CN102427567A - Asynchronous multi-wavelength mesh network adaptive node system based on optical packet switching - Google Patents
Asynchronous multi-wavelength mesh network adaptive node system based on optical packet switching Download PDFInfo
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- CN102427567A CN102427567A CN2011104167429A CN201110416742A CN102427567A CN 102427567 A CN102427567 A CN 102427567A CN 2011104167429 A CN2011104167429 A CN 2011104167429A CN 201110416742 A CN201110416742 A CN 201110416742A CN 102427567 A CN102427567 A CN 102427567A
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Abstract
The invention provides an asynchronous multi-wavelength mesh network adaptive node system based on optical packet switching. The system comprises N access users (U) and consists of an optical wavelength division multiplexer, an optical beam splitter, an optical wavelength division demultiplexer, an optical fiber delay line, an optical conflict resolution and switching matrix and a control processing matrix. Input user data is demultiplexed by the optical wavelength division demultiplexer and is subjected to corresponding route selection and addressing on the optical conflict resolution and switching matrix, and a data packet is transmitted to a corresponding destination port. The node has a compact structure, the switching efficiency can be improved, time delay and a blocking rate are greatly reduced, multicast and broadcast are supported simultaneously, and storage and computation pressure of a whole network consisting of the nodes can be reduced.
Description
Technical field
The present invention relates to communication technical field.Be specifically related to a kind of asynchronous multi-wavelength mesh network adaptive session dot system based on the light packet switching.
Background technology
In several years in past; Along with the information network that with Internet is the master is growing; Number of users in the network and the sharp increase of website number, IP operation, at a high speed, big capacity real time data, video, interactive application and the demand of sharing increasing rapidly, the demand of bandwidth is also sharply increased.The development of Fibre Optical Communication Technology reduces the pressure of bandwidth resources, can satisfy the requirement that network increases bandwidth, however the integral pressure of network still exist, concentrate on mainly that internodal exchange efficiency is low, time delay is big, blocking rate is high.In the evolution of Fibre Optical Communication Technology; Optical circuit exchange (OCS), light burst-switched (OBS), light packet switching (OPS) or the like data exchange ways has successively appearred; Attempt between node, to set up permanent static light path link based on every link of network of OCS, be applicable to the transfer of data that throughput is bigger, and static characteristic makes the link holding time high; The time that can reuse is low, can't satisfy the demand of user's burst service.Network based on OBS both can satisfy the demand that adopts high throughput transmission high amount of traffic; The demand of the low-volume traffic stream of the low time delay of can satisfying the demand again, but every link needs budget allocation, shifts to an earlier date estimated time; And the user data of burst need be assembled; Can introduce bigger burst assembling time delay, still have higher blocking rate, can not satisfy low time delay real-time requirement.
Summary of the invention
The present invention provides a kind of can reduce time delay, satisfies the sudden requirement of network access user end, improves the mesh network asynchronous optical packet switching adaptive session point apparatus of network link and node utilance.
Realize that technical scheme of the present invention is following:
Node is by control unit 1
1, light conflict solution and crosspoint 1
2, optical multiplexer 1
3, beam splitter 1
4, edge router 1
5, fiber delay line 1
6, optical demultiplexer 1
7Form.Insert user's data through edge router 1
5Transmitting terminal and optical multiplexer 1
3Input connect, be used for multipath light signal adopted that dense wave division multipurpose (DWDM) technology is multiplexing advances optical fiber, optical multiplexer 1
3Output through optical fiber and beam splitter 1
4 Connect beam splitter 1
4Output and optical demultiplexer 1
7Input connect optical demultiplexer 1
7The output multiple signals that contain data packet header that will separate be delivered to control unit 1
1, beam splitter 1
4Another output with through fiber delay line 1
6With optical demultiplexer 1
7Input connect optical demultiplexer 1
7Output conflict with light solution and crosspoint 1
2Connect, the multichannel data packet signal that separates is delivered to light conflict solution and crosspoint 1
2 Beam splitter 1
4Be used for data-signal is separated with the data packet header control signal.Control unit 1
1Control signal output ends conflict with light solution and crosspoint 1
2Signal input end connect, be used to control light conflict solution and crosspoint 1
2Carry out conflict solution, exchanges data and the routing addressing of data.Light conflict solution and crosspoint 1
2Output and optical multiplexer 1
3Input links to each other, optical multiplexer 1
3Output and edge router 1
5Signal receiving end connect, and the packet that receives is sent to the network access user end.
