CN102710326A - Wavelength division multiplexing passive optical network system with remote node protecting function and realization method thereof - Google Patents
Wavelength division multiplexing passive optical network system with remote node protecting function and realization method thereof Download PDFInfo
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- CN102710326A CN102710326A CN2012101792066A CN201210179206A CN102710326A CN 102710326 A CN102710326 A CN 102710326A CN 2012101792066 A CN2012101792066 A CN 2012101792066A CN 201210179206 A CN201210179206 A CN 201210179206A CN 102710326 A CN102710326 A CN 102710326A
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Abstract
The invention relates to a wavelength division multiplexing passive optical network system with a remote node protecting function and a realization method thereof. The wavelength division multiplexing passive optical network system comprises a central office (CO) which is connected with m remote nodes (RN) through two optical fibers to form an annular network; the RNs are connected with an optical network unit (ONU) through a distributed optical fiber; the central office end mainly comprises m*n optical transmitters, two arrayed waveguide gratings, an open-circuit circulator, three closed-circuit circulator, a 1*2 optical switches, a 2*2 optical switches, an optical coupler and m*n optical receivers; and the RNs mainly comprise three 2*2 optical switches, a 1*2 optical switch, a open-circuit circulator, four closed-circuit circulators, two optical couplers, a tunable optical filter, an optical wavelength barrier and a 1*n arrayed waveguide gratings. According to the wavelength division multiplexing passive optical network system disclosed by the invention, the protection for the RN nodes can be effectively realized, network users can be properly increased and the transmission distance is prolonged.
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 implementation method that possesses the distant-end node defencive function.
Background technology
The Wave division multiplexing passive optical network WDM-PON technology bandwidth of can under the situation that does not change physical basis equipment, upgrading; Promote the transmission capacity of network significantly; Realize virtual point-to-point transmission, can not share information between each user, have natural fail safe; In optical access network, gather around and have broad application prospects, be considered to the final selection of the following evolution of FTTx.Less for WDM-PON structural research, a comparatively common protection that also is aimed at the ONU node at present with defencive function.The present invention has carried out rational layout to the architectural framework of system, and the system that makes can make signal can on the loop of a closure, transmit all the time under different fault modes, has possessed extremely strong robustness.
Summary of the invention
The objective of the invention is to defective, a kind of Wave division multiplexing passive optical network (WDM-PON) system and implementation method that possesses the distant-end node defencive function is provided, can effectively in WDM-PON, realize protection the RN node to the prior art existence.
For achieving the above object; Core concept of the present invention is: with optical switch the transmission path of signal is switched at central local side CO place between different mode, arrive between the far-end node RN and change, when feeder line optical fiber breaks down; Seek new path for the signal transmission, realize protection system.Adopt a kind of new structural arrangements mode at the RN place, the structure through this new distant-end node RN adapts to different fault modes.
According to the foregoing invention design, the present invention adopts following scheme:
A kind of WDM passive optical network system that possesses the distant-end node defencive function connects m distant-end node RN by central local side CO through two optical fiber and forms circulus.Each distant-end node RN connects n optical network unit ONU through profile fiber, it is characterized in that:
1) among the described central local side CO; Mxn optical sender is connected to an array waveguide grating AWG1; Be connected to a 1x2 optical switch via an open circuit circulator 1,2 ports again; 3 ports of open circuit circulator are connected to waveguide array grating AWG2, and AWG2 is connected to each receiver (0) by mxn bar optical fiber again.Two outputs of optical switch are connected to a 2x2 optical switch and one first closed circuit circulator 1 port respectively; First closed circuit circulator 2 ports are connected to the 2x2 optical switch; 3 ports are connected to second closed circuit circulator 1 port, and two output ports of 2x2 optical switch are connected to two optical switches of distant-end node RN01 respectively: a 2x2 optical switch and 1x2 optical switch; 2,3 ports of the second closed circuit circulator are connected to 3 ports of the 3rd closed circuit circulator (8) 1 ports and coupler.2 ports of coupler are connected to 3 ports of the 3rd closed circuit circulator, and 2 ports of closed circuit circulator and 3 ports of coupler are connected to two optical switches of distant-end node RNm respectively: 2x2 optical switch and 1x2 optical switch.
2) distant-end node RN comprises that first, second, third 3 2x2 light open the light 1 1x2 optical switch, the 4th～the 74 closed circuit circulator; 1 open circuit circulator; First, second 2 optical couplers, 1 wavelength separator, 1 tunable wavelength filter and a waveguide array grating.Connected mode is following: 2 ports of a 2x2 optical switch, 3 ports, 4 ports are connected to 1x2 optical switch 2 ports respectively, the 2nd 2x2 optical switch 1 port and the 4th closed circuit circulator 1 port.3 ports of 1x2 optical switch are connected to 2 ports of the 4th closed circuit circulator, 2 ports of the 2nd 2x2 optical switch, and 3 ports, 4 ports are connected to 1 port of the 5th closed circuit circulator respectively, 2 ports of next RN node and the 3rd 2x2 optical switch.2 ports of the 4th closed circuit circulator, 3 ports are connected to 1 port of first optical coupler and 1 port of second optical coupler respectively.2 ports of first optical coupler, 3 ports are connected to the input of tunable optical filter and wavelength separator respectively, and the output of tunable optical filter and wavelength separator is connected to 1 port the 5th of open circuit circulator and 3 ports of closed circuit circulator respectively.2 ports of second optical coupler, 3 ports, 4 ports are connected to 2 ports of the 5th closed circuit circulator respectively, 3 ports of 1 port of the 3rd 2x2 optical switch and open circuit circulator.3 ports of the 3rd 2x2 optical switch and 4 ports are connected to 1 port of the 5th closed circuit circulator and 1 port of the 7th closed circuit circulator respectively.2 ports of the 7th closed circuit circulator and 3 ports are connected to 2 ports and the next RN node of the 6th closed circuit circulator respectively.2 ports of open circuit circulator are connected to waveguide array grating AWG, and waveguide array grating AWG connects each ONU.
3) ONU comprises 1 receiver, 1 reflection type semiconductor amplifier RSOA and a power splitter.Two ports of power splitter connect receiver and reflection type semiconductor amplifier respectively.
