CN103516431A

CN103516431A - Photoelectric light repeater, long-distance box, and processing method thereof for uplink/downlink optical signal

Info

Publication number: CN103516431A
Application number: CN201210213055.1A
Authority: CN
Inventors: 张锡芳; 付志明; 徐继东; 张德智
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2012-06-26
Filing date: 2012-06-26
Publication date: 2014-01-15
Anticipated expiration: 2032-06-26
Also published as: CN103516431B

Abstract

The present invention discloses a photoelectric light repeater, a long-distance box, and a processing method thereof for uplink/downlink optical signal. The processing method mainly comprises the following steps: after coupling an uplink optical signal of each splitter to one path, outputting the coupled signal to the photoelectric light repeater by a 1:N coupler, performing reshaping and reamplification on the uplink optical signal output from the 1:N coupler by the photoelectric light repeater, and outputting to an optical line terminal OLT; amplifying the downlink optical signal and outputting to the 1:N coupler by an optical amplifier; and dividing the downlink optical signal output from the photoelectric light repeater to N paths by the 1:N coupler and outputting to N light splitters which are connected with the 1:N coupler. The photoelectric light repeater and the optical amplifier respectively performs reshaping and reamplification on the uplink/downlink signal and output the shaped/amplified signal, thereby prolonging transmission distance of the optical signal. The insertion loss of the 1:N coupler is smaller, thereby creating possibility of splitting ratio increase in a passive optical network PON. Therefore, the splitting ratio of the PON can be increased on condition that the long-distance box ensures long-distance transmission of the optical signal.

Description

Photoelectricity optical repeater, long apart from box and the processing method to up-downgoing light signal thereof

Technical field

The present invention relates to light access technology field, relate in particular to a kind of photoelectricity optical repeater, long apart from box and the processing method to up-downgoing light signal thereof.

Background technology

Under the overall background of global IT application, broadband access development rapidly.Optical fiber access (Fiber-to-the-x, FTTx) construction mode has significantly reduced the construction cost of broadband access network, and with lower cost, has realized the bandwidth lifting of Access Network, and the propelling of the integration of three networks is again for the development of FTTx has increased powerful power.

Along with the propelling of FTTx networking, operator urgently wishes to reduce FTTx network construction cost and O&M cost, large capacity, few office be the developing direction of Future Access Network.

EPON (Passive Optical Network, PON) technology is a kind of optical fiber access technology of point-to-multipoint.The conventional network of division multiplexing passive optical network sometimes (Time Division Multiplexing PON, TDM-PON) and time-division wavelength-division mixed multiplexing passive optical network (Hybird PON, H-PON).

In TDM-PON, system up-downgoing all adopts single wavelength, and to uplink optical signal, each user uses different time slots to transmit, and to downlink optical signal, adopts the forms of broadcasting to transmit.Fig. 1 is existing TDM-PON structural representation, comprise: optical line terminal (Optical Line Terminal, OLT), optical network unit (Optical Network Unit, ONU), repeater (Mid-Span Extender) and optical splitter (splitter).

Conventionally, an OLT connects a plurality of ONU by a repeater and an optical splitter and forms point-to-multipoint structure, shown in Fig. 1 is that 4 OLT connect 4 optical splitters by 4 repeaters respectively, the structural representation of 4 Optical Distribution Networks (Optical Distribution Network, ODN) that form.

In TDM-PON structural representation shown in Fig. 1, on the one hand, for uplink optical signal, the power of the uplink optical signal of ONU transmitting is stipulated within limits; On the other hand, the Insertion Loss of optical splitter is directly proportional to the splitting ratio of himself, and splitting ratio is larger, Insertion Loss is larger, therefore, this has just limited the transmission range of light signal, realizes large splitting ratio if will guarantee, the transmission range of light signal will shorten, if guarantee, realize the long apart from transmission of light signal, splitting ratio will reduce, in the situation that light splitting is smaller, for the more user of load, need to set a fairly large number of PON port.Yet the PON port number in OLT is limited, want newly-increased PON port, just need to increase OLT newly, utilize the PON port of newly-increased OLT to set up the ODN of a greater number.And newly-increased OLT and the ODN that sets up a greater number will increase networking cost and O&M cost.

In addition, in the TDM-PON structure shown in Fig. 1, the complex structure of repeater, realizes difficulty large.

In H-PON, system adopts the different light wave of wavelength to carry out the transmission of light signal, adopts again time-multiplexed mode to carry out the transmission of light signal below each wavelength.Fig. 2 is the composition structural representation of existing H-PON, comprising: mixed light line terminal (Hybrid OLT, H-OLT), repeater (Mid-Span Extender), mixed optical network unit (Hybrid ONU, H-ONU) and optical splitter.Wherein, H-OLT couples together a plurality of of this locality (now claiming a plurality of described PON ports and a multiplexing demultiplexing device that is connected them jointly to form a H-PON port of H-OLT) by local multiplexing demultiplexing device for receiving and send the PON port of the light signal of different wave length, realization is communicated by letter with repeater.In above-mentioned H-PON, also exist and the similar problem of TDM-PON structure.

In sum, in current passive optical network technique, exist if guarantee to realize the long in the situation of transmission of light signal, the problem that light splitting is smaller.

Summary of the invention

The embodiment of the present invention provides a kind of photoelectricity optical repeater, complicated in order to solve repeater of the prior art, realizes the problem that difficulty is large.

An optical repeater, described photoelectricity optical repeater comprises: optical network unit ONU transceiver and OLT receiver;

Described OLT receiver is exported to ONU transceiver after the uplink optical signal of reception being carried out to opto-electronic conversion and amplifying shaping more again;

Described ONU transceiver, exports after electric light conversion for the uplink electrical signals from OLT receiver is carried out.

Photoelectricity optical repeater in the embodiment of the present invention, consists of ONU transceiver and OLT receiver, because each transceiver function is well defined, therefore, simple in structure, more easily realizes.

The embodiment of the present invention also provides a kind of and has grown apart from box and the processing method to up-downgoing light signal, in order to solve in PON, guarantees the long in the situation of transmission of light signal, the problem that light splitting is smaller.

Apart from a box, described length comprises apart from box: photoelectricity optical repeater, 1:N coupler and image intensifer OA;

OA, exports to 1:N coupler after amplifying for the downlink optical signal to from OLT;

Described 1:N coupler, for the downlink optical signal of OA output is divided into N road, and exports to respectively N the optical splitter being connected with self, and exports to photoelectricity optical repeater after the uplink optical signal of each optical splitter output being connected is coupled as to a road;

Described photoelectricity optical repeater, carries out shaping again and amplifies for the uplink optical signal to from 1:N coupler, and exporting to OLT.

Utilize above-mentioned length apart from box the processing method to uplink optical signal, described method comprises:

1:N coupler, when the uplink optical signal receiving from each coupled optical splitter, is exported to photoelectricity optical repeater after the uplink optical signal of each optical splitter is coupled as to a road;

Photoelectricity optical repeater carries out shaping again and amplifies the uplink optical signal of 1:N coupler output, and exports to OLT.

Utilize above-mentioned length apart from box the processing method to downlink optical signal, described method comprises:

OA, when the downlink optical signal receiving from OLT, amplifies described downlink optical signal and exports to 1:N coupler;

1:N coupler is divided into N road by the downlink optical signal of the output of photoelectricity optical repeater, and exports to respectively N the optical splitter being connected with self.

Apart from a box, described length comprises apart from box: n photoelectricity optical repeater, 1:N coupler, the first multiplexing demultiplexing device, the second multiplexing demultiplexing device and image intensifer OA, and described N is greater than 1 positive integer, and described n is greater than 1 positive integer;

Described OA, exports to 1:N coupler after amplifying for the downlink optical signal to from OLT;

Described 1:N coupler, for the downlink optical signal of OA output is divided into N road, and exports to respectively N the optical splitter being connected with self, and exports to the second multiplexing demultiplexing device after the uplink optical signal of each optical splitter output is coupled as to a road;

Described the second multiplexing demultiplexing device, for the uplink optical signal from 1:N coupler is decomposed into k road uplink optical signal, and export to k photoelectricity optical repeater, wherein, in the uplink optical signal of described k road, the wavelength of light wave that carries every road uplink optical signal is different, and described k is greater than 1 and be less than or equal to the positive integer of n;

Described photoelectricity optical repeater, for carrying out the uplink optical signal from the second multiplexing demultiplexing device shaping again and exporting to the first multiplexing demultiplexing device after amplification again;

Described the first multiplexing demultiplexing device, for the k road uplink optical signal from photoelectricity optical repeater is combined into traveling optical signal on the way, and exports to H-OLT.

1:N coupler, when the uplink optical signal receiving from each coupled optical splitter, is exported to the second multiplexing demultiplexing device after the uplink optical signal of each optical splitter is coupled as to a road;

The second multiplexing demultiplexing device will be decomposed into k road uplink optical signal in the uplink optical signal of 1:N coupler output, and export to respectively k photoelectricity optical repeater, wherein, in the uplink optical signal of described k road, the wavelength of light wave that carries every road uplink optical signal is different, and described k is greater than 1 and be less than or equal to the positive integer of n;

K photoelectricity optical repeater carries out shaping again and after amplification, exports to the first multiplexing demultiplexing device again the uplink optical signal of the second multiplexing demultiplexing device output respectively;

The first multiplexing demultiplexing device is combined into traveling optical signal on the way by the uplink optical signal of k photoelectricity optical repeater output, and exports to H-OLT.

