CN102088329A - System and method for realizing broadcasting service transmission for wavelength division multiplex passive optical network - Google Patents
System and method for realizing broadcasting service transmission for wavelength division multiplex passive optical network Download PDFInfo
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Abstract
The invention relates to a system and a method for realizing broadcasting service transmission. In the system, an optical line terminal (OLT) is connected with a remote node (RN) through two single mode fibers; the RN is connected to an optical network unit (ONU) through two profile fibers; the OLT mainly comprises a multi-wavelength light source, a sine wave generator, two optical interferometer filters of different types, three array waveguide grating (AWG), an optical circulator, an optical coupler and a plurality of demodulators; the RN only comprises two AWGs; at the OLT end, transmission of uplink and downlink services and broadcasting services can be realized simultaneously by using one light source; each ONU can receive a broadcasting signal and a downlink point-to-point signal; and the OLT is used for injecting continuous wave (CW) serving as a light source of an uplink signal. A subcarrier technology is used and the structure of a system is changed, so that transmission of the uplink and downlink services and the broadcasting services can be realized simultaneously, and the cost and the performance of the system are balanced.
Description
Technical field
The present invention relates to optical communication field, specifically relate to a kind of Wave division multiplexing passive optical network WDM-PON system and method for realizing broadcast traffic transmissions.
Background technology
China's cable TV Access Network adopts the Hybrid Fiber Coaxial hfc plant substantially at present.But along with the arrival in integration of three networks epoch, break through the Access Network bottleneck and become more and more urgent, have only and break through the bandwidth " bottleneck " that inserts part, transmission when could realize Access Network data, voice and TV signal.The essence of hfc plant is the unidirectional transmission system of simulation, and two-wayization transformation complexity, can not be as following large-scale main access way.To the digital broadcasting service in future,, also be easy to support because of the transparency of Wave division multiplexing passive optical network WDM-PON network itself.WDM-PON realizes virtual point-to-point transmission, can not share information between each user, has natural fail safe.WDM-PON is considered to the best solution of fiber-to-the-home FTTH with its superior characteristic.So how realizing the broadcasting of TV signal in WDM-PON is the key that realizes the Access Network unification of three nets, be the crucial power that WDM-PON can widespread deployment.Wavelength-division multiplex technique has long-range vitality.Along with the device of super quality and competitive price will constantly occur, cost reduces the space and can also strengthen.Therefore, realizing that in WDM-PON broadcasting also is effective and feasible, also is a development trend.
WDM-PON adopts the sign of wavelength as user side ONU, therefore is different from the natural quality of TDM optical network TDM-PON downlink broadcast, and the natural quality of WDM-PON can make the broadcast transmitted of TV signal show complicated slightly.At present, in having the WDM-PON of broadcast capability, all are common methods for broadcast singal distributes a specific sharing wavelength or a wideband light source is provided, but also have various defectives.The present invention has carried out rational layout to the architectural framework of system, and system not only can realize broadcasting service and point-to-point service simultaneously, and system also can reach perfect condition between cost and performance.
Summary of the invention
The objective of the invention is to defective, provide a kind of Wave division multiplexing passive optical network WDM-PON to realize the system and method for the novelty of broadcast traffic transmissions at the prior art existence.In order to achieve the above object, core concept of the present invention is: the optical line terminal OLT place only needs a multi wave length illuminating source, adopt subcarrier multiplex SCM technology by utilizing, light carrier separates with subcarrier and subcarrier between separate the continuous light that non-modulated can be provided respectively for descending, broadcasting and uplink service.By this new method, can come simplied system structure and overcome the existing defective of transmitting broadcast singal for example needs extra light source.