A kind of Wave division multiplexing passive optical network implementation method that possesses defencive function adopts system according to claim 1 to operate, and it is characterized in that: under normal circumstances; When descending; Nxm wavelength of nxm optical sender emission among the described central local side CO is synthesized in the optical fiber through waveguide array grating AWG1 and transmits, and gets into 1 port of open circuit circulator, got into 1 port of 1x2 optical switch again by its 2 port output; Export by 2 ports again; 1 port from the 2x2 optical switch gets into again, and the output of 3 ports gets into distant-end node RN1 by feeder line optical fiber.Wavelength 01 to mn reaches RNm from RN01 clockwise; In order to express easily; Stipulate that at this there is identical number of wavelengths on the road under each RN place; Each RN place is a road n wavelength down; The residing wave band of RNj is
j
wherein, signal is example with RN2 here after getting into RN; Signal gets into 1 port of 2x2 optical switch; By the output of 4 ports, get into 1 port of the 4th closed circuit circulator, export by 2 ports; Get into 1 port of first coupler; This moment, signal was divided into two-way, and a route 2 ports are derived, and got into the input of tunable optical filter TF; Another route 3 ports are derived, and get into the input of wavelength separator WB.Handle the corresponding wave band
of this RN of output node via tunable filter TF.Export 1 port that signal gets into the open circuit circulator, import waveguide array grating AWG by 2 ports again, give receiver and reflection type semiconductor amplifier RSOA reception from each output port output of waveguide array grating AWG by power splitter at last.Wavelength separator WB has intercepted the signal of current RN node; So it is output as out all downstream signals beyond the current RN wave band of living in; This signal gets into 3 ports of the 5th closed circuit circulator, is derived by 1 port, gets into 2 ports of the 2nd 2x2 optical switch and passes to next RN node from the output of 3 ports; By that analogy, until reaching last RN node.Upward signal is produced by the reflection type semiconductor amplifier; Process waveguide array grating AWG gets into open circuit circulator 2 ports, is got into 4 ports of second coupler again by the output of 3 ports, exports and get into 3 ports of the 4th closed circuit circulator again from 1 port of this coupler; Export from 1 port again; Get into 4 ports of a 2x2 optical switch again, derived by 1 port of this optical switch and transfer to previous RN node, be RN1 here.In RN1, the 2nd 2x2 optical switch receives the upward signal from RN2, is derived and got into 1 port of the 5th closed circuit circulator again by 2 ports of this optical switch; Again from 2 ports output and get into 2 ports of second coupler and export from 1 port; The output signal gets into 3 ports of the 4th closed circuit circulator, derives and get into 4 ports of a 2x2 optical switch again from 1 port, gets into central office side CO from the output of 1 port at last; Return along the former road of the route of downstream signal after getting into central office side; Derive via open circuit circulator 3 ports again, get into waveguide array grating AWG2, export to each corresponding receiver at last.
A kind of Wave division multiplexing passive optical network implementation method that possesses defencive function; It is characterized in that: the system that breaks down of the feeder line optical fiber between RN1 and RN2 gets into protected mode 1; Any variation does not take place in the local side CO of central authorities; In the RN1 node, break down, so the 2nd 2x2 optical switch in the RN1 node switches to parastate by original crossing condition owing to working optical fibre.So downstream signal just gets into from 2 ports of the 2nd 2x2 optical switch, 4 ports come out, and get into 2 ports of the 3rd 2x2 optical switch; And export from 3 ports; Transfer to 1 port of the 6th closed circuit circulator, again from the output of 2 ports, at 2 ports that get into the 7th closed circuit circulator; From the output of 3 ports, get into next RN node again by protection optical fiber.In RN2, owing to working optical fibre breaks down, so 1 port of a 2x2 optical switch can't receive the signal that comes from RN1 in the RN2 node, so a 2x2 optical switch switches to parastate from original crossing condition.1 port of 1x2 optical switch receives the downlink data signal that comes from the RN1 node, and from the output of 2 ports, gets into 2 ports of a 2x2 optical switch, exports from 4 ports again.The transmission path of subsequent signal is identical during with operate as normal.During the signal uplink transmission, former road, edge is through returning.
When between central local side CO and RN1 node fiber failure taking place, system gets into protected mode 2, and the 2x2 optical switch among the central local side CO switches to crossing condition by original parastate at this moment.Downstream signal is just got into by 1 port of this optical switch like this, the output of 4 ports, and by protecting optical fiber to transmit.In RN1, a 2x2 optical switch has original crossing condition to switch to parastate, from the 2 ports entering of this optical switch, and the output of 4 ports, subsequent signal transmission form is identical with operate as normal.Then get final product through returning during uplink signal transmissions according to former road.
As RNk-1 node and RNk (when working optical fibre all breaks down with protection optical fiber between
node; Then system gets into protected mode 3, is example with RN2 and RN3 here.1x2 light opened the light and switched to the 1-3 conducting by original 1-2 conducting in central local side CO this moment, and 2x2 light opens the light and switches to crossing condition by original parastate.Downstream signal gets into via 1 port of 1x2 optical switch, the output of 3 ports.Get into 1 port of the first closed circuit circulator again, and derive, get into 2 ports of 2x2 optical switch again,, get into the RN node by working optical fibre by the output of 3 ports from 2 ports.Subsequent optical signal transmission mode is identical during with operate as normal, until transferring to the malfunctioning node place.Two the RN nodes that have owing to two fine fault points correspondence.Be RN2 here, RN3.Left side with malfunctioning node among this paper is defined as " left side ring ", and the right side is defined as " right ring ".At Zuo Huanzhong, downstream signal transfers to RN2, and the 2nd 2x2 optical switch switches to parastate by original crossing condition in RN2, and the 3rd 2x2 optical switch switches to parastate by original crossing condition, and the 1x2 optical switch switches to the 1-3 conducting by the 1-2 conducting.It is following that signal transmits concrete path: after signal got into node RN 2, according to 2 ports of operate as normal path transmission until 2x2 optical switch (17), this moment, the port of output was 4 ports.Get into 2 ports of the 2nd 2x2 optical switch again,, get into 1 port of the 7th closed circuit circulator, and, then import 3 ports of the 6th closed circuit circulator, export from 2 ports again from the output of 2 ports again from the output of 4 ports.Signal gets into 3 ports of 1x2 optical switch subsequently, and from the output of 1 port, passes to previous RN node, is RN1 here.The uplink signal transmissions mode is then identical with operate as normal.In the RN1 node, the 7th closed circuit circulator receives the downstream signal that comes from the RN2 node, and exports from port one; Transmit 4 ports of the 3rd to 2x2 optical switch, transfer to 3 ports of second optical coupler again by the output of 1 port, export from 1 port again; Downstream signal imports 3 ports of the 4th closed circuit circulator immediately; Get into 4 ports of a 2x2 optical switch at last, and through 1 port with downlink data transmission to central local side CO, because transmission of uplink data is identical during with normal mode of operation; So the data of 1 port of 2x2 optical switch output have upstream data and the RN3 of RN1 and the RN2 downlink data signal to RNm among the remote node RN1.From the 3 ports input of 2x2 optical switch, export immediately by 2 ports for mixed signal, and get into 2 ports of the first closed