CN102025421A - Gigabit broadband isolation pseudo-synchronous digital hierarchical (PDH) optical transmitter and receiver - Google Patents
Gigabit broadband isolation pseudo-synchronous digital hierarchical (PDH) optical transmitter and receiver Download PDFInfo
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Abstract
The invention relates to a gigabit broadband isolation pseudo-synchronous digital hierarchical (PDH) optical transmitter and receiver, which consists of a cabinet and an optical transmitter and receiver circuit in the cabinet, wherein the optical transmitter and receiver circuit comprises a field programmable gate array (FPGA) core module; the FPGA core module is connected with a SerDes module, a key control module, a module for the drive and level conversion of the first to 16th paths of E1, a 1,000 M Ethernet controller and a 100 M Ethernet controller respectively; the SerDes module is also connected with a fiber interface by a photoelectric conversion module; the module for the drive and level conversion of the first to 16th paths of E1, the 1,000 M Ethernet controller and the 100 M Ethernet controller are connected with 1-16 paths of E1 interfaces, a 1,000 M Ethernet interface and a 100 M Ethernet interface by isolation transformers respectively; and a power conversion module is connected with each module to supply working power to the modules. The gigabit broadband isolation PDH optical transmitter and receiver has a rational design, fully utilizes optical fiber resources, solves the problems of insufficient bandwidth and network data security of the conventional Ethernet, well realizes the fiber optic communication function of combining together E1 data channels and two paths of Ethernet data channels, avoids the waste of communication resources and saves the communication cost.
Description
Technical field
The invention belongs to fiber optic communication field equipment, especially a kind of PDH optical transceiver of gigabit broadband isolation.
Background technology
Generally adopt E1 communication standard (30 tunnel pulse-code modulation PCM in Europe) in the Communication in China net, the PDH optical transceiver with E1 interface has obtained using widely in communication network.The PDH optical transceiver has plurality of advantages such as access is simple, cost is low, easy to maintenance, uses in a large number in many communication networks such as mobile, UNICOM, public security, electric power, railway.Traditional PD H optical transceiver generally provides 1～16 road E1 interface, 1～4 100M Ethernet interface (total bandwidth is 100Mbps only), development along with society, particularly a lot of service needed IP carryings of some private network clients, popularize or the like such as video conference, high-definition image monitoring, digital office network, so the transmission of the Ethernet of 100Mbps bandwidth is obviously not enough, fights for the situation of bandwidth, network congestion between appearance business to a certain extent.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of PDH optical transceiver of gigabit broadband isolation is provided, realized realizing on the light path transfer function of 16 road E1,1 road 1000M Ethernet, 1 road 100M Ethernet, guarantee that simultaneously the two-way ethernet channel is linear speed transmission and isolation fully physically, thereby brought bigger Ethernet bandwidth and the fail safe of Geng Gao.
The present invention solves its technical problem and takes following technical scheme to realize:
A kind of PDH optical transceiver of gigabit broadband isolation, constitute by casing and inner optical transceiver circuit thereof, described optical transceiver circuit comprises the fpga core module, power transfer module, the SerDes module, photoelectric conversion module, the button control module, 1-16 road E1 drives and the level translation module, the 1000M ethernet controller, the 100M ethernet controller, the FGPA nucleus module respectively with the SerDes module, the button control module, 1-16 road E1 drives and the level translation module, the 1000M ethernet controller, the 100M ethernet controller is connected, the SerDes module also is connected with optical fiber interface by photoelectric conversion module, 1-16 road E1 drives and the level translation module, 1000M ethernet controller and 100M ethernet controller are respectively by isolating transformer and 1-16 road E1 interface, the 1000M Ethernet interface is connected with the 100M Ethernet interface, and power transfer module connects each module provides working power.
And described fpga core module comprises:
Send processing unit, finish collection and justification 16 road E1,1000M Ethernet, 100M Ethernet data, and with the transmission of packing of these data;
Receive processing unit, finish the extraction frame synchronization information, separate 16 road E1,1000M Ethernet, 100M Ethernet data, and rebuild the E1 clock;
The monitoring management module is finished the real-time monitoring and the indication of all kinds of alarms and state, and by SMI bus response webmaster module.
