN1212712C - Distributed wavelength multiplexing multi-walength optical network system - Google Patents
Distributed wavelength multiplexing multi-walength optical network system Download PDFInfo
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- CN1212712C CN1212712C CNB021107009A CN02110700A CN1212712C CN 1212712 C CN1212712 C CN 1212712C CN B021107009 A CNB021107009 A CN B021107009A CN 02110700 A CN02110700 A CN 02110700A CN 1212712 C CN1212712 C CN 1212712C
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Abstract
The present invention relates to a distributed wavelength multiplexing optical network system with multi-wavelength. The system is composed of 4 distributed node regions and 1 control system, wherein each distributed node region comprises N nodes and 1 distributed node region module and each node is connected with the distributed node region module in the node region of the node via an optical fiber; each distributed node region module is directly connected with the control system and is respectively connected with the other 3 distributed node region modules; in each distributed node region, the communication of any two nodes and the communication of any two distributed node region modules are controlled by the control system. By the adoption of the comprehensive settlement proposal of a distributed structure + a feedback loop + a node packet, the present invention improves the destruction resistant performance of a network, realizes the single fiber bi-directional transmission of the network, enlarges network scale for three times under the identical condition of the allocation loss of star-shaped couplers, and realizes the wavelength multiplexing of all communication channels of the network by means of node packets so as to increase 1 to 3 times of maximal network throughput.
Description
(1) technical field
The present invention relates to a kind of distributed wavelength multiplexing multi-walength optical network system.
(2) background technology
WDM (wavelength division multiplexing) local area network (LAN) of future generation will mainly adopt star structure.Conventional WDM stellate reticulum is used widely, this WDM stellate reticulum mainly is made of symmetrical mode transmission star-type coupler, each node links to each other with a pair of port of star-type coupler by two optical fiber, the information that this node of Optical Fiber Transmission need send, another root Optical Fiber Transmission is sent to the information of this node; The transport process of information from the source node to the destination node only directly is communicated with by single channel, need not transmit by via node; It is a unidirectional single-hop WDM network system.But there is following major defect in this network system: (1) survivability is poor, if the center star-type coupler goes wrong, then whole network just will be paralysed; (2) small scale, network size are subjected to star-type coupler to distribute loss and actual in the dual restriction of limited channel wavelength number that utilizes; (3) use optical fiber oversize, each node links to each other with the center star-type coupler will be with two optical fiber.At present, although the problems referred to above have been proposed multiple solution, but existing way all has limitation separately, as: the profile star-type coupler can only solve survivability difference problem, it is oversize that the reflection-type star-type coupler can only solve optical fiber by the single fiber bi-directional transmission, Wavelength reuse scheme medium wavelength can only be reused once at most, and active extensive star-type coupler can only solve and distribute the loss problem.
(3) summary of the invention
The object of the present invention is to provide a kind of distributed wavelength multiplexing multi-walength optical network system, improve the survivability energy of network, realize the single fiber bi-directional transmission of network, and network size is enlarged, realize reusing of all communication channel wavelength of network, the network maximum throughput is increased.
A kind of distributed wavelength multiplexing multi-walength optical network system provided by the present invention, be characterized in, it is made up of 4 distribution node districts and 1 control system, each distribution node district comprises N node and 1 distribution node district module, the special-purpose adjustable transceiver of full range of data channel of each node configuration and a control channel dedicated fixed wavelength transceiver, and the distribution node district module of each node by an optical fiber and its place node area links to each other; In addition, each distribution node district module all directly links to each other with control system, the control of controlled system; Each distribution node district module all is connected with other 3 distribution node district modules respectively, and all can directly intercom mutually between any two distribution node district modules; The control of all controlled system of communication between communication in each distribution node district between any two nodes and any two the distribution node district modules, described control system is according to the communication request of each node in the network, and the data channel wavelength of whole network is divided into λ
A, λ
B, λ
C, λ
DFour set of wavelengths are sent synchronic command, make each distribution node district module carry out relevant parameters setting and synchronous operation; Meanwhile, the control channel dedicated fixed wavelength transceiver of each communication node by separately receives the control command from control system in the network, and the wavelength that also synchronously will the adjustable transceiver of the special-purpose full range of data channel separately transfers to corresponding appointment communicates.