circuit circulator; Export from 3 ports again; Get into 1 port of the second closed circuit circulator again, and, then import 1 port of the 3rd closed circuit circulator from the output of 2 ports; And, transfer to right ring from the output of 2 ports.First, second 2x2 optical switch in all distant-end nodes all switches to parastate by original crossing condition in the right ring under the situation of protected mode 3; Wherein RN3 is last distant-end node of right ring, and the residing parastate of a 2x2 optical switch in this node is vertical parastate.After mixed signal got into right ring, the one tunnel transferred to the 2x2 optical switch among the right ring end-node RN3.Identical under the transmission means of subsequent downstream signal and the normal mode of operation, until 2 ports of 2x2 optical switch, because optical switch is in parastate; So signal then from the 4 ports output of this optical switch, then gets into 2 ports that the 3rd 2x2 light opens the light, and is exported by 3 ports; Get into 1 port of the 6th closed circuit circulator; From the output of 3 ports, get into 2 ports of the 7th closed circuit circulator more again, export by 3 ports again; Pass to previous RN node, output comprises upward signal and the remaining downstream signal of RN1 and RN2 in the left road in the signal.Uplink signal transmissions mode in the RN3 node is identical with normal mode of operation until transferring to the 2nd 2x2 optical switch; Because this light opens the light and is in parastate; So upward signal is advanced by 4 ports, 3 ports, then a curb Optical Fiber Transmission to central office side CO place.In distant-end node RN4, the 1x2 optical switch is advanced by 1 port, and 2 ports go out, and the transmission of subsequent downstream signal is identical with normal mode of operation.By that analogy, downstream signal transmits down along the RN node one by one, until central local side CO.The transmission of upward signal is identical with normal mode of operation among the RN4, until 4 ports of a 2x2 optical switch, owing to get into protected mode 3, so upward signal export by 2 ports, gets into 2 ports of 1x2 optical switch, and exported by 1 port, transfers to the RN3 node.After getting into the RN3 node, the upward signal of node RN 4 gets into 3 ports of the 7th closed circuit circulator, and is exported by 1 port; At 4 ports that get into the 3rd 2x2 optical switch, and, get into 3 ports of the 4th optical coupler again by the output of 1 port; By the output of 1 port, get into 3 ports of closed circuit circulator then again, export from 1 port again; Final 4 ports that get into the 2x2 optical switch are again by the output of 3 ports, and through the Optical Fiber Transmission of setting out on a journey.By that analogy, the upward signal of all RN nodes of right wing all need converge to the RN3 node, and directly transfers to central office side CO through the optical fiber of setting out on a journey between first, second 2x2 optical switch.
With RNm node that central office side CO links to each other in, the optical fiber of setting out on a journey output be the upward signal of right ring, the output of following road be the upward signal of left side ring.The upward signal of right ring is via the 2 ports input of the 3rd closed circuit circulator, and 3 ports are exported, and gets into 2 ports of coupler.The signal of left side ring gets into 3 ports of coupler; Two paths of signals is coupled into one road signal; Successively through 3 ports, 1 port of 3 ports, 1 port and the first closed circuit circulator of the second closed circuit circulator; Through the 1x2 optical switch, finally 3 ports by the open circuit circulator import array waveguide grating AWG2, by it upward signal are distributed to respective receiver more again.
Compared with prior art, unique advantage of the present invention and striking features are: 1) for the single fiber fault, the optical switch that only need change two correspondences in adjacent two nodes just can be realized the protection of node.2) in extensive optical access network; Be under the great situation of RN number of nodes, when local two fine faults occurring, during like the regional fault that causes because of geological disaster; Two pairs of feeder line optical fiber that link to each other with central local side CO can form a new loop fast, support communication.Through the loop network structural design, make the increase network user number that network can be suitable, extend transmission distance.
Description of drawings
Fig. 1 is for possessing the WDM passive optical network system structural representation of defencive function among the present invention.
Fig. 2 is the structural representation of RN node in the WDM passive optical network system that possesses defencive function among the present invention.
Fig. 3 is for possessing the system configuration sketch map of Wave division multiplexing passive optical network under normal operation of defencive function among the present invention.
Fig. 4 is the RN node structure sketch map under the Wave division multiplexing passive optical network normal operation that possesses defencive function among the present invention.
Fig. 5 is for possessing the system configuration sketch map of Wave division multiplexing passive optical network under single fiber fault mode 1 situation of defencive function among the present invention.
Fig. 6 is for possessing the RN node structure sketch map of Wave division multiplexing passive optical network under single fiber fault mode 1 situation of defencive function among the present invention.
Fig. 7 for the Wave division multiplexing passive optical network that possesses defencive function among the present invention under single fiber fault mode 2 situation
The system configuration sketch map.
Fig. 8 is for possessing the RN node structure sketch map of Wave division multiplexing passive optical network under single fiber fault mode 2 situation of defencive function among the present invention.
Fig. 9 is for possessing the system configuration sketch map of Wave division multiplexing passive optical network under two fine failure conditions of defencive function among the present invention.
Figure 10 is for possessing Wave division multiplexing passive optical network " left road " RN node structure sketch map under the two-wire failure condition of defencive function among the present invention.
Figure 11 is for possessing " right wing " RN node structure sketch map of Wave division multiplexing passive optical network under the two-wire failure condition of defencive function among the present invention.
Embodiment
The preferred embodiments of the present invention combine detailed description of the drawings following:
Embodiment one:
Referring to Fig. 1, originally possess the WDM passive optical network system of distant-end node defencive function, connect m distant-end node RN (13,14) by central local side CO (1) through two optical fiber and form circulus.Each distant-end node RN (13; 14) connect n optical network unit ONU (30) through profile fiber; It is characterized in that: among the described central local side CO (1), mxn optical sender (4) is connected to an array waveguide grating AWG1 (2), is connected to a 1x2 optical switch (9) via an open circuit circulator (5) 1,2 ports again; 3 ports of open circuit circulator (5) are connected to waveguide array grating AWG2 (3), and AWG2 (3) is connected to each receiver (0) by mxn bar optical fiber again.(9) two outputs of 1x2 optical switch are connected to a 2x2 optical switch (10) and one first closed circuit circulator (7) 1 ports respectively; First closed circuit circulator (7) 2 ports are connected to 2x2 optical switch (10); 3 ports are connected to and close No. the second circulator (6) 1 ports, and two output ports of 2x2 optical switch are connected to two optical switches of distant-end node RN01 respectively: a 2x2 optical switch (16) and 1x2 optical switch (19); 2,3 ports of closed circuit circulator (6) are connected to 3 ports of the 3rd closed circuit circulator (8) 1 ports and coupler (15).2 ports of coupler (15) are connected to 3 ports of the 3rd closed circuit circulator (8), and 3 ports of 2 ports of closed circuit circulator (8) and coupler (15) are connected to two optical switches of distant-end node RNm respectively: a 2x2 optical switch (16) and 1x2 optical switch (19).