And, described transmission processing unit comprises GMII_rxbuf module, HDB3_DC module, Code_Up module, Framer module, the 1000M netting index is according to entering the Framer module through the GMII_rxbuf module, the 100M netting index is according to directly entering the Framer module, 16 road E1 data HDB3_DC module, the Code_Up module by separately respectively enter the Framer module, by exporting after the Framer resume module; Described reception processing unit comprises Code_Re module, HDB3_C module, GMII_txbuf module, De_Framer module, the isolated 1000M netting index of De_Framer module is according to exporting through the GMII_txbuf module, the isolated 100M netting index of De_Framer module is according to directly output, and isolated 16 road E1 data of De_Framer module are exported by separately Code_Re module, HDB3_C module respectively.
And described fpga core module also connects a network management module, and this network management module is connected with network management interface by isolating transformer, and described network management module is connected and composed by microprocessor, network chip and memory.
And this network management module also connects a network management system running LED.
And described fpga core module also connects alarm and state indicating module, and this alarm and state indicating module output are connected with light path alarm indicator, power supply indicator and E1 interface indicator.
And described button control module comprises that Ethernet interface reset button, the pseudo-alarm shield button of idle E1 and basis/far-end E1 interface operating state show selector button.
And described 1000M ethernet controller, 100M ethernet controller, network management module also connect working station indicator separately respectively.
And; described power transfer module is connected and composed successively by surge and overcurrent protection module, external power supply converter unit, power supply low pressure converter unit; external AC power supply and DC power supply are connected on surge and the overcurrent protection module by AC power interface and DC power supply interface respectively, and power supply low pressure converter unit output power supply is the optical transceiver circuit supply.
And the output of described surge and overcurrent protection module also connects the whether RPD monitoring modular of power down of a monitoring external power supply, and the output of this RPD monitoring modular is connected with the fpga core module.
Advantage of the present invention and good effect are:
1, this PDH optical transceiver adopts the core of fpga core processing module as the optical transceiver circuit, realized that encoding and decoding, alarm-monitor processing, the clock recovery in encoding and decoding, Ethernet GMII (Gigabit Medium Independent Interface gigabit Media Independent Interface) and MII (the Media Independent Interface Media Independent Interface) processing of data, the justification of E1, the line side of E1, the branch of data insert/multiplexing function, for the user provides 16 road E1,1 road 1000M Ethernet interface, 1 road 100M Ethernet interface function.The two-way ethernet channel is the linear speed transmission, has not only solved the problem of bandwidth deficiency, and simultaneously, 1000M and 100M Ethernet interface are isolated physically fully, have also solved the safety problem of network data.
2, this PDH optical transceiver has higher flexibility and cost advantage based on the design of FPGA, greatly reduces device cost.
3, this PDH optical transceiver is provided with network management module, for the user provides perfect remote maintenance functions, by remote maintenance functions not only query warning and state in real time, more can realize the device software online upgrading of (comprising FPGA program, ARM program) is effectively reduced maintenance cost.
4, this PDH optical transceiver is provided with the RPD monitoring modular, realized the monitoring of far-end external power supply, thereby makes equipment possess the fine monitoring function of power down/fall.
5, this PDH optical transceiver is provided with various alarm indicators and working station indicator, can be well understood to the operating state of optical transceiver by this indicator light, is convenient to administrative staff's monitoring and safeguards.
6, the present invention is reasonable in design, utilized fiber resource fully, existing Ethernet bandwidth deficiency and network data security problem have been solved, realized well E1 data channel and two-way Ethernet data passage combined and carried out the optical fiber communication function, avoid the waste of the communication resource, saved communications cost.
Description of drawings
Fig. 1 is a casing front panel schematic diagram of the present invention;
Fig. 2 is a casing rear board schematic diagram of the present invention;
Fig. 3 is an optical transceiver circuit block diagram of the present invention;
Fig. 4 is the functional-block diagram of fpga core module of the present invention.
