CN104023282A - Open network architecture based on wavelength division PON system, and signal transmission method - Google Patents
Open network architecture based on wavelength division PON system, and signal transmission method Download PDFInfo
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Abstract
The invention discloses an open network architecture based on a wavelength division PON system, and a signal transmission method, and relates to the field of a PON optical access technology. The network architecture comprises a control unit, a service selection unit, an optical transceiving array unit, a clock unit and a plurality of service side optical modules. The control unit is respectively connected with the service selection unit, the optical transceiving array unit and the clock unit; each service side optical module is connected with a service provider device; the service selection unit is provided with a plurality of service data channels; each service side optical module is connected with the optical transceiving array unit through the data channels corresponding to services; and the optical transceiving array unit is connected with the optical modules of all ORU devices through an AWG. According to the invention, multiple different services can be accessed to the same optical access basic facility in an integrated mode, uplink and downlink signal transmission of multiple different services can be finished; and the service access capability is quite high, the application scope is quite wide, resources can be shared, and the application cost is quite low.
Description
Technical field
The present invention relates to (the Wavelength Division and Multiplexing based on WDM, wavelength division multiplexing) the EPON light access technology field of technology, be specifically related to a kind of open network framework and method for transmitting signals based on wavelength-division PON system.
Background technology
Optical Access Network is the pith in Networks of Fiber Communications, and along with the progress of light communication, China has disposed a large amount of optical access device (such as PON equipment, terminal OLT device, ODN equipment, ONU equipment etc.); Because the whole PON network architecture is closure, the business of therefore carrying in PON network is single.At present, most of PON networks generally carry fixed network ethernet signal, seldom carry movable signal; Movable signal is generally carrying medium with BBU (Building Baseband Unit, indoor baseband processing unit)-RRU (Remote Radio Unit, far-end RF module), repeater etc. in access section.Generally between single BBU and single RRU adopt point-to-point optical fiber to be connected, in BBU and a fairly large number of situation of RRU, the required optical fiber of BBU and RRU signal transmission is more, and then has wasted a large amount of fiber resources.
Meanwhile, along with communication service development, there is following defect in the network architecture of sealing while use:
(1) for having the operator of fixed network equipment, operator is if desired used movable signal, need to increase the load bearing equipment of movable signal and dispose new network and carry the movable signal newly increasing, and then make equipment supplier need to develop new equipment to support new network, not only increase the construction cost of operator and equipment supplier's development cost, and can cause the huge waste of equipment.
(2) class of business of carrying in existing network is single, and existing equipment and the network architecture are difficult to increase flexibly new business according to the demand of business, is not easy to people and uses.
(3) current existing fixed network and mobile network adopt respectively separately independently Access Network facility, it is the infrastructure (for example ODN) of the Access Network of 30～40 years that fixed network and mobile network all need to adopt useful life, adopt respectively the infrastructure of 2 cover Access Networks to use fixed network and mobile network not only to waste a large amount of resources, reduced network resource utilization, and maintenance cost is higher.
Summary of the invention
For the defect existing in prior art, the object of the present invention is to provide a kind of open network framework and method for transmitting signals based on wavelength-division PON system, can, by the same light access of comprehensive multiple to mobile service and fixed network services etc. different business access infrastructure, complete uplink signal transmissions and the downstream signal transmission of multiple different business; Not only service accessibility is stronger, and the scope of application is more extensive, and can realize resource-sharing, reduces the wasting of resources, and use cost is lower.
For reaching above object, the technical scheme that the present invention takes is: a kind of open network framework based on wavelength-division PON system, open optical line terminal equipment OOLT, Optical Distribution Network ODN, some light far-end unit ORU equipment that provides the business of different business that equipment, some carrying different business are provided are provided, business provides equipment to be connected with OOLT, and OOLT is connected with every ORU equipment respectively by ODN;
Described OOLT comprises the business side optical module of control unit, service selection unit, light transmitting-receiving array element, clock unit and some carrying different business; Control unit is connected with service selection unit, light transmitting-receiving array element, clock unit respectively; Each business side optical module with one with it business corresponding to business provide equipment to be connected; Service selection unit is provided with the business datum passage of some carrying different business, and each business side optical module is connected with light transmitting-receiving array element by the data channel corresponding with its business;
Described ODN comprises trunk optical fiber, periodic array waveguide grating AWG and some branch optical fibers; Light transmitting-receiving array element is connected with AWG by trunk optical fiber; AWG is connected with the optical module of all ORU equipment respectively by branch optical fiber, and 1 branch optical fiber connects 1 ORU equipment;
On the basis of technique scheme, described some business that different business is provided provide equipment to comprise at least one in Ethernet ETH switch, repeater proximal device and indoor baseband processing unit BBU.