Above-mentioned distributed wavelength multiplexing multi-walength optical network system, wherein, distribution node district module is to be connected and composed by 1 N * 6 couplers, 1 wide-band optical amplifier, 11 * 2 power splitter, 1 variable band-pass filter and 1 adjustable multiwave lengh selection routing, wherein: one side N port of N * 6 couplers is used to connect N node, and each port connects a node by an optical fiber; In 6 ports of the another side of N * 6 couplers, a port links to each other with control system, is used for each communication node and sends communication request and control system to each communication node sending controling instruction to control system; Two ports are used to form feedback loop, are are promptly connected and composed through wide-band optical amplifier, 1 * 2 power splitter, variable band-pass filter and coupler another port by coupler one port; Remaining 3 ports are connected with all the other each distribution node district modules respectively; Variable band-pass filter also directly links to each other with control system, and the control of controlled system only allows set of wavelengths λ
DBy; Adjustable multiwave lengh selection routing has an input port and 3 output ports: input port links to each other with an output port of 1 * 2 power splitter, and output port is connected with all the other each distribution node district modules respectively; Adjustable multiwave lengh selection routing also directly links to each other with control system, and the control of controlled system only allows set of wavelengths λ
A, λ
BAnd λ
CBy, and make set of wavelengths λ
A, λ
BAnd λ
CRespectively from the corresponding output of its corresponding three output ports.
Above-mentioned distributed wavelength multiplexing multi-walength optical network system, wherein, setting a node in N node of each node area is host node, and to the different priority of each host node setting, wherein, each host node all has the ability of network system being carried out control and management, and the control and management information of control system all will be shone upon to each host node.
The present invention has adopted above-mentioned technical solution, promptly both can adopt the solution of distributed frame+node grouping, can adopt the comprehensive solution of distributed frame+feedback loop+node grouping again, utilize distributed frame to improve the survivability energy of network, utilize feedback loop to realize the single fiber bi-directional transmission of network; Distributed frame combines with feedback loop, distributes under loss the same terms at star-type coupler, can make network size enlarge three times; Utilize node grouping (wavelength grouping), realize reuse (part communication channel wavelength is reused for 3 times) of all communication channel wavelength of network, make the network maximum throughput increase by 1～3 times.The present invention can better satisfy the needs that the communications industry develops rapidly.
(4) description of drawings
Fig. 1 distributed wavelength multiplexing multi-walength optical network system modular structure of the present invention schematic diagram;
Fig. 2 is the first distribution node district schematic network structure among Fig. 1;
Fig. 3 is a distributed wavelength multiplexing multi-walength optical network system structural representation of the present invention;
Fig. 4 Wavelength reuse and node grouping schematic diagram.
(5) embodiment
Fig. 1 is modular structure figure of the present invention.Whole distributed wavelength multiplexing multi-walength optical network is made up of 1,2,3,4 and 1 control system 5 in 4 distribution node districts, each distribution node district comprises: N node and 1 distribution node district module, and each node links to each other by the distribution node district module of an optical fiber and its place node area; Each distribution node district module all directly links to each other with control system 5,5 controls of controlled system; Any one distribution node district module all is connected with other 3 distribution node district modules respectively, all can directly intercom mutually between any two distribution node district modules; Since the control of all controlled system of the operation of each distribution node district module, therefore, 5 controls of all controlled system of the communication between the communication in each distribution node district between any two nodes and any two the distribution node district modules.
Fig. 2 is the network structure in the first distribution node district 1 of the present invention.4 distribution node district modules are arranged in the whole distributed wavelength multiplexing multi-walength optical network, and the structure of each distribution node district module is all identical.Here, network configuration with the first distribution node district 1 is the structure that example illustrates network distribution node district module among the present invention: the first distribution node district of network comprises N node and 1 distribution node district module 10, and each node links to each other with the first distribution node district module 10 by an optical fiber; The first distribution node district module is connected and composed by 1 N * 6 couplers (1#), 1 wide-band optical amplifier (OA), 11 * 2 power splitter, 1 variable band-pass filter (TBPF1#) and 1 adjustable multiwave lengh selection routing (TWR1#).For N * 6 coupler 1#, its N port on one side is used for connected node, and each port connects a node by an optical fiber; In 6 ports of another side, a port links to each other with control system 5, so that each communication node sends communication request and control system to each communication node sending controling instruction to control system 5; Two ports are used to form feedback loop, the feedback loop 1 among the figure by the port one 1 of coupler 1# ', the port one 2 of image intensifer OA, 1 * 2 power splitter, TBPF1# and coupler 1# ' connect and compose; The effect of feedback loop 1 is: make with N node that coupler 1# links to each other between intercommunication mutually become possibility, that is: realize that the single fiber bi-directional of network transmits.Remaining 3 ports are connected with the 4th distribution node district module 40 with the second distribution node district module 20, the 3rd distribution node district module 30 respectively.TBPF1# directly links to each other with control system, the control of controlled system; In service, according to the control system instruction, TBPF1# only allows set of wavelengths λ
D(annotate: the definition of set of wavelengths will provide in the back) passes through.TWR1# has an input port and 3 output ports (port A, B and C); Input port links to each other with an output port of 1 * 2 power splitter, and output port A, B are connected with the second distribution node district module, the 4th distribution node district module and the 3rd distribution node district module respectively with C; TWR1# also directly links to each other with control system, the control of controlled system; In service, according to the control system instruction, TWR1# only allows set of wavelengths λ
A, λ
BAnd λ
CBy, and make them respectively from its corresponding output port A, B and C output.