OA, when the downlink optical signal receiving from H-OLT, amplifies this downlink optical signal and exports to 1:N coupler;

1:N coupler is divided into N road by the downlink optical signal of OA output, and exports to respectively N the optical splitter being connected with self.

In the scheme of the embodiment of the present invention, on the one hand, the length being connected with a PON port of OLT is carried out shaping again and amplifies uplink optical signal apart from the photoelectricity optical repeater in box apart from box or the length that is connected with a H-PON port of H-OLT, and by the rear uplink optical signal output that shaping is amplified again again, long image intensifer in box, to downlink optical signal is amplified, has extended the transmission range of light signal; On the other hand, the Insertion Loss of long 1:N coupler in box is less, and the splitting ratio that makes to increase in PON becomes possibility, and therefore, the length in the present invention is apart from box in the situation that the length that guarantees light signal, apart from transmission, has increased the splitting ratio in PON.

Accompanying drawing explanation

Fig. 1 is the composition structural representation of the PON in background technology;

Fig. 2 is the composition structural representation of the H-PON in background technology;

Fig. 3 is the structural representation of the photoelectricity optical repeater in the embodiment of the present invention one;

Fig. 4 is the clock signal schematic diagram of the logical block output in the embodiment of the present invention one;

Fig. 5 is that length in the embodiment of the present invention two is apart from box structural representation;

Fig. 6 is the structural representation that the 1:4 coupler 22 in the embodiment of the present invention two is connected with monomode fiber with multimode fiber;

Fig. 7 is that the length in the embodiment of the present invention one is applied to the structural representation of GPON system apart from box;

Fig. 8 is for the length in the embodiment of the present invention three is apart from box structural representation;

Fig. 9 is that length in the embodiment of the present invention three is apart from box structural representation;

Figure 10 is that length in the embodiment of the present invention three is apart from box structural representation;

Figure 11 is that length in the embodiment of the present invention three is apart from box structural representation;

Figure 12 is the first wave-division multiplexer filter structural representation in the embodiment of the present invention three;

Figure 13 is the second wave-division multiplexer filter structural representation in the embodiment of the present invention three;

Figure 14 is that length in the embodiment of the present invention three is apart from box structural representation;

Figure 15 is that length in the embodiment of the present invention three is apart from box structural representation;

Figure 16 is that length in the embodiment of the present invention four is apart from box structural representation;

Figure 17 is that length in the embodiment of the present invention four is apart from box structural representation;

Figure 18 is that length in the embodiment of the present invention four is apart from box structural representation;

Figure 19 is that length in the embodiment of the present invention four is apart from box structural representation;

Figure 20 is a kind of processing method schematic diagram to uplink optical signal in the embodiment of the present invention five;

Figure 21 is a kind of processing method schematic diagram to downlink optical signal in the embodiment of the present invention six;

Figure 22 is a kind of processing method schematic diagram to uplink optical signal in the embodiment of the present invention seven;

Figure 23 is a kind of processing method schematic diagram to downlink optical signal in the embodiment of the present invention eight.

Embodiment

N in the 1:N coupler of the embodiment of the present invention is greater than 1 positive integer, and the value of N can determine according to the actual requirements, and in the scheme of the embodiment of the present invention, the N of take gets 4 and describes as example.

Below by specific embodiment, describe the solution of the present invention in detail.

Embodiment mono-

As shown in Figure 3, be photoelectricity optical repeater 23 structural representations in the embodiment of the present invention one, described photoelectricity optical repeater 23 comprises: ONU transceiver 31 and OLT receiver 32.

Described OLT receiver 32 is exported to ONU transceiver after the uplink optical signal of reception being carried out to opto-electronic conversion and amplifying shaping more again;

The uplink optical signal that described OLT receiver 32 receives can be from 1:N coupler, and the downlink optical signal obtaining after conversion can be exported to 1:N coupler.

Described ONU transceiver 31, exports after electric light conversion for the uplink electrical signals from OLT receiver is carried out.

Preferably, consider that the ONU transceiver 31 in photoelectricity optical repeater 23 need to close its emission switch when not carrying out the transmitting of uplink optical signal, stop the operation for uplink optical signal, to avoid crosstalking of other light signals, guarantee the normal operation of photoelectricity optical repeater; And OLT receiver 32 is when this receives uplink optical signal, hold reset state in time, so that the uplink optical signal of inputting next time in it is processed, described photoelectricity optical repeater also comprises: logical block 33;

Described OLT receiver 32, also for to logical block 33 output detection signals, described detection signal is that OLT receiver is according to the power of uplink optical signal of input and the output of the length of duration.Described detection signal can be: input (Signal Detect, SD) signal or dropout (Lost of Signal, LOS) signal, and when this detection signal is SD signal, detection signal is effective when OLT receiver receives uplink optical signal, is high level; When this detection signal is LOS signal, detection signal is effective when OLT receiver does not receive uplink optical signal, is low level;

Described logical block 33, for the detection signal receiving, be that SD signal and detection signal are when invalid, indication ONU transceiver 31 and OLT receiver 32 stop carrying out the operation for uplink optical signal, at the detection signal receiving, be SD signal and detection signal when effective, the operation that indication ONU transceiver 31 and OLT receiver 32 are carried out for uplink optical signal; At the detection signal receiving, be that LOS signal and detection signal are when effective, indication ONU transceiver 31 and OLT receiver 32 stop carrying out the operation for uplink optical signal, at the detection signal receiving, be LOS signal and detection signal when invalid, indication ONU transceiver and OLT receiver are carried out the operation for uplink optical signal.

Preferably, for uplink optical signal being done to further processing, make from the signal quality of the uplink optical signal of photoelectricity optical repeater output better, described photoelectricity optical repeater 23 also comprises clock recovery unit 34 and timing unit 35 again;

Described ONU transceiver 31, also exports to clock recovery unit 34 for the downlink electrical signal that the downlink optical signal of reception is carried out obtaining after opto-electronic conversion;

Described clock recovery unit 34 for receiving the downlink electrical signal of ONU transceiver output, and extracts reference clock from this downlink electrical signal, with reference to clock, exports timing unit 35 to again;

Described timing unit again 35, for receiving the uplink electrical signals of OLT 32 receiver outputs and the reference clock of clock recovery unit output, utilize described reference clock to carry out again regularly described uplink electrical signals, and export the uplink electrical signals after regularly again to ONU transceiver 31.

Preferably, described logical block 33, when also effective for the detection signal receiving, indicate again timing unit to reset to local register, or, when the detection signal receiving is invalid, indicate again timing unit to reset to local register, so that again timing unit 35 by the register zero clearing of himself, for the uplink electrical signals receiving next time is carried out regularly again.

Concrete, logical block 33, after receiving the detection signal of OLT receiver output, is exported following clock signal, with the corresponding device in pilot light electric light repeater or unit, carries out the operation to uplink optical signal.Here the detection signal of take describes as SD signal as example.

Reset2 is the reset signal that logical block is exported to OLT receiver, and when SD is invalid, indication OLT receiver stops the operation for uplink optical signal, and when SD is effective, indication OLT receiver is carried out the operation for uplink optical signal;

Reset1 is logical block to the reset signal of timing unit output again, when SD is effective, indicates timing unit to reset to local register again;

Tx_burst is the switch controlling signal that logical block is exported to ONU transceiver, and when SD is effective, OLT receiver is carried out the operation for uplink optical signal.

Suppose uplink optical signal OLT Optical that OLT receiver receives (the guard time Guard Time in Fig. 4 as shown in Figure 4; being illustrated in this time period does not have upward signal to input OLT receiver); OLT receiver is according to the power of light signal of input and duration output SD to logical block, and logical block is as follows according to reset2, the reset1 of SD output and the process of Tx_burst:

[1], at t1 constantly, there is uplink optical signal input OLT receiver,, through time delay t _delay1, OLT exports high level (in Fig. 4, SD signal shows to have uplink optical signal input with high level) to logical block;

[2], SD signal to be detected be high level to logical block, through time delay t _delay6, at t2, constantly to ONU transceiver output high level (Tx_burst in Fig. 4 is now high level), indication ONU transceiver is opened emission switch, carries out the operation for uplink optical signal.

[3], SD signal to be detected be high level to logical block, through time delay t _delay4, at t3, constantly to OLT receiver output low level (reset2 in Fig. 4 is now low level), indication OLT receiver is cancelled reset, carries out the operation for uplink optical signal.

[4], logical block after the moment, is passed through time delay t at t3 _delay5, at t4, constantly to timing unit output reset signal (reset1 in Fig. 4 be now high level) again, indicate again timing unit to reset, then timing unit is by local register zero clearing, starts to carry out the fixed cycle operator again for the uplink electrical signals of inputting.