Comprise first, second, third 3 2x2 light open the light (16,17,18) referring to Fig. 2 distant-end node RN (13,14); 1 1x2 optical switch (19), the 4th～the 74 closed circuit circulator (20,21,22; 23), 1 open circuit circulator (24), 2 optical couplers (25; 26), 1 wavelength separator (28), 1 tunable wavelength filter (27) and a waveguide array grating (29).Connected mode is following: 2 ports of a 2x2 optical switch (16), 3 ports, 4 ports are connected to 1x2 optical switch (19) 2 ports respectively, the 2nd 2x2 optical switch (17) 1 ports and the 4th closed circuit circulator (20) 1 ports.3 ports of 1x2 optical switch (19) are connected to 2 ports of the 4th closed circuit circulator (20); 2 ports of the 2nd 2x2 optical switch (17); 3 ports, 4 ports are connected to 1 port of the 5th closed circuit circulator (21) respectively, 2 ports of next RN node and the 3rd 2x2 optical switch (18).2 ports of the 4th closed circuit circulator (20), 3 ports are connected to 1 port of first optical coupler (25) and 1 port of second optical coupler (26) respectively.2 ports of first optical coupler (25); 3 ports are connected to the input of tunable optical filter (27) and wavelength separator (28) respectively, and the output of tunable optical filter (27) and wavelength separator (28) is connected to 1 port of open circuit circulator (24) and 3 ports of closed circuit circulator (21) respectively.2 ports of optical coupler (26), 3 ports, 4 ports are connected to 2 ports of the 5th closed circuit circulator (21) respectively, 3 ports of 1 port of the 3rd 2x2 optical switch (18) and open circuit circulator (24).3 ports of the 3rd 2x2 optical switch (18) and 4 ports are connected to 1 port and 1 port that closes the No. seven circulator (23) of the 7th closed circuit circulator (22) respectively.2 ports of the 7th closed circuit circulator (23) and 3 ports are connected to 2 ports and the next RN node of the 6th closed circuit circulator (22) respectively.2 ports of open circuit circulator (24) are connected to waveguide array grating AWG (29), and waveguide array grating AWG (29) connects each ONU (30).
Embodiment two:
Referring to Fig. 3, Fig. 4.Originally the Wave division multiplexing passive optical network implementation method that possesses defencive function; It is characterized in that: under normal operation, when descending, nxm the wavelength of nxm optical sender (4) emission among the described central local side CO (1) is synthesized in the optical fiber through waveguide array grating AWG1 (2) and transmits; Get into 1 port of open circuit circulator (5); Got into 1 port of 1x2 optical switch again by its 2 port output, again by the output of 2 ports, 1 port from 2x2 optical switch (10) gets into again; The output of 3 ports gets into distant-end node RN1 by feeder line optical fiber.Wavelength 01 to mn reaches RNm from RN01 clockwise; In order to express easily; Stipulate that at this there is identical number of wavelengths on the road under each RN place; Each RN place is a road n wavelength down; The residing wave band of RNj is
j
wherein, signal is example with RN2 here after getting into RN; Signal gets into 1 port of 2x2 optical switch; By the output of 4 ports, get into 1 port of the 4th closed circuit circulator (20), export by 2 ports; Get into 1 port of first coupler (25); This moment, signal was divided into two-way, and a route 2 ports are derived, and got into the input of tunable optical filter TF (27); Another route 3 ports are derived, and get into the input of wavelength separator WB (28).Handle the corresponding wave band
of this RN of output node via tunable filter TF (27).The output signal gets into 1 port of open circuit circulator (24); Import waveguide array grating AWG (29) by 2 ports again, give receiver (31) and reflection type semiconductor amplifier RSOA (32) reception from each output port output of waveguide array grating AWG (29) by power splitter (33) at last.Wavelength separator WB (28) has intercepted the signal of current RN node; So it is output as out all downstream signals beyond the current RN wave band of living in; This signal gets into 3 ports of the 5th closed circuit circulator (21), is derived by 1 port, gets into 2 ports of the 2nd 2x2 optical switch (17) and passes to next RN node from the output of 3 ports; By that analogy, until reaching last RN node.Upward signal is produced by the reflection type semiconductor amplifier; Process waveguide array grating AWG (29) gets into open circuit circulator (24) 2 ports, is got into 4 ports of second couplers (26) again by the output of 3 ports, exports and get into 3 ports of the 4th closed circuit circulator (20) again from 1 port of this coupler; Export from 1 port again; Get into 4 ports of a 2x2 optical switch (16) again, derived by 1 port of this optical switch and transfer to previous RN node, be RN1 here.In RN1; The 2nd 2x2 optical switch (17) receives the upward signal from RN2; Derive and get into 1 port of the 5th closed circuit circulator (21) again by 2 ports of this optical switch, export and get into 2 ports of second coupler (26) and, export 3 ports that signal gets into the 4th closed circuit circulator (20) from 2 ports again from the output of 1 port; Derive and get into 4 ports of a 2x2 optical switch (16) again from 1 port; Get into central office side CO (1) from the output of 1 port at last, return along the former road of the route of downstream signal after the entering central office side, derive via open circuit circulator (5) 3 ports again; Get into waveguide array grating AWG2 (3), export to each corresponding receiver (0) at last.
Embodiment three
Referring to Fig. 5, Fig. 6.Originally the Wave division multiplexing passive optical network implementation method that possesses defencive function; It is characterized in that: the system that breaks down of the feeder line optical fiber between RN1 and RN2 gets into protected mode 1; Any variation does not take place in the local side CO of central authorities (1); In the RN1 node, break down, so the 2nd 2x2 optical switch (17) in the RN1 node switches to parastate by original crossing condition owing to working optical fibre.So downstream signal just gets into from 2 ports of the 2nd 2x2 optical switch (17), 4 ports come out, and get into 2 ports of the 3rd 2x2 optical switch (18); And export from 3 ports; Transfer to 1 port of the 6th closed circuit circulator (22), again from the output of 2 ports, at 2 ports that get into the 7th closed circuit circulator (23); From the output of 3 ports, get into next RN node again by protection optical fiber.In RN2, owing to working optical fibre breaks down, so 1 port of a 2x2 optical switch (16) can't receive the signal that comes from RN1 in the RN2 node, so a 2x2 optical switch (16) switches to parastate from original crossing condition.1 port of 1x2 optical switch (19) receives the downlink data signal that comes from the RN1 node, and from the output of 2 ports, gets into 2 ports of a 2x2 optical switch (16), exports from 4 ports again.The transmission path of subsequent signal is identical during with operate as normal.During the signal uplink transmission, former road, edge is through returning.