Fig. 3 is the system construction drawing of the present invention's " distributed wavelength multiplexing multi-walength optical network ", and it is is mainly connected and composed by 4 N * 6 couplers, 4 TWR, 4 TBPF, 41 * 2 power splitters and 1 control system etc.Each N * 6 couplers provide on one side 6 ports to be used for interconnecting, constituting feedback loop and link to each other with control system between each device; The N of an another side port is used for connected node, and each port connects a node by an optical fiber, can connect N node altogether; The node number that whole network is supported is 4N.For each node, dispose the special-purpose adjustable transceiver of full range of a data channel and a control channel dedicated fixed wavelength transceiver.When each node sent data, the receiver that its transmitter transfers to that wavelength and reception data adopted that wavelength to determine by control system.4 feedback loops are arranged among the figure, and the effect of feedback loop 1 is that as previously mentioned other feedback loop has similar effect.Consider that each communication channel wavelength all wants to bring bigger power loss, 1 * 2 power splitter will bring the insertion loss of power loss, TBPF or the insertion loss of TWR by N * 6 couplers twice, thereby in link, added image intensifer and carry out power back-off.The parameter of 4 TBPF is provided with identical, and concrete numerical value and variation synchronously thereof determine by control system.4 TWR also directly link to each other with control system, and the setting of all parameters and variation are synchronously also all determined by control system; And the operation of each TBPF and each TWR is also all synchronous.Output port A, the B of TWR1#, C respectively with the port 21 of coupler 2# ', the port 41 of coupler 4# ', the port 31 of coupler 3# ' link to each other; Output port A, the B of TWR2#, C respectively with the port one 3 of coupler 1# ', the port 32 of coupler 3# ', the port 42 of coupler 4# ' link to each other; Output port A, the B of TWR3#, C respectively with the port 43 of coupler 4# ', the port 24 of coupler 2# ', the port one 4 of coupler 1# ' link to each other; Output port A, the B of TWR4#, C respectively with the port 35 of coupler 3# ', the port one 5 of coupler 1# ', the port 25 of coupler 2# ' link to each other.Each N * 6 couplers all link to each other a port in its 6 ports on one side with control system, be used for each communication node and send communication request and control system to each node sending controling instruction by control channel to control system; Control system is according to the communication request of each node in the network, and the data channel wavelength of whole network is divided into λ
A, λ
B, λ
C, λ
DFour set of wavelengths are sent synchronic command, make each TBPF and each TWR carry out relevant parameters setting and synchronous operation; 4 TBPF only allow set of wavelengths λ
DBy; Each TWR only allows set of wavelengths λ
A, λ
BAnd λ
CBy, and make set of wavelengths λ
A, λ
BAnd λ
CRespectively from its corresponding output port A, B and C output.Meanwhile, the control channel receiver of each communication node by separately receives the control command from control system in the network, and the wavelength that also synchronously will the adjustable transceiver of data channel full range separately transfers to corresponding appointment communicates.
