CN100391140C - Method and apparatus for expanding wavelength-division multiplexing optical networks - Google Patents
Method and apparatus for expanding wavelength-division multiplexing optical networks Download PDFInfo
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Abstract
The present invention relates to an expansion method and expansion equipment for a wave division multiplex optical network. The expansion method comprises: A. expansion equipment is correspondingly added to sites at both ends of a wave division network segment needing to be expanded; B. after a new adding optical wavelength signal outputted by the expansion equipment and the original wavelength signal are combined, the combined signal is transmitted in an optical fiber; C. the new adding optical wavelength signal which is transmitted by a wave division network and is separated is connected into the expansion equipment; D. an expansion network monitoring information channel for transmitting monitoring information is established between the expansion equipment of all network sites. The expansion network monitoring information channel is independent of the original network monitoring information channel. The expansion equipment comprises an optical sender for generating the new adding optical wavelength signal, an optical receiver for receiving the new adding optical wavelength signal, and a network monitoring and communication unit for processing network monitoring information. The expansion method and the expansion equipment solve the problems of interface compatibility and network monitoring information communication which are faced when the wave division multiplex equipment of different manufacturers are across expanded, and the expansion of the wave division equipment of different manufacturers is realized.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of expansion method and equipment in the capacity expansion of wavelength division multiplexed optical network.
Background technology
Telecommunication optical fiber has huge message transmission capacity, an optical fiber the inside can simultaneously and be transmitted a plurality of wavelength optical signals independently of one another, each light signal can carry the different information contents as an Independent Carrier Wave, and can increase and decrease transmission capacity by the increase and decrease number of wavelengths easily.This technology that transmits a plurality of different wave length light signals simultaneously an optical fiber the inside is exactly a wavelength-division multiplex technique.Wavelength division multiplexing is the frequency division multiplexing in light territory, because its jumbo transmittability and level and smooth dilatation characteristic are adopted in the modern optical communications networks network in a large number.
The equipment of a plurality of employing wavelength-division multiplex techniques connects mutually, and has just constituted the wavelength-division communication network after the function of the network monitoring information of adding intercommunication necessity.Typical wavelength-division network is seen Fig. 1, and TX is an optical sender, and the service signal (as the SDH signal) that is used for that the IN mouth is brought converts the light signal of satisfactory definite wavelength to.OM is a wavelength division multiplexer, is used for the wavelength optical signals that all TX send merged sending into an optical fiber and transmitting.OA is an image intensifer, is used for the compensated fiber Line Attenuation, prolongs signal transmission distance.OD is a Wave decomposing multiplexer, is used for wavelength optical signals in the optical fiber is separated.RX is an optical receiver, and the light signal that is used for a certain wavelength that OD is separated receives and converts to the signal that meets business demand and sends from the OUT mouth.For realizing two-way communication, the two ends of a certain network segment can be provided with optical receiver and optical sender respectively simultaneously.
In addition, in order to realize supervision, the control of each cell operation states such as TX/RX, OM/OD, OA, the monitor message transmission channels that except business transferring information, also is necessary between these unit.
Because wavelength-division network generally can provide bigger transmission capacity, only need use a wherein part usually at the networking initial stage, and dilatation use after another part transmission capacity given over to.And for the consideration that reduces up-front investment; usually can be not at present during new networking need not, the parts just used of dilatation in future all add; so also needing usually during dilatation increases some software and hardware parts, as produces the parts of new wavelength light signal, realizes dilatation.
The dilatation of wavelength-division network mainly is exactly to realize dilatation by the light wave long number that increases system bearing.At present at the interface of service signal and wave-division device, be to have definite standard such as ITU-T G.957 to wait on two interfaces of IN, OUT, can realize the intercommunication of devices from different manufacturers in this aspect.Leading indicator different manufacturers such as the wavelength of the transmission light signal of optical sender TX and power are very approaching, wherein ITU-T G.692 standard indexs such as wavelength have been carried out standard.But for the network monitoring information of how transmitting between each unit such as TX/RX, OM/OD, OA, different wave-division device producers adopts different internal interfaces, and difference is very big.
In present prior art, generally use wavelength to carry out the transmission of monitor message between the different stations as the light monitor message passage (OSC) of 1510nm or 1625nm.Because network monitoring information interface difference, when non-original factory man equipment supplier carried out dilatation to network, monitor message cannot be by original equipment supplier's monitor message channel transfer.
