CN1825788A - Light path automatic switching system - Google Patents
Light path automatic switching system Download PDFInfo
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- CN1825788A CN1825788A CN 200610025047 CN200610025047A CN1825788A CN 1825788 A CN1825788 A CN 1825788A CN 200610025047 CN200610025047 CN 200610025047 CN 200610025047 A CN200610025047 A CN 200610025047A CN 1825788 A CN1825788 A CN 1825788A
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Abstract
This invention relates to an optical path automatic switching system including a chassis, a power supply, a network disk and at least a service disk, in which, said supply provides power supply to the network disk and the service disk, and they are plugged in the chassis, the service and the network disks are connected by a serial bus, said service disk is composed of a light T-R module, a photoelectric switch chip, a digital signal processor, a programmable digital logic device, a single-chip processor, a first optical switch and a second optical switch, which can be used in automatic switch between a master fiber optical path and a backup fiber optical path and master and backup devices in point to point, loop network and mesh fiber communication and provides non-blocking communication to users and networks.
Description
Technical field
The present invention relates to fiber optic communication field, particularly a kind of light path automatic switching system of in point-to-point optical fiber communication, doing active and standby light path switching.
Background technology
Along with development of Communication Technique, as the media of signal transmission, a large amount of optical fiber have been laid operation in arterial grid and metropolitan area network.China's Telecommunication's cable network that gigameter is huge, the annual generation surpasses 2000 times optical cable blocking-up, causes the huge direct communication loss that surpasses 1,000,000,000 yuan and all trades and professions, all departments of Party, government and army of national economy are brought immeasurable indirect heavy losses.When optical fiber fractures or line loss when increasing, the data interruption fully of will losing even communicate by letter.The introducing of fiber optic protection notion is exactly in order to solve following problem: when the working optical fibre loss corrupts to a certain degree, circuit will automatically switch in Millisecond on the standby optic fibre light path, finish the protection of fibre circuit.High-capacity optical cable communication network with automatic monitoring and automatic protective capability is the necessary of the information age development of the national economy; therefore; in the fiber-optic monitoring and the protection system that develop step by step each fiber optic transmission system equipment, development all has very significant meaning to other communication network monitoring resist technology.
Aspect fiber optic protection, traditional solution is the optical fiber self-healing ring scheme of SDH (SDH (Synchronous Digital Hierarchy)), and Self-healing Rings can provide the equipment of redundancy bandwidth and redundant network, the feasible loop network that can recover automatically because of the affected business of network failure on the net.The SDH biggest advantage is network and self-healing property, its linear applications can not be given full play of its these characteristics, and therefore SDH equipment is formed ring network in most cases, and all nodes that will be referred to communicate by letter are together in series, and join end to end, without any open node.
For the large-scale user of enterprises and institutions, because bandwidth demand is big, can consider directly to use that (STM-1 is basic rate 155520kbit/s for the synchronous transfer mode STM-N of SDH (Synchronous Digital Hierarchy) (SDH), N represents multiple, commonly used has 1,4,16,64) loop configuration is interconnected with it, yet, may be reluctant to be subjected to the restriction of annular bandwidth to some very high large-scale enterprises and institutions of bandwidth requirement, they prefer point-to-point connected mode.In addition, with on the equipment in the SDH (Synchronous Digital Hierarchy) (SDH)/following multiplexer (ADM) is placed directly in the problem that also there is an information security in the user location.It is to protect switching at operation layer that SDH (Synchronous Digital Hierarchy) (SDH) self-healed protection is switched, so its protection handover mechanism more complicated.For the SDH transmission system that has more point-to-point or chain at present, usually adopt increase line interface base to form Self-healing Rings and dispose the protection that multiplex section protection function (or path protection function) realizes fibre circuit simultaneously, but also there is following problem in this scheme: protection is longer switching time, and general protection switch time is about 50ms; Realize and follow-up maintenance cost height, difficulty big; The fibre circuit protection of the SDH transmission equipment of identical producer same-interface speed can only be used, same producer can be limited by; Equipment cost height, circuit need two fine or four fibres.
Summary of the invention
The technical problem to be solved in the present invention is to overcome above-mentioned shortcoming of the prior art; provide a kind of at optical line by; the light path automatic switching system that optical transport layer is protected; automatically carry out main optical path and the switching of light path fully in the optical fiber communication of the point to point line transmission of this system in point-to-point or loop; for the user provides without hindrance open close letter, realize there are not blocking-up, highly reliable, safety, optical communication net that anti-disaster ability is strong.