In order to improve the survivability energy of network, selected node is a host node in N node of each node area, and each host node all has the ability of network system being carried out control and management, sets different priority for the host node of the different node area of four networks.In the network operation, the control and management information of network control system all will be shone upon and be given each host node; In case network control system goes wrong in the communication, four the highest host nodes of host node medium priority will be born the control and management responsibility to whole network automatically; If the highest host node of priority this moment is also out of joint, then the host node that takes second place of priority will be born the control and management responsibility to whole network automatically, and the like.From the network architecture of Fig. 3 as can be known, each node area both connected each other, had relative independentability again, and each node area can independently become net.In the communication, if certain N * 6 couplers go wrong, only influence between this N * each node of 6 couplers node area of living in and the communicating by letter of this node area and other node area, communication to the network others part does not have influence, that is: N * 6 couplers go wrong and only influence the communication of network 1/4th nodes.This shows, more conventional WDM stellate reticulum, it is many that the survivability of distributed wavelength multiplexing multi-walength optical network of the present invention can be eager to excel.
In the practical application, the node number that each node area connected is flexible as required, needn't be identical.
Fig. 4 is that the present invention's's " distributed wavelength multiplexing multi-walength optical network " system wavelength is reused and the node grouping schematic diagram.As shown in Figure 4, the node of 4N in the network is divided into 4 groups, every group of N node; Order is the 1st group node with N the node that coupler 1# directly links to each other; The 2nd, 3,4 group nodes are in like manner arranged.The control channel wavelength X of a special use of network configuration
K, the fixed wave length transceiver of each node all uses this wavelength.If the spendable data channel number of wavelengths of network is m, as from the foregoing, m data channel wavelength is divided into again: λ
A, λ
B, λ
C, λ
DFour set of wavelengths.The concrete distribution that how much reaches wavelength of each set of wavelengths medium wave long number is by the communication request situation decision of control system according to each node in the network.Because each internodal communication is dynamic change in the network, so number of wavelengths in node number in each groups of nodes and node distribution thereof, each set of wavelengths and Wavelength distribution thereof also are dynamic changes.As shown in Figure 3, synchronization can not have two identical data channel wavelength to arrive the receiver of same node, thereby can not cause communication channel conflict or confusion.The situation of reusing of network medium wavelength as shown in Figure 4, communicating by letter between the 1st group node and the 2nd group node used set of wavelengths λ
A, each node that desire sends data set of wavelengths λ that vies each other
AIn the right to use of each wavelength so that send separately data; Meanwhile, communicating by letter between the 3rd group node and the 4th group node also used set of wavelengths λ
A, also there is similar competition in each internodal communication.In like manner, between the 1st group node and the 4th group node communicate by letter and the 2nd group node and the 3rd group node between communicate by letter and can use set of wavelengths λ simultaneously
B, between the 1st group node and the 3rd group node communicate by letter and the 2nd group node and the 4th group node between communicate by letter and can use set of wavelengths λ simultaneously
C, each node of desire communication to the usufructuary competition of data channel wavelength also with top similar.1st, in 2,3,4 group nodes, the communication between inner each node of every group node can be used set of wavelengths λ simultaneously
DThis shows set of wavelengths λ
A, λ
B, λ
CIn each wavelength can be used for 2 nodes simultaneously and send data, that is: each wavelength is all reusable 1 time; And set of wavelengths λ
DIn each wavelength can be used for 4 nodes simultaneously and send data, that is: each wavelength is all reusable 3 times.
Two kinds of special cases.In 4 groups of nodes of network,, there are not intercommunication, that is: set of wavelengths λ mutually between inner each node of each groups of nodes if internodal communication all occurs between each groups of nodes
DIn number of wavelengths be 0; M data channel wavelength of whole network all can obtain 1 time and reused this moment, and the maximum throughput of network reaches 2m, compares with conventional WDM stellate reticulum, and the maximum throughput of network has increased by 1 times.On the contrary, if internodal communication all occurs between inner each node of each groups of nodes, do not take place and there is intercommunication mutually between each groups of nodes, that is: set of wavelengths λ
DIn number of wavelengths be m, m data channel wavelength of whole network all can obtain 3 times and reused this moment, the maximum throughput of network reaches 4m, compares with conventional WDM stellate reticulum, the maximum throughput of network has increased by 3 times.Usually, all have communication to take place between each groups of nodes and between inner each node of each groups of nodes, at this moment, the network maximum throughput is 2m～4m, compares with conventional WDM stellate reticulum, and the maximum throughput of network increases by 1～3 times.