Node has N network access user end, by that analogy, can carry out multistage node expansion.Definition is the signal of setting out on a journey from the signal that node sends, and the signal that node receives is following road signal.
Node with the customer traffic that produces of N network access user be connected with crosspoint with node conflict solution through dense wave division multipurpose (DWDM) technology; Equally, node is continuous therewith through the DWDM technology for the data of the network access user end of N external node generation.
Network access user passes through control channel; Regularly with user data information; Be sent to connected node like User Status, user's request, user feedback or the like, this node is same regularly to be shared the access user data information, node status information and the adjacent node that are had.Adjacent node with these information stores in the middle of the memory cell of own control unit.
When the network access user end has data to produce; Router (ER) locates to be assembled into the light grouping on the edge of earlier; Have user profile in the data packet header, comprise origin identification symbol, address code, priority, type of service, user data variable-length, business datum granularity, check information or the like information.
Grouped data is carried out earlier inner exchanging and is handled in network access user end connected node; Control unit carries out addressing according to the packet header; For data, traffic assignments or seek corresponding destination node unit; If do not have the destination node unit of satisfying the demand, then grouped data be forwarded to adjacent node.
Contiguous each node carries out equilibrium according to s own situation; Seek the suitable adjacent node that satisfies condition according to the packet header; And grouped data is forwarded to corresponding adjacent node, the node that obtains user data is again according to data packet header information distribution suitable data receiving port.
The present invention has following advantage:
1, the present invention can realize happening suddenly in a large number the high-speed light data flow real-time, interactive and share.High-speed high capacity The data mesh network structure is controlled, is stored and handles, and can reduce the storage pressure of overall network, helps realizing multistage expansion, improves network efficiency.Adopt asynchronous switch mode and OPS technology can reduce time delay, satisfy network access user data burst sexual demand, improve link and node utilance and data transmission rate, do not need synchronised clock simultaneously.
2, the present invention adopts asynchronous switch mode, can reduce the data stand-by period, satisfies the sudden demand of user service data, avoids the needs to synchronised clock, increases business datum exchange flexibility.Particularly when carrying out multistage expansion, if adopt synchronous exchange, difficulty increase synchronously adopts asynchronous switch mode can avoid this problem between node.
4, the present invention adopts DWDM technology and OPS technology; The big characteristics of fiber capacity both can have been made full use of; Avoid electronic bottleneck, improved channel utilization, can avoid the technological deficiency of OCS and OBS again; Low and the bigger assembling time delay like link utilization, thus satisfy user's bursty data and real-time requirement.
Description of drawings
Fig. 1 is a kind of multi-wavelength mesh network self adaptation node framework based on the asynchronous optical packet switching.
Fig. 2 is the user data packets information format.
Fig. 3 is the control unit structure.
Fig. 4 is the network architecture that three grades of nodes are formed.
Embodiment
Multi-wavelength mesh network self adaptation node framework based on the asynchronous optical packet switching is as shown in Figure 1.
A kind of based on the light packet switching asynchronous multi-wavelength mesh network adaptive session dot system, comprise that N is inserted user side (U).
With reference to Fig. 1, node is by control unit 1
1, light conflict solution and crosspoint 1
2, optical multiplexer 1
3, beam splitter 1
4, edge router 1
5, fiber delay line 1
6, optical demultiplexer 1
7Form.Insert user's data through edge router 1
5Transmitting terminal and optical multiplexer 1
3Input connect, be used for multipath light signal adopted that dense wave division multipurpose (DWDM) technology is multiplexing advances optical fiber, optical multiplexer 1
3Output through optical fiber and beam splitter 1
4 Connect beam splitter 1
4Output and optical demultiplexer 1
7Input connect optical demultiplexer 1
7The output multiple signals that contain data packet header that will separate be delivered to control unit 1
1, beam splitter 1
4Another output with through fiber delay line 1
6With optical demultiplexer 1
7Input connect optical demultiplexer 1
7Output conflict with light solution and crosspoint 1
2Connect, the multichannel data packet signal that separates is delivered to light conflict solution and crosspoint 1
2 Beam splitter 1
4Be used for data-signal is separated with the data packet header control signal.Control unit 1
1Control signal output ends conflict with light solution and crosspoint 1
2Signal input end connect, be used to control light conflict solution and crosspoint 1
2Carry out conflict solution, exchanges data and the routing addressing of data.Light conflict solution and crosspoint 1
2Output and optical multiplexer 1
3Input links to each other, optical multiplexer 1
3Output and edge router 1
5Signal receiving end connect, and the packet that receives is sent to the network access user end.