On the basis of technique scheme, the ORU equipment of some carrying different business comprises at least one in optical network unit ONU, repeater far-end unit and far-end RF module RRU.
On the basis of technique scheme, described light transmitting-receiving array element comprises that optical receiver array, demodulation multiplexer, light send array, multiplexer and filter, service selection unit sends array with optical receiver array, light respectively and is connected, optical receiver array is connected with filter by demodulation multiplexer, light sends array and is connected with filter by multiplexer, and filter is connected with AWG.
For the method for transmitting signals based on wavelength-division PON system of above-mentioned open network framework, comprise the following steps:
A, determine the flow direction of signal, if business side optical module is received the light signal that the business of corresponding business provides equipment to send with it, the flow direction of current demand signal is down direction, forwards step B to; If ORU equipment is received the data from user, the flow direction of current demand signal is up direction, forwards step D to;
B, business side optical module become the signal of telecommunication by light signal through opto-electronic conversion, and control unit is determined the data channel of service selection unit according to current electrical signal; Business side optical module is sent to light transmitting-receiving array element by current electrical signal by the data channel after determining;
C, light transmitting-receiving array element convert current electrical signal to light signal through electric light, and current light signal is carried out, after wavelength multiplexing, exporting AWG to by trunk optical fiber; AWG carries out after wavelength (de) multiplexing current light signal, exports the ORU equipment corresponding with the business of current business sidelight module to by branch optical fiber, completes the transmission of downstream signal, finishes;
D, ORU equipment receive after the data from user, the optical module of ORU equipment is converted to light signal by current data through electric light, ORU equipment is by the branch optical fiber corresponding with the operation wavelength of current light signal, export current light signal to AWG, AWG carries out after wavelength multiplexing current light signal, transfers to light transmitting-receiving array element by trunk optical fiber;
E, light transmitting-receiving array element carry out wavelength (de) multiplexing and become the signal of telecommunication through opto-electronic conversion current light signal, and control unit and clock unit are determined the data channel of service selection unit according to current electrical signal; Light transmitting-receiving array element by current electrical signal by the data channel after determining, transfer to the business side optical module corresponding with current electrical signal business, this business side optical module by current electrical signal after electric light converts light signal to, export the business corresponding with current light signal business to equipment is provided, complete the transmission of upward signal, finish.
On the basis of technique scheme, AWG described in step C carries out after wavelength (de) multiplexing current light signal, export the ORU equipment corresponding with the business of current business sidelight module to by branch optical fiber, comprise the following steps: AWG to the wavelength branch optical fiber corresponding with it, exports current light signal partial wave to the ORU equipment corresponding with the business of current business sidelight module by this branch optical fiber.
On the basis of technique scheme, AWG described in step D carries out after wavelength multiplexing current light signal, transfer to light transmitting-receiving array element by trunk optical fiber, comprise the following steps: AWG to the operation wavelength of the current light signal operating wave ankylose ripple different from other after, transfer to light transmitting-receiving array element by trunk optical fiber.
On the basis of technique scheme, it is characterized in that: some business that different business is provided provide equipment to comprise ETH switch and BBU, the business side optical module of some carrying different business comprises 1.25G ETH optical module and 3G optical module, and the ORU unit of some carrying different business comprises ONU and RRU;
ETH switch is connected with 1.25G ETH optical module, and 1.25G ETH optical module is connected with service selection unit by ETH interface; Service selection unit is provided with the data channel Ch8 of carrying 1.25G ETH business, and Ch8 is connected with ONU by 1 branch optical fiber;
BBU is connected with 3G optical module, and 3G optical module is connected with service selection unit by common public radio interface CPRI interface; Service selection unit is provided with the data channel Ch1 of carrying 3G business; Ch1 is connected with RRU by 1 branch optical fiber.