[5], at t5 constantly, there is no uplink optical signal input OLT receiver, OLT receiver is through time delay t _delay2at t6 constantly to logical block output low level (the SD signal in Fig. 4 is now low level).

[6], SD signal to be detected be low level to logical block and keep certain this Tth of width Tth(to be configured by the register of logical block), through time delay t _delay6, at t7, constantly to ONU transceiver output low level (Tx_burst in Fig. 4 is now low level), indication ONU transceiver is closed emission switch, stops the operation for uplink optical signal.

[7], SD signal to be detected be low level to logical block, through time delay t _delay3, at t8, constantly to OLT receiver output high level (reset2 in Fig. 4 is now high level), indication OLT receiver resets, and stops the operation for uplink optical signal, and hold reset state.

Above-mentioned t _delay1, t _delay2can be configured by the register of OLT receiver t _delay3, t _delay4, t _delay5, t _delay6can be configured by the register of logical block.Above-mentioned reset1 and reset2 show, and to be high level effective, certainly, also can be configured to Low level effective.

Photoelectricity optical repeater in the embodiment of the present invention one, consists of ONU transceiver and OLT receiver, because both functions are well defined, therefore, simple in structure, more easily realizes.

By the scheme of the embodiment of the present invention one, photoelectricity optical repeater has been realized shaping again, amplification and the timing more again to uplink optical signal, the uplink optical signal quality that makes to export to OLT or H-OLT is better, improved the reliability of optical fiber communication, because the photoelectricity optical repeater in the embodiment of the present invention one can carry out shaping again, amplification and timing more again to up light, therefore, the photoelectricity optical repeater in the embodiment of the present invention can zoom out the transmission range of light signal.

Embodiment bis-

As shown in Figure 5, be the structural representation of the length in the embodiment of the present invention two apart from box, described length comprises apart from box: image intensifer (Optical Amplifier, OA) 21,1:4 coupler 22 and photoelectricity optical repeater 23, wherein:

Described OA 21, exports to 1:N coupler 22 after amplifying for the downlink optical signal to from OLT;

Described 1:4 coupler 22, for the downlink optical signal of OA output is divided into N road, and exports to respectively N the optical splitter being connected with self, and exports to photoelectricity optical repeater 23 after the uplink optical signal of each coupled optical splitter output is coupled as to a road;

Described photoelectricity optical repeater 23, carries out shaping again and amplifies for the uplink optical signal to from 1:4 coupler 22, and exporting to OLT.

Preferably, described in order to reduce uplink optical signal by the Insertion Loss of 1:4 coupler 22, photoelectricity optical repeater 23 and 1:4 coupler 22 are connected by multimode fiber (Multi-Mode Fiber, MMF).

Because 1:4 coupler 22 has the asymmetry of light signal loss, the loss that is light signal is relevant by the direct of travel of self with light signal, when light signal is from monomode fiber (Single Mode Fiber, SMF) through 1:4 coupler 22, be transferred to multimode fiber, the loss of light signal is 1dB; And work as light signal, from multimode fiber, through 1:4 coupler 22, be transferred to monomode fiber, the loss of light signal is 10lg (1/4) dB, therefore, in embodiments of the invention, photoelectricity optical repeater 23 and 1:4 coupler 22 are by multimode fiber (Multi-Mode Fiber, MMF) be connected, and to the loss with downlink optical signal, the increase of multiplication factor that can be by 21 pairs of downlink optical signals of OA makes up.

Concrete, the structural representation that 1:4 coupler 22 is connected with monomode fiber with multimode fiber as shown in Figure 6, is wherein connected with the multimode port of 1:4 coupler 22 with multimode fiber, and monomode fiber is connected with the single mode port of 1:4 coupler 22.

When 4 road uplink optical signals are transferred to 1:4 coupler through a plurality of monomode fibers, 1:4 coupler utilizes flowcollector aggregation scheme FlowCollector (as: lens, fusion vertebral pulling mode) to be combined into a road to this 4 road uplink optical signal and exports to multimode fiber.

Preferably, described length also comprises apart from box: shunt 24 and local management unit 25;

Described shunt 24, exports to local management unit 25 for the downlink optical signal from OLT being divided into two-way ，Yi road, and described OA 21 is exported on another road, and the uplink optical signal of described photoelectricity optical repeater 23 outputs is forwarded to OLT.

Described local management unit 25, for according to the downlink optical signal receiving, photoelectricity optical repeater 23 and OA21 being carried out to parameter configuration, and reports local parameter information to OLT.

Concrete, described photoelectricity optical repeater 23 comprises: ONU transceiver 31 and OLT receiver 32;

Described ONU transceiver 31, carries out exporting to shunt 24 after electric light conversion for the uplink electrical signals to from OLT receiver 32;

Described OLT receiver 32, exports to ONU transceiver after carrying out opto-electronic conversion and amplify shaping more again for the uplink optical signal to from 1:4 coupler.

Concrete, the downlink optical signal that described local management unit 25 receives from the parameter configuration that comprises photoelectricity optical repeater 23 and OA 21 of OLT, and utilize this parameter configuration by ONU, to manage and control interface (ONU Management and Control Interface, OMCI) passage is to the power of utilizing emitted light signal of photoelectricity optical repeater 23, the power of receiving optical signals and operating voltage thereof and bias current are configured, administer and maintain photoelectricity optical repeater 23, and described OMCI passage is the passage between local management unit and photoelectricity optical repeater.

It should be noted that, the downlink optical signal that local management unit in the present embodiment two receives from shunt 24 carries out parameter configuration to photoelectricity optical repeater 23, now, this configuration information is that the PON port from being connected apart from box with this length is exported, but the local management unit in the scheme of the present embodiment two be not limited to receive from its under the downlink optical signal of the PON port that is connected apart from box of length, also can receive from the parameter configuration in the downlink optical signal of other PON ports of OLT, utilize this parameter configuration to realize the parameter configuration to photoelectricity optical repeater, management and maintenance.

Length in the embodiment of the present invention two is applied in the PON system of time division multiplexing (Time Division Multiplexer) apart from box, for example: ether PON(Ethernet Passive Optical Networks, EPON) system, gigabit PON(Gigabit-capable Passive Optical Networks, GPON) system, 10,000,000,000 PON(10G-PON) system, XG-PON system, in different systems, length of the present invention can configure according to the requirement of each system accordingly apart from the photoelectricity optical repeater in box, to adapt to corresponding system.

In scheme due to the embodiment of the present invention two, on the one hand, long photoelectricity optical repeater in box has carried out shaping again and has amplified uplink optical signal, long image intensifer in box has carried out amplifying to downlink optical signal again, extended the transmission range of light signal, on the other hand, because 1:N coupler is less to the Insertion Loss of uplink optical signal, use the length in the embodiment of the present invention can increase the splitting ratio in TDM-PON apart from box.Therefore, can realize in the length that guarantees light signal greatly apart from transmission situation, increase splitting ratio, and then make to utilize the PON port of negligible amounts, just can the more user of load.

Fig. 7 has shown that the length in the embodiment of the present invention two is applied to the structural representation of GPON system apart from box, the length of take in Fig. 7 comprises 1:4 coupler as example in box, by length of the present invention apart from box, 4 ODN in background technology are all based upon under a PON port of OLT of GPON, realized large splitting ratio, can connect more ONU, also serve more user, the PON port that has improved OLT is set up the efficiency of ODN.

Embodiment tri-

Consider that the ONU transceiver 31 in photoelectricity optical repeater need to close its emission switch when not carrying out the transmitting of uplink optical signal, stop the operation for uplink optical signal, to avoid crosstalking of other light signals, guarantee the normal operation of photoelectricity optical repeater; And OLT receiver 32 is when this receives uplink optical signal, timely hold reset state, so that the uplink optical signal of inputting next time in it is processed, on the basis of the embodiment of the present invention three based on embodiment bis-, the long structure apart from box is done further to optimize, and its schematic diagram as shown in Figure 8.

Described photoelectricity optical repeater 23 also comprises: logical block 33;

Described OLT receiver 32, also for to logical block output detection signal, when this detection signal is SD signal, detection signal is effective when OLT receiver 32 receives the uplink optical signal of output of 1:N coupler, for high level, when this detection signal is LOS signal, detection signal is effective when OLT receiver 32 does not receive the uplink optical signal of 1:N coupler output, is low level;

Described logical block 33, for the detection signal receiving, be that SD signal and detection signal are when invalid, indication ONU transceiver 31 and OLT receiver 32 stop carrying out the operation for uplink optical signal, at the detection signal receiving, be SD signal and detection signal when effective, the operation that indication ONU transceiver 31 and OLT receiver 32 are carried out for uplink optical signal; At the detection signal receiving, be that LOS signal and detection signal are when effective, indication ONU transceiver 31 and OLT receiver 32 stop carrying out the operation for uplink optical signal, at the detection signal receiving, be LOS signal and detection signal when invalid, the operation that indication ONU transceiver 31 and OLT receiver 32 are carried out for uplink optical signal.