With reference to Fig. 2, user data packets information is expressed as following form: form origin identification symbol, address code, priority, type of service, user data variable-length, boundary belt/data origin identification symbol, business datum granularity, check information.The label that form origin identification symbol begins as the new data section, the address code representative data the destination that will reach, priority has been represented the severity level of data; Type of service indicates data and belongs to the variety classes business in the network; The business datum granularity has been represented size, the thickness of data granularity, and the user data variable-length has been indicated size, the bag length of user data, and boundary belt/data origin identification symbol had both played the effect of separating header and data message; Represented the beginning of data message again; User data is the data that network access user provides/needs, and check information is protected overall data, detects data.
With reference to Fig. 3, the 1st node control unit 1
1, second node control unit 21
1, the 3rd node control unit 31
1... Or N node control unit adopts control unit to realize that this control unit is by optical-electrical converter B
1, a recognition unit B
2, core control algolithm unit B
3Form optical-electrical converter B
1Input as the signal input end of control unit, optical-electrical converter B
1Output and a recognition unit B
2Input connect a recognition unit B
2Output and core control algolithm unit B
3Input connect a recognition unit B
2Detailed user data packets header is sent to core control algolithm unit B
3, corresponding user data is dispatched core control algolithm unit B through algorithm process
3Output as the control signal output ends of control unit.
Embodiment 2
With reference to Fig. 4,
With three grades of node mesh networks is example, defines every grade of node and is in reciprocity status.Every grade of node has N network access user end, by that analogy, can carry out multistage node expansion.Definition is the signal of setting out on a journey from the signal that node sends, and the signal that node receives is following road signal.
Node with the customer traffic that produces of N network access user be connected with crosspoint with node conflict solution through dense wave division multipurpose (DWDM) technology; Equally, node is continuous therewith through the DWDM technology for the data of the network access user end of N external node generation.
Network access user passes through control channel; Regularly with user data information; Be sent to connected node like User Status, user's request, user feedback or the like, this node is same regularly to be shared the access user data information, node status information and the adjacent node that are had.Adjacent node with these information stores in the middle of the memory cell of own control unit.
When the network access user end has data to produce; Router (ER) locates to be assembled into the light grouping on the edge of earlier; Have user profile in the data packet header, comprise origin identification symbol, address code, priority, type of service, business datum granularity, user data variable-length, boundary belt/data origin identification symbol, user data, check information or the like information.
Grouped data is carried out earlier inner exchanging and is handled in network access user end connected node; Control unit carries out addressing according to the packet header; For data, traffic assignments or seek corresponding destination node unit; If do not have the destination node unit of satisfying the demand, then grouped data be forwarded to adjacent node.
Contiguous each node carries out equilibrium according to s own situation; Seek the suitable adjacent node that satisfies condition according to the packet header; And grouped data is forwarded to corresponding adjacent node, the node that obtains user data is again according to data packet header information distribution suitable data receiving port.
N level node is identical with other grade node structure, by control unit n1
1, light conflict solution and crosspoint n1
2, optical multiplexer n1
3, beam splitter n1
4, edge router n1
5, fiber delay line n1
6, optical demultiplexer n1
7Form.Insert user's data through edge router n1
5Transmitting terminal and optical multiplexer n1
3Input connect, be used for multipath light signal adopted that dense wave division multipurpose (DWDM) technology is multiplexing advances optical fiber, optical multiplexer n1
3Output through optical fiber and beam splitter n1
4Connect beam splitter n1
4Output and optical demultiplexer n1
7Input connect optical demultiplexer n1
7The output multiple signals that contain data packet header that will separate be delivered to control unit n1
1, beam splitter n1
4Another output with through fiber delay line n1
6With optical demultiplexer n1
7Input connect optical demultiplexer n1
7Output conflict with light solution and crosspoint n1
2Connect, the multichannel data packet signal that separates is delivered to light conflict solution and crosspoint n1
2Beam splitter n1
4Be used for data-signal is separated with the data packet header control signal.Control unit n1
1Control signal output ends conflict with light solution and crosspoint n1
2Signal input end connect, be used to control light conflict solution and crosspoint n1
2Carry out conflict solution, exchanges data and the routing addressing of data.Light conflict solution and crosspoint n1
2Output and optical multiplexer n1
3Input links to each other, optical multiplexer n1
3Output and edge router n1
5Signal receiving end connect, and the packet that receives is sent to the network access user end.