On the basis of technique scheme, need to transmit ethernet signal time, the described method for transmitting signals based on wavelength-division PON system comprises the following steps:
Determine the flow direction of ethernet signal:
If 1.25G ETH optical module is received the output signal of ETH switch, the flow direction of current ethernet signal is down direction; 1.25G ETH optical module is the signal of telecommunication by current ethernet signal through opto-electronic conversion; 1.25G ETH optical module exports current electrical signal to light transmitting-receiving array element by data channel Ch8; The corresponding operation wavelength of data channel Ch8 is λ d/u8, and wherein d represents bearing downlink signal, and u represents to carry upward signal;
Light transmitting-receiving array element converts current electrical signal to Ethernet light signal through electric light, and the light signal of current light signal and other different operating wavelength is carried out, after wavelength multiplexing, exporting AWG to by trunk optical fiber; The multi-wavelength Ethernet light signal of AWG after to wavelength multiplexing carries out wavelength (de) multiplexing and is the branch optical fiber of λ d8 the receiving terminal that exports ONU to by operation wavelength, completes the transmission of downlink Ethernet signal;
If ONU receives the data from user, the flow direction of current ethernet signal is up direction; The optical module of ONU is converted to light signal by current data through electric light, and its output wavelength is λ u8; ORU equipment is the branch optical fiber of λ u8 by operation wavelength, exports current light signal to AWG; AWG carries out after wavelength multiplexing the output wavelength of current light signal and other ORU equipment, the light transmitting-receiving array element exporting to by trunk optical fiber;
The light signal of light transmitting-receiving array element after to wavelength multiplexing carries out wavelength (de) multiplexing and opto-electronic conversion is the signal of telecommunication; Light transmitting-receiving array element exports current electrical signal to 1.25G ETH optical module by data channel Ch8, and 1.25G ETH optical module is converted to current electrical signal light signal and exports ETH switch to through electric light, completes the transmission of up ethernet signal.
On the basis of technique scheme, need to transmit 3G movable signal time, the described method for transmitting signals based on wavelength-division PON system comprises the following steps:
Determine the flow direction of 3G movable signal:
If 3G optical module is received the output signal of BBU, the flow direction of current 3G movable signal is down direction; 3G optical module is the signal of telecommunication by current 3G movable signal through opto-electronic conversion; 3G optical module exports current electrical signal to light transmitting-receiving array element by data channel Ch1, and the corresponding wavelength of data channel Ch1 is λ d/u1;
Light transmitting-receiving array element after electric light converts light signal to, is undertaken current electrical signal after wavelength multiplexing, to export AWG to by trunk optical fiber by light signals different from other operation wavelengths current light signal; The light signal after wavelength multiplexing is carried out wavelength (de) multiplexing by AWG and the branch optical fiber that is λ d1 by operation wavelength exports the receiving terminal of RRU to, completes the transmission of descending 3G movable signal;
If RRU receives the data from user, the flow direction of current 3G movable signal is up direction; The optical module of RRU is converted to light signal by current data through electric light, and its output wavelength is λ u1, and ORU equipment is the branch optical fiber of λ u1 by operation wavelength, exports current light signal to AWG; AWG carries out after wavelength multiplexing the output wavelength of current light signal and other ORU equipment, exports light transmitting-receiving array element to by trunk optical fiber.
The light signal of light transmitting-receiving array element after to wavelength multiplexing carries out wavelength (de) multiplexing and opto-electronic conversion is the signal of telecommunication; Light transmitting-receiving array element exports current electrical signal to 3G optical module by data channel Ch1, and 3G optical module is converted to current electrical signal light signal and exports BBU to through electric light, completes the transmission of up 3G movable signal.
Compared with prior art, the invention has the advantages that:
(1) network architecture of the present invention comprises service selection unit, when the network architecture is used, do not need to change OOLT physical hardware, service selection unit can increase corresponding business according to service needed, selects corresponding optical module, the configuration data channel corresponding with business, so by the ORU equipment access corresponding with different business to the business branch supporting.Therefore, the network architecture of the present invention has opening, can, by the same light access of comprehensive multiple to mobile service and fixed network services etc. different business access infrastructure, complete uplink signal transmissions and the downstream signal transmission of multiple different business; Not only service accessibility is stronger, and has improved network resource utilization.
(2) network architecture of the present invention, based on WPON system, can be saved trunk optical fiber, has reduced use cost.
(3) when the network architecture of the present invention is used, can access multiple different business, realize multi-service and share, therefore the present invention can be applicable to multiple ORU equipment, utilization rate of equipment and installations not only can be improved, and the development cost of equipment development business overlapping development can be saved.
(4) compare with mobile network appliance with need to safeguard fixed network equipment in prior art simultaneously, the present invention only need safeguard the single network architecture, and maintenance cost is lower; And the physical communication interface of network architecture use standard of the present invention, be convenient to user's (each producer equipment) intercommunication and use.
