CN204068982U - A kind of optical amplifier apparatus being applied to gigabit ethernet passive optical network - Google Patents
A kind of optical amplifier apparatus being applied to gigabit ethernet passive optical network Download PDFInfo
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- CN204068982U CN204068982U CN201420606664.8U CN201420606664U CN204068982U CN 204068982 U CN204068982 U CN 204068982U CN 201420606664 U CN201420606664 U CN 201420606664U CN 204068982 U CN204068982 U CN 204068982U
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Abstract
The utility model discloses a kind of optical amplifier apparatus being applied to gigabit ethernet passive optical network, it is characterized in that comprising: the laser of optical line terminal OLT, the laser of EPON node ONU, the first deserializer, the second string also converter and controller; The serial electric signal that the laser that first deserializer receives optical line terminal OLT sends, and be converted to parallel electric signal; Controller extracts the Gate message in parallel electric signal, and obtains opening time window; Second string sends to the laser of EPON node ONU be converted to the light signal of amplification and send to EPON node ONU at opening time window after also the parallel signal that controller sends is converted to serial signal by converter, thus realizes the burst mode transmission of light signal.The utility model can be placed on the optional position in PON system, and not by the restriction of topology, process is simultaneously deep into protocol section, can accomplish the monitoring of signal quality simultaneously, and the analysis of communications content.
Description
Technical field
The utility model relates to the optical signal amplifying large equipment of optical communication field, specifically a kind of optical amplifier apparatus being applied to gigabit ethernet passive optical network.
Background technology
In GEPON system, due to the restriction of optical power budget, within causing the transmission range of GEPON system to be limited in 20KM, ONU upstream data is after OEO-GEPON equipment, the laser connecting OLT Side can only could send light signal at the up window of specific ONU, otherwise have 2 kinds of consequences: 1, disturb other ONU uplink optical signals; 2, do not detect by OLT RSSI.OEO-GEPON equipment the Gate scope of laser belonging to ONU of control OLT Side must can open light signal.
OEO-GEPON equipment is used for realizing optical regeneration in GEPON network, improves the optical power budget of whole GEPON network.3 effects can be played in actual applications:
1. increase the coverage distance (limiting by OLT RTT-MAX and RTT-Drift) of GEPON network;
2. increase splitting ratio, increase ONU and access quantity;
3. change the wavelength of fiber middle light signal in GEPON network, realizing multiple independently GEPON can transmit in same optical fiber, improves the utilance of optical fiber.
But existing equipment on market, can only carry out the amplification of continuous light, determines OEO-GEPON equipment and can only be placed on main line, can not be placed in branch, cause the restriction of a lot of application aspect.The regeneration of physics light signal can only be accomplished simultaneously, cannot process logical signal.
Utility model content
The utility model is the weak point solving the existence of above-mentioned prior art, a kind of optical amplifier apparatus being applied to gigabit ethernet passive optical network is proposed, the optional position in PON system can be placed on, not by the restriction of topology, process is simultaneously deep into protocol section, the monitoring of signal quality can be accomplished simultaneously, and the analysis of communications content.
The utility model is that technical solution problem adopts following technical scheme:
A kind of optical amplifier apparatus being applied to gigabit ethernet passive optical network of the utility model, described gigabit ethernet passive optical network optical line terminal OLT is connected by optical fiber the optical signal transmission process that realizes encrypting with EPON node ONU through optical splitter, and its design feature is that the composition of described optical amplifier apparatus comprises: the laser of optical line terminal OLT, the laser of EPON node ONU, the first deserializer, the second string converter and controller;
The laser of described optical line terminal OLT receives the light signal that optical line terminal OLT sends by described optical fiber, and sends to described first deserializer after described light signal is converted to serial electric signal; Described first deserializer passes to described controller after described serial electric signal is converted to parallel electric signal;
Described controller extracts the Gate message in described parallel electric signal, and adds that the RTT time delay between described optical amplifier apparatus to EPON node ONU calculates the opening time window of the laser obtaining described EPON node ONU according to the time window in described Gate message; Described parallel electric signal is sent to described second string and converter by described controller simultaneously;
Described second string converter sends to the laser of described EPON node ONU after described parallel signal is converted to serial signal;
Described serial signal is converted to the light signal of amplification and sends to described EPON node ONU at the opening time window of the laser of described EPON node ONU by the laser of described EPON node ONU, thus realizes the burst mode transmission of light signal.