Embodiment four
Referring to Fig. 7, Fig. 8.Originally the Wave division multiplexing passive optical network implementation method that possesses defencive function; It is characterized in that: when between central local side CO (1) and RN1 node fiber failure taking place; System gets into protected mode 2, and the 2x2 optical switch (10) among central local side CO this moment (1) switches to crossing condition by original parastate.Downstream signal is just got into by 1 port of this optical switch like this, the output of 4 ports, and by protecting optical fiber to transmit.In RN1, a 2x2 optical switch (16) has original crossing condition to switch to parastate, from the 2 ports entering of this optical switch, and the output of 4 ports, subsequent signal transmission form is identical with operate as normal.Then get final product through returning during uplink signal transmissions according to former road.
Embodiment five
Referring to Fig. 9, Figure 10, Figure 11.Originally the Wave division multiplexing passive optical network implementation method that possesses defencive function; It is characterized in that: as RNk-1 node and RNk (when working optical fibre all breaks down with protection optical fiber between
node; Then system gets into protected mode 3, is example with RN2 and RN3 here.This moment in central local side CO (1), 1x2 light open the light (9) switch to the 1-3 conducting by original 1-2 conducting, 2x2 light open the light (10) switch to crossing condition by original parastate.Downstream signal gets into via 1 port of 1x2 optical switch (9), the output of 3 ports.Get into 1 port of the first closed circuit circulator (7) again, and derive, get into 2 ports of 2x2 optical switch (10) again,, get into the RN node by working optical fibre by the output of 3 ports from 2 ports.Subsequent optical signal transmission mode is identical during with operate as normal, until transferring to the malfunctioning node place.Two the RN nodes that have owing to two fine fault points correspondence.Be RN2 here, RN3.Left side with malfunctioning node among this paper is defined as " left side ring ", and the right side is defined as " right ring ".At Zuo Huanzhong; Downstream signal transfers to RN2; The 2nd 2x2 optical switch (17) switches to parastate by original crossing condition in RN2, and the 3rd 2x2 optical switch (18) switches to parastate by original crossing condition, and 1x2 optical switch (19) switches to the 1-3 conducting by the 1-2 conducting.It is following that signal transmits concrete path: after signal got into node RN 2, according to 2 ports of operate as normal path transmission until the 2nd 2x2 optical switch (17), this moment, the port of output was 4 ports.Get into 2 ports of the 3rd 2x2 optical switch (18) again,, get into 1 port of the 7th closed circuit circulator (23), and, then import 3 ports of the 6th closed circuit circulator (22), export from 2 ports again from the output of 2 ports again from the output of 4 ports.Signal gets into 3 ports of 1x2 optical switch (19) subsequently, and from the output of 1 port, passes to previous RN node, is RN1 here.The uplink signal transmissions mode is then identical with operate as normal.In the RN1 node; The 7th closed circuit circulator (23) receives the downstream signal that comes from the RN2 node, and from port one output, transfers to 4 ports of the 3rd 2x2 optical switch (18); Transfer to 3 ports of second optical coupler (26) again by the output of 1 port; From the output of 1 port, downstream signal imports 3 ports of the 4th closed circuit circulator (20) immediately, gets into 4 ports of a 2x2 optical switch (16) at last again; And through 1 port with downlink data transmission to central local side CO (1); Because transmission of uplink data is identical during with normal mode of operation, so the data that 1 port of a 2x2 optical switch (16) is exported among the remote node RN1 have upstream data and the RN3 of RN1 and the RN2 downlink data signal to RNm.From the 3 ports input of 2x2 optical switch (10), export immediately by 2 ports for mixed signal, and get into 2 ports of the first closed circuit circulator (7); Export from 3 ports again; Get into 1 port of the second closed circuit circulator (6) again, and, then import 1 port of the 3rd closed circuit circulator (8) from the output of 2 ports; And, transfer to right ring from the output of 2 ports.First, second 2x2 optical switch (16 in all distant-end nodes in the right ring under the situation of protected mode 3; 17) all switch to parastate by original crossing condition; Wherein RN3 is last distant-end node of right ring, and the residing parastate of a 2x2 optical switch (16) in this node is vertical parastate.After mixed signal got into right ring, the one tunnel transferred to the 2x2 optical switch (16) among the right ring end-node RN3.Identical under the transmission means of subsequent downstream signal and the normal mode of operation, until 2 ports of 2x2 optical switch, because optical switch is in parastate; So signal, then gets into open the light 2 ports of (18) of the 3rd 2x2 light then from the output of 4 ports of this optical switch, and export by 3 ports; Get into 1 port of the 6th closed circuit circulator (22); From the output of 3 ports, get into 2 ports of the 7th closed circuit circulator (23) more again, export by 3 ports again; Pass to previous RN node, output comprises upward signal and the remaining downstream signal of RN1 and RN2 in the left road in the signal.Uplink signal transmissions mode in the RN3 node is identical with normal mode of operation until transferring to a 2x2 optical switch (16); Because this light opens the light and is in parastate; So upward signal is advanced by 4 ports, 3 ports, then a curb Optical Fiber Transmission and is located to central office side CO (1).In distant-end node RN4,1x2 optical switch (19) is advanced by 1 port, and 2 ports go out, and the transmission of subsequent downstream signal is identical with normal mode of operation.By that analogy, downstream signal transmits down along the RN node one by one, until central local side CO (1).The transmission of upward signal is identical with normal mode of operation among the RN4, until 4 ports of a 2x2 optical switch (16), owing to get into protected mode 3; So upward signal is exported by 2 ports; Get into 2 ports of 1x2 optical switch (19), and, transfer to the RN3 node by the output of 1 port.After getting into the RN3 node, the upward signal of node RN 4 gets into 3 ports of the 7th closed circuit circulator (23), and is exported by 1 port; At 4 ports that get into the 3rd 2x2 optical switch (18), and, get into 3 ports of optical coupler again by the output of 1 port; By the output of 1 port, get into 3 ports of the 4th closed circuit circulator (20) then again, export from 1 port again; Final 4 ports that get into the 2x2 optical switch are again by the output of 3 ports, and through the Optical Fiber Transmission of setting out on a journey.By that analogy, the upward signal of all RN nodes of right wing all need converge to the RN3 node, and directly transfers to central office side CO (1) through the optical fiber of setting out on a journey between the first, the one 2x2 optical switch (16,17).
With RNm node that central office side CO (1) links to each other in, the optical fiber of setting out on a journey output be the upward signal of right ring, the output of following road be the upward signal of left side ring.The upward signal of right ring is via the 2 ports input of the 3rd closed circuit circulator (8), the output of 3 ports, and 2 ports of entering coupler (15).The signal of left side ring gets into 3 ports of coupler (15); Two paths of signals is coupled into one road signal; Successively through 3 ports, 1 port of 3 ports, 1 port and the first closed circuit circulator (7) of the second closed circuit circulator (6); Through 1x2 optical switch (9), finally 3 ports by open circuit circulator (5) import array waveguide grating AWG2 (3), by it upward signal are distributed to respective receiver (0) more again.
Claims (3)
1. a WDM passive optical network system that possesses the distant-end node defencive function connects m distant-end node RN (13,14) by central local side CO (1) through two optical fiber and forms circulus; Each distant-end node RN (13,14) connects n optical network unit ONU through profile fiber, it is characterized in that:
1) among the described central local side CO (1); Mxn optical sender (4) is connected to an array waveguide grating AWG1 (2); Be connected to a 1x2 optical switch (9) via an open circuit circulator (5) 1,2 ports again; 3 ports of open circuit circulator (5) are connected to waveguide array grating AWG2 (3), and AWG2 (3) is connected to each receiver (0) by mxn bar optical fiber again; (9) two outputs of 1x2 optical switch are connected to a 2x2 optical switch (10) and one first closed circuit circulator (7) 1 ports respectively; First closed circuit circulator (7) 2 ports are connected to 2x2 optical switch (10); 3 ports are connected to second closed circuit circulator (6) 1 ports, and two output ports of 2x2 optical switch are connected to two optical switches (16,19) of distant-end node RN01 respectively: a 2x2 optical switch (16) and 1x2 optical switch (19); 2,3 ports of the second closed circuit circulator (6) are connected to 1 port of the 3rd closed circuit circulator (8) 1 ports and coupler (15); 2 ports of coupler (15) are connected to 3 ports of the 3rd closed circuit circulator (8), and 3 ports of 2 ports of the 3rd closed circuit circulator 8 and coupler (15) are connected to two optical switches of distant-end node RNm respectively: a 2x2 optical switch (16) and 1x2 optical switch (19);
2) distant-end node RN (13,14) comprises first, second, third 3 2x2 light open the light (16,17,18); 1 1x2 optical switch (19), the 4th～the 74 closed circuit circulator (20,21,22; 23), 1 open circuit circulator (24), first, second 2 optical couplers (25; 26), 1 wavelength separator (28), 1 tunable wavelength filter (27) and a waveguide array grating (29); Connected mode is following: 2 ports of a 2x2 optical switch (16), 3 ports, 4 ports are connected to 1x2 optical switch (19) 2 ports respectively, the 2nd 2x2 optical switch (17) 1 ports and the 4th closed circuit circulator (20) 1 ports; 3 ports of 1x2 optical switch (19) are connected to 2 ports of the 4th closed circuit circulator (20); 2 ports of the 2nd 2x2 optical switch (17); 3 ports, 4 ports are connected to 1 port of the 5th closed circuit circulator (21) respectively, 2 ports of next RN node and the 3rd 2x2 optical switch (18); 2 ports of the 4th closed circuit circulator (20), 3 ports are connected to 1 port of first optical coupler (25) and 1 port of second optical coupler (26) respectively; 2 ports of first optical coupler (25); 3 ports are connected to the input of tunable optical filter (27) and wavelength separator (28) respectively, and the output of tunable optical filter (27) and wavelength separator (28) is connected to 1 port of open circuit circulator (24) and 3 ports of the 5th closed circuit circulator (21) respectively; 2 ports of second optical coupler (26), 3 ports, 4 ports are connected to 2 ports of the 5th closed circuit circulator (21), 1 port of the 3rd 2x2 optical switch (18) and 3 ports of open circuit circulator (24) respectively; 3 ports of the 3rd 2x2 optical switch (18) and 4 ports are connected to 1 port of the 6th closed circuit circulator (22) and 1 port of the 7th closed circuit circulator (23) respectively; 2 ports of the 7th closed circuit circulator (23) and 3 ports are connected to 2 ports and the next RN node of the 6th closed circuit circulator (22) respectively; 2 ports of open circuit circulator (24) are connected to waveguide array grating AWG (29), and waveguide array grating AWG (29) connects each ONU (30);
3) ONU (30) comprises 1 receiver (31), 1 a reflection type semiconductor amplifier RSOA (32) and a power splitter (33); Two ports of power splitter (33) connect receiver (31) and reflection type semiconductor amplifier (32) respectively.