Brief description of the drawings
Fig. 1 is the structured flowchart of the open network framework based on wavelength-division PON system in the embodiment of the present invention;
Fig. 2 is the structured flowchart of OOLT in the embodiment of the present invention;
Fig. 3 is the structured flowchart of light transmitting-receiving array element in the embodiment of the present invention;
Fig. 4 is the structured flowchart of the open network framework based on wavelength-division PON system in Application Example of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
Shown in Figure 1, in the embodiment of the present invention based on wavelength-division PON (WDM Passive Optical Network, Wavelength division multiplexing-passive fiber optic network) the open network framework of system, comprise OOLT (Open Optical Line Termination, open optical line terminal equipment), ODN (Optical Distribution Network, Optical Distribution Network), some ORU (Optical Remote Unit, light far-end unit) equipment that provides the business of different business that equipment, some carrying different business are provided.Business provides equipment to be connected with OOLT, and OOLT is connected with every ORU equipment respectively by ODN.
Shown in Figure 1, it is ETH (Ethernet, Ethernet) switch, repeater proximal device and BBU (Building Baseband Unit, indoor baseband processing unit) etc. that business provides equipment; In the situation that business side optical module has corresponding business that equipment is provided, all business all can freely access to the network architecture.
Shown in Figure 1, ORU equipment is the ONU (Optical Network Unit, optical network unit) of the types such as RRU (Remote Radio Unit, far-end RF module), repeater far-end unit and model are SFU/MDU etc.; The optical module of ORU equipment has wavelength adaptation function (can output wavelength be tuned to corresponding wavelength output according to the different wave length of ODN branch optical fiber).
Shown in Figure 2, OOLT comprise control unit, service selection unit, light transmitting-receiving array element, clock unit with some for being connected the business side optical module of the first line of a couplet.Control unit has CDR (Clock and Data Recovery, data clock recovers) function, and control unit is connected with service selection unit, light transmitting-receiving array element, clock unit respectively.In OOLT, the business of each business side optical module carrying is all not identical, each business side optical module with one with it business corresponding to business provide equipment to be connected; Service selection unit is provided with the business datum passage of some carrying different business, and each business side optical module is connected with light transmitting-receiving array element by the data channel corresponding with its business.
ODN comprises trunk optical fiber, AWG (periodically array waveguide grating) and some branch optical fibers, light transmitting-receiving array element is connected with AWG by trunk optical fiber, AWG is connected with the optical module of all ORU equipment respectively by branch optical fiber, and 1 branch optical fiber connects 1 ORU equipment; Branch optical fiber can allow multiple different wave lengths to work simultaneously.
Shown in Figure 3, light transmitting-receiving array element comprises that optical receiver array, demodulation multiplexer, light send array, multiplexer and filter, service selection unit sends array with optical receiver array, light respectively and is connected, optical receiver array is connected with filter by demodulation multiplexer, light sends array and is connected with filter by multiplexer, and filter is connected with the AWG of ODN.
The method for transmitting signals based on wavelength-division PON system for the above-mentioned network architecture in the embodiment of the present invention, comprises the following steps:
S1: determine the flow direction of signal, if business side optical module is received the light signal that the business of corresponding business provides equipment to send with it, the flow direction of current demand signal is down direction, forwards step S2 to; If ORU equipment is received the data from user, the flow direction of current demand signal is up direction, forwards step S4 to.
S2: business side optical module becomes the signal of telecommunication by light signal through opto-electronic conversion, control unit is determined the data channel of service selection unit according to current electrical signal, control unit control clock unit is current data passage configuration reference clock; Business side optical module is sent to light transmitting-receiving array element by current electrical signal by the data channel after determining.
S3: light transmitting-receiving array element converts current electrical signal to light signal through electric light, current light signal is carried out after wavelength multiplexing, export AWG to by trunk optical fiber, AWG carries out after wavelength (de) multiplexing (by current light signal partial wave to the wavelength branch optical fiber corresponding with it) to current light signal, export the ORU equipment corresponding with the business of current business sidelight module to by branch optical fiber, complete the transmission of downstream signal, finish.
S4:ORU equipment receives after the data from user, the optical module of ORU equipment is converted to light signal by current data through electric light, ORU equipment is by the branch optical fiber corresponding with the operation wavelength of current light signal, export current light signal to AWG, AWG carries out after wavelength multiplexing the output wave ankylose ripple of other ORU equipment (with) to current light signal, transfers to light transmitting-receiving array element by trunk optical fiber.
S5: light transmitting-receiving array element carries out wavelength (de) multiplexing and becomes the signal of telecommunication through opto-electronic conversion current light signal, and control unit and clock unit are determined the data channel of service selection unit according to current electrical signal.Light transmitting-receiving array element by current electrical signal by the data channel after determining, transfer to the business side optical module corresponding with current electrical signal business, this business side optical module by current electrical signal after electric light converts light signal to, export the business corresponding with current light signal business to equipment is provided, complete the transmission of upward signal, finish.