According to the foregoing invention core concept, the present invention adopts following scheme:
A kind of Wave division multiplexing passive optical network is realized the system of broadcasting service, pass through two monomode fiber first monomode fibers and the second monomode fiber remote node of the connection RN by optical line terminal OLT, and distant-end node RN is connected to the optical network unit ONU formation by two profile fibers respectively, it is characterized in that: 1) described optical line terminal OLT is that 1 multiple-wavelength laser directly is connected to first interferometer filter through a Mach-Zehnder modulators MZM, and Mach-Zehnder modulators MZM is driven by 1 sine-wave generator.The two ends of first interferometer filter connect a 1xN array waveguide grating AWG and second interferometer filter respectively, N the output port of the one 1 x N array waveguide grating AWG connects N the first amplitude modulator IM respectively, multiplexing through 1 the one Nx1 array waveguide grating AWG again, N 〉=2, N is a natural number, two ports of second interferometer filter, one of them is connected directly to one second amplitude modulator IM and is connected to two input ports of a coupler with the output of a Nx1 array waveguide grating AWG, and the delivery outlet of coupler connects described first monomode fiber; The another port directly enters first port of an optical circulator, and second port of this circulator is connected to described second monomode fiber, and the 3rd port is connected to one the 21 x N array waveguide grating; 2) distant-end node RN comprises the array waveguide grating AWG of two 1x N---the 21 x N array waveguide grating and the 31 x N array waveguide grating, and the output port of these two AWG connects corresponding ONU respectively; 3) total N optical network unit ONU, each ONU utilizes reflection type semiconductor amplifier RSOA to realize that the ring of light returns and the transmission of upward signal.
A kind of Wave division multiplexing passive optical network WDM-PON realizes the method for broadcast traffic transmissions, adopt said system to carry out broadcast traffic transmissions, it is characterized in that: the multiple-wavelength laser in the optical line terminal OLT is launched N wavelength simultaneously, and the radiofrequency signal modulation that produces through sine-wave generator produces double-side band subcarrier multiplex (DSB-SCM) signal again.After signal enters first interferometer filter, N light carrier of a port output, be used for the downstream signal modulation through N wavelength of the one 1 x N array waveguide grating AWG demultiplexing output then, N double-side band subcarrier of another port output, export N monolateral belt carrier wave respectively through the second interferometer filter two-port, wherein, an output port directly carries out the modulation of broadcast singal through the second amplitude modulator IM, back and the downstream signal after a Nx1 array waveguide grating AWG is multiplexing transfer to first monomode fiber by coupler, and the N of another output port monolateral belt carrier wave directly transfers to second monomode fiber by a circulator.Two monomode fibers are connected to second, third the 1 x N array waveguide grating AWG of distant-end node RN place respectively, the composite signal that N comprises downstream signal and broadcast singal is sent to each optical network unit ONU by the demultiplexing and the routing function of the 21 x N array waveguide grating through profile fiber, and N monolateral belt carrier wave of non-modulated sends to corresponding optical network unit ONU by the demultiplexing and the routing function of the 31 x N array waveguide grating through profile fiber.Optical network unit is at first separated the signal that receives respectively with the downstream signal of broadcast singal and point-to-point by three port filters and is received.For uplink signal transmissions, in optical network unit ONU, adopt reflection type semiconductor amplifier RSOA the unmodulated light source of being injected by profile fiber to be carried out the remodulates of upward signal, and then by profile fiber will from the upward signal of each optical network unit ONU deliver to carry out in the 31 x N array waveguide grating of distant-end node RN multiplexing, upward signal after multiplexing is sent in the receiver in the optical line terminal OLT by second monomode fiber and optical circulator, thereby finishes the reception of upward signal.
The present invention has following conspicuous outstanding substantive distinguishing features and remarkable advantage compared with prior art: 1) can realize the transmission of up-downgoing business and broadcasting service simultaneously by making full use of frequency band that subcarrier multiplex (SCM) technology produces unmodulated SCM signal; 2) system only needs a multi wave length illuminating source, greatly reduces the cost of system like this, also is convenient to wavelength management; 3) light source that is used for up-downgoing and broadcast singal all is the pure continuous light of non-modulated, disturbs for a short time to each other, and system adopts two fine structures, and systematic function improves greatly; 4) RN and ONU place network configuration are simple, and less demanding to device makes network easy to implement, makes system also reach an equilibrium between cost and performance.
Description of drawings
Fig. 1 realizes the system configuration schematic diagram of Wavelength reuse and broadcast capability for one embodiment of the invention card Wave division multiplexing passive optical network;
Fig. 2 is the schematic diagram of Wave division multiplexing passive optical network optical network unit ONU internal structure.