Preferably, in order to realize length, apart from box, there is the timing function again to uplink optical signal, make the quality of the long uplink optical signal apart from box output better, the embodiment of the present invention three provides three kinds long apart from box, its structural representation is respectively as shown in Fig. 9, Figure 10 and Figure 11, its basic thought is and from downlink optical signal, extracts reference clock, utilizes the reference clock extracting to carry out regularly upward signal again.In conjunction with Fig. 9, Figure 10 and Figure 11, long three kinds of structures apart from box are described respectively below.

The first structure:

As shown in Figure 9, described length also comprises apart from box: optical splitter 26 and the first smooth diplexer 27; Described ONU transceiver 31 comprises uplink optical signal emission port and downlink optical signal receiving port; Described photoelectricity optical repeater 23 also comprises: clock recovery unit 34 and again timing unit 35, wherein:

Described optical splitter 26, for the downlink optical signal of shunt 25 outputs is divided into two-way, and wherein the first smooth diplexer 27 is exported on a road, and OA 21 is exported on another road, and receive the uplink optical signal from the first smooth diplexer 27, and exported to shunt 25;

The first smooth diplexer 27, for the light signal receiving is identified, when receiving the uplink optical signal of exporting from the uplink optical signal emission port of ONU transceiver 31, exported to optical splitter 26, when the downlink optical signal receiving from optical splitter 26, exported to the downlink optical signal receiving port of ONU transceiver 31;

Described ONU transceiver 31, also for receiving the downlink optical signal of the first smooth diplexer 27 outputs, and is converted to downlink electrical signal by this downlink optical signal and exports clock recovery unit 34 to;

Described clock recovery unit 34, extracts reference clock for the downlink electrical signal from receiving, and exports described reference clock to timing unit 35 again;

Described timing unit again 35, carries out regularly described uplink electrical signals for receiving the uplink electrical signals of OLT receiver 32 output, utilize the reference clock receiving again, and exports the uplink electrical signals after regularly again to ONU transceiver 31.

The second structure:

As shown in figure 10, described length also comprises apart from box: optical splitter 26 and the first smooth diplexer 27, described ONU transceiver 31 comprises uplink optical signal emission port and downlink optical signal receiving port, and described photoelectricity optical repeater 23 also comprises: clock recovery unit 34 and again timing unit 35;

The first smooth diplexer 27, for the light signal receiving is identified, when receiving the uplink optical signal of exporting from the uplink optical signal emission port of ONU transceiver, exported to shunt 24, when the downlink optical signal receiving from shunt 24, exported to optical splitter 26;

Optical splitter 26, for the downlink optical signal of the first smooth diplexer 27 outputs is divided into two-way, and exports a road wherein to the downlink optical signal receiving port of ONU transceiver 31, and OA 21 is exported on another road;

Described ONU transceiver 31, also for receiving the downlink optical signal of optical splitter 26 output, and is converted to downlink electrical signal by this downlink optical signal and exports clock recovery unit 34 to;

At Fig. 9, be the same with the long device apart from box inside in Figure 10, there is variation in annexation just.

The third structure:

As shown in figure 11, described length also comprises apart from box: embedded Optical Network Terminal (Embedded Optical Network Terminal, EONT) the 29 and first smooth diplexer 27; Described photoelectricity optical repeater 23 also comprises: timing unit 35 again;

Described the first smooth diplexer 27, for the light signal receiving is carried out to separation, when receiving the uplink optical signal of exporting from ONU transceiver 31, export this uplink optical signal to shunt 24, when the downlink optical signal receiving from shunt 24, export this downlink optical signal to image intensifer 21;

Described EONT 29 for by being converted to downlink electrical signal from the downlink optical signal of shunt 24 outputs, extracts reference clock from this downlink electrical signal, with reference to clock, exports timing unit again to, exports this downlink electrical signal to local management unit 25;

Described timing unit again 35, for receiving the uplink electrical signals of OLT receiver 32 output, utilizes the reference clock of EONT 29 outputs to carry out regularly described uplink electrical signals again, and exports the uplink electrical signals after regularly again to ONU transceiver 31.

Preferably, in above-mentioned three kinds of structures, in order to make length, apart from box, can accurately carry out accurately more regularly the uplink optical signal from different, when described logical block 33 is also effective for the detection signal receiving, indicate again 35 pairs of local registers of timing unit to reset, or, when the detection signal receiving is invalid, indicating 35 pairs of local registers of timing unit to reset again, be also about to local register zero clearing, is regularly preparing again of the uplink electrical signals of OLT receiver 32 output.

Preferably, in above-mentioned three kinds of structures, described length also comprises apart from box: the second smooth diplexer 28, when the light signal receiving is separated in to the uplink optical signal receiving from 1:N coupler 22, export this uplink optical signal to OLT receiver 32, when receiving the downlink optical signal of exporting from OA21, export this downlink optical signal to 1:4 coupler 22.

Preferably, described the first smooth diplexer 27 is wave-division multiplexer filter or optical circulator, and described the second smooth diplexer 28 is wave-division multiplexer filter or optical circulator.

When described the first smooth diplexer 27 is wave-division multiplexer filter, its structure as shown in figure 12;

When described the second smooth diplexer 28 is wave-division multiplexer filter, its structure as shown in figure 13;

R shown in Figure 12 and Figure 13 is the reflector port of wave-division multiplexer filter, P is the transmission port of wave-division multiplexer filter, C is the public port of wave-division multiplexer filter, wave-division multiplexer filter utilizes linear filter sheet to carrying out separation from the light signal of public port C input, when the wavelength of the light signal of inputting is less than the sideband wavelength of linear filter sheet, it is exported from P mouth; When the wavelength of the light signal of inputting is greater than the sideband wavelength of linear filter sheet, it is exported from R mouth.

The sideband wavelength of described linear filter sheet can be determined according to the wave-length coverage of up-downgoing light signal, for example: the wave-length coverage of supposing uplink optical signal is 1260 nanometers (nm) ~ 1360nm, the wave-length coverage of downlink optical signal is 1480 ~ 1550nm, sideband wave is grown up and is less than 1480nm in 1360nm, for example, can get 1450nm.

When described the first smooth diplexer 27 and the second smooth diplexer 28 are wave-division multiplexer filter, remember that the first smooth diplexer is the first wave-division multiplexer filter, the second smooth diplexer is the second wave-division multiplexer filter, the long structural representation apart from box is as shown in figure 14.

In Figure 14, the reflector port R of the first wave-division multiplexer filter is connected with the uplink optical signal emission port of ONU transceiver 31 by monomode fiber, public port C is connected with shunt 24 by monomode fiber, and transmission port P is connected with optical splitter 26 by monomode fiber;

The reflector port R of the second wave-division multiplexer filter is connected with image intensifer 21 by monomode fiber, and public port C is connected with 1:4 coupler 22 by multimode fiber, and transmission port P is connected with OLT receiver 32 by multimode fiber;

When described the first smooth diplexer 27 and the second smooth diplexer 28 are optical circulator, remember that the first smooth diplexer is the first optical circulator, the second smooth diplexer is optical circulator, the long structural representation apart from box is as shown in figure 15.

Optical circulator has three ports, be respectively port one, port 2 and port 3, (in Figure 15, with 1,2,3, representing), port one is the input port of light signal, port 2 is input/output end ports of light signal, and port 3 is output ports of light signal, and the transmission path of light signal can only be from port one to port 2, or from port 2 to port 3, other transmission paths are forbidden.

In Figure 15, the port one of the first optical circulator is connected with the uplink optical signal emission port of ONU transceiver 31 by monomode fiber, and port 2 is connected with shunt 24 by monomode fiber, and port 3 is connected with optical splitter 26 by monomode fiber;

The port one of the second optical circulator is connected with image intensifer 21 by monomode fiber, and port 2 is connected with 1:4 coupler 22 by multimode fiber, and port 3 is connected with OLT receiver 32 by multimode fiber;

Because light signal is less to multimode fiber Insertion Loss from monomode fiber, and it is larger to monomode fiber Insertion Loss from multimode fiber, therefore, above-mentioned up-downgoing light signal wave-division multiplexer filter or optical circulator transmitting procedure in, downlink optical signal signal through monomode fiber input reflection port R to public port C(or from port one to port 2), Insertion Loss is less; Uplink optical signal is from public port C to the transmission port P(being connected with multimode fiber or from port 2 to port 3) Insertion Loss is also less.

The length of above-mentioned Figure 14 is, on the basis of Figure 10, the first diplexer is replaced with to the first wave-division multiplexer filter apart from box structure, the second diplexer is replaced with to the second wave-division multiplexer filter obtains, the length of Figure 15 is, on the basis of Figure 10, the first diplexer is replaced with to the first optical circulator apart from box structure, the second diplexer is replaced with to the second optical circulator obtains, Fig. 9 and Figure 11 also can carry out above-mentioned replacement, repeat no more here.

At long photoelectricity optical repeater in above-mentioned three kinds of structures of box, it can be the photoelectricity optical repeater in embodiment mono-, that is to say, logical block is after receiving the detection signal of OLT receiver output, the clock signal of the logical block output that output timing signal is a kind of with embodiment is identical, repeats no more here.