Technical scheme of the present invention is:
A kind of light path automatic switching system, this system comprises cabinet, power supply, webmaster dish and at least one professional dish, described power supply provides power supply for webmaster dish and professional dish; Described power supply, webmaster dish and professional dish are inserted in the cabinet, professional dish adopts universal serial bus to be connected with the webmaster dish, described professional dish is by optical transceiver module, the opto-electronic conversion chip, digital signal processor, the programmable digital logic device, single-chip microcomputer, first optical switch and second optical switch are formed, respectively connect four road optical fiber on described first optical switch and second optical switch, wherein first via optical fiber connects optical transceiver module, the professional client of the second road optical fiber, Third Road optical fiber connects the main fiber light path, the four road optical fiber connects standby optic fibre light path, this optical transceiver module is connected with described opto-electronic conversion chip, described opto-electronic conversion chip links to each other with digital signal processor, this digital signal processor is divided into two-way, one the tunnel directly connects described single-chip microcomputer, another road connects described single-chip microcomputer through the programmable digital logic device, this single-chip microcomputer connects the webmaster dish by serial bus, and the output of this single-chip microcomputer connects the control end of first optical switch and second optical switch respectively, and this single-chip microcomputer also has one tunnel output to connect indicator light.
Be connected by the Ethernet interface mode between described opto-electronic conversion chip and the digital signal processor.
The Frame Protocol form of the RS485 bus connecting mode that described webmaster dish and each professional dish adopt adopts the asynchronous serial port form.
Be provided with the interface conversion chip between described single-chip microcomputer and the webmaster dish.
The job step of described professional dish is as follows:
1. described digital signal processor comes out the operating state demodulation of described light path from the information of optical transceiver module, and judge, if light path work is undesired, the information that soon need carry out the light path switching is sent to described single-chip microcomputer, and the order that this single-chip microcomputer switches light path is sent to described first optical switch and/or second optical switch is carried out the light path switching;
2. described single-chip microcomputer receives directly the needs that send from webmaster dish or network management center and carries out the order that light path is switched, and promptly transfers to described first optical switch and/or second optical switch and carries out light path and switch.
Each piece business board in this light path automatic switching system has unique authentication number, and the job step of described webmaster dish and professional dish is as follows:
1. professional dish self is finished initialization procedure, waits for the poll of webmaster dish;
2. webmaster plate wheel continuous query or searching service dish have response as the business dish, will self report the state information that whether has been connected with cabinet, and carry out for the 3. step; As do not have response and skipped to for the 5. step;
3. professional dish operate as normal, the order that response webmaster dish is sent comprises that status inquiry command and state change order;
4. the corresponding authentication record traffic of webmaster dish dish is on cabinet, and can with the information of webmaster dish proper communication;
5. the webmaster dish thinks that this business dish not to insert, and writes down it and be inertia;
6. between at regular intervals after, carried out for the 2. step.
Technique effect of the present invention:
After light path automatic switching system of the present invention is used for optical communication and fibre circuit, when the optical communication equipment of normal use, optical line when breaking down, can switch to normal standby light path or protection route intelligently, the communication transmission is recovered rapidly, unlikely break in service, effectively reduce the delivery maintenance load, improved service quality; And the present invention is applicable to that various communication transmission systems and the miscellaneous service that is carried comprise voice, data, image etc., can apply to variety of network environments, comprises point-to-point, ring-type, network such as netted.
Response speed of the present invention fast (switching time is generally less than 20ms), can recover professional and simple to operate fully, the route protection switched system is applied to physical layer, be exclusively used in the active and standby optical fiber circuit of using of transmission line, when circuit breaks down, optical fiber circuit automatically switches to route stand-by from primary route, save and manually search and change to the time that extension wire spends, reduced traffic lost;
Upgrade expanding from now on is convenient in the present invention, makes things convenient for network operation, and on application model, this system can use by unit, also can put on the shelf and use to the communication frame of standard.Simultaneously, optical fiber automatic switchover system of the present invention has adopted modularized design, has powerful expansion capacity, also adapts to the network architecture of more complicated, high resiliency expansion, helps the upgrade expanding of network, makes things convenient for the maintenance of network, reducings the construction costs;
The present invention helps solving some relaying room management strength weakness, can effectively save and manually search and switching time, automatic switchover system can be set automatic switchover software according to user's actual conditions, carrying out Long-distance Control switches, circuit is transferred to alternate routing automatically, effectively saving is manually searched and switching time, recovers communications rapidly.