Embodiment
Accompanying drawings the preferred embodiments of the present invention are as follows:
Embodiment one: referring to Fig. 1, this Wave division multiplexing passive optical network WDM-PON realizes that the system of broadcast capability is by 1 optical line terminal OLT (1), by two monomode fibers---first monomode fiber (15) and second monomode fiber (16) be remote node of the connection RN(17 respectively) in second, third 1xN array waveguide grating AWG(19,18), and distant-end node RN(17) connect an optical network unit ONU by two profile fibers (20,21).Described optical line terminal OLT (1) is directly through 1 Mach-Zehnder modulators MZM(3 by 1 multiple-wavelength laser (2)) be connected to 1 first interferometer filter (5), Mach-Zehnder modulators MZM(3) drive by 1 sine-wave generator (4).The two ends of first interferometer filter (5) are connected to 1 the one 1xN array waveguide grating AWG(7 respectively) and one second interferometer filter (6), the one 1xN array waveguide grating AWG(7) N output port connects N the first amplitude modulator IM(8 respectively), again through 1 the one Nx1 array waveguide grating AWG(10) multiplexing, N 〉=2, N is a natural number; Two ports of second interferometer filter (6), one of them is connected directly to one second amplitude modulator IM(9) and with a Nx1 array waveguide grating AWG(10) output be connected to a coupler (11) two input ports, the delivery outlet of coupler (11) connects first monomode fiber (15); First port of an optical circulator (14) is directly passed through in the another port, and (14) second ports of circulator are connected to second monomode fiber (16), the 3rd port is connected to one the 21 x N array waveguide grating (13), and then by receiver (12) received signal.
Embodiment two: this Wave division multiplexing passive optical network is realized the method for broadcast traffic transmissions, adopts said system to carry out the transmission of broadcasting service.Multiple-wavelength laser (2) in the optical line terminal OLT (1) is launched radiofrequency signal modulation N double-side band subcarrier multiplex of output (DSB-SCM) signal that N wavelength produces through sine-wave generator (4) simultaneously.After this signal enters first interferometer filter (5), N light carrier of a port output, then through the 1xN first array waveguide grating AWG(7) demultiplexing, be used for the downstream signal modulation, N double-side band subcarrier of another port output, export N monolateral belt carrier wave respectively through one second interferometer filter (6) two-port again, wherein, an output port is directly by one second amplitude modulator IM(9) finish the modulation of broadcast singal.Broadcast singal after the modulation with through a Nx1 array waveguide grating AWG(10) downstream signal after multiplexing reaches first monomode fiber (15) by coupler (11) coupling and transmits jointly; And another output port N monolateral belt carrier wave directly transfers to second monomode fiber (16) by a circulator (14).Two monomode fibers are connected to distant-end node RN(17 respectively) second, third 1xN array waveguide grating AWG(19,18 of locating), downstream signal that N is compound and broadcast singal are sent to each optical network unit ONU (22) by the demultiplexing and the routing function of the 2nd 1xN array waveguide grating (19) through profile fiber (20), and N monolateral belt carrier wave of non-modulated is sent to optical network unit ONU (22) by the demultiplexing and the routing function of the 3rd 1xN array waveguide grating (18) through profile fiber (21).Optical network unit ONU (22) is at first separated the signal that receives respectively with the downstream signal of broadcast singal and point-to-point by three port filters (24) and is received.
Referring to Fig. 2, for uplink signal transmissions, the unmodulated light source of being injected by profile fiber (21) is carried out the remodulates of upward signal in optical network unit ONU (22), modulator adopts reflection type semiconductor amplifier RSOA(27), not only can modulation signal and amplifying signal.And then the upward signal of each optical network unit ONU (22) is delivered to distant-end node RN(17 by profile fiber (21)) the 3rd 1xN array waveguide grating (18) in carry out multiplexing, upward signal after multiplexing is sent in the receiver (12) in the optical line terminal OLT by second monomode fiber (16) and optical circulator (14), thereby finishes the reception of upward signal.