Usually to increase the TX/RX unit at the network segment two ends during wavelength-division network dilatation, be used to increase the number of wavelengths of system bearing, need intercommunication network monitor message (as equipment working state, professional break-make etc.) between the TX that increases newly, the RX unit.By the scheme of prior art, the transmission of network monitoring information need depend on the monitor message passage of legacy network between the TX that dilatation increases newly, the RX unit.But the network monitoring information interface difference owing to devices from different manufacturers causes present wavelength dilatation can only adopt with the equipment of the identical producer of the former network equipment and realizes, otherwise meeting can't the delivery network monitor message because network monitoring information channel interface is different.The drawback of bringing thus is: the first, brought potential risks to Virtual network operator, in the time of can't providing the dilatation product again such as the equipment component merchant owing to reasons such as equipment stopping production or company's bankruptcies, operator can't carry out upgrade expanding on the existing equipment basis, so greatly reduce the network benefit; The second, the not general dilatation cost height that causes of equipment in the capacity expansion, owing to can only rely on original equipment supplier to realize dilatation, thus can not form effective competition, and the result of exclusive supply is likely and holds at high price, and can not realize the upgrading of the network capacity extension cheaply.
Summary of the invention
Technical problem to be solved by this invention is: expansion method and equipment in the capacity expansion that a kind of wavelength division multiplexed optical network is provided, solve the network monitoring information communication problem that is faced when intersecting dilatation between the different manufacturers WDM, realize the dilatation between the different manufacturers wave-division device.
The present invention solves the problems of the technologies described above the technical scheme that is adopted to be:
A kind of expansion method of wavelength division multiplexed optical network, wherein: said method comprising the steps of:
A, at the corresponding equipment in the capacity expansion that increases of the wavelength-division network section two ends website that is needing dilatation, described equipment in the capacity expansion comprises: the optical sender that is used to produce newly-increased optical wavelength signal, be used to receive the optical receiver of described newly-increased optical wavelength signal, be used to handle the network monitoring and the communication unit of network monitoring information;
After closing the road, the newly-increased optical wavelength signal that B, each dilatation website are exported the optical sender of described equipment in the capacity expansion respectively and original wavelength signals in optical fiber, transmit;
The described newly-increased optical wavelength signal that C, each dilatation website send distance station respectively, the process wavelength-division network is transferred to our station and be separated inserts the optical receiver of the described equipment in the capacity expansion of our station;
D, set up the dilatation network monitoring information channel be used for transmitting monitor message between the equipment in the capacity expansion of described each website, described dilatation network monitoring information channel is independent of legacy network monitor message passage.
Described expansion method, wherein: the described dilatation network monitoring of step D information channel is set up by described network monitoring and communication unit, described network monitoring and communication unit are connected with described optical sender, described optical receiver respectively, described network monitoring information and service signal are lumped together between the equipment in the capacity expansion of corresponding end transmit.
Described expansion method, wherein: described network monitoring information is passed through a kind of transmission in the following manner: be with outer embedded control channel mode; Perhaps band is embedded in formula control channel mode; Perhaps the emission light signal is transferred the top mode; Perhaps the emission light signal is carried out the mode of sub-carrier modulation.
Described expansion method, wherein: the described dilatation network monitoring of step D information channel is set up by described network monitoring and communication unit, described network monitoring and communication unit have the monitoring and controlling channels transmitting-receiving interface that at least one cover is used for the transceiver network monitor message, and described monitoring and controlling channels transmitting-receiving interface is connected to each other between the equipment in the capacity expansion, transmits described network monitoring information by described monitoring and controlling channels transmitting-receiving interface with the individual channel mode.
Described expansion method, wherein: a kind of transmission of described network monitoring information in the following manner: use the OSC monitoring and controlling channels of a wavelength to transmit separately; Perhaps transmit by data communication network; Perhaps transmit by the dialing network; Perhaps transmit by RS232 or RS422 standard interface serial-port; Perhaps transmit by the DDN special line; Perhaps transmit by radio communication network; Perhaps connect and transmit by infrared ray.