The operation principle of the method for transmitting signals based on wavelength-division PON system in the embodiment of the present invention is as follows:
Control unit has been mainly used to the management control function of whole OOLT equipment, comprising the different data channel of different service selection, and configures the function such as management control of the output of corresponding clock and optical module according to the business of passage.
While determining the data channel of service selection unit, clock unit provides clock for service selection unit, due to different service rate differences, required precision difference to clock, therefore clock unit can being configured to different data channel corresponding reference clock output is provided according to different business.
Receiving terminal and the transmitting terminal of light transmitting-receiving array element can be worked the in the situation that of identical wavelength or different wave length.When light transmitting-receiving array element transmits the signal of down direction, by changing into after light signal from the signal of telecommunication of service selection unit, be sent to ODN; When light transmitting-receiving array element transmits the signal of up direction, will convert to after the signal of telecommunication from the light signal of ODN, be sent to the corresponding data passage of service selection unit.Up operation wavelength and descending operation wavelength can be identical, also can be different.The technology that up operation wavelength and descending operation wavelength are adopted by WPON system determines; If WPON system adopts Wavelength reuse mode, up operation wavelength is identical with descending operation wavelength; If WPON system adopts tunable laser mode, up operation wavelength and descending operation wavelength are generally different.
Below by an Application Example, open network framework and the signal transmission method thereof based on wavelength-division PON system of the present invention is specifically described.
Shown in Figure 4, the open network framework in this application embodiment is based on wavelength-division PON system; Wavelength-division PON system contains 8 wavelength pair, wherein up 8 wavelength, descending 8 wavelength.Up operation wavelength is different with descending operation wavelength, and up operation wavelength is C-band, and descending operation wavelength is L-band, and then realizes single fiber bi-directional transmission.The business of this application embodiment transmission is the Ethernet service of 1.25Gb/s speed and the mobile service of 3G speed.
The open network framework based on wavelength-division PON system in this application embodiment comprises, OOLT, ODN, ORU equipment and business that some business are different provide equipment.OOLT comprises control unit, service selection unit, 8 road light transmitting-receiving array elements, the clock unit business side optical module different with some business.
Service selection unit comprises supports multi-service and 16 × 16 cross chips with CDR function, and it comprises 16 ports: port one, port 2, port 3, port 4, port 5, port 6, port 7, port 8, port 9, port one 0, port one 1, port one 2, port one 3, port one 4, port one 5, port one 6; Wherein port one～port 8 connects respectively a business optical module, and port 9～port one 6 is all connected with 8 road light transmitting-receiving array elements.
Clock unit comprises clock selector, 49.152MMhz crystal oscillator and 125Mhz crystal oscillator, and 49.152MMhz crystal oscillator is all connected with service selection unit by clock selector with 125Mhz crystal oscillator.
Business provides equipment to comprise ETH switch and BBU, and business side optical module comprises 1.25G ETH optical module and 3G optical module, and ORU unit comprises ONU and RRU.The optical module that ONU is connected with AWG, the optical module that RRU is connected with AWG all have the automatic adaptive functions of wavelength.
ETH switch is connected with 1.25G ETH optical module, and 1.25G ETH optical module is connected with port one by ETH interface; Port one and port one 6 form the data channel Ch8 of carrying 1.25G ETH business, and Ch8 is connected with ONU by 1 branch optical fiber.
BBU is connected with 3G optical module, and 3G optical module is connected with port 8 by CPRI interface (common public radio interface); Port 8 forms with port 9 the data channel Ch1 that carries 3G business, and Ch1 is connected with RRU by 1 branch optical fiber.
ODN comprises trunk optical fiber, AWG and branch optical fiber, and 8 road light transmitting-receiving array elements are connected with AWG by trunk optical fiber, and AWG is connected with ONU, RRU by 2 branch optical fibers respectively; Every branch optical fiber all allows the wavelength of a L-band and the wavelength of a C-band to work simultaneously, has realized the transmission of single fiber bi-directional.
The method of the transmission of the signal based on the wavelength-division PON system ethernet signal in this application embodiment comprises the following steps:
Determine the flow direction of ethernet signal:
If 1.25G ETH optical module is received the output signal of ETH switch, the flow direction of current ethernet signal is down direction.1.25G ETH optical module is the signal of telecommunication by current ethernet signal through opto-electronic conversion; Control unit control clock unit is the clock of data channel Ch8 configuration 125Mhz, 1.25G ETH optical module (is inputted current electrical signal by data channel Ch8 from port one, export from port one 6) export 8 road light transmitting-receiving array elements to, the corresponding wavelength of data channel Ch8 is λ d/u8 (d represents bearing downlink signal, and u represents to carry upward signal).