By the scheme of the embodiment of the present invention three, long photoelectricity optical repeater in box has been realized the shaping again to uplink optical signal, amplify again and timing again, the uplink optical signal quality that makes to export to OLT is better, long image intensifer in box has been realized the amplification to downlink optical signal, improved the reliability of optical fiber communication, because the length in the embodiment of the present invention three can be carried out shaping again to up light apart from box, amplify again and more regularly and downlink optical signal is amplified, therefore, length in the embodiment of the present invention can zoom out the transmission range of light signal apart from box, this just makes the length in the embodiment of the present invention can place from OLT compare Yuan position apart from box.

Embodiment tetra-

Consider in existing passive optical network system, in order to increase user's bandwidth, wavelength-division multiplex technique and time-division multiplex technology are combined, be applied in passive optical network simultaneously, now this germline is referred to as wavelength-division and time-division multiplexing passive optical network system, now the optical line terminal in this system is mixed light line terminal (Hybird OLT, H-OLT), ONU is accordingly also for mixing ONU(Hybird ONU, H-ONU), in order to improve in this kind of system at long splitting ratio under transmission, the embodiment of the present invention four provides a kind of length apart from box, its structural representation as shown in figure 16, described length comprises apart from box: the first multiplexing demultiplexing device 20, the second multiplexing demultiplexing device 29, image intensifer OA 21, 1:4 coupler 22 and n photoelectricity optical repeater 23, described n is greater than 1 positive integer,

Described OA 21, exports to 1:N coupler 22 after amplifying for the downlink optical signal to from optical line terminal OLT;

Described 1:4 coupler 22, for the downlink optical signal of OA output is divided into 4 tunnels, and exports to respectively 4 optical splitters that are connected with self, and exports to the second multiplexing demultiplexing device 29 after the uplink optical signal of each optical splitter output is coupled as to a road;

Described the second multiplexing demultiplexing device 29, for the uplink optical signal from 1:4 coupler 22 is decomposed into k road uplink optical signal, and export to k photoelectricity optical repeater 23, wherein, in the uplink optical signal of described k road, the wavelength of light wave that carries every road uplink optical signal is different, and described k is greater than 1 and be less than or equal to the positive integer of n;

Described photoelectricity optical repeater 23, for carrying out the uplink optical signal from the second multiplexing demultiplexing device 29 shaping again and exporting to the first multiplexing demultiplexing device 20 after amplification again;

Described the first multiplexing demultiplexing device 20, for the k road uplink optical signal from photoelectricity optical repeater 23 is combined into traveling optical signal on the way, and exports to H-OLT.

Preferably, for the Insertion Loss of uplink optical signal through 1:4 coupler 22, described OA 21 is connected by multimode fiber with 1:N coupler 22;

Preferably, default for carrying the wavelength of light wave and the uplink optical signal of the second multiplexing demultiplexing device 29 transmissions of uplink optical signal in described photoelectricity optical repeater 23, identical for carrying the wavelength of light wave of this uplink optical signal;

Described the second multiplexing demultiplexing device 29, specifically for the uplink optical signal from 1:4 coupler 22 being decomposed into k road uplink optical signal, and respectively according to the wavelength of the light wave of each road uplink optical signal of carrying, described k road uplink optical signal is exported to respectively to Wavelength matched photoelectricity optical repeater 23.

Preferably, for the ease of H-OLT to long apart from box be configured, management and maintenance, described length also comprises apart from box: shunt 24 and local management unit 25;

Described shunt 24, exports to local management unit 25 for the downlink optical signal from H-OLT being divided into two-way ，Yi road, and described OA 21 is exported on another road, and the uplink optical signal of described the first multiplexing demultiplexing device 20 outputs is forwarded to H-OLT;

Described local management unit 25, for according to the downlink optical signal receiving, photoelectricity optical repeater and OA being carried out to parameter configuration, and reports local parameter information to OLT.

Preferably, described photoelectricity optical repeater 23 comprises: ONU transceiver 31 and OLT receiver 32;

Described OLT receiver 32, exports to the ONU transceiver of the photoelectricity optical repeater at self place for the uplink optical signal to from the second multiplexing demultiplexing device after carrying out opto-electronic conversion and amplify again shaping again;

Described ONU transceiver 31, carries out exporting to the first multiplexing demultiplexing device after electric light conversion for the uplink electrical signals to from OLT receiver.

Preferably, described photoelectricity optical repeater also comprises: logical block 33;

Described OLT receiver 32, also for to logical block output detection signal, when this detection signal is SD signal, detection signal is effective when OLT receiver receives the uplink optical signal of the second multiplexing demultiplexing device output, for high level, when this detection signal is LOS signal, detection signal is effective when OLT receiver does not receive the uplink optical signal of the second multiplexing demultiplexing device output, is low level;

Described logical block 33, for the detection signal receiving, be that SD signal and detection signal are when invalid, indication ONU transceiver and OLT receiver stop carrying out the operation for uplink optical signal, at the detection signal receiving, be SD signal and detection signal when effective, indication ONU transceiver and OLT receiver are carried out the operation for uplink optical signal; At the detection signal receiving, be that LOS signal and detection signal are when effective, indication ONU transceiver and OLT receiver stop carrying out the operation for uplink optical signal, at the detection signal receiving, be LOS signal and detection signal when invalid, indication ONU transceiver and OLT receiver are carried out the operation for uplink optical signal.

Preferably, in order to realize, uplink optical signal is carried out regularly again, above-mentioned length has been carried out to further optimization apart from the structure of box, here introduce the three kinds long structures apart from box, all can realize uplink optical signal is carried out regularly again, now, these three kinds of different length, describe the long structure apart from box in conjunction with Figure 17, Figure 18 and Figure 19 respectively respectively as shown in Figure 17, Figure 18 and Figure 19 below apart from box structure.

For the length in Figure 17 apart from box, it is except comprising the first multiplexing demultiplexing device 20, the second multiplexing demultiplexing device 29,1:4 coupler 22, image intensifer OA 21, a n photoelectricity optical repeater 23, shunt 24 and local management unit 25, also comprise optical splitter 26, n the first smooth diplexer 27, wherein, described n the first smooth diplexer 27 and n photoelectricity optical repeater 23 are corresponding one by one; Described ONU transceiver 31 comprises uplink optical signal emission port and downlink optical signal receiving port;

Described optical splitter 26, for the downlink optical signal of shunt 24 outputs is divided into two-way, and wherein the first multiplexing demultiplexing device 20 is exported on a road, and OA 21 is exported on another road, and receive the uplink optical signal from the first multiplexing demultiplexing device 20, and exported to shunt 24;

The first smooth diplexer 27, for the light signal receiving is carried out to separation, when receiving the uplink optical signal of exporting from the uplink optical signal emission port of the ONU transceiver 31 in the photoelectricity optical repeater corresponding with self, exported to the first multiplexing demultiplexing device, when the downlink optical signal receiving from the first multiplexing demultiplexing device, exported to the downlink optical signal receiving port of described ONU transceiver 31;

Described photoelectricity optical repeater also comprises: clock recovery unit 34 and again timing unit 35;

Described ONU transceiver 31, also for receiving the downlink optical signal of the first smooth diplexer output that photoelectricity optical repeater with self place is corresponding, and this downlink optical signal is converted to the clock recovery unit 34 in the photoelectricity optical repeater that downlink electrical signal exports self place to;

Described clock recovery unit 34, extracts reference clock for the downlink electrical signal from receiving, and described reference clock is exported to the timing unit again in the photoelectricity optical repeater at self place;

Described timing unit again 35, for receiving the uplink electrical signals of OLT receiver 32 outputs of the photoelectricity optical repeater at self place, the reference clock that utilization receives carries out regularly described uplink electrical signals again, and the uplink electrical signals after regularly is again exported to the ONU transceiver 31 in the photoelectricity optical repeater at self place.

For the length in Figure 18 apart from box, it,, except comprising the first multiplexing demultiplexing device 20, the second multiplexing demultiplexing device 29,1:4 coupler 22, image intensifer OA 21, a n photoelectricity optical repeater 23, shunt 24 and local management unit 25, also comprises: the smooth diplexer 27 of optical splitter 26, first and the 3rd multiplexing demultiplexing device 30; Described ONU transceiver comprises uplink optical signal emission port and downlink optical signal receiving port;

Described the first smooth diplexer 27, for the light signal receiving is carried out to separation, when receiving the uplink optical signal of exporting from the uplink optical signal emission port of the first multiplexing demultiplexing device 20, export this uplink optical signal to shunt 24, when the downlink optical signal receiving from shunt, export this downlink optical signal to optical splitter 26;

Described optical splitter 26, for the downlink optical signal of the first smooth diplexer output is divided into two-way, and wherein the 3rd multiplexing demultiplexing device 30 is exported on a road, and OA 21 is exported on another road;

Described the 3rd multiplexing demultiplexing device 30, for the downlink optical signal from optical splitter is decomposed into m road downlink optical signal, export to respectively the downlink optical signal receiving port of m the ONU transceiver 31 in photoelectricity optical repeater 23, wherein, in the downlink optical signal of described m road, the wavelength of light wave that carries every road downlink optical signal is different, and described m is greater than 1 and be less than or equal to the positive integer of n;

Described ONU transceiver 31, also for receiving the downlink optical signal of the 3rd multiplexing demultiplexing device 30 output, and is converted to the clock recovery unit 34 in the photoelectricity optical repeater 23 that downlink electrical signal exports self place to by this downlink optical signal;

Described clock recovery unit 34, extracts reference clock for the downlink electrical signal from receiving, and described reference clock is exported to the timing unit again 34 in the photoelectricity optical repeater 23 at self place;

Described timing unit again 34, for receiving the uplink electrical signals of OLT receiver 32 outputs of the photoelectricity optical repeater 23 at self place, the reference clock that utilization receives carries out regularly described uplink electrical signals again, and the uplink electrical signals after regularly is again exported to the ONU transceiver 31 in the photoelectricity optical repeater at self place.