Described expansion method, wherein: the output of the described optical sender of step B is received the corresponding input of original OM of wavelength-division network or Optical Add/Drop Multiplexer, and the input of the described optical receiver of step C is received the corresponding output of original OM of wavelength-division network or Optical Add/Drop Multiplexer.
A kind of equipment in the capacity expansion of wavelength division multiplexed optical network, wherein: comprise at least one optical sender, be used to produce and send the optical wavelength signal that meets the wavelength-division network requirement; At least one optical receiver is used to receive the optical wavelength signal through the wavelength-division network transmission; Also comprise at least one network monitoring and communication unit, be used for handling and the delivery network monitor message, described network monitoring and communication unit are connected with optical receiver with described optical sender respectively, and be connected with the opposite end equipment in the capacity expansion and set up dilatation network monitoring information channel, described dilatation network monitoring information channel is independent of legacy network monitor message passage.
Described equipment in the capacity expansion, wherein: described optical sender comprises: an optical-electrical converter is used to receive service signal; One processing unit that transmits is used for the monitor message that described service signal and described network monitoring and communication unit transmit merged and is encoded into composite signal; One Optical Transmit Unit is sent into the wavelength-division network transmission after being used for converting described composite signal the light signal of specific wavelength to;
Described optical receiver comprises: a light receiving unit is used to receive the light signal that transmits and be separated through wavelength-division network; One received signal processing unit is used for isolating described service signal and described monitor message and described monitor message being sent to described network monitoring and communication unit from described light signal; One electrical to optical converter, the service signal that is used for separating converts light signal to and sends;
Described network monitoring and communication unit with described transmit between the processing unit and with described received signal processing unit between link to each other.
Described equipment in the capacity expansion, wherein: described optical sender comprises: an optical-electrical converter is used to receive service signal; One processing unit that transmits is used to monitor the received signal quality state, and with network monitoring and communication unit switching network monitor message; One Optical Transmit Unit is sent into the wavelength-division network transmission after being used for described conversion of signals become the light signal of specific wavelength;
Described optical receiver comprises: a light receiving unit is used to receive the light signal that transmits and be separated through wavelength-division network; One received signal processing unit is used for monitors transmitted signal quality state, and with network monitoring and communication unit switching network monitor message; One electrical to optical converter is used for converting the service signal through the wavelength-division network transmission to light signal and sending;
Described network monitoring and communication unit with described transmit between the processing unit and with described received signal processing unit between link to each other, and described network monitoring and communication unit have the special-purpose monitoring and controlling channels transmitting-receiving interface of at least one cover, are used for the transceiver network monitor message.
Described equipment in the capacity expansion, wherein: described monitoring and controlling channels transmitting-receiving interface comprises: the optical interface of specific wavelength; Perhaps infrared communication interface; Perhaps radio communication interface; Perhaps DDN interface; Perhaps RS232 serial line interface; Perhaps modem interface; Or TCP/IP interface.
Described equipment in the capacity expansion, wherein: described light receiving unit can monitor and report the mass parameter of received signal, have at least a unit to adjust self running parameter automatically in described Optical Transmit Unit and the light receiving unit, to improve signal transmission quality according to the mass parameter of received signal.
Described equipment in the capacity expansion, wherein: described mass parameter comprises: the power of received signal, the error rate or signal to noise ratio.
Beneficial effect of the present invention is: because the present invention has adopted described expansion method and equipment in the capacity expansion in wavelength division multiplexed optical network, the network monitoring channel of having set up independent completion between each equipment in the capacity expansion that increases for the wavelength dilatation transmits network monitoring information, and and do not had getting in touch on the network monitoring information channel between the equipment in the capacity expansion, therefore, solved the network monitoring information communication problem that is faced when intersecting dilatation between the different manufacturers WDM, realize the dilatation between the different manufacturers wave-division device, avoided present wavelength-division dilatation to depend on former wavelength-division manufacturer and the expensive problem of bringing and the risk of supplying.