The design feature that the utility model is applied to the optical amplifier apparatus of gigabit ethernet passive optical network is also:
Described optical amplifier apparatus can be arranged on the optional position between described optical line terminal OLT and EPON node ONU.
The laser of described optical line terminal OLT and the laser of EPON node ONU all adopt SFP SFP laser.
Described controller obtains key and transfer to outside port after being decrypted by described parallel electric signal in optical signal transmission process, thus monitors the communication between the laser of described optical line terminal OLT and EPON node ONU.
Compared with the prior art, the beneficial effects of the utility model are embodied in:
1, the utility model provides a kind of new OEO-GEPON equipment, by regenerating and analyzing GEPON light signal, improves the transmission range of GEPON system to 80km.
2, the utility model is by detecting Gate information, regenerates GEPON signal, and perfectly recovering the up burst light signal of ONU, is the Core Solution of this equipment, can make the arbitrary part that OEO-GEPON equipment prevents in fiber distribution.
Accompanying drawing explanation
Fig. 1 is the utility model structured flowchart;
Fig. 2 is the utility model OEO-GEPON laser turn-on time schematic diagram.
Embodiment
In the present embodiment, gigabit ethernet passive optical network optical line terminal OLT is connected by optical fiber the optical signal transmission process that realizes encrypting with EPON node ONU through optical splitter, as shown in Figure 1, a kind of optical amplifier apparatus being applied to gigabit ethernet passive optical network can be arranged on the optional position between optical line terminal OLT and EPON node ONU, and its composition comprises: the laser of optical line terminal OLT, the laser of EPON node ONU, the first deserializer, the second string also converter and controller; Wherein, the laser of optical line terminal OLT and the laser of EPON node ONU all adopt SFP SFP laser.
The laser of optical line terminal OLT receives the light signal that optical line terminal OLT sends by optical fiber, and sends to the first deserializer after light signal is converted to serial electric signal; First deserializer passes to controller after serial electric signal is converted to parallel electric signal, makes serial high speed signal change the parallel signal of low velocity into, facilitates controller to process information wherein;
Controller extracts the Gate message in parallel electric signal, and adds that the RTT time delay between optical amplifier apparatus to EPON node ONU calculates the opening time window of the laser obtaining EPON node ONU according to the time window in Gate message; With Time Controller, parallel electric signal is sent to the second string and converter;
The Gate information of each ONU is stored in controller.Buffer memory 2K Gate information is supported in current design, and the foundation of this quantity is the length of maximum transmitted time delay at whole GEPON network and minimum Gate.In order to the accurate Gate window at this node of OEO-GEPON equipment accurately can be controlled, the LocalTimer that the synchronous OLT of controller issues, and the ONU of each rear class is found range.
As shown in Figure 2, obtain in the Gate that T3 can be issued by OLT, the RTT time of T2+T2 and OEO-GEPON and ONU.This RTT can be subtracted each other by the LocalTimer value of the Localtimer information in the up MPCPDU of ONU and OEO-GEPON this locality and obtains.Namely the opening time of OEO-GEPON laser is the Starttime+RTT of the GatePDU that the OLT received issues.