Preferably, the downlink optical signal of the wavelength of the default light wave for bearing downlink light signal and the 3rd multiplexing demultiplexing device 30 transmissions in described photoelectricity optical repeater is identical for carrying the wavelength of light wave of this downlink optical signal;

Described the 3rd multiplexing demultiplexing device 30, specifically for the downlink optical signal from optical splitter being decomposed into the downlink optical signal on m road, and respectively according to the wavelength of the light wave of each road downlink optical signal of carrying, described m road downlink optical signal is exported to respectively to Wavelength matched photoelectricity optical repeater.

For the length in Figure 19 apart from box, except comprising the first multiplexing demultiplexing device 20, the second multiplexing demultiplexing device 29,1:4 coupler 22, image intensifer OA 21, a n photoelectricity optical repeater 23, shunt 24 and local management unit 25, also comprise: the first smooth diplexer 27, the 3rd multiplexing demultiplexing device 30 and n embedded Optical Network Terminal EONT 36, an a described n EONT 36 and described n photoelectricity optical repeater 23 is corresponding one by one, described photoelectricity optical repeater also comprises: timing unit 35 again, wherein:

Described the first smooth diplexer 27, for the light signal receiving is carried out to separation, when receiving the uplink optical signal of exporting from the first multiplexing demultiplexing device 20, export this uplink optical signal to H-OLT, when the downlink optical signal receiving from H-OLT, export this downlink optical signal to shunt 24;

Described shunt 24, exports to the 3rd multiplexing demultiplexing device 30， mono-tunnel and exports to image intensifer 21 for the downlink optical signal of the first smooth diplexer 27 outputs being divided into two-way ，Yi road.

Described the 3rd multiplexing demultiplexing device 30, for the downlink optical signal of shunt 24 outputs is decomposed into m road downlink optical signal and exports to respectively m EONT 36, wherein, in the downlink optical signal of described m road, the wavelength of light wave that carries every road downlink optical signal is different, and described m is greater than 1 and be less than or equal to the positive integer of n;

Described EONT 36, for the downlink optical signal receiving is converted to downlink electrical signal, from this downlink electrical signal, extract reference clock, with reference to clock, export the timing unit again in the photoelectricity optical repeater corresponding with it to, export this downlink electrical signal to local management unit;

Described timing unit again 35, for receiving the uplink electrical signals of OLT receiver output of the photoelectricity optical repeater at self place, utilize the reference clock of described EONT 36 outputs to carry out again regularly described uplink electrical signals, and the uplink electrical signals after regularly is again exported to the ONU transceiver 31 in the photoelectricity optical repeater at self place.

Preferably, in described photoelectricity optical repeater 23 wavelength of the default light wave for bearing downlink light signal with, default identical for carrying the wavelength of light wave of this downlink optical signal in the EONT 36 corresponding with it, the downlink optical signal of the wavelength of the default light wave for bearing downlink light signal and the 3rd multiplexing demultiplexing device 30 transmissions in described EONT is identical for carrying the wavelength of light wave of this downlink optical signal;

Described the 3rd multiplexing demultiplexing device 30, specifically for the downlink optical signal of shunt 24 outputs is decomposed into m road downlink optical signal, and respectively according to the wavelength of the light wave of each road downlink optical signal of carrying, described m road downlink optical signal is exported to respectively to Wavelength matched EONT 36.

Preferably, the logical block 33 in described photoelectricity optical repeater, when also effective for the detection signal receiving, indicate again timing unit to reset to the register of himself, or, when the detection signal receiving is invalid, indicate again timing unit to reset to the register of himself.

Preferably, described length, apart from box, also comprises:

The second smooth diplexer 28, for the light signal receiving is carried out to separation, when the uplink optical signal receiving from 1:N coupler, export this uplink optical signal to second multiplexing demultiplexing device 29, when the downlink optical signal receiving from OA 21, export this downlink optical signal to 1:N coupler 22.

Preferably, described the second smooth diplexer is connected by multimode fiber with the second multiplexing demultiplexing device, between described the second multiplexing demultiplexing device and n photoelectricity optical repeater, by multimode fiber, is connected.

Preferably, described the first smooth diplexer 27 is wave-division multiplexer filter or optical circulator; The second smooth diplexer 28 is wave-division multiplexer filter or optical circulator.

Preferably, described length is applied in the passive optical network of Wave time division mixed multiplexing apart from box.

Embodiment five

Length based on above-described embodiment two and embodiment tri-is apart from box, and the embodiment of the present invention five proposes a kind of processing method to uplink optical signal, and as Figure 20, described method comprises:

Step 101:1:N coupler, when receiving the uplink optical signal of each optical splitter, is exported to photoelectricity optical repeater after the uplink optical signal of each optical splitter is coupled as to a road.

Step 102: photoelectricity optical repeater carries out shaping again and amplifies the uplink optical signal of 1:N coupler output, and exports to OLT.

Preferably, photoelectricity optical repeater carries out shaping again to the uplink optical signal of 1:N coupler output and again after amplification, described method also comprises:

Shunt receive shaping again and amplify again after uplink optical signal, and exported to OLT;

Preferably, photoelectricity optical repeater carries out shaping again and amplifies and be specially again the uplink optical signal of 1:N coupler output:

OLT receiver is exported to ONU transceiver after the uplink optical signal from 1:N coupler is carried out opto-electronic conversion and amplifies shaping more again;

ONU transceiver carries out exporting to OLT after electric light conversion to the uplink electrical signals from OLT receiver.

Preferably, described photoelectricity optical repeater carries out shaping again, amplification and timing more again to the uplink optical signal of 1:N coupler output, and exports to OLT.

Wherein, the specific implementation that described photoelectricity optical repeater carries out timing again to uplink optical signal refers to embodiment mono-and embodiment bis-, repeats no more herein.

Embodiment six

Length based in above-described embodiment two and embodiment tri-is apart from box, and the embodiment of the present invention six proposes a kind of processing method to downlink optical signal, and as Figure 21, described method comprises:

Step 201:OA, when the downlink optical signal receiving from optical line terminal OLT, amplifies described downlink optical signal and exports to 1:N coupler;

Step 202:1:N coupler is divided into N road by the downlink optical signal of the output of photoelectricity optical repeater, and exports to respectively N the optical splitter being connected with self.

Preferably, before photoelectricity optical repeater carries out shaping again by the downlink optical signal receiving and amplifies, described method also comprises:

Shunt is divided into two-way ，Yi road by the downlink optical signal from OLT and exports to local management unit, and described OA is exported on another road;

Local management unit carries out parameter configuration according to the downlink optical signal receiving to photoelectricity optical repeater.

Embodiment seven

Length based in above-described embodiment four is apart from box, and the embodiment of the present invention seven proposes a kind of processing method to downlink optical signal, as shown in figure 22, comprises the following steps:

Step 301:1:N coupler, when the uplink optical signal receiving from each coupled optical splitter, is exported to the second multiplexing demultiplexing device after the uplink optical signal of each optical splitter is coupled as to a road;

Step 302: the second multiplexing demultiplexing device will be decomposed into k road uplink optical signal in the uplink optical signal of 1:N coupler output, and export to respectively k photoelectricity optical repeater, wherein, in the uplink optical signal of described k road, the wavelength of light wave that carries every road uplink optical signal is different, and described k is greater than 1 and be less than or equal to the positive integer of n;

Step 303:k photoelectricity optical repeater carries out shaping again and after amplification, exports to the first multiplexing demultiplexing device again the uplink optical signal of the second multiplexing demultiplexing device output respectively;

Step 304: the first multiplexing demultiplexing device is combined into traveling optical signal on the way by the uplink optical signal of k photoelectricity optical repeater output, and exports to H-OLT.

Embodiment eight

Length based in above-described embodiment four is apart from box, and the embodiment of the present invention six proposes a kind of processing method to downlink optical signal, as shown in figure 23, comprises the following steps:

Step 401:OA, when the downlink optical signal receiving from H-OLT, amplifies this downlink optical signal and exports to 1:N coupler;

Step 402:1:N coupler is divided into N road by the downlink optical signal of OA output, and exports to respectively N the optical splitter being connected with self.

Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.

Claims

1. a photoelectricity optical repeater, is characterized in that, described photoelectricity optical repeater comprises: optical network unit ONU transceiver and optical line terminal OLT receiver;

2. photoelectricity optical repeater as claimed in claim 1, is characterized in that, described photoelectricity optical repeater also comprises: logical block;

Described OLT receiver, also for to logical block output detection signal, when this detection signal is SD signal, detection signal is effective when OLT receiver receives uplink optical signal, is high level; When this detection signal is LOS signal, detection signal is effective when OLT receiver does not receive uplink optical signal, is low level;

Described logical block, for the detection signal receiving, be that SD signal and detection signal are when invalid, indication ONU transceiver and OLT receiver stop carrying out the operation for uplink optical signal, at the detection signal receiving, be SD signal and detection signal when effective, indication ONU transceiver and OLT receiver are carried out the operation for uplink optical signal; At the detection signal receiving, be that LOS signal and detection signal are when effective, indication ONU transceiver and OLT receiver stop carrying out the operation for uplink optical signal, at the detection signal receiving, be LOS signal and detection signal when invalid, indication ONU transceiver and OLT receiver are carried out the operation for uplink optical signal.

3. photoelectricity optical repeater as claimed in claim 2, is characterized in that, described photoelectricity optical repeater also comprises clock recovery unit, clock unit and timing unit again;

Described ONU transceiver, also exports to clock recovery unit for the downlink electrical signal that the downlink optical signal of reception is carried out obtaining after opto-electronic conversion;

Described clock recovery unit for receiving the downlink electrical signal of ONU transceiver output, and extracts reference clock from this downlink electrical signal, with reference to clock, exports timing unit again to;

Described timing unit again, for receiving the uplink electrical signals of OLT receiver output and the reference clock of clock recovery unit output, utilize described reference clock to carry out again regularly described uplink electrical signals, and export the uplink electrical signals after regularly again to ONU transceiver.

4. photoelectricity optical repeater as claimed in claim 3, is characterized in that,

Described logical block, when also effective for the detection signal receiving, indicates timing unit to reset to the register of himself again, or, when the detection signal receiving is invalid, indicate again timing unit to reset to the register of himself.

5. long apart from a box, it is characterized in that, described length comprises apart from box: photoelectricity optical repeater, 1:N coupler and image intensifer OA;

Described OA, exports to 1:N coupler after amplifying for the downlink optical signal to from optical line terminal OLT;

Described 1:N coupler, for the downlink optical signal of OA output is divided into N road, and exports to respectively N the optical splitter being connected with self, and exports to photoelectricity optical repeater after the uplink optical signal of each optical splitter output is coupled as to a road;

6. length as claimed in claim 5, apart from box, is characterized in that, described length also comprises apart from box: shunt and local management unit;

Described shunt, exports to local management unit for the downlink optical signal from OLT being divided into two-way ，Yi road, and described OA is exported on another road, and the uplink optical signal of described photoelectricity optical repeater output is forwarded to OLT;

Described local management unit, for according to the downlink optical signal receiving, photoelectricity optical repeater and OA being carried out to parameter configuration, and reports local parameter information to OLT.

7. length as claimed in claim 6, apart from box, is characterized in that, described photoelectricity optical repeater comprises: ONU transceiver and OLT receiver;

Described OLT receiver, exports to ONU transceiver after carrying out opto-electronic conversion and amplify shaping more again for the uplink optical signal to from 1:N coupler;

Described ONU transceiver, carries out exporting to shunt after electric light conversion for the uplink electrical signals to from OLT receiver.

8. length as claimed in claim 7, apart from box, is characterized in that, described photoelectricity optical repeater also comprises: logical block;

Described OLT receiver, also for to logical block output detection signal, when this detection signal is SD signal, detection signal is effective when OLT receiver receives the uplink optical signal of output of 1:N coupler, for high level, when this detection signal is LOS signal, detection signal is effective when OLT receiver does not receive the uplink optical signal of 1:N coupler output, is low level;

9. length as claimed in claim 8, apart from box, is characterized in that, described length also comprises apart from box: optical splitter and the first smooth diplexer; Described ONU transceiver comprises uplink optical signal emission port and downlink optical signal receiving port;

Described optical splitter, for the downlink optical signal of shunt output is divided into two-way, and wherein the first smooth diplexer is exported on a road, and OA is exported on another road, and receives the uplink optical signal from the first smooth diplexer, and is exported to shunt;

The first smooth diplexer, for the light signal receiving is carried out to separation, when receiving the uplink optical signal of exporting from the uplink optical signal emission port of ONU transceiver, exported to optical splitter, when the downlink optical signal receiving from optical splitter, exported to the downlink optical signal receiving port of ONU transceiver;

Described photoelectricity optical repeater also comprises: clock recovery unit and again timing unit;

Described ONU transceiver, also for receiving the downlink optical signal of the first smooth diplexer output, and is converted to downlink electrical signal by this downlink optical signal and exports clock recovery unit to;

Described clock recovery unit, extracts reference clock for the downlink electrical signal from receiving, and exports described reference clock to again timing unit;

Described timing unit again, carries out regularly described uplink electrical signals for receiving the uplink electrical signals of OLT receiver output, utilize the reference clock receiving again, and exports the uplink electrical signals after regularly again to ONU transceiver.

10. length as claimed in claim 8, apart from box, is characterized in that, described length also comprises apart from box: optical splitter and the first smooth diplexer; Described ONU transceiver comprises uplink optical signal emission port and downlink optical signal receiving port;

Described the first smooth diplexer, for the light signal receiving is carried out to separation, when receiving the uplink optical signal of exporting from the uplink optical signal emission port of ONU transceiver, export this uplink optical signal to shunt, when the downlink optical signal receiving from shunt, export this downlink optical signal to optical splitter;

Described optical splitter, for the downlink optical signal of the first smooth diplexer output is divided into two-way, and exports to a road wherein the downlink optical signal receiving port of ONU transceiver, and OA is exported on another road;

Described ONU transceiver, also for receiving the downlink optical signal of optical splitter output, and is converted to downlink electrical signal by this downlink optical signal and exports clock recovery unit to;

11. length as claimed in claim 8, apart from box, is characterized in that, described length also comprises apart from box: embedded Optical Network Terminal EONT and the first smooth diplexer; Described photoelectricity optical repeater also comprises: timing unit again;

Described the first smooth diplexer, for the light signal receiving is carried out to separation, when receiving the uplink optical signal of exporting from ONU transceiver, export this uplink optical signal to shunt, when the downlink optical signal receiving from shunt, export this downlink optical signal to image intensifer;

Embedded Optical Network Terminal EONT for by being converted to downlink electrical signal from the downlink optical signal of shunt output, extracts reference clock from this downlink electrical signal, with reference to clock, exports timing unit again to, exports this downlink electrical signal to local management unit;

Described timing unit again, for receiving the uplink electrical signals of OLT receiver output, utilizes the reference clock of EONT output to carry out regularly described uplink electrical signals again, and exports the uplink electrical signals after regularly again to ONU transceiver.

12. length as described in as arbitrary in claim 9-11, apart from box, is characterized in that,

Described logical block, when also effective for the detection signal receiving, indicates timing unit to reset to local register again, or, when the detection signal receiving is invalid, indicate again timing unit to reset to local register.

13. length as described in as arbitrary in claim 9-11, apart from box, is characterized in that, described length also comprises apart from box:

The second smooth diplexer, for the light signal receiving is carried out to separation, when the uplink optical signal receiving from 1:N coupler, export this uplink optical signal to OLT receiver, when the downlink optical signal receiving from OA, export this downlink optical signal to 1:N coupler.

14. length as claimed in claim 13, apart from box, is characterized in that, described the first smooth diplexer is wave-division multiplexer filter or optical circulator; The second smooth diplexer is wave-division multiplexer filter or optical circulator.

15. length as described in as arbitrary in claim 5-11, apart from box, is characterized in that, described length is applied in the passive optical network PON system of time division multiplexing tdm apart from box.

16. 1 kinds long apart from box, it is characterized in that, described length comprises apart from box: n photoelectricity optical repeater, 1:N coupler, the first multiplexing demultiplexing device, the second multiplexing demultiplexing device and image intensifer OA, and described N is greater than 1 positive integer, and described n is greater than 1 positive integer;

Described OA, exports to 1:N coupler after amplifying for the downlink optical signal to from mixed light line terminal H-OLT;

17. length as claimed in claim 16 are apart from box, it is characterized in that, default for carrying the wavelength of light wave and the uplink optical signal of the second multiplexing demultiplexing device transmission of uplink optical signal in described photoelectricity optical repeater, identical for carrying the wavelength of light wave of this uplink optical signal;

Described the second multiplexing demultiplexing device, specifically for the uplink optical signal from 1:N coupler being decomposed into k road uplink optical signal, and respectively according to the wavelength of the light wave of each road uplink optical signal of carrying, described k road uplink optical signal is exported to respectively to Wavelength matched photoelectricity optical repeater.