8 road light transmitting-receiving array elements by current electrical signal after electric light converts Ethernet light signal to, be operated in the branch that wavelength is λ d8, the light signal of λ d8 and other different operating wavelength (λ d1～λ d7) carries out after wavelength multiplexing, export AWG to by trunk optical fiber, the multi-wavelength Ethernet light signal of AWG after to wavelength multiplexing carries out wavelength (de) multiplexing (being partial wave), light signal after wavelength (de) multiplexing is operated in branch optical fiber separately, the light signal of Ch8 exports the receiving terminal of ONU to by the branch optical fiber of λ d8, complete the transmission of downlink Ethernet signal.
If ONU receives the data from user, the flow direction of current ethernet signal is up direction.The optical module of ONU is converted to light signal by current data through electric light, and its output wavelength is λ u8.ORU equipment is the branch optical fiber of λ u8 by operation wavelength, exports current light signal to AWG; AWG carries out (being that wavelength closes ripple) after wavelength multiplexing to the output wavelength of current light signal and other ORU equipment, the 8 road light transmitting-receiving array elements that export to by trunk optical fiber.
The light signal of 8 road light transmitting-receiving array elements after to wavelength multiplexing carries out wavelength (de) multiplexing (wavelength divided) and opto-electronic conversion is the signal of telecommunication; 8 road light transmitting-receiving array elements (are inputted current electrical signal by data channel Ch8 from port one 6, from port one output) export 1.25GETH optical module to, 1.25G ETH optical module is converted to current electrical signal light signal and exports ETH switch to through electric light, completes the transmission of up ethernet signal.
The method of the transmission of the signal based on the wavelength-division PON system 3G movable signal signal in this application embodiment comprises the following steps:
Determine the flow direction of 3G movable signal:
If 3G optical module is received the output signal of BBU, the flow direction of current 3G movable signal is down direction.3G optical module is the signal of telecommunication by current 3G movable signal through opto-electronic conversion; Control unit control clock unit is the clock of data channel Ch1 configuration 49.125Mhz (or having the frequency of multiple relation with 3G speed), 3G optical module (is inputted current electrical signal by data channel Ch1 from port 8, export from port 9) export 8 road light transmitting-receiving array elements to, the corresponding wavelength of data channel Ch1 is λ d/u1.
8 road light transmitting-receiving array elements by current electrical signal after electric light converts light signal to, operation wavelength is λ d1, the light signal of λ d1 and other different operating wavelength carries out after wavelength multiplexing, the receiving terminal that is exported to the branch optical fiber that the light signal after wavelength multiplexing is carried out wavelength (de) multiplexing by AWG, AWG and be λ d1 by operation wavelength and exported to RRU by trunk optical fiber, completes the transmission of descending 3G movable signal.
If RRU receives the data from user, the flow direction of current 3G movable signal is up direction.The optical module of RRU is converted to light signal by current data through electric light, and its output wavelength is λ u1.ORU equipment is the branch optical fiber of λ u1 by operation wavelength, exports current light signal to AWG.AWG carries out (being that wavelength closes ripple) after wavelength multiplexing to the output wavelength of current light signal and other ORU equipment, exports 8 road light transmitting-receiving array elements to by trunk optical fiber.
The light signal of 8 road light transmitting-receiving array elements after to wavelength multiplexing carries out wavelength (de) multiplexing and opto-electronic conversion is the signal of telecommunication; 8 road light transmitting-receiving array elements (are inputted current electrical signal by data channel Ch1 from port 9, export from port 8) export 3G optical module to, 3G optical module is converted to current electrical signal light signal and exports BBU to through electric light, completes the transmission of up 3G movable signal.
The present invention is not limited to above-mentioned execution mode, for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvements and modifications, within these improvements and modifications are also considered as protection scope of the present invention.The content not being described in detail in this specification belongs to the known prior art of professional and technical personnel in the field.
Claims (10)
1. the open network framework based on wavelength-division PON system, open optical line terminal equipment OOLT, Optical Distribution Network ODN, some light far-end unit ORU equipment that provides the business of different business that equipment, some carrying different business are provided are provided, business provides equipment to be connected with OOLT, and OOLT is connected with every ORU equipment respectively by ODN; It is characterized in that:
Described OOLT comprises the business side optical module of control unit, service selection unit, light transmitting-receiving array element, clock unit and some carrying different business; Control unit is connected with service selection unit, light transmitting-receiving array element, clock unit respectively; Each business side optical module with one with it business corresponding to business provide equipment to be connected; Service selection unit is provided with the business datum passage of some carrying different business, and each business side optical module is connected with light transmitting-receiving array element by the data channel corresponding with its business;
Described ODN comprises trunk optical fiber, periodic array waveguide grating AWG and some branch optical fibers; Light transmitting-receiving array element is connected with AWG by trunk optical fiber; AWG is connected with the optical module of all ORU equipment respectively by branch optical fiber, and 1 branch optical fiber connects 1 ORU equipment.