2. Wave division multiplexing passive optical network implementation method that possesses the distant-end node defencive function; Adopt the WDM passive optical network system that possesses the distant-end node defencive function according to claim 1 to operate; It is characterized in that: under normal circumstances, when descending, nxm the wavelength of nxm optical sender (4) emission among the described central local side CO (1) is synthesized in the optical fiber through waveguide array grating AWG1 (2) and transmits; Get into 1 port of open circuit circulator (5); Got into 1 port of 1x2 optical switch again by its 2 port output, again by the output of 2 ports, 1 port from 2x2 optical switch (10) gets into again; The output of 3 ports gets into distant-end node RN1 by feeder line optical fiber; Wavelength 01 to mn reaches RNm from RN01 clockwise, in order to express easily, stipulates that at this there is identical number of wavelengths on the road under each RN place, and each RN place is a road n wavelength down, and the residing wave band of RNj is λ
(j-1) 1～λ
(j-1) nWherein 1≤j≤m behind the signal entering RN, is example with RN2 here, and signal gets into 1 port of 2x2 optical switch; By the output of 4 ports, get into 1 port of the 4th closed circuit circulator (20), export by 2 ports; Get into 1 port of first coupler (25), this moment, signal was divided into two-way, and a route 2 ports are derived; Get into the input of tunable optical filter TF (27), another route 3 ports are derived, and get into the input of wavelength separator WB (28); Handle the corresponding wave band λ of this RN of output node via tunable filter TF (27)
11～λ
1nThe output signal gets into 1 port of open circuit circulator (24); Import waveguide array grating AWG (29) by 2 ports again, give receiver (31) and reflection type semiconductor amplifier RSOA (32) reception from each output port output of waveguide array grating AWG (29) by power splitter (33) at last; Wavelength separator WB (28) has intercepted the signal of current RN node; So it is output as out all downstream signals beyond the current RN wave band of living in; This signal gets into 3 ports of closed circuit circulator (21), is derived by 1 port, gets into 2 ports of 2x2 optical switch (17) and passes to next RN node from the output of 3 ports; By that analogy, until reaching last RN node; Upward signal is produced by the reflection type semiconductor amplifier; Process waveguide array grating AWG (29) gets into open circuit circulator (24) 2 ports, is got into 4 ports of second couplers (26) again by the output of 3 ports, exports and get into 3 ports of the 4th closed circuit circulator (20) again from 1 port of this coupler; Export from 1 port again; Get into 4 ports of a 2x2 optical switch (16) again, derived by 1 port of this optical switch and transfer to previous RN node, be RN1 here; In RN1; The 2nd 2x2 optical switch (17) receives the upward signal from RN2; Derive and get into 1 port of the 5th closed circuit circulator (21) again by 2 ports of this optical switch, export and get into 2 ports of second coupler (26) and, export 3 ports that signal gets into the 4th closed circuit circulator (20) from 2 ports again from the output of 1 port; Derive and get into 4 ports of a 2x2 optical switch (16) again from 1 port; Get into central office side CO (1) from the output of 1 port at last, return along the former road of the route of downstream signal after the entering central office side, derive via open circuit circulator (5) 3 ports again; Get into waveguide array grating AWG2 (3), export to each corresponding receiver (0) at last.
3. the Wave division multiplexing passive optical network implementation method that possesses defencive function according to claim 2; It is characterized in that: the system that breaks down of the feeder line optical fiber between RN1 and RN2 gets into protected mode 1; Any variation does not take place in the local side CO of central authorities (1); In the RN1 node, break down, so the 2nd 2x2 optical switch (17) in the RN1 node switches to parastate by original crossing condition owing to working optical fibre;
So downstream signal just gets into from 2 ports of the 2nd 2x2 optical switch (17), 4 ports come out, and get into 2 ports of the 3rd 2x2 optical switch (18); And export from 3 ports; Transfer to 1 port of the 6th closed circuit circulator (22),, close 2 ports of the No. seven circulator (23) in entering again from the output of 2 ports; From the output of 3 ports, get into next RN node again by protection optical fiber; In RN2, owing to working optical fibre breaks down, so 1 port of a 2x2 optical switch (16) can't receive the signal that comes from RN1 in the RN2 node, so a 2x2 optical switch (16) switches to parastate from original crossing condition; 1 port of 1x2 optical switch (19) receives the downlink data signal that comes from the RN1 node, and from the output of 2 ports, gets into 2 ports of a 2x2 optical switch (16), exports from 4 ports again; The transmission path of subsequent signal is identical during with operate as normal; During the signal uplink transmission, former road, edge is through returning;
When between central local side CO (1) and RN1 node fiber failure taking place, system gets into protected mode 2, and the 2x2 optical switch (10) among central local side CO this moment (1) switches to crossing condition by original parastate; Downstream signal is just got into by 1 port of this optical switch like this, the output of 4 ports, and by protecting optical fiber to transmit; In RN1, a 2x2 optical switch (16) has original crossing condition to switch to parastate, from the 2 ports entering of this optical switch, and the output of 4 ports, subsequent signal transmission form is identical with operate as normal; Then get final product through returning during uplink signal transmissions according to former road; When working optical fibre between RNk-1 node and RNk node all breaks down with protection optical fiber; Then system gets into protected mode 3; Here be example with RN2 and RN3: this moment is in central local side CO (1); 1x2 light open the light (9) switch to the 1-3 conducting by original 1-2 conducting, 2x2 light open the light (10) switch to crossing condition by original parastate; Downstream signal gets into via 1 port of 1x2 optical switch (9), the output of 3 ports; Get into 1 port of the first closed circuit circulator (7) again, and derive, get into 2 ports of 2x2 optical switch (10) again,, get into the RN node by working optical fibre by the output of 3 ports from 2 ports; Subsequent optical signal transmission mode is identical during with operate as normal, until transferring to the malfunctioning node place; Two the RN nodes that have owing to two fine fault points correspondence; Be RN2 here, RN3; The left side of malfunctioning node is defined as " left side ring "; The right side is defined as " right ring "; At Zuo Huanzhong, downstream signal transfers to RN2, and the 2nd 2x2 optical switch (17) switches to parastate by original crossing condition in RN2; The 3rd 2x2 optical switch (18) switches to parastate by original crossing condition, and 1x2 optical switch (19) switches to the 1-3 conducting by the 1-2 conducting; It is following that signal transmits concrete path: after signal got into node RN 2, according to 2 ports of operate as normal path transmission until the 2nd 2x2 optical switch (17), this moment, the port of output was 4 ports; Get into 2 ports of the 3rd 2x2 optical switch (18) again,, get into 1 port of the 7th closed circuit circulator (23), and, then import 3 ports of the 6th closed circuit circulator (22), export from 2 ports again from the output of 2 ports again from the output of 4 ports; Signal gets into 3 ports of 1x2 optical switch (19) subsequently, and from the output of 1 port, passes to previous RN node, is RN1 here; The uplink signal transmissions mode is then identical with operate as