Claims (3)
1. the asynchronous multi-wavelength mesh network adaptive session dot system based on the light packet switching is characterized in that comprising that N is inserted user side (U), and N is the natural number more than or equal to 2, inserts the sum of user side in the expression network.Wherein, node is by control unit 1
1, light conflict solution and crosspoint 1
2, optical multiplexer 1
3, beam splitter 1
4, edge router 1
5, fiber delay line 1
6, optical demultiplexer 1
7Form; Insert user's data through edge router 1
5Transmitting terminal and optical multiplexer 1
3Input connect, be used for multipath light signal adopted that dense wave division multipurpose (DWDM) technology is multiplexing advances optical fiber, optical multiplexer 1
3Output through optical fiber and beam splitter 1
4Connect beam splitter 1
4Output and optical demultiplexer 1
7Input connect optical demultiplexer 1
7The output multiple signals that contain data packet header that will separate be delivered to control unit 1
1, beam splitter 1
4Another output with through fiber delay line 1
6With optical demultiplexer 1
7Input connect optical demultiplexer 1
7Output conflict with light solution and crosspoint 1
2Connect, the multichannel data packet signal that separates is delivered to light conflict solution and crosspoint 1
2Beam splitter 1
4Be used for data-signal is separated with the data packet header control signal; Control unit 1
1Control signal output ends conflict with light solution and crosspoint 1
2Signal input end connect, be used to control light conflict solution and crosspoint 1
2Carry out conflict solution, exchanges data and the routing addressing of data; Light conflict solution and crosspoint 1
2Output and optical multiplexer 1
3Input links to each other, optical multiplexer 1
3Output and edge router 1
5Signal receiving end connect, and the packet that receives is sent to the network access user end.
2. the asynchronous multi-wavelength mesh network adaptive session dot system based on the light packet switching according to claim 1; It is characterized in that user data packets information, be expressed as following form: form origin identification symbol, address code, priority, type of service, user data variable-length, boundary belt/data origin identification symbol, business datum granularity, check information; The label that form origin identification symbol begins as the new data section, the address code representative data the destination that will reach, priority has been represented the severity level of data; Type of service indicates data and belongs to the variety classes business in the network; The business datum granularity has been represented size, the thickness of data granularity, and the user data variable-length has been indicated size, the bag length of user data, and boundary belt/data origin identification symbol had both played the effect of separating header and data message; Represented the beginning of data message again; User data is the data that network access user provides/needs, and check information is protected overall data, detects data.
3. the asynchronous multi-wavelength mesh network adaptive session dot system based on the light packet switching according to claim 1 is characterized in that node control unit 1
1The employing control unit realizes that this control unit is by optical-electrical converter B
1, a recognition unit B
2, core control algolithm unit B
3Form optical-electrical converter B
1Input as the signal input end of control unit, optical-electrical converter B
1Output and a recognition unit B
2Input connect a recognition unit B
2Output and core control algolithm unit B
3Input connect a recognition unit B
2Detailed user data packets header is sent to core control algolithm unit B
3, corresponding user data is dispatched core control algolithm unit B through algorithm process
3Output as the control signal output ends of control unit.
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| CN107742924A (en) * | 2017-11-08 | 2018-02-27 | 江苏第二师范学院 | Intelligent grid accesses distributed self-adaption node and system |
| CN112019440A (en) * | 2020-07-27 | 2020-12-01 | 中国人民解放军海军工程大学 | CAN bus multicast method based on identifier multiplexing |
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Application publication date: 20120425 Assignee: Changzhou Taiping Communication Science & Technology Co., Ltd. Assignor: Southeast University Contract record no.: 2014320000445 Denomination of invention: Asynchronous multi-wavelength mesh network adaptive node system based on optical packet switching Granted publication date: 20131225 License type: Exclusive License Record date: 20140522 |
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