The present invention is directed to big customer, the Very Important Person circuit of important transmission system or high network quality demand, it is unimpeded to guarantee network security, and is a kind of economy, simple and efficient method, does not need to adopt expensive SDH ring protection equipment.
Description of drawings
Fig. 1 is the overall appearance schematic diagram of light path automatic switching system of the present invention;
Fig. 2 is the annexation schematic diagram of each dish among the present invention;
Fig. 3 is the internal structure schematic block diagram of business board among the present invention;
Fig. 4 is the correspondence schematic diagram of two equipment rooms of the present invention;
Fig. 5 is the operating procedure flow chart that professional dish of the present invention inserts frame;
Fig. 6 is the operating procedure flow chart of professional dish operate as normal of the present invention;
Fig. 7 need not to inquire about or do not have the operating procedure flow chart of response for professional dish of the present invention;
Among the figure:
The 1-cabinet;
2-webmaster dish;
The professional dish of 3-; The 31-optical transceiver module; 32-opto-electronic conversion chip; The 321-Ethernet interface;
The 33-digital signal processor; 34-programmable digital logic device;
The 35-single-chip microcomputer; 36-first optical switch;
361-first via optical fiber; 362-the second road optical fiber; 363-Third Road optical fiber; 364-the four road optical fiber;
37-second optical switch;
371-first via optical fiber; 372-the second road optical fiber; 373-Third Road optical fiber; 374-the four road optical fiber;
The 351-RS232 serial bus;
38-interface conversion chip; The 381-RS485 bus interface; The 39-indicator light;
The 4-power supply.
Embodiment
Describe the present invention below in conjunction with accompanying drawing.
As the overall appearance schematic diagram of Fig. 1 for a specific embodiment of light path automatic switching system of the present invention, as seen from the figure, light path automatic switching system of the present invention comprises cabinet 1, webmaster dish 2, professional dish 3 and power supply 4 four parts composition, webmaster dish 2, eight professional dishes 3 and power supply 4 insert in the cabinets 1, adopt RS485 serial communication mode to communicate (as shown in Figure 2) between webmaster dish 2 and the professional dish 3, the Frame Protocol form of communication adopts the asynchronous serial port form.
Fig. 3 is the internal structure schematic block diagram of professional dish of the present invention, described business dish 3 is by optical transceiver module 31, opto-electronic conversion chip 32, digital signal processor 33, programmable digital logic device 34, single-chip microcomputer 35, interface conversion chip 38, indicator light 39, first optical switch 36 and second optical switch 37 are formed, described first optical switch 36 is finished the handoff functionality that information sends light path, second optical switch 37 is finished the handoff functionality of message pick-up light path, on described first optical switch 36 and second optical switch 37, respectively connect four road optical fiber, the first via optical fiber 361 that first optical switch 36 is connected with second optical switch 37,371 insert optical transceiver module 1, the second road optical fiber 362,372 meet professional client, Third Road optical fiber 363,373 connect optic fibre light path, the four road optical fiber 364,374 connect standby optic fibre light path, the Third Road optical fiber 363 of first optical switch 36 links to each other with the four road optical fiber 374 with the Third Road optical fiber 373 of second optical switch 37 of opposite end with the four road optical fiber 364, the Third Road optical fiber 373 of second optical switch 37 links to each other with the four road optical fiber 364 with the Third Road optical fiber 363 of first optical switch 36 of opposite end with the four road optical fiber 374, as shown in Figure 4; Optical transceiver module 31 is connected with described opto-electronic conversion chip 32, described opto-electronic conversion chip 32 links to each other with digital signal processor 33, and adopt the interface mode of Ethernet to link to each other, this digital signal processor 33 is divided into two-way, one the tunnel directly connects described single-chip microcomputer 35, another road connects described single-chip microcomputer 35 through programmable digital logic device 34, this single-chip microcomputer 35 connects webmaster dish 32 with the RS232 interface conversion for the RS485 universal serial bus through interface conversion chip 38 by RS232 serial bus 351, the output of this single-chip microcomputer 35 also connects first optical switch 36 and second optical switch 37, control the switching of first optical switch 36 and second optical switch 37, single-chip microcomputer 35 also has one tunnel output to connect indicator light 39.
Opto-electronic conversion chip 32 is the chip of IP113 for model, and this opto-electronic conversion chip 32 is responsible for needing information transmitted to send into opto-electronic conversion chip 32 by the Ethernet electrical interface digital signal processor 33, sends into optical transceiver module 31 after the processing, converts light signal to.