normal; In the RN1 node; The 7th closed circuit circulator (23) receives the downstream signal that comes from the RN2 node, and from port one output, transfers to 4 ports of the 3rd 2x2 optical switch (18); Transfer to 3 ports of first optical coupler (26) again by the output of 1 port; From the output of 1 port, downstream signal imports 3 ports of the 4th closed circuit circulator (20) immediately, gets into 4 ports of a 2x2 optical switch (16) at last again; And through 1 port with downlink data transmission to central local side CO (1); Because transmission of uplink data is identical during with normal mode of operation, so the data that 1 port of a 2x2 optical switch (16) is exported among the remote node RN1 have upstream data and the RN3 of RN1 and the RN2 downlink data signal to RNm; From the 3 ports input of 2x2 optical switch (10), export immediately by 2 ports for mixed signal, and get into 2 ports of the first closed circuit circulator (7); Export from 3 ports again; Get into 1 port of the second closed circuit circulator (6) again, and, then import 1 port of the 3rd closed circuit circulator (8) from the output of 2 ports; And, transfer to right ring from the output of 2 ports; First, second 2x2 optical switch (16 in all distant-end nodes in the right ring under the situation of protected mode 3; 17) all switch to parastate by original crossing condition; Wherein RN3 is last distant-end node of right ring, and the residing parastate of a 2x2 optical switch (16) in this node is vertical parastate; After mixed signal got into right ring, the one tunnel transferred to the 2x2 optical switch (16) among the right ring end-node RN3; Identical under the transmission means of subsequent downstream signal and the normal mode of operation, until 2 ports of 2x2 optical switch, because optical switch is in parastate; So signal, then gets into open the light 2 ports of (18) of the 3rd 2x2 light then from the output of 4 ports of this optical switch, and export by 3 ports; Get into 1 port of the 6th closed circuit circulator (22); From the output of 3 ports, get into 2 ports of closed circuit circulator (23) more again, export by 3 ports again; Pass to previous RN node, output comprises upward signal and the remaining downstream signal of RN1 and RN2 in the left road in the signal; Uplink signal transmissions mode in the RN3 node is identical with normal mode of operation until transferring to a 2x2 optical switch (16); Because this light opens the light and is in parastate; So upward signal is advanced by 4 ports, 3 ports, then a curb Optical Fiber Transmission and is located to central office side CO (1); In distant-end node RN4,1x2 optical switch (19) is advanced by 1 port, and 2 ports go out, and the transmission of subsequent downstream signal is identical with normal mode of operation; By that analogy, downstream signal transmits down along the RN node one by one, until central local side CO (1); The transmission of upward signal is identical with normal mode of operation among the RN4, until 4 ports of a 2x2 optical switch (16), owing to get into protected mode 3; So upward signal is exported by 2 ports; Get into 2 ports of 1x2 optical switch (19), and, transfer to the RN3 node by the output of 1 port; After getting into the RN3 node, the upward signal of node RN 4 gets into 3 ports of the 7th closed circuit circulator (23), and is exported by 1 port; At 4 ports that get into the 3rd 2x2 optical switch (18), and, get into 3 ports of optical coupler again by the output of 1 port; By the output of 1 port, get into 3 ports of the 4th closed circuit circulator (20) then again, export from 1 port again; Final 4 ports that get into the 2x2 optical switch are again by the output of 3 ports, and through the Optical Fiber Transmission of setting out on a journey; By that analogy, the upward signal of all RN nodes of right wing all need converge to the RN3 node, and directly transfers to central office side CO (1) through the optical fiber of setting out on a journey between first, second 2x2 optical switch; With RNm node that central office side CO (1) links to each other in; What the optical fiber of setting out on a journey was exported is the upward signal of right ring, and what exported on following road is the upward signal that a left side is encircled, and the upward signal of right ring is imported via 2 ports of the 3rd closed circuit circulator (8); The output of 3 ports, and 2 ports of entering coupler (15); The signal of left side ring gets into 3 ports of coupler (15); Two paths of signals is coupled into one road signal; Successively through 3 ports, 1 port of 3 ports, 1 port and the first closed circuit circulator (7) of the second closed circuit circulator (6); Through 1x2 optical switch (9), finally 3 ports by open circuit circulator (5) import array waveguide grating AWG2 (3), by it upward signal are distributed to respective receiver more again.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103983286A (en) * | 2014-05-20 | 2014-08-13 | 天津大学 | Multi-parameter large-capacity optical fiber passive sensing networking system |
| CN104243014A (en) * | 2014-09-24 | 2014-12-24 | 上海大学 | System and scheme for implementing simple optical network unit (ONU) and protection functions of passive optical network |
| CN107615685A (en) * | 2015-05-21 | 2018-01-19 | 日本电信电话株式会社 | User's set and method for optical reception |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002005439A2 (en) * | 2000-07-07 | 2002-01-17 | Sycamore Networks, Inc. | Bi-directional wavelength switched ring optical protection switching wavelength assignment algorithm |
| CN1094007C (en) * | 1995-06-26 | 2002-11-06 | 艾利森电话股份有限公司 | self-healing network |
| CN201608719U (en) * | 2010-04-14 | 2010-10-13 | 东南大学 | Wavelength division multiplexing passive optical network protection switching device |
| CN101895463A (en) * | 2010-04-20 | 2010-11-24 | 上海大学 | System and method for achieving network reconfigurability of mixed WDM (Wavelength Division Multiplexing)/TDM (Time Division Multiplexing) PON (Passive Optical Network) |
-
2012
- 2012-06-04 CN CN201210179206.6A patent/CN102710326B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1094007C (en) * | 1995-06-26 | 2002-11-06 | 艾利森电话股份有限公司 | self-healing network |
| WO2002005439A2 (en) * | 2000-07-07 | 2002-01-17 | Sycamore Networks, Inc. | Bi-directional wavelength switched ring optical protection switching wavelength assignment algorithm |
| CN201608719U (en) * | 2010-04-14 | 2010-10-13 | 东南大学 | Wavelength division multiplexing passive optical network protection switching device |
| CN101895463A (en) * | 2010-04-20 | 2010-11-24 | 上海大学 | System and method for achieving network reconfigurability of mixed WDM (Wavelength Division Multiplexing)/TDM (Time Division Multiplexing) PON (Passive Optical Network) |
Non-Patent Citations (2)
| Title |
|---|
| YANAN CAO等: ""A Novel Architecture of Reconfigurable WDM/TDM-PON"", 《2010 19TH ANNUAL WIRELESS AND OPTICAL COMMUNICATIONS CONFERENCE (WOCC)》, 14 May 2010 (2010-05-14), pages 1 - 4, XP031709434 * |
| YANG ZHOU等: ""Self-healing ring-based WDM-PON"", 《OPTICS COMMUNICATIONS》, vol. 283, no. 9, 1 May 2010 (2010-05-01), pages 1732 - 1736 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103983286A (en) * | 2014-05-20 | 2014-08-13 | 天津大学 | Multi-parameter large-capacity optical fiber passive sensing networking system |
| CN104243014A (en) * | 2014-09-24 | 2014-12-24 | 上海大学 | System and scheme for implementing simple optical network unit (ONU) and protection functions of passive optical network |
| CN104243014B (en) * | 2014-09-24 | 2017-03-15 | 上海大学 | A kind of EPON realizes the system and scheme of simple optical network unit and defencive function |
| CN107615685A (en) * | 2015-05-21 | 2018-01-19 | 日本电信电话株式会社 | User's set and method for optical reception |
| CN107615685B (en) * | 2015-05-21 | 2020-06-19 | 日本电信电话株式会社 | User device and optical reception method |
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