In sum, the advantage of distributed wavelength multiplexing multi-walength optical network system of the present invention is: the survivability of (1) network is strong, and certain N * 6 couplers go wrong and only influence the communication of network 1/4th nodes; (2) distribute under the identical condition of loss at coupler, the node number that network connected reaches four times of conventional WDM stellate reticulum; On the contrary, under number of network node the same terms, can reduce the coupler scale greatly, distribute loss, and then reduce the performance requirement of network, reduce network cost the node transceiver thereby reduce coupler; (3) by the single fiber bi-directional transmission, under number of network node the same terms, can save half optical fiber; Under port number the same terms of network coupled connected node that device provides, network size is expanded be twice; (4), under network communication channels number of wavelengths the same terms, can make the maximum throughput of network increase by 1～3 times by Wavelength reuse; Under network size the same terms, can significantly reduce the queuing delay of network node, alleviate between each communication node the usufructuary competition conflict of data channel wavelength, improve network performance effectively.
Claims (3)
1. distributed wavelength multiplexing multi-walength optical network system, it is characterized in that, it is made up of 4 distribution node districts and 1 control system, each distribution node district comprises N node and 1 distribution node district module, the special-purpose adjustable transceiver of full range of data channel of each node configuration and a control channel dedicated fixed wavelength transceiver, and the distribution node district module of each node by an optical fiber and its place node area links to each other; In addition, each distribution node district module all directly links to each other with control system, the control of controlled system; Each distribution node district module all is connected with other 3 distribution node district modules respectively, and all can directly intercom mutually between any two distribution node district modules; The control of all controlled system of communication between communication in each distribution node district between any two nodes and any two the distribution node district modules,
Described control system is according to the communication request of each node in the network, and the data channel wavelength of whole network is divided into λ
A, λ
B, λ
C, λ
DFour set of wavelengths are sent synchronic command, make each distribution node district module carry out relevant parameters setting and synchronous operation; Meanwhile, the control channel dedicated fixed wavelength transceiver of each communication node by separately receives the control command from control system in the network, and the wavelength that also synchronously will the adjustable transceiver of the special-purpose full range of data channel separately transfers to corresponding appointment communicates.
2. a kind of distributed wavelength multiplexing multi-walength optical network system according to claim 1, it is characterized in that, described distribution node district module is to be connected and composed by 1 N * 6 couplers, 1 wide-band optical amplifier, 11 * 2 power splitter, 1 variable band-pass filter and 1 adjustable multiwave lengh selection routing, wherein:
One side N port of N * 6 couplers is used to connect N node, and each port connects a node by an optical fiber; In 6 ports of the another side of N * 6 couplers, a port links to each other with control system, is used for each communication node and sends communication request and control system to each communication node sending controling instruction to control system; Two ports are used to form feedback loop, are are promptly connected and composed through wide-band optical amplifier, 1 * 2 power splitter, variable band-pass filter and coupler another port by coupler one port; Remaining 3 ports are connected with all the other each distribution node district modules respectively;
Variable band-pass filter also directly links to each other with control system, and the control of controlled system only allows set of wavelengths λ
DBy;
Adjustable multiwave lengh selection routing has an input port and 3 output ports: input port links to each other with an output port of 1 * 2 power splitter, and output port is connected with all the other each distribution node district modules respectively; Adjustable multiwave lengh selection routing also directly links to each other with control system, and the control of controlled system only allows set of wavelengths λ
A, λ
BAnd λ
CBy, and make set of wavelengths λ
A, λ
BAnd λ
CRespectively from the corresponding output of its corresponding three output ports.
3. a kind of distributed wavelength multiplexing multi-walength optical network system according to claim 1 is characterized in that,
Setting a node in N node of each node area is host node, and to the different priority of each host node setting, wherein, each host node all has the ability of network system being carried out control and management, and the control and management information of control system all will be shone upon to each host node.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021107009A CN1212712C (en) | 2002-01-30 | 2002-01-30 | Distributed wavelength multiplexing multi-walength optical network system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021107009A CN1212712C (en) | 2002-01-30 | 2002-01-30 | Distributed wavelength multiplexing multi-walength optical network system |
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| CN1435965A CN1435965A (en) | 2003-08-13 |
| CN1212712C true CN1212712C (en) | 2005-07-27 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006211591A (en) * | 2005-01-31 | 2006-08-10 | Fujitsu Ltd | Optical network system and transmission device |
| US20060257145A1 (en) * | 2005-05-10 | 2006-11-16 | Nuzman Carl J | Multi-hop optical communication network |
| CN107528609B (en) * | 2017-10-20 | 2019-05-31 | 北京凤凰汇通科技有限公司 | Wireless communication system |
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