Claims (3)
1. a Wave division multiplexing passive optical network is realized the system of broadcast traffic transmissions, pass through two monomode fibers---first monomode fiber (15) and second monomode fiber (16) remote node of the connection RN(17 by optical line terminal OLT (1)), and distant-end node RN(17) be connected to optical network unit ONU (22) formation by two profile fibers (20,21) respectively, it is characterized in that:
A. described optical line terminal OLT (1) is that 1 multiple-wavelength laser (2) is directly through 1 Mach-Zehnder modulators MZM(3) be connected to first interferometer filter (5), Mach-Zehnder modulators MZM is driven by 1 sine-wave generator (4); Two output ports of first interferometer filter (5) are connected to one the one 1xN array waveguide grating AWG(7 respectively) and one second interferometer filter (6), the one 1xN array waveguide grating AWG(7) N output port connects N the first amplitude modulator IM(8 respectively), again by a Nx1 array waveguide grating AWG(10) be combined with each other, N 〉=2, N is a natural number; Two output ports of second interferometer filter (6), one of them is connected directly to one second amplitude modulator IM(9) and with a Nx1 array waveguide grating AWG(10) output be connected to a coupler (11), the delivery outlet of coupler (11) connects described first monomode fiber (15); First port of an optical circulator (14) is directly passed through in the another port, and (14) second ports of circulator are connected to described second monomode fiber (16), the 3rd port is connected to one the 21 x N array waveguide grating AWG(13), the 21 x N array waveguide grating AWG(13) N output connect a Photoelectric Detection receiver PD(12 respectively);
B. described distant-end node RN(17) comprise array waveguide grating AWG---the 21 x N array waveguide grating AWG (19) and the 31 x N array waveguide grating AWG (18) of two 1x N, the output port of these two (19,18) AWG connects corresponding ONU(22 respectively);
C. total N optical network unit ONU (22), each ONU(22) utilizing reflection type semiconductor amplifier RSOA(27) the realization ring of light returns and the transmission of upward signal.
2. realize the system of broadcast capability according to claim 1 described Wave division multiplexing passive optical network, it is characterized in that: described distant-end node RN(17) be connected to each optical network unit ONU (22) by two profile fibers (20) (21), each optical network unit ONU (22) connects a downstream signal receiver (25) and a broadcast signal receiver (26) in conjunction with a reflection type semiconductor amplifier RSOA(27 by one three port filter (24)) formation.
3. a Wave division multiplexing passive optical network is realized the method for broadcast traffic transmissions, employing realizes that according to claims 1 described Wave division multiplexing passive optical network the system of broadcasting service carries out broadcast traffic transmissions, it is characterized in that: the multiple-wavelength laser (2) in the optical line terminal OLT (1) is launched N wavelength simultaneously, and the radiofrequency signal modulation that produces through sinusoidal signal generator (4) produces double-side band subcarrier multiplex (DSB-SCM) signal again; Signal enters interferometer filter IL(5) after, N light carrier of a port output, then through the first array waveguide grating AWG(7) demultiplexing exports a plurality of wavelength and is used for downstream signal modulation, N double-side band subcarrier of another port output, connect the second interferometer filter IL(6), two-port is exported N monolateral belt carrier wave respectively, wherein, an output port is directly through the second amplitude modulator IM(9) carry out the modulation of broadcast singal, back and a Nx1 are through array waveguide grating AWG(10) downstream signal after multiplexing transfers to first monomode fiber (15) by coupler (11), and the individual monolateral belt carrier wave of another output port of second interferometer filter (6) N directly transfers to second monomode fiber (16) by a circulator (14); Two monomode fibers are connected to distant-end node RN(17 respectively) second, third 1xN array waveguide grating AWG(19,18 of locating), the composite signal that N comprises downstream signal and broadcast singal is sent to each optical network unit ONU (22) by the demultiplexing and the routing function of the 2nd 1xN array waveguide grating (19) through profile fiber (20), and N monolateral belt carrier wave of non-modulated is injected into corresponding optical network unit ONU (22) by the demultiplexing and the routing function of the 3rd 1xN array waveguide grating (18) through profile fiber (21); Optical network unit ONU is at first separated the signal that receives respectively with the downstream signal of broadcast singal and point-to-point by three port filters (24) and is received; For uplink signal transmissions, optical network unit ONU (22) adopts reflection type semiconductor amplifier RSOA(27) to carry out the remodulates of upward signal by the unmodulated light source of profile fiber (21) injection, and then the upward signal of each optical network unit ONU (22) is delivered to distant-end node RN(17 by profile fiber (21)) the 3rd 1xN array waveguide grating (18) in carry out multiplexing, upward signal after multiplexing is sent in the receiver (12) in the optical line terminal OLT (1) by second monomode fiber (16) and optical circulator (14), thereby finishes the reception of upward signal.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102395059A (en) * | 2011-11-01 | 2012-03-28 | 中兴通讯股份有限公司 | Device and method for transmitting and receiving business data in wavelength division multiplexing PON (passive optical network) |
| CN103199918A (en) * | 2013-04-19 | 2013-07-10 | 上海大学 | System and method using wavelength division multiplexing passive optical network to realize wavelength reuse and protection function |
| CN104125008A (en) * | 2014-07-30 | 2014-10-29 | 中国联合网络通信集团有限公司 | Method and device for protecting distribution fibers |
| CN104320725A (en) * | 2014-04-14 | 2015-01-28 | 上海大学 | Orthogonal frequency division multiplexing passive optical network system based on polarization technique and photoproduction millimeter wave and transmission method thereof |
| CN106488345A (en) * | 2015-08-24 | 2017-03-08 | 中兴通讯股份有限公司 | A kind of data transmission method, device, system and ONU, OLT |
| WO2017193600A1 (en) * | 2016-05-11 | 2017-11-16 | 中天宽带技术有限公司 | Communication apparatus based on ultra-narrow band spectrum segmentation incoherent light source and self-adaptive threshold regulation and control in wdm-pon system |
| CN114172580A (en) * | 2021-12-22 | 2022-03-11 | 欧梯恩智能科技(苏州)有限公司 | Optical sensor network WDM-PON system based on adjustable ONU and signal propagation method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080152345A1 (en) * | 2005-06-03 | 2008-06-26 | Kt Corporation | Wavelength division multiplexing-passive optical network system |
| CN101835070A (en) * | 2010-05-06 | 2010-09-15 | 上海大学 | System and method for realizing wavelength reusing and broadcasting functions of wavelength division multiplexing passive optical network |
| CN101848054A (en) * | 2010-05-06 | 2010-09-29 | 上海大学 | System and method for leading wavelength division multiplexing passive optical network to realize broadcast function with self-healing function |
-
2010
- 2010-12-28 CN CN 201010607568 patent/CN102088329B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080152345A1 (en) * | 2005-06-03 | 2008-06-26 | Kt Corporation | Wavelength division multiplexing-passive optical network system |
| CN101835070A (en) * | 2010-05-06 | 2010-09-15 | 上海大学 | System and method for realizing wavelength reusing and broadcasting functions of wavelength division multiplexing passive optical network |
| CN101848054A (en) * | 2010-05-06 | 2010-09-29 | 上海大学 | System and method for leading wavelength division multiplexing passive optical network to realize broadcast function with self-healing function |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102395059A (en) * | 2011-11-01 | 2012-03-28 | 中兴通讯股份有限公司 | Device and method for transmitting and receiving business data in wavelength division multiplexing PON (passive optical network) |
| CN102395059B (en) * | 2011-11-01 | 2018-08-03 | 南京中兴新软件有限责任公司 | The device and method of business datum is transmitted, received in Wave division multiplexing passive optical network |
| CN103199918A (en) * | 2013-04-19 | 2013-07-10 | 上海大学 | System and method using wavelength division multiplexing passive optical network to realize wavelength reuse and protection function |
| CN104320725A (en) * | 2014-04-14 | 2015-01-28 | 上海大学 | Orthogonal frequency division multiplexing passive optical network system based on polarization technique and photoproduction millimeter wave and transmission method thereof |
| CN104125008A (en) * | 2014-07-30 | 2014-10-29 | 中国联合网络通信集团有限公司 | Method and device for protecting distribution fibers |
| CN106488345A (en) * | 2015-08-24 | 2017-03-08 | 中兴通讯股份有限公司 | A kind of data transmission method, device, system and ONU, OLT |
| WO2017193600A1 (en) * | 2016-05-11 | 2017-11-16 | 中天宽带技术有限公司 | Communication apparatus based on ultra-narrow band spectrum segmentation incoherent light source and self-adaptive threshold regulation and control in wdm-pon system |
| CN114172580A (en) * | 2021-12-22 | 2022-03-11 | 欧梯恩智能科技(苏州)有限公司 | Optical sensor network WDM-PON system based on adjustable ONU and signal propagation method |
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