Digital signal processor 33 is the digital signal processor (DSP) of TMS320F206 for model, be responsible for finishing and utilize opto-electronic conversion chip 32 to be modulated in the light path by Ethernet electrical interface 321 status data to transmit to the opposite end, and the status data demodulation of opposite end in the light path come out, the decision local terminal the optical switch state that should be in.
Programmable digital logic device 34 is the programmable digital logic device (CPLD) of XC9572 for model, IO data input/output port as the digital signal processor of expanding 33, finishing the work of information exchange between digital signal processor 33 and the single-chip microcomputer 35, is the bridge between digital signal processor 33 and the single-chip microcomputer 35.
The model of single-chip microcomputer 35 is 89C51, it is finished server upper strata webmaster and the reception of data is set (data enter by the RS485 bus, being converted to the RS232 interface receives) and during webmaster dish 2 polls information report (data are exported by RS232, are converted to RS485 and send into the webmaster dish); According to the order of serial ports reception or digital signal processor 33, decision needs the optical switch state of setting, orders first optical switch 36 and second optical switch 37 to finish the light path change action.Also finishing received optical power calculates, shows and the demonstration of indicator light 39 on the server network management interface is controlled.
First optical switch 36 and second optical switch 37 are responsible for receiving the switching command that single-chip microcomputer 38 is assigned, the switching between main optical path, standby light path 351.
3.3V and 5V power supply direct current that power supply 4 is responsible for backboard is provided carry out processing such as filtering, provide required power supply to chip.
Described webmaster dish 2 adopts industrial control board (model is WAFER-5820) to realize the network management function (the suitable microcomputer of this industrial control board) that needs, WINXP operating system is installed on the industrial control board, webmaster dish 2 in the present invention is finished the data acquisition to all the professional dishes 3 in the cabinet 1, and report long-range network management center, and network management center assigned to the instruction of business dish 3 send to each professional dish 3 by network interface.In addition, can webmaster dish 2 pass through COM? mouth carries out this locality configuration to the present invention.Webmaster dish 2 also is the central operator of supervisory control system, finishes monitoring and control to all professional dishes 3, collects professional dish 3 operating states, warning information, configuring condition, the professional dish of read-write 3 working attributes; Mutual with the supervision channel, finish proxy task in the management system simultaneously.
The job step of professional dish 3 is as follows:
1. described digital signal processor 33 comes out the normal or abnormal state of affairs data demodulates of opposite end in the light path;
2. described digital signal processor 33 judges that according to the normal or abnormal state of affairs content of the opposite end that demodulates current light path is normally or undesired, and whether the decision local terminal will carry out light path switches;
3. described digital signal processor 33 is sent to single-chip microcomputer 35 to the order that whether needs to switch;
The whether handover information of 4. described single-chip microcomputer 35 receiving digital signals processors 33 and webmaster dish 2 transmission;
The order whether 5. described single-chip microcomputer 35 transmissions need to switch is to described first optical switch 36 and second optical switch 37;
6. described digital signal processor 33 by single-chip microcomputer 35 whether switching of receiving that webmaster dishes 2 transmit information;
7. described digital signal processor 33 send information to the opposite end by opto-electronic conversion chip 32 and optical transceiver module 31 successively receiving the information of coming from single-chip microcomputer 35.
As Fig. 5 to the workflow that Figure 7 shows that light path automatic switching system:
1. professional dish 3 inserts the work behind the cabinet 1, as shown in Figure 5:
When one be for ID number that professional dish 3 self was finished initialization procedure, waits for the poll of webmaster dish 2 then after the business dish 3 of n inserted cabinets 1, c1 in the step webmaster dish 2 be polled to this professional dish 3, professional dish 3 reports its present state information in f1.
2. business dish 3 normal operation are as shown in Figure 6:
During business dish 3 operate as normal, the webmaster that response webmaster dish 2 is sent in step s1 is provided with order, comprises that status inquiry command and state change order.
3. need not to inquire about business dish 3 or the professional dish 3 that ID is n and do not have response
When being polled to ID is that the business of n is when coiling 3, under the situation that this business dish 3 does not have to insert or do not have response in time, webmaster dish 2 will think that this ID number business dish 3 does not insert, and in tabulation, it is changed to inertia (as inquiring about ID=1,2 two professional dishes 3 among Fig. 7 in the c1 step, and two professional dishes 3 do not have the situations of reflection); Need the business dish number of poll and the polling interval (being set at 50ms) between professional dish 3 and the professional dish 3 to be provided with at most by webmaster dish 2.
Claims (6)
1. a light path automatic switching system is characterized in that this system comprises cabinet (1), power supply (4), webmaster dish (2) and at least one professional dish (3), and described power supply (4) is that webmaster dish (2) and professional dish (3) provide power supply; Described power supply (4), webmaster dish (2) and professional dish (3) are inserted in the cabinet (1), professional dish (3) adopts universal serial bus to be connected with webmaster dish (2), described professional dish (3) is by optical transceiver module (31), opto-electronic conversion chip (32), digital signal processor (33), programmable digital logic device (34), single-chip microcomputer (35), first optical switch (36) and second optical switch (37) are formed, respectively connect four road optical fiber (30) on described first optical switch (36) and second optical switch (37), wherein first via optical fiber (361) (371) connects optical transceiver module (1), the professional client of the second road optical fiber (362) (372), Third Road optical fiber (363) (373) connects the main fiber light path, the four road optical fiber (364) (374) connects standby optic fibre light path, this optical transceiver module (31) is connected with described opto-electronic conversion chip (32), described opto-electronic conversion chip (32) links to each other with digital signal processor (33), this digital signal processor (33) is divided into two-way, one the tunnel directly connects described single-chip microcomputer (35), another road connects described single-chip microcomputer (35) through programmable digital logic device (34), this single-chip microcomputer (35) connects webmaster dish (2) by serial bus, the output of this single-chip microcomputer (35) connects the control end of first optical switch (36) and second optical switch (37) respectively, and this single-chip microcomputer (35) also has one tunnel output to connect indicator light (39).
2. light path automatic switching system according to claim 1 is characterized in that being connected by the Ethernet interface mode between described opto-electronic conversion chip (32) and the digital signal processor (33).
3. light path automatic switching system according to claim 1 is characterized in that the Frame Protocol form of the RS485 bus connecting mode that described webmaster dish (2) and each professional dish (3) adopt adopts the asynchronous serial port form.
4. light path automatic switching system according to claim 1 is characterized in that being provided with interface conversion chip (38) between described single-chip microcomputer (35) and the webmaster dish (2).
5. light path automatic switching system according to claim 1 is characterized in that the job step of described professional dish (3) is as follows:
1. described digital signal processor (33) comes out the operating state demodulation of described light path from the information of optical transceiver module (31), and judge, if light path work is undesired, the information that soon need carry out the light path switching is sent to described single-chip microcomputer (35), and the order that this single-chip microcomputer (35) switches light path is sent to described first optical switch (36) and/or second optical switch (37) is carried out the light path switching;
2. described single-chip microcomputer (35) receives directly the needs that send from webmaster dish (2) or network management center and carries out the order that light path is switched, and promptly transfers to described first optical switch (36) and/or second optical switch (37) and carries out light path and switch.
6. light path automatic switching system according to claim 1 is characterized in that each piece business board in this light path automatic switching system has unique authentication number, and the job step of described webmaster dish (2) and professional dish (3) is as follows:
1. professional dish (3) self is finished initialization procedure, waits for the poll of webmaster dish (2);
2. webmaster dish (2) wheel continuous query or searching service dish (3) have response as business dish (3), will self report the state information that is connected with cabinet (1), and carry out the and 3. go on foot; As do not have response and skipped to for the 5. step;
3. professional dish (3) operate as normal, the order that response webmaster dish (2) is sent comprises that status inquiry command and state change order;
4. webmaster dish (2) corresponding authentication record traffic dish (3) is on cabinet (1), and can with the information of webmaster dish (2) proper communication;
5. webmaster dish (2) thinks that this business dish (3) not to insert, and writes down it and be inertia;
6. between at regular intervals after, carried out for the 2. step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610025047 CN1825788A (en) | 2006-03-24 | 2006-03-24 | Light path automatic switching system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610025047 CN1825788A (en) | 2006-03-24 | 2006-03-24 | Light path automatic switching system |
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| Publication Number | Publication Date |
|---|---|
| CN1825788A true CN1825788A (en) | 2006-08-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610025047 Pending CN1825788A (en) | 2006-03-24 | 2006-03-24 | Light path automatic switching system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016086700A1 (en) * | 2014-12-05 | 2016-06-09 | 中兴通讯股份有限公司 | Rack and communication method |
-
2006
- 2006-03-24 CN CN 200610025047 patent/CN1825788A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016086700A1 (en) * | 2014-12-05 | 2016-06-09 | 中兴通讯股份有限公司 | Rack and communication method |
| CN105721956A (en) * | 2014-12-05 | 2016-06-29 | 中兴通讯股份有限公司 | Frame and communication method |
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Open date: 20060830 |