In order to obtain required information, controller catches all bags of ONU and OLT, comprises the data of OLT down going channel encryption.So controller also will support decryption capabilities, in GEPON version, only support Triple-Churning deciphering.In order to realize deciphering, controller also must store 2 keys of each ONU, and current controller can safeguard the key information of 256 ONU.Controller obtains key and transfer to outside port after being decrypted by parallel electric signal in optical signal transmission process, thus monitors the communication between the laser of optical line terminal OLT and EPON node ONU.
Second string converter sends to the laser of EPON node ONU after parallel signal is converted to serial signal, completes the transition process of low speed signal to high speed signal;
Serial signal is converted to the light signal of amplification and sends to EPON node ONU at the opening time window of the laser of EPON node ONU by the laser of EPON node ONU, thus realizes the burst mode transmission of light signal.Like this would not continuous luminous, disturb the light signal of other upgoing O NU.
Meanwhile, the message information due to Direct Analysis in GEPON signal, directly can separate Content of Communication, be submitted to service port, so that the content of analyzing communication transmission, conveniently monitors transmission information.
Claims (4)
1. one kind is applied to the optical amplifier apparatus of gigabit ethernet passive optical network, described gigabit ethernet passive optical network optical line terminal OLT is connected by optical fiber the optical signal transmission process that realizes encrypting with EPON node ONU through optical splitter, it is characterized in that the composition of described optical amplifier apparatus comprises: the laser of optical line terminal OLT, the laser of EPON node ONU, the first deserializer, the second string converter and controller;
The laser of described optical line terminal OLT receives the light signal that optical line terminal OLT sends by described optical fiber, and sends to described first deserializer after described light signal is converted to serial electric signal; Described first deserializer passes to described controller after described serial electric signal is converted to parallel electric signal;
Described controller extracts the Gate message in described parallel electric signal, and adds that the RTT time delay between described optical amplifier apparatus to EPON node ONU calculates the opening time window of the laser obtaining described EPON node ONU according to the time window in described Gate message; Described parallel electric signal is sent to described second string and converter by described controller simultaneously;
Described second string converter sends to the laser of described EPON node ONU after described parallel signal is converted to serial signal;
Described serial signal is converted to the light signal of amplification and sends to described EPON node ONU at the opening time window of the laser of described EPON node ONU by the laser of described EPON node ONU, thus realizes the burst mode transmission of light signal.
2. the optical amplifier apparatus being applied to gigabit ethernet passive optical network according to claim 1, is characterized in that: described optical amplifier apparatus can be arranged on the optional position between described optical line terminal OLT and EPON node ONU.
3. the optical amplifier apparatus being applied to gigabit ethernet passive optical network according to claim 1, is characterized in that: the laser of described optical line terminal OLT and the laser of EPON node ONU all adopt SFP SFP laser.
4. the optical amplifier apparatus being applied to gigabit ethernet passive optical network according to claim 1, it is characterized in that: described controller obtains key and transfer to outside port after being decrypted by described parallel electric signal in optical signal transmission process, thus monitor the communication between the laser of described optical line terminal OLT and EPON node ONU.
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| CN201420606664.8U CN204068982U (en) | 2014-10-20 | 2014-10-20 | A kind of optical amplifier apparatus being applied to gigabit ethernet passive optical network |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104270199B (en) * | 2014-10-20 | 2017-01-18 | 国家电网公司 | Optical amplification equipment applied to gigabit Ethernet passive optical network |
| CN112987628A (en) * | 2021-05-12 | 2021-06-18 | 南京斯酷环境科技有限公司 | Comprehensive monitoring backbone network interface communication module and monitoring method thereof |
-
2014
- 2014-10-20 CN CN201420606664.8U patent/CN204068982U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104270199B (en) * | 2014-10-20 | 2017-01-18 | 国家电网公司 | Optical amplification equipment applied to gigabit Ethernet passive optical network |
| CN112987628A (en) * | 2021-05-12 | 2021-06-18 | 南京斯酷环境科技有限公司 | Comprehensive monitoring backbone network interface communication module and monitoring method thereof |
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