Description of drawings
Fig. 1 is typical wavelength-division network schematic diagram
Fig. 2 is a wavelength-division network equipment in the capacity expansion cut-away view
Fig. 3 is an OTM/REG node wave length dilatation connected mode
Fig. 4 is an OADM node wave length dilatation connected mode one
Fig. 5 is an OADM node wave length dilatation connected mode two
Fig. 6 is scheme one a wavelength-division network wavelength dilatation schematic diagram
Fig. 7 is scheme two wavelength-division network equipment in the capacity expansion cut-away views
Fig. 8 is scheme two wavelength-division network wavelength dilatation schematic diagrames
Embodiment
With embodiment the present invention is described in further detail with reference to the accompanying drawings below:
In existing wavelength-division network dilatation scheme, because the transitive dependency of the network monitoring information of newly-increased equipment in the capacity expansion is in legacy network monitor message passage, and different manufacturers wave-division device internal network monitor message channel interface difference, when network being carried out dilatation with non-original factory man equipment, the monitor message of newly-increased equipment in the capacity expansion cannot be by original monitor message channel transfer, therefore the different manufacturers wave-division device can not intercommunication, and equipment in the capacity expansion can only adopt the equipment of former producer.Main points of the present invention are to set up an independently dilatation network monitoring information channel between the newly-increased equipment in the capacity expansion of network, make between newly-increased each unit of equipment in the capacity expansion of our station and the newly-increased equipment in the capacity expansion of each dilatation website between can the intercommunication network monitor message, and this dilatation monitor message passage does not rely on by the original network monitoring information channel of equipment in the capacity expansion, can not intersect the problem of dilatation between the different manufacturers WDM thereby solve.For this reason, adopted following dilatation scheme:
Equipment in the capacity expansion of the present invention is seen shown in Figure 2, this equipment in the capacity expansion comprises: by the optical sender that optical-electrical converter 31, transmit processing unit 33 and Optical Transmit Unit 35 are formed, be used to produce and send the optical wavelength signal of a certain wavelength that meets the wavelength-division network requirement; By the optical receiver that electrical to optical converter 32, received signal processing unit 34, light receiving unit 36 are formed, be used to receive the optical wavelength signal of the corresponding wavelength that transmits through wavelength-division network; Must notice that according to the needs of dilatation, when for example needing the channel of a plurality of wavelength of dilatation, described optical receiver in the described equipment in the capacity expansion of the present invention and described optical sender can be a plurality of; Also comprise a network monitoring and communication unit 37, described network monitoring and communication unit 37 are connected with received signal processing unit 34 with the processing unit 33 that transmits respectively, are used to handle network monitoring information, and the network monitoring channel of described equipment in the capacity expansion is provided.
Expansion method meanwhile of the present invention is: A, increase wavelength at needs and carry out that the wavelength-division network section two ends website of dilatation is corresponding to increase above-mentioned equipment in the capacity expansion; B, two ends website transmit in optical fiber after respectively the newly-increased optical wavelength signal of the optical sender of described equipment in the capacity expansion output being inserted on the wavelength division multiplexer of legacy network and closing the road with original wavelength signals; In the optical receiver of the described equipment in the capacity expansion of the described newly-increased optical wavelength signal access our station that C, two ends website send distance station respectively, the process wavelength-division network is transferred to our station and be separated; D, set up the dilatation network monitoring information channel be used for transmitting monitor message between the equipment in the capacity expansion of described each website, described dilatation network monitoring information channel is independent of legacy network monitor message passage.The wavelength-division network section of two or more dilatations can be overlapping, overlap or head and the tail connect.As Fig. 6 and shown in Figure 8, because transmission is two-way, therefore, the described equipment in the capacity expansion of the other end equally also increases the reverse transfer of optical wavelength signal and dilatation network monitoring information channel newly by above-mentioned steps.
In the dilatation network monitoring information channel of transmitting monitor message between each unit of described equipment in the capacity expansion and between the equipment in the capacity expansion of described each website is that network monitoring and communication unit with each equipment in the capacity expansion is that core is set up.As shown in Figure 2, described network monitoring and communication unit 37 can be controlled each cell operation state of our station equipment in the capacity expansion and collect each cell operation state information, can give signal processing unit 33 with the network monitoring information that comprises order that the last layer network management system issues and our station information sends, also the network monitoring message pick-up that comprises distance station operating state and command response result that signal processing unit 34 decodings can be come out gets off, carry out the our station processing or be given to the last layer network management system according to the content of information again, set up thus between each dilatation node, the NMS monitor message transmission channels between each dilatation node of unifying; And this passage and do not had dependence between the network monitoring information channel of equipment in the capacity expansion.
After adopting above-mentioned dilatation scheme, service signal waiting for transmission is inserted the optical sender of described equipment in the capacity expansion, any WDM of this service signal in transmission course, its transmitted can be not separated and be concerned about, service signal is taken down by the optical receiver of distance station equipment in the capacity expansion through transmission and exports to business device, this shows, between each equipment in the capacity expansion that increases for the wavelength dilatation except can the normal transmission service signal, the dilatation network monitoring information channel that also has independent completion, this dilatation network monitoring information channel is to be that service signal is in the same place with described dilatation network monitoring information package with described newly-increased optical wavelength signal to what want dilatation in described equipment in the capacity expansion, then via the existing equipment of optical fiber wavelength division network and the equipment in the capacity expansion of opposite end between transmission and forming, so can realize intercommunication between the different manufacturers WDM, the intersection dilatation.
As Fig. 3, Fig. 4, the connected mode figure that is equipment in the capacity expansion of the present invention in various typical wavelength-division network nodes (OTM (Optical Terminal Multiplexer Optical Terminal Multiplexer)/REG (Regenerator regenerator), OADM (Optical Add and Drop Multiplexer Optical Add/Drop Multiplexer)) inside shown in Figure 5.Parts 1～parts 9 are the wavelength-division network existing equipment among the figure, the equipment in the capacity expansion that parts 20 increase newly for the wavelength dilatation.Between parts 1～parts 9 each equipment by original network monitoring information channel (as OSC) intercommunication network monitor message, direct intercommunication network monitor message between the equipment in the capacity expansion 20 that increases newly and the parts 1～parts 9.The optical sender output of described equipment in the capacity expansion 20 is received the corresponding input port of original OM of wavelength-division network or OADM; The optical receiver input of described equipment in the capacity expansion 20 is then received the delivery outlet of former wavelength-division network OD or OADM correspondence.Equipment in the capacity expansion and existing equipment do not have the annexation on the network monitoring information channel.
In actual use, the dilatation scheme of concrete enforcement has two kinds:
Scheme one, described network monitoring information is to transmit with the mode that service signal is packed.This scheme comprises that employing need improve outer ECC (the Embedded ControlChannel embedded control channel) mode of band of signal transmission rate, the interior ECC of band that utilizes the idle bytes realization network monitoring information in the service signal structure to transmit is with the mode of outer ECC (Embedded Control Channel embedded control channel), perhaps adopts accent top, sub-carrier modulation technology the transmission light signal to be carried out the transmission of secondary modulation realization network monitoring information.In equipment in the capacity expansion as shown in Figure 2, optical-electrical converter 31 receives service signal waiting for transmission and gives signal processing unit 33; The mode that signal processing unit 33 adopts byte to interleave, the monitor message that service signal that optical-electrical converter 31 is sent here and network monitoring and communication unit 37 are sent here merges coding, and the complete composite signal of encapsulation of will encoding is at last given light signal that Optical Transmit Unit 35 converts specific wavelength to and sent into wavelength-division network and transmit; Optical receiver is partly finished the inverse process of optical transmitter part: the light signal that light receiving unit 36 will transmit, separate through wavelength-division network receives, and gives signal processing unit 34; Signal processing unit 34 is finished the decoding of composite signal, isolates service signal and network monitoring information, gives electrical to optical converter 32 with isolated service signal and sends, gives network monitoring and communication unit 37 with isolated network monitoring information.
The wavelength-division network wavelength dilatation signal of corresponding scheme one as shown in Figure 6.Among Fig. 6, parts 11～parts 14 are the wavelength-division network existing equipment, by original network monitoring information channel (as OSC) intercommunication network monitor message, be direct intercommunication network monitor message between the newly-increased equipment in the capacity expansion 20 of wavelength dilatation and equipment in the capacity expansion 21 and the parts 11～parts 14 between parts 11～parts 14 each equipment.Equipment in the capacity expansion 20 and equipment in the capacity expansion 21 each self-contained optical sender, optical receiver and the network monitoring and the control unit of opposite end with it.The network monitoring information that the optical sender of equipment in the capacity expansion 20 is sent service signal, our station or network management system here etc. are packed together and are sent.Equipment in the capacity expansion 21 receives the light signal that equipment in the capacity expansion 20 sends, service signal and network monitoring information are isolated in decoding, the network monitoring of equipment in the capacity expansion 21 and control unit are handled network monitoring information, the network monitoring information that to handle is then passed to the optical sender of equipment in the capacity expansion 21, sends after monitor message that the optical sender of equipment in the capacity expansion 21 will be handled and the business information packing.The receiver of equipment in the capacity expansion 20 beams back light signal to receive equipment in the capacity expansion 21 again, isolates service signal and monitor message.
In this programme, the network monitoring of equipment in the capacity expansion 20 and equipment in the capacity expansion 21 and control unit are except setting up the monitor message passage in the equipment of this dilatation website, outside processing and the delivery network monitor message, also set up the monitor message passage of (for example equipment 20 and equipment are 21) between station and the station equipment in the capacity expansion with optical sender, optical receiver, operating state or command response result that the information that the network monitoring of equipment in the capacity expansion 20 and control unit basis are returned can be known distance station equipment in the capacity expansion 21 can also pass to these information the network management system end.Construct another network monitoring information channel that is independent of former network monitoring information channel between the equipment in the capacity expansion thus, can realize service signal transmission and network monitoring function simultaneously.
Scheme two, described network monitoring information is to transmit by the individual channel mode, for example any ways such as the OSC by using separately a wavelength of wavelength-division network, data communication network, DDN special line, Dial-up Network, wireless network are realized the transmission of monitor message.In equipment in the capacity expansion as shown in Figure 7, optical sender comprises: an optical-electrical converter is used to receive service signal; One processing unit that transmits is used for monitors transmitted signal quality state, and with network monitoring and communication unit switching network monitor message; One Optical Transmit Unit is sent into the wavelength-division network transmission after being used for described conversion of signals become the light signal of specific wavelength; Described optical receiver comprises: a light receiving unit is used to receive the light signal that transmits and be separated through wavelength-division network; One received signal processing unit is used to monitor the received signal quality state, and with network monitoring and communication unit switching network monitor message; One electrical to optical converter is used for converting the service signal through the wavelength-division network transmission to light signal and sending; And described network monitoring and communication unit have the special-purpose monitoring and controlling channels transmitting-receiving interface that is used for the transceiver network monitor message of at least one cover, and interface type can be one or more in optical interface, infrared communication interface, radio communication interface, DDN interface, RS232 serial line interface, modem interface and the TCP/IP interface of specific wavelength.
Be illustrated in figure 8 as scheme two wavelength-division network wavelength dilatation schematic diagrames, as shown in the figure, be connected to each other between the monitoring and controlling channels transmitting-receiving interface of described equipment in the capacity expansion, comprise between the monitoring and controlling channels transmitting-receiving interface by signal relay station or transferring equipment realization equipment in the capacity expansion and being connected to each other, described network monitoring information is received and dispatched interface by above-mentioned certain type monitoring and controlling channels, transmit between newly-increased equipment in the capacity expansion in above-mentioned certain mode, set up the network monitoring information channel between the newly-increased equipment in the capacity expansion thus.
In above-mentioned equipment in the capacity expansion, light receiving unit also has the power that monitors and report received signal, the error rate, the ability of one or more mass parameters such as signal to noise ratio, and have at least a unit to have in Optical Transmit Unit and the light receiving unit and adjust self running parameter automatically to improve the ability of signal transmission quality according to the mass parameter of received signal, the method of specific implementation is: to monitor the signal light power that equipment in the capacity expansion 20 sends low excessively when the light receiving unit of as shown in Figure 6 equipment in the capacity expansion 21, the error rate is when higher, equipment in the capacity expansion 21 is with the luminous power that monitors, error code information is passed through the monitor message channel transfer to equipment in the capacity expansion 20, equipment in the capacity expansion 20 is according to the transmission optical signal power of this information raising self Optical Transmit Unit, the luminous power that equipment in the capacity expansion 21 is received improves, and the error rate reduces.
No matter be scheme one or scheme two,, then can adopt the mode that increases more optical sender, optical receiver to realize if expand more wavelength.And described dilatation scheme can be applied to multiple wavelength-division network, as: the situation that is applied to the middle no image intensifer of point-to-point wavelength-division network; Be applied to the middle situation that image intensifer is arranged of point-to-point wavelength-division network; Be applied to the situation of ring wave division network; Be applied to the situation of T type wavelength-division network; Be applied to chain wavelength-division network and centre wavelength situation is up and down arranged; Can also be applied to the situation of the wavelength-division networks of 2 kinds of above combinations of structure in point-to-point, chain, T type, the loop configuration.
In sum, wavelength capacity expansion and upgrading scheme of the present invention can realize the dilatation of wavelength-division network wavelength, has independently network monitoring information channel simultaneously, the managing of network can be realized, requirement can be runed, can on the wavelength-division network of different manufacturers, realize the wavelength dilatation, avoid present wavelength-division dilatation to depend on expensive problem and supply of material risk that former wavelength-division manufacturer brings.
Be understandable that, for those of ordinary skills, can be equal to replacement or change according to technical scheme of the present invention and inventive concept thereof, and all these changes or replacement all should belong to the protection range of the appended claim of the present invention.
Claims (12)
1. the expansion method of a wavelength division multiplexed optical network is characterized in that: said method comprising the steps of:
A, at the corresponding equipment in the capacity expansion that increases of the wavelength-division network section two ends website that is needing dilatation, described equipment in the capacity expansion comprises: the optical sender that is used to produce newly-increased optical wavelength signal, be used to receive the optical receiver of described newly-increased optical wavelength signal, be used to handle the network monitoring and the communication unit of network monitoring information;
After closing the road, the newly-increased optical wavelength signal that B, each dilatation website are exported the optical sender of described equipment in the capacity expansion respectively and original wavelength signals in optical fiber, transmit;
The described newly-increased optical wavelength signal that C, each dilatation website send distance station respectively, the process wavelength-division network is transferred to our station and be separated inserts the optical receiver of the described equipment in the capacity expansion of our station;
D, set up the dilatation network monitoring information channel be used for transmitting monitor message between the equipment in the capacity expansion of described each website, described dilatation network monitoring information channel is independent of legacy network monitor message passage.
2. expansion method according to claim 1, it is characterized in that: the described dilatation network monitoring of step D information channel is set up by described network monitoring and communication unit, described network monitoring and communication unit are connected with described optical sender, described optical receiver respectively, described network monitoring information and service signal are lumped together between the equipment in the capacity expansion of corresponding end transmit.
3. expansion method according to claim 2 is characterized in that: described network monitoring information is passed through a kind of transmission in the following manner: be with outer embedded control channel mode; Perhaps band is embedded in formula control channel mode; Perhaps the emission light signal is transferred the top mode; Perhaps the emission light signal is carried out the mode of sub-carrier modulation.
4. expansion method according to claim 1, it is characterized in that: the described dilatation network monitoring of step D information channel is set up by described network monitoring and communication unit, described network monitoring and communication unit have the monitoring and controlling channels transmitting-receiving interface that at least one cover is used for the transceiver network monitor message, and described monitoring and controlling channels transmitting-receiving interface is connected to each other between the equipment in the capacity expansion, transmits described network monitoring information by described monitoring and controlling channels transmitting-receiving interface with the individual channel mode.
5. expansion method according to claim 4 is characterized in that: a kind of transmission of described network monitoring information in the following manner: use the OSC monitoring and controlling channels of a wavelength to transmit separately; Perhaps transmit by data communication network; Perhaps transmit by the dialing network; Perhaps transmit by RS232 or RS422 standard interface serial-port; Perhaps transmit by the DDN special line; Perhaps transmit by radio communication network; Perhaps connect and transmit by infrared ray.
6. according to the described expansion method of the arbitrary claim of claim 1-5, it is characterized in that: the output of the described optical sender of step B is received the corresponding input of original OM of wavelength-division network or Optical Add/Drop Multiplexer, and the input of the described optical receiver of step C is received the corresponding output of original OM of wavelength-division network or Optical Add/Drop Multiplexer.
7. the equipment in the capacity expansion of a wavelength division multiplexed optical network, it is characterized in that: it comprises at least one optical sender, is used to produce and send the optical wavelength signal that meets the wavelength-division network requirement; At least one optical receiver is used to receive the optical wavelength signal through the wavelength-division network transmission; Also comprise at least one network monitoring and communication unit, be used for handling and the delivery network monitor message, described network monitoring and communication unit are connected with optical receiver with described optical sender respectively, and be connected with the opposite end equipment in the capacity expansion, set up dilatation network monitoring information channel, described dilatation network monitoring information channel is independent of legacy network monitor message passage.
8. equipment in the capacity expansion according to claim 7 is characterized in that: described optical sender comprises: an optical-electrical converter is used to receive service signal; One processing unit that transmits is used for the monitor message that described service signal and described network monitoring and communication unit transmit merged and is encoded into composite signal; One Optical Transmit Unit is sent into the wavelength-division network transmission after being used for converting described composite signal the light signal of specific wavelength to;
Described optical receiver comprises: a light receiving unit is used to receive the light signal that transmits and be separated through wavelength-division network; One received signal processing unit is used for isolating described service signal and described monitor message and described monitor message being sent to described network monitoring and communication unit from described light signal; One electrical to optical converter, the service signal that is used for separating converts light signal to and sends;
Described network monitoring and communication unit with described transmit between the processing unit and with described received signal processing unit between link to each other.
9. equipment in the capacity expansion according to claim 7 is characterized in that: described optical sender comprises: an optical-electrical converter is used to receive service signal; One processing unit that transmits is used for monitors transmitted signal quality state, and with network monitoring and communication unit switching network monitor message; One Optical Transmit Unit is sent into the wavelength-division network transmission after being used for converting described service signal the light signal of specific wavelength to;
Described optical receiver comprises: a light receiving unit is used to receive the light signal that transmits and be separated through wavelength-division network; One received signal processing unit is used to monitor the received signal quality state, and with network monitoring and communication unit switching network monitor message; One electrical to optical converter is used for converting the service signal through the wavelength-division network transmission to light signal and sending;
Described network monitoring and communication unit with described transmit between the processing unit and with described received signal processing unit between link to each other, and described network monitoring and communication unit have the special-purpose monitoring and controlling channels transmitting-receiving interface of at least one cover, are used for the transceiver network monitor message.
10. equipment in the capacity expansion according to claim 9 is characterized in that: described monitoring and controlling channels transmitting-receiving interface comprises: the optical interface of specific wavelength; Perhaps infrared communication interface; Perhaps radio communication interface; Perhaps DDN interface; Perhaps RS232 serial line interface; Perhaps modem interface; Or TCP/IP interface.
11. according to Claim 8 or 9 described equipment in the capacity expansions, it is characterized in that: described light receiving unit can monitor and report the mass parameter of received signal, have at least a unit to adjust self running parameter automatically in described Optical Transmit Unit and the light receiving unit, to improve signal transmission quality according to the mass parameter of received signal.
12. equipment in the capacity expansion according to claim 11 is characterized in that: described mass parameter comprises: the power of received signal, the error rate or signal to noise ratio.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100049828A CN100391140C (en) | 2004-02-12 | 2004-02-12 | Method and apparatus for expanding wavelength-division multiplexing optical networks |
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| CNB2004100049828A CN100391140C (en) | 2004-02-12 | 2004-02-12 | Method and apparatus for expanding wavelength-division multiplexing optical networks |
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| CN100391140C true CN100391140C (en) | 2008-05-28 |
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| CN101807958B (en) * | 2010-03-18 | 2013-03-20 | 烽火通信科技股份有限公司 | On-line upgrading capacity expansion power adjusting method of wavelength division multiplexing optical transmission system |
| CN102170310B (en) * | 2011-05-06 | 2016-12-28 | 中兴通讯股份有限公司 | A kind of method and device of optical network path detection |
| CN114050885B (en) * | 2021-08-30 | 2023-06-09 | 国网山东省电力公司信息通信公司 | Convergence service channel cutting-over method based on POS optical port |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010004290A1 (en) * | 1999-12-21 | 2001-06-21 | Lee Chang Hee | Low-cost WDM source with an incoherent light injected fabry-perot laser diode |
| CN1449145A (en) * | 2002-03-29 | 2003-10-15 | 华为技术有限公司 | Capacity upgrading method for dense wavelength division multiplexing optical fiber transmission system |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010004290A1 (en) * | 1999-12-21 | 2001-06-21 | Lee Chang Hee | Low-cost WDM source with an incoherent light injected fabry-perot laser diode |
| CN1449145A (en) * | 2002-03-29 | 2003-10-15 | 华为技术有限公司 | Capacity upgrading method for dense wavelength division multiplexing optical fiber transmission system |
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