2. the open network framework based on wavelength-division PON system as claimed in claim 1, is characterized in that: described some business that different business is provided provide equipment to comprise at least one in Ethernet ETH switch, repeater proximal device and indoor baseband processing unit BBU.
3. the open network framework based on wavelength-division PON system as claimed in claim 2, is characterized in that: the ORU equipment of some carrying different business comprises at least one in optical network unit ONU, repeater far-end unit and far-end RF module RRU.
4. the open network framework based on wavelength-division PON system as claimed in claim 1, it is characterized in that: described light transmitting-receiving array element comprises that optical receiver array, demodulation multiplexer, light send array, multiplexer and filter, service selection unit sends array with optical receiver array, light respectively and is connected, optical receiver array is connected with filter by demodulation multiplexer, light sends array and is connected with filter by multiplexer, and filter is connected with AWG.
5. for the method for transmitting signals based on wavelength-division PON system of open network framework described in claim 1 to 4 any one, it is characterized in that, comprise the following steps:
A, determine the flow direction of signal, if business side optical module is received the light signal that the business of corresponding business provides equipment to send with it, the flow direction of current demand signal is down direction, forwards step B to; If ORU equipment is received the data from user, the flow direction of current demand signal is up direction, forwards step D to;
B, business side optical module become the signal of telecommunication by light signal through opto-electronic conversion, and control unit is determined the data channel of service selection unit according to current electrical signal; Business side optical module is sent to light transmitting-receiving array element by current electrical signal by the data channel after determining;
C, light transmitting-receiving array element convert current electrical signal to light signal through electric light, and current light signal is carried out, after wavelength multiplexing, exporting AWG to by trunk optical fiber; AWG carries out after wavelength (de) multiplexing current light signal, exports the ORU equipment corresponding with the business of current business sidelight module to by branch optical fiber, completes the transmission of downstream signal, finishes;
D, ORU equipment receive after the data from user, the optical module of ORU equipment is converted to light signal by current data through electric light, ORU equipment is by the branch optical fiber corresponding with the operation wavelength of current light signal, export current light signal to AWG, AWG carries out after wavelength multiplexing current light signal, transfers to light transmitting-receiving array element by trunk optical fiber;
E, light transmitting-receiving array element carry out wavelength (de) multiplexing and become the signal of telecommunication through opto-electronic conversion current light signal, and control unit and clock unit are determined the data channel of service selection unit according to current electrical signal; Light transmitting-receiving array element by current electrical signal by the data channel after determining, transfer to the business side optical module corresponding with current electrical signal business, this business side optical module by current electrical signal after electric light converts light signal to, export the business corresponding with current light signal business to equipment is provided, complete the transmission of upward signal, finish.
6. the method for transmitting signals based on wavelength-division PON system as claimed in claim 5, it is characterized in that: AWG described in step C carries out after wavelength (de) multiplexing current light signal, export the ORU equipment corresponding with the business of current business sidelight module to by branch optical fiber, comprise the following steps: AWG to the wavelength branch optical fiber corresponding with it, exports current light signal partial wave to the ORU equipment corresponding with the business of current business sidelight module by this branch optical fiber.
7. the method for transmitting signals based on wavelength-division PON system as claimed in claim 5, it is characterized in that: AWG described in step D carries out after wavelength multiplexing current light signal, transfer to light transmitting-receiving array element by trunk optical fiber, comprise the following steps: AWG to the operation wavelength of the current light signal operating wave ankylose ripple different from other after, transfer to light transmitting-receiving array element by trunk optical fiber.
8. the method for transmitting signals based on wavelength-division PON system as claimed in claim 5, it is characterized in that: some business that different business is provided provide equipment to comprise ETH switch and BBU, the business side optical module of some carrying different business comprises 1.25G ETH optical module and 3G optical module, and the ORU unit of some carrying different business comprises ONU and RRU;
ETH switch is connected with 1.25G ETH optical module, and 1.25G ETH optical module is connected with service selection unit by ETH interface; Service selection unit is provided with the data channel Ch8 of carrying 1.25G ETH business, and Ch8 is connected with ONU by 1 branch optical fiber;
BBU is connected with 3G optical module, and 3G optical module is connected with service selection unit by common public radio interface CPRI interface; Service selection unit is provided with the data channel Ch1 of carrying 3G business; Ch1 is connected with RRU by 1 branch optical fiber.