18. length as claimed in claim 16, apart from box, is characterized in that, described length also comprises apart from box: shunt and local management unit;

Described shunt, exports to local management unit for the downlink optical signal from H-OLT being divided into two-way ，Yi road, and described OA is exported on another road, and the uplink optical signal of described the first multiplexing demultiplexing device output is forwarded to H-OLT;

Described local management unit, for according to the downlink optical signal receiving, photoelectricity optical repeater and OA being carried out to parameter configuration, and reports local parameter information to H-OLT.

19. length as claimed in claim 18, apart from box, is characterized in that, described photoelectricity optical repeater comprises: ONU transceiver and OLT receiver;

Described OLT receiver, exports to the ONU transceiver of the photoelectricity optical repeater at self place for the uplink optical signal to from the second multiplexing demultiplexing device after carrying out opto-electronic conversion and amplify again shaping again;

Described ONU transceiver, carries out exporting to the first multiplexing demultiplexing device after electric light conversion for the uplink electrical signals to from OLT receiver.

20. length as claimed in claim 19, apart from box, is characterized in that, described photoelectricity optical repeater also comprises: logical block;

Described OLT receiver, also for to logical block output detection signal, when this detection signal is SD signal, detection signal is effective when OLT receiver receives the uplink optical signal of the second multiplexing demultiplexing device output, for high level, when this detection signal is LOS signal, detection signal is effective when OLT receiver does not receive the uplink optical signal of the second multiplexing demultiplexing device output, is low level;

21. length as claimed in claim 20, apart from box, is characterized in that, described length also comprises apart from box: optical splitter, n the first smooth diplexer, and wherein, described n the first smooth diplexer and n photoelectricity optical repeater be correspondence one by one; Described ONU transceiver comprises uplink optical signal emission port and downlink optical signal receiving port;

Optical splitter, for the downlink optical signal of shunt output is divided into two-way, and wherein the first multiplexing demultiplexing device is exported on a road, and OA is exported on another road, and receives the uplink optical signal from the first multiplexing demultiplexing device, and is exported to shunt;

The first smooth diplexer, for the light signal receiving is carried out to separation, when receiving the uplink optical signal of exporting from the uplink optical signal emission port of the ONU transceiver in the photoelectricity optical repeater corresponding with self, exported to the first multiplexing demultiplexing device, when the downlink optical signal receiving from the first multiplexing demultiplexing device, exported to the downlink optical signal receiving port of described ONU transceiver;

Described ONU transceiver, also for receiving the downlink optical signal of the first smooth diplexer output that photoelectricity optical repeater with self place is corresponding, and this downlink optical signal is converted to the clock recovery unit in the photoelectricity optical repeater that downlink electrical signal exports self place to;

Described clock recovery unit, extracts reference clock for the downlink electrical signal from receiving, and described reference clock is exported to the timing unit again in the photoelectricity optical repeater at self place;

Described timing unit again, for receiving the uplink electrical signals of OLT receiver output of the photoelectricity optical repeater at self place, the reference clock that utilization receives carries out regularly described uplink electrical signals again, and the uplink electrical signals after regularly is again exported to the ONU transceiver in the photoelectricity optical repeater at self place.

22. length as claimed in claim 20, apart from box, is characterized in that, described length also comprises apart from box: optical splitter, the first smooth diplexer and the 3rd multiplexing demultiplexing device; Described ONU transceiver comprises uplink optical signal emission port and downlink optical signal receiving port;

Described the first smooth diplexer, for the light signal receiving is carried out to separation, when receiving the uplink optical signal of exporting from the uplink optical signal emission port of the first multiplexing demultiplexing device, export this uplink optical signal to shunt, when the downlink optical signal receiving from shunt, export this downlink optical signal to optical splitter;

Described optical splitter, for the downlink optical signal of the first smooth diplexer output is divided into two-way, and wherein the 3rd multiplexing demultiplexing device is exported on a road, and OA is exported on another road;

Described the 3rd multiplexing demultiplexing device, for the downlink optical signal from optical splitter is decomposed into m road downlink optical signal, export to respectively the downlink optical signal receiving port of m the ONU transceiver in photoelectricity optical repeater, wherein, in the downlink optical signal of described m road, the wavelength of light wave that carries every road downlink optical signal is different, and described m is greater than 1 and be less than or equal to the positive integer of n;

Described ONU transceiver, also for receiving the downlink optical signal of the 3rd multiplexing demultiplexing device output, and is converted to the clock recovery unit in the photoelectricity optical repeater that downlink electrical signal exports self place to by this downlink optical signal;

23. length as claimed in claim 22 are apart from box, it is characterized in that, the downlink optical signal of the wavelength of the default light wave for bearing downlink light signal and the transmission of the 3rd multiplexing demultiplexing device in described photoelectricity optical repeater is identical for carrying the wavelength of light wave of this downlink optical signal;

Described the 3rd multiplexing demultiplexing device, specifically for the downlink optical signal from optical splitter being decomposed into the downlink optical signal on m road, and respectively according to the wavelength of the light wave of each road downlink optical signal of carrying, described m road downlink optical signal is exported to respectively to Wavelength matched photoelectricity optical repeater.

24. length as claimed in claim 20 are apart from box, it is characterized in that, described length also comprises apart from box: the first smooth diplexer, the 3rd multiplexing demultiplexing device and n embedded Optical Network Terminal EONT, an a described n EONT and described n photoelectricity optical repeater is corresponding one by one, described photoelectricity optical repeater also comprises: timing unit again, wherein:

Described the first smooth diplexer, for the light signal receiving is carried out to separation, when receiving the uplink optical signal of exporting from the first multiplexing demultiplexing device, export this uplink optical signal to H-OLT, when the downlink optical signal receiving from H-OLT, export this downlink optical signal to shunt;

Described shunt, exports to the 3rd multiplexing demultiplexing device ，Yi road and exports to image intensifer specifically for the downlink optical signal of the first smooth diplexer output being divided into two-way ，Yi road;

Described the 3rd multiplexing demultiplexing device, for the downlink optical signal of shunt output is decomposed into m road downlink optical signal and exports to respectively m EONT, wherein, in the downlink optical signal of described m road, the wavelength of light wave that carries every road downlink optical signal is different, and described m is greater than 1 and be less than or equal to the positive integer of n;

Described EONT, for the downlink optical signal receiving is converted to downlink electrical signal, from this downlink electrical signal, extract reference clock, with reference to clock, export the timing unit again in the photoelectricity optical repeater corresponding with it to, export this downlink electrical signal to local management unit;

Described timing unit again, for receiving the uplink electrical signals of OLT receiver output of the photoelectricity optical repeater at self place, utilize the reference clock of described EONT output to carry out again regularly described uplink electrical signals, and the uplink electrical signals after regularly is again exported to the ONU transceiver in the photoelectricity optical repeater at self place.

25. length as claimed in claim 24 are apart from box, it is characterized in that, in described photoelectricity optical repeater the wavelength of the default light wave for bearing downlink light signal with, default identical for carrying the wavelength of light wave of this downlink optical signal in the EONT corresponding with it, the downlink optical signal of the wavelength of the default light wave for bearing downlink light signal and the transmission of the 3rd multiplexing demultiplexing device in described EONT is identical for carrying the wavelength of light wave of this downlink optical signal;

Described the 3rd multiplexing demultiplexing device, specifically for the downlink optical signal of shunt output is decomposed into m road downlink optical signal, and respectively according to the wavelength of the light wave of each road downlink optical signal of carrying, described m road downlink optical signal is exported to respectively to Wavelength matched EONT.

26. length as described in as arbitrary in claim 21-25, apart from box, is characterized in that,

27. length as described in as arbitrary in claim 21-25, apart from box, is characterized in that, described length also comprises apart from box:

The second smooth diplexer, for the light signal receiving is carried out to separation, when the uplink optical signal receiving from 1:N coupler, export this uplink optical signal to second multiplexing demultiplexing device, when the downlink optical signal receiving from OA, export this downlink optical signal to 1:N coupler.

28. length as claimed in claim 27, apart from box, is characterized in that, described the first smooth diplexer is wave-division multiplexer filter or optical circulator; The second smooth diplexer is wave-division multiplexer filter or optical circulator.

29. length as described in as arbitrary in claim 16-25, apart from box, is characterized in that, described length is applied in the passive optical network of Wave time division mixed multiplexing apart from box.

30. 1 kinds utilize length described in claim 5 apart from box the processing method to uplink optical signal, it is characterized in that, described method comprises:

1:N coupler, when receiving the uplink optical signal of each optical splitter, is exported to photoelectricity optical repeater after the uplink optical signal of each optical splitter is coupled as to a road;

31. 1 kinds utilize length described in claim 5 apart from box the processing method to downlink optical signal, it is characterized in that, described method comprises:

OA, when the downlink optical signal receiving from optical line terminal OLT, amplifies described downlink optical signal and exports to 1:N coupler;

32. 1 kinds utilize length described in claim 16 apart from box the processing method to uplink optical signal, it is characterized in that, described method comprises:

33. 1 kinds utilize length described in claim 16 apart from box the processing method to downlink optical signal, it is characterized in that, described method comprises: