CN105790839B - A kind of fibre system and method based on the unglazed relaying of wavelength-division multiplex - Google Patents
A kind of fibre system and method based on the unglazed relaying of wavelength-division multiplex Download PDFInfo
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- CN105790839B CN105790839B CN201610352972.6A CN201610352972A CN105790839B CN 105790839 B CN105790839 B CN 105790839B CN 201610352972 A CN201610352972 A CN 201610352972A CN 105790839 B CN105790839 B CN 105790839B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2589—Bidirectional transmission
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0201—Add-and-drop multiplexing
Abstract
A kind of fibre system and method based on the unglazed relaying of wavelength-division multiplex, it is related to wavelength-division multiplex technique field, including access central office and multiple network nodes, access central office includes a subband channel join-splitting device, two optical add/drop multiplexers and access device including two channel join-splitting devices, a photoswitch, multiple optical add/drop multiplexers and an access central apparatus, each network node；Channel join-splitting device is used for multiplex, the partial wave function for completing multiple business glories；Optical add/drop multiplexer is used to complete the upper ripple of multichannel list business glory and lower ripple, and upper ripple and lower ripple are sent into corresponding access central apparatus or access device；Subband channel join-splitting device is used to the broadband services glory of network node carrying out multiplex, partial wave；Photoswitch is used for the reception and transmission for completing business glory optical signal on circuit.The present invention using light path asymmetry method, solves the problems, such as transmission span of all kinds of Access Layers based on wavelength-division multiplex technique, reduces cost of implementation in the case of without light relay equipment.
Description
Technical field
The present invention relates to wavelength-division multiplex technique field, in particular to a kind of optical fiber based on the unglazed relaying of wavelength-division multiplex
System and method.
Background technology
In a communication network, with LTE (Long Term Evolution, Long Term Evolution), the arrival in 4G and 5G epoch,
Metro edge, flattening are more and more obvious, the capacity requirement explosive growth of all kinds of access aspects；Wireless C-RAN forward pass nets
The broadband access networks such as network, mobile retransmission network and visualization video, drastically accelerate the optical cable fibre core of all kinds of access aspects
Consumption.How effectively to solve to expand and lifting is currently accessed a layer optical cable fibre core consumption, reduce to greatest extent and pore resource is accounted for
With currently having urgent practical significance；Wavelength-division multiplex and single fiber bi-directional technology are quoted in all kinds of access aspects, will effectively be solved
Certainly above-mentioned problem.
But traditional wavelength-division multiplex optical fiber scheme is symmetrical expression optical link pattern, the intrinsic Insertion Loss of wavelength-division multiplex optical device and right
Title property, is equivalent to the loss for further increasing fiber link, shortens the coverage of all kinds of Access Layer transmission；It can only rely on
Increase light relay equipment is transmitted the extension of distance, improves cost of implementation.In addition, increase light relay equipment is to luminous power
Flatness requirement it is more strict, it is necessary to all optical wavelength power flatnesses into light relay equipment in certain index (such as
Deviation is in the range of -1dB~+1dB), it is desirable to Personnel Skill Levels are higher.
The content of the invention
For defect present in prior art, it is an object of the invention to provide one kind to be based on the unglazed relaying of wavelength-division multiplex
Fibre system and method, in the case of without light relay equipment, using the method for light path asymmetry, solve all kinds of accesses
Transmission span problem of the layer based on wavelength-division multiplex technique, reduces cost of implementation, reduces the restriction of flatness, and then reduce work
Journey is implemented and Personnel Skill Levels is relied in safeguarding.
To achieve the above objectives, the present invention takes a kind of fibre system based on the unglazed relaying of wavelength-division multiplex, including access
Central office and multiple network nodes, access central office include two channel join-splitting devices, a photoswitch, multiple optical add/drop multiplexers and
One access central apparatus, the access central apparatus are connected by multiple optical add/drop multiplexers and the photoswitch signal
Connect, multiple optical add/drop multiplexers in parallel, two conjunction partial waves between the access central apparatus and the photoswitch
Device is connected with the photoswitch signal, and each network node includes a subband channel join-splitting device, two optical add/drop multiplexers and every
The access device of individual optical add/drop multiplexer connection；The channel join-splitting device is used for multiplex, the partial wave function for completing multiple business glories；
The optical add/drop multiplexer is used to complete the upper ripple of multichannel list business glory and lower ripple, and upper ripple and lower ripple are sent into corresponding connect
Enter central apparatus or access device；The subband channel join-splitting device is used to the broadband services glory of network node carrying out multiplex, divided
Ripple, asymmetric east, the business coloured silk of two, west line direction will be divided into after the synthesis of subband business glory of the two-way containing more ripples
Light optical signal, or by from east, two, west line direction asymmetric traffic glory optical signal multiplex after, be divided into two-way and contain more ripples
Subband business glory；The photoswitch is used for the reception and transmission for completing business glory optical signal on circuit.
On the basis of above-mentioned technical proposal, the photoswitch enters to the business glory optical signal from access central apparatus
Row is published, and is sent to east orientation circuit or west to circuit；Or to from east orientation circuit or the western business glory optical signal to circuit
Choosing receipts are carried out, choosing gives access central apparatus after receiving.
On the basis of above-mentioned technical proposal, subband business glory of the two-way containing more ripples of subband channel join-splitting device, come respectively
From coupled optical add/drop multiplexer.
The present invention also provides a kind of method based on the unglazed relaying of wavelength-division multiplex based on above-mentioned fibre system, lower ripple side
Formula, the channel join-splitting device of central office is accessed by after multiple business glories progress multiplex, sends the subband channel join-splitting device of network node to,
Subband channel join-splitting device is by the business glory after channel join-splitting device multiplex processing and from other direction asymmetric traffic coloured silk
After light carries out multiplex, it is divided into subband business glory of the two-way containing more ripples, per road after an optical add/drop multiplexer, it would be desirable under
Single business glory of ripple gives access device；Upper ripple mode, two optical add/drop multiplexers in network node are by multichannel list business
It is each to form the subband business glory containing more ripples all the way after glory carries out upper ripple multiplexing, subband channel join-splitting device is given, subband, which closes, to be divided
Ripple device is divided into asymmetric east, two, west circuit by after subband business glory synthetic wideband business glory of this two-way containing more ripples
The business glory optical signal in direction, the channel join-splitting device of access central office is given respectively.
On the basis of above-mentioned technical proposal, during lower ripple mode, access central apparatus insert business glory by light point multiple
Photoswitch is passed to device, any one channel join-splitting device is sent in photoswitch control business glory optical signal selection access central office.
On the basis of above-mentioned technical proposal, during upper ripple mode, photoswitch selection receives any one in access central office
The business glory optical signal of channel join-splitting device control, and access central apparatus are sent to by optical add/drop multiplexer.
On the basis of above-mentioned technical proposal, the east orientation received optical power of photoswitch and the western difference to both received optical powers
Value, less than the difference of the overload point luminous power and both sensitivity luminous powers of appliance services module, the appliance services module is set
It is placed in access central apparatus and access device.
The present invention also provides another fibre system based on the unglazed relaying of wavelength-division multiplex, including access central office and multiple
Network node, access central office includes a channel join-splitting device, an optical add/drop multiplexer and an access central apparatus, described to connect
Entering central apparatus, the optical add/drop multiplexer and the channel join-splitting device, signal connects successively, and each network node includes one
The access device that subband channel join-splitting device, two optical add/drop multiplexers connect with each optical add/drop multiplexer；The channel join-splitting device is used
In multiplex, the partial wave function of completing multiple business glories；The optical add/drop multiplexer is used to complete multichannel list business glory
Ripple and lower ripple, and upper ripple and lower ripple are sent to corresponding access central apparatus or access device；The subband channel join-splitting device is used for
The broadband services glory of network node is subjected to multiplex, partial wave, by after subband business glory synthesis of the two-way containing more ripples, divided
Believe into east orientation or the western business glory optical signal to line direction, or by east orientation or west to the business glory light of line direction
Number, it is divided into subband business glory of the two-way containing more ripples.
On the basis of above-mentioned technical proposal, the multiple network node chain cascade, the coverage of total cascaded link
In 25km.
On the basis of above-mentioned technical proposal, subband business glory of the two-way containing more ripples of each subband channel join-splitting device, point
Not from coupled optical add/drop multiplexer.
The beneficial effects of the present invention are：
1st, in the case of without light relay equipment, by the method for light path asymmetry, realize that all kinds of Access Layers are based on ripple
Divide the transmission of multiplexing technology, solve the problems, such as that transmission span is limited, in unglazed relay transmission, actual transmissions are up to 25km.No
Using light relay equipment, the restriction that luminous power flatness is brought is effectively prevent, while reduces Practical Project and implements and safeguard
In dependence to Personnel Skill Levels.
2nd, the fibre system that the asymmetric loop band based on wavelength-division multiplex zooms out, adapt to each type optical fiber of current and future and connect
Enter the typical scene of aspect network topology, there is general applicability.It can support to access up to 4 loop network nodes, zoom out more
Zoomed out a little to 8.It can also be applied in the case where unshielded chain cascades scene, it is different according to distance between network node, 3 can be supported
Level, 2 grades, 1 grade of cascade；Total cascaded transmission distance is up to 25km.
3rd, fibre circuit cyclization is realized using asymmetry light path method, fibre circuit is possessed Protection path, significantly
Improve the reliability of network.
4th, access layer network uses wavelength-division multiplex and single fiber bi-directional technology, greatly improves fiber core service efficiency, most
Limits reduce the consumption of optical cable fibre core and to pore resource occupation, great realistic price.
Brief description of the drawings
Fig. 1 is fibre system schematic diagram of the embodiment of the present invention one based on the unglazed relaying of wavelength-division multiplex；
Fig. 2 is the service route schematic diagram of the embodiment of the present invention one；
Fig. 3 is fibre system schematic diagram of the embodiment of the present invention two based on the unglazed relaying of wavelength-division multiplex；
Fig. 4 is the service route schematic diagram of the embodiment of the present invention two.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
Embodiment one：
As shown in figure 1, the fibre system based on the unglazed relaying of wavelength-division multiplex is in the present embodiment, asymmetric loop is taken
Band zooms out the looped network application mode of function.The fibre system includes an access central office and multiple network nodes, in access
Heart office includes two channel join-splitting devices, a photoswitch, multiple optical add/drop multiplexers and an access central apparatus, and access center is set
Standby to be connected by multiple optical add/drop multiplexers with photoswitch signal, multiple optical add/drop multiplexers are in access central apparatus and photoswitch
Between it is in parallel, two channel join-splitting devices are connected with photoswitch signal；Each network node includes a subband channel join-splitting device, two light
The access device that add-drop multiplexer and each optical add/drop multiplexer are connected.The network node can be arranged on light cross-connecting box,
When it is apart from each other with access device, then using function connects are zoomed out, 100m~5km can be zoomed out；If with access device distance
It is relatively near, it can also be directly connected to by light jumping fiber.In the present embodiment, the transmission range of loop network link is up to 25km.
Wherein, channel join-splitting device is used for the multiplex and partial wave function for completing multiple business glory wavelength.Optical add/drop multiplexer, use
In the upper ripple and lower ripple of completing multichannel list business glory, if the optical add/drop multiplexer in access central office, then by upper ripple and
Lower ripple is sent to access central apparatus；If the optical add/drop multiplexer of network node, then upper ripple and lower ripple are sent to corresponding connect
Enter equipment.The subband channel join-splitting device is used to the broadband services glory of network node carrying out multiplex, partial wave, future automatic network section
In point after subband business glory synthesis of the two-way of optical add/drop multiplexer containing more ripples, it is divided into asymmetric east, two, west circuit side
To business glory optical signal；Or by from east, two, west line direction asymmetric traffic glory optical signal multiplex after, be divided into
Subband business glory of the two-way containing more ripples, it is respectively issued to the optical add/drop multiplexer of the network node.The photoswitch is used to complete
The reception and transmission of business glory optical signal on circuit, the business glory optical signal from access central apparatus is published,
East orientation circuit or west are sent to circuit；Or to being selected from east orientation circuit or west to the business glory optical signal of circuit
Receive, choosing gives access central apparatus after receiving.
A kind of method based on the unglazed relaying of wavelength-division multiplex based on above-mentioned fibre system, is specifically included such as lower part：
Business glory is passed to photoswitch, photoswitch control by lower ripple mode, access central apparatus by optical add/drop multiplexer
Business glory optical signal, selection access any one channel join-splitting device in central office and sent.It will be more to access the channel join-splitting device of central office
After individual business glory carries out multiplex, the subband channel join-splitting device of network node is sent to, subband channel join-splitting device will pass through channel join-splitting device
Multiplex processing after business glory and from other direction asymmetric traffic glory carry out multiplex after, be divided into son of the two-way containing more ripples
Band business glory, often all the way after an optical add/drop multiplexer, it would be desirable to which single business glory of lower ripple gives access device.
Upper ripple mode, two optical add/drop multiplexers in network node, by multichannel list business glory (from network node
Access device) carry out upper ripple multiplexing after, it is each to form the subband business glory containing more ripples all the way, give subband channel join-splitting device；Son
With channel join-splitting device by after subband business glory synthetic wideband business glory of this two-way containing more ripples, it is divided into asymmetric east, west two
The business glory optical signal of individual line direction, the channel join-splitting device of access central office is given respectively.Photoswitch selection is received in access
The control business glory optical signal of any one channel join-splitting device of heart intra-office, and access center is sent to by optical add/drop multiplexer and set
It is standby.
As shown in Fig. 2 the link of the service route schematic diagram, for convenience of explanation service route for the embodiment of the present invention one
Deployment calculates, and to illustrate, other each network nodes remove the traffic direction all the way in the present embodiment only using a network node
The specific digital value (r%) of asymmetric splitting ratio has differences outer, and other directions are implemented identical with Computing Principle.
For the ease of description, represented in a manner of dotted arrow in Fig. 2 debit in circuit to originating party to signal stream, and mark
Relevant identifier is noted, its implication is as shown in table 1.
Table 1
By taking the signal flow direction in a direction as an example (access central office side is received, access device end hair), the two of central office is accessed
Individual channel join-splitting device, it is respectively western to the channel join-splitting device of connection and the channel join-splitting device of east orientation connection, accesses central apparatus
With appliance services module is equipped with access device.
When the 1st, disposing, fiber link control calculating process is as follows：
West is to circuit：P receives W=P hair-(Ladj+La+Lwad+L5+Lomdw)；
East orientation circuit：
P receives E=P hair-(Ladj+La+Lead+L1+Lct+L2+Lct+L3+Lct+L4+Lomde.
2nd, receiving end received optical power must is fulfilled for：
P receives sensitivity<P is received<P receives overload point.
It is above-mentioned to be equivalent to must be fulfilled for：
West to：P receives sensitivity<P receives W- (Ladc+Losw)<P receives overload point.
East orientation：P receives sensitivity<P receives E- (Ladc+Losw)<P receives overload point.
3rd, engineering construction also needs to meet：
| P receives W-P and receives E |<| P receives overload point-P and receives sensitivity |.
The east orientation line receiver luminous power of photoswitch and the western difference to both line receiver luminous powers, it is necessary to less than equipment
The difference of the overload point luminous power of business module and both sensitivity luminous powers (can increase light decay diminution on power the greater
Difference).
Embodiment two：
As shown in figure 3, the fibre system based on the unglazed relaying of wavelength-division multiplex, the present embodiment uses multiple network node chains
The mode of cascade, including access central office and multiple network nodes, access central office includes a channel join-splitting device, a light point is inserted
Multiplexer and an access central apparatus, the access central apparatus, the optical add/drop multiplexer and the channel join-splitting device according to
Secondary signal connection, each network node include a subband channel join-splitting device, two optical add/drop multiplexers and each OADM
The access device of device connection.Wherein, the channel join-splitting device for accessing central office is used for multiplex, the partial wave for completing multiple business glory wavelength
Function.The optical add/drop multiplexer is used to complete the upper ripple of multichannel list business glory and lower ripple, and upper ripple and lower ripple are sent to pair
The access central apparatus or access device answered.The subband channel join-splitting device is used to be closed the broadband services glory of network node
Ripple, partial wave, by after subband business glory synthesis of the two-way containing more ripples, it is divided into the business glory of east orientation or west to line direction
Optical signal, or east orientation or west are divided into subband business glory of the two-way containing more ripples to the business glory optical signal of line direction.
Wherein, subband business glory of the two-way of each subband channel join-splitting device containing more ripples, respectively from coupled OADM
Device.In the present embodiment, the coverage of total cascaded link is in 25km.In the present embodiment, the principle base of principle and embodiment one
This is identical, only takes one of direction (east orientation or west to) parsing, here is omitted.
As shown in figure 4, service route link deployment in the present embodiment, with the western to circuit of the business all the way of network node 4
Exemplified by link (take east orientation link with this similarly), other each network nodes are except the specific digital value of asymmetric splitting ratio
(r%) outside having differences, other implementations are identical with Computing Principle.In Fig. 4, represented in a manner of dotted arrow in link debit to
Originating party to signal stream, with access device end send out, access central office receive exemplified by, represent implication based on the correlated identities in table 1：
When the 1st, disposing, fiber link control calculating process：
West is to circuit：
P receipts=P hair-(Ladj+La+Lead+L3+Lct+L2+Lct+L1+Lct+L5+Lomdw+Ladc).
2nd, receiving end received optical power must is fulfilled for：
P receives sensitivity<P is received<P receives overload point.
If so, new local side hair, access device end are received in access, direction is above-mentioned reverse process, and principle is identical, herein not
Repeat again.
The present invention is not limited to the above-described embodiments, for those skilled in the art, is not departing from
On the premise of the principle of the invention, some improvements and modifications can also be made, these improvements and modifications are also considered as the protection of the present invention
Within the scope of.The content not being described in detail in this specification belongs to prior art known to professional and technical personnel in the field.
Claims (10)
- A kind of 1. fibre system based on the unglazed relaying of wavelength-division multiplex, it is characterised in that：Including access central office and multiple networks Node, access central office are set including two channel join-splitting devices, a photoswitch, multiple optical add/drop multiplexers and an access center Standby, the access central apparatus are connected by multiple optical add/drop multiplexers with the photoswitch signal, multiple light point Insert multiplexer is in parallel between the access central apparatus and the photoswitch, and two channel join-splitting devices are believed with the photoswitch Number connection, each network node includes a subband channel join-splitting device, two optical add/drop multiplexers and each optical add/drop multiplexer connect The access device connect；The channel join-splitting device is used for multiplex, the partial wave function for completing multiple business glories；The optical add/drop multiplexer is used to complete the upper ripple of multichannel list business glory and lower ripple, and upper ripple and lower ripple are sent to correspondingly Access central apparatus or access device；The subband channel join-splitting device is used to the broadband services glory of network node carrying out multiplex, partial wave, will come from two-way containing more After the subband business glory synthesis of ripple, it is divided into asymmetric east, the business glory optical signal of two, west line direction, or will come from East, two, west line direction asymmetric traffic glory optical signal multiplex after, be divided into subband business glory of the two-way containing more ripples；The photoswitch is used for the reception and transmission for completing business glory optical signal on circuit.
- 2. the fibre system as claimed in claim 1 based on the unglazed relaying of wavelength-division multiplex, it is characterised in that：The photoswitch pair Business glory optical signal from access central apparatus is published, and is sent to east orientation circuit or west to circuit；Or to from East orientation circuit or west carry out choosing receipts to the business glory optical signal of circuit, and choosing gives access central apparatus after receiving.
- 3. the fibre system as claimed in claim 1 based on the unglazed relaying of wavelength-division multiplex, it is characterised in that：Subband channel join-splitting device Subband business glory of the two-way containing more ripples, respectively from coupled optical add/drop multiplexer.
- A kind of 4. method based on the unglazed relaying of wavelength-division multiplex based on fibre system described in claim 1, it is characterised in that：Lower ripple mode, the channel join-splitting device of central office is accessed by after multiple business glories progress multiplex, sends the son of network node to Band channel join-splitting device, subband channel join-splitting device by by the channel join-splitting device multiplex processing after business glory and from other direction not After symmetrical service glory carries out multiplex, it is divided into subband business glory of the two-way containing more ripples, passes through an optical add/drop multiplexer per road Afterwards, it would be desirable to which single business glory of lower ripple gives access device；Upper ripple mode, after multichannel list business glory is carried out upper ripple multiplexing by two optical add/drop multiplexers in network node, each shape Into the subband business glory containing more ripples all the way, subband channel join-splitting device is given, subband channel join-splitting device is by son of this two-way containing more ripples After band business glory synthetic wideband business glory, it is divided into asymmetric east, the business glory optical signal of two, west line direction, point The channel join-splitting device of access central office is not given.
- 5. the method as claimed in claim 4 based on the unglazed relaying of wavelength-division multiplex, it is characterised in that：During lower ripple mode, access Business glory is passed to photoswitch, the selection access of photoswitch control business glory optical signal by central apparatus by optical add/drop multiplexer Any one channel join-splitting device is sent in central office.
- 6. the method as claimed in claim 4 based on the unglazed relaying of wavelength-division multiplex, it is characterised in that：During upper ripple mode, light is opened Close selection and receive the business glory optical signal of any one channel join-splitting device control in access central office, and pass through optical add/drop multiplexer It is sent to access central apparatus.
- 7. the method as claimed in claim 4 based on the unglazed relaying of wavelength-division multiplex, it is characterised in that：The east orientation of photoswitch receives Luminous power and the western difference to both received optical powers, less than overload point luminous power and the sensitivity luminous power of appliance services module The difference of the two, the appliance services module are arranged at access central apparatus and access device.
- A kind of 8. fibre system based on the unglazed relaying of wavelength-division multiplex, it is characterised in that：Including access central office and multiple networks Node, access central office includes a channel join-splitting device, an optical add/drop multiplexer and an access central apparatus, in the access Signal connects successively for heart equipment, the optical add/drop multiplexer and the channel join-splitting device, and each network node includes a subband The access device that channel join-splitting device, two optical add/drop multiplexers connect with each optical add/drop multiplexer；The channel join-splitting device is used for multiplex, the partial wave function for completing multiple business glories；The optical add/drop multiplexer is used to complete the upper ripple of multichannel list business glory and lower ripple, and upper ripple and lower ripple are sent to correspondingly Access central apparatus or access device；The subband channel join-splitting device is used to the broadband services glory of network node carrying out multiplex, partial wave, will come from two-way containing more After the subband business glory synthesis of ripple, it is divided into the business glory optical signal of east orientation or west to line direction, or by east orientation or west To the business glory optical signal of line direction, it is divided into subband business glory of the two-way containing more ripples.
- 9. the fibre system as claimed in claim 8 based on the unglazed relaying of wavelength-division multiplex, it is characterised in that：The multiple network Node chain cascades, and the coverage of total cascaded link is in 25km.
- 10. the fibre system as claimed in claim 8 based on the unglazed relaying of wavelength-division multiplex, it is characterised in that：Each subband closes Subband business glory of the two-way of channel-splitting filter containing more ripples, respectively from coupled optical add/drop multiplexer.
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| CN114826407A (en) * | 2021-01-29 | 2022-07-29 | 华为技术有限公司 | Communication system, data transmission method and related equipment |
| CN115811673A (en) * | 2021-09-14 | 2023-03-17 | 华为技术有限公司 | Local side node, leaf node and optical communication network |
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