9. the method for transmitting signals based on wavelength-division PON system as claimed in claim 8, is characterized in that: need to transmit ethernet signal time, the described method for transmitting signals based on wavelength-division PON system comprises the following steps:
Determine the flow direction of ethernet signal:
If 1.25G ETH optical module is received the output signal of ETH switch, the flow direction of current ethernet signal is down direction; 1.25G ETH optical module is the signal of telecommunication by current ethernet signal through opto-electronic conversion; 1.25G ETH optical module exports current electrical signal to light transmitting-receiving array element by data channel Ch8; The corresponding operation wavelength of data channel Ch8 is λ d/u8, and wherein d represents bearing downlink signal, and u represents to carry upward signal;
Light transmitting-receiving array element converts current electrical signal to Ethernet light signal through electric light, and the light signal of current light signal and other different operating wavelength is carried out, after wavelength multiplexing, exporting AWG to by trunk optical fiber; The multi-wavelength Ethernet light signal of AWG after to wavelength multiplexing carries out wavelength (de) multiplexing and is the branch optical fiber of λ d8 the receiving terminal that exports ONU to by operation wavelength, completes the transmission of downlink Ethernet signal;
If ONU receives the data from user, the flow direction of current ethernet signal is up direction; The optical module of ONU is converted to light signal by current data through electric light, and its output wavelength is λ u8; ORU equipment is the branch optical fiber of λ u8 by operation wavelength, exports current light signal to AWG; AWG carries out after wavelength multiplexing the output wavelength of current light signal and other ORU equipment, the light transmitting-receiving array element exporting to by trunk optical fiber;
The light signal of light transmitting-receiving array element after to wavelength multiplexing carries out wavelength (de) multiplexing and opto-electronic conversion is the signal of telecommunication; Light transmitting-receiving array element exports current electrical signal to 1.25G ETH optical module by data channel Ch8, and 1.25G ETH optical module is converted to current electrical signal light signal and exports ETH switch to through electric light, completes the transmission of up ethernet signal.
10. the method for transmitting signals based on wavelength-division PON system as claimed in claim 8, is characterized in that: need to transmit 3G movable signal time, the described method for transmitting signals based on wavelength-division PON system comprises the following steps:
Determine the flow direction of 3G movable signal:
If 3G optical module is received the output signal of BBU, the flow direction of current 3G movable signal is down direction; 3G optical module is the signal of telecommunication by current 3G movable signal through opto-electronic conversion; 3G optical module exports current electrical signal to light transmitting-receiving array element by data channel Ch1, and the corresponding wavelength of data channel Ch1 is λ d/u1;
Light transmitting-receiving array element after electric light converts light signal to, is undertaken current electrical signal after wavelength multiplexing, to export AWG to by trunk optical fiber by light signals different from other operation wavelengths current light signal; The light signal after wavelength multiplexing is carried out wavelength (de) multiplexing by AWG and the branch optical fiber that is λ d1 by operation wavelength exports the receiving terminal of RRU to, completes the transmission of descending 3G movable signal;
If RRU receives the data from user, the flow direction of current 3G movable signal is up direction; The optical module of RRU is converted to light signal by current data through electric light, and its output wavelength is λ u1, and ORU equipment is the branch optical fiber of λ u1 by operation wavelength, exports current light signal to AWG; AWG carries out after wavelength multiplexing the output wavelength of current light signal and other ORU equipment, exports light transmitting-receiving array element to by trunk optical fiber.
The light signal of light transmitting-receiving array element after to wavelength multiplexing carries out wavelength (de) multiplexing and opto-electronic conversion is the signal of telecommunication; Light transmitting-receiving array element exports current electrical signal to 3G optical module by data channel Ch1, and 3G optical module is converted to current electrical signal light signal and exports BBU to through electric light, completes the transmission of up 3G movable signal.
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| CN201410233737.8A CN104023282B (en) | 2014-05-29 | 2014-05-29 | Open network architecture based on wavelength division PON system, and signal transmission method |
| PCT/CN2015/071916 WO2015180508A1 (en) | 2014-05-29 | 2015-01-30 | Wavelength division pon system based open network architecture and signal transmission method |
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| CN201410233737.8A CN104023282B (en) | 2014-05-29 | 2014-05-29 | Open network architecture based on wavelength division PON system, and signal transmission method |
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| CN104023282B (en) | 2017-05-17 |
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