Embodiment
Below in conjunction with accompanying drawing the embodiment of the invention is further described:
A kind of PDH optical transceiver of gigabit broadband isolation is made of casing 1 and inner optical transceiver circuit thereof.As shown in Figure 1, on the front panel of casing, provide network management interface 2,1000M Ethernet interface 7,100M Ethernet interface 8, each interface working station indicator 6 (comprising light path alarm indicator, power supply indicator, E1 interface indicator, Ethernet interface indicator light, network management system run indicator), Ethernet interface reset button 3, the pseudo-alarm shield button 4 of idle E1, basis/far-end E1 interface operating state to show selector button 5; An AC power input interface 9, DC power supply input interface 10, mains switch 11,1-16 road E1 interface 12, an optical fiber interface 13 are provided on the rear board of casing.Various interface on the casing, button, indicator light, mains switch etc. all are connected on the optical transceiver circuit of casing inside, are finished the branch of each road signal and optical fiber by the optical transceiver circuit and insert/multiplexing function.
The optical transceiver circuit of casing inside, as shown in Figure 2, comprise that power transfer module, RPD monitoring modular, SerDes module, photoelectric conversion module, button control module, alarm and state indicating module, 1-16 road E1 drive and level translation module, 1000M ethernet controller, 100M ethernet controller, network management module, isolating transformer, various working station indicator and fpga core module.Power transfer module is connected with each module provides working power for each module, the FGPA nucleus module as the core of optical transceiver circuit respectively with the SerDes module, the RPD monitoring modular, the button control module, alarm and state indicating module, 1-16 road E1 drives and the level translation module, the 1000M ethernet controller, the 100M ethernet controller is connected with network management module, the SerDes module also is connected with optical fiber interface by photoelectric conversion module, 1-16 road E1 drives and the level translation module is connected with 1-16 road E1 interface by isolating transformer, the 1000M ethernet controller, the 100M ethernet controller, network management module is respectively by isolating transformer and 1000M Ethernet interface, the 100M Ethernet interface, network management interface is connected, in order to show the operating state of each module, the 1000M ethernet controller, the 100M ethernet controller, network management module also connects working station indicator separately respectively, and alarm and state indicating module connect the light path alarm indicator respectively, power supply indicator, the E1 interface indicator.Each module to optical transceiver is further described below:
Power transfer module is connected and composed successively by surge and overcurrent protection module, external power supply converter unit, power supply low pressure converter unit, connect the RPD monitoring module monitors carries out down Monitor Unit to external AC power on the one hand after exchanging input interface, surge and overcurrent protection module, be connected to the external power supply converter unit on the other hand and carry out power conversion, then through mains switch be connected to power supply low pressure converter unit output 3.3V, 12V, 2.5V, the 5.0V direct current provides working power for other modules in the optical transceiver circuit; External 36～72V DC power supply is connected to the external power supply converter unit through surge and overcurrent protection module and carries out power conversion; then through mains switch be connected to power supply low pressure converter unit output 3.3V, 12V, 2.5V, the 5.0V direct current provides working power for other modules in the optical transceiver circuit; wherein, power supply low pressure converter unit uses AP1510 chip and LM1117 chip to finish the conversion of all types of voltages.
The RPD monitoring modular is finished the external AC power supply monitoring function of power down whether, uses TLP521 to realize the Signal Spacing function in the RPD monitoring modular.
Photoelectric conversion module uses Shenzhen to think to reach the SSFP3151-13-125 optical module of photoelectricity, finishes the light/electric translation function of data flow.
The SerDes module is used TLK1221 low-power consumption single channel gigabit Ethernet serializer/de-serializers chip, finishes the serial/parallel conversion and the clock restore funcitons of data flow.
The button control module comprises that Ethernet interface reset button, the pseudo-alarm shield button of idle E1 and basis/far-end E1 interface operating state show selector button, each button uses keyboard switch, finishes the function that Ethernet interface resets, shields the pseudo-alarm of E1, the selection of E1 indicator light demonstration basis/far-end.
Alarm and state indicating module use the 74HC595 chip, finish the serial/parallel conversion of warning information and the function of driving LED indicator light.
1-16 road E1 drives and the level translation module is connected and composed by MC3486,74LS240 chip and transformer 40ST1065, level translation and the output of finishing the E1 signal drive function, and finish Signal Spacing and impedance conversion in conjunction with isolating transformer, isolating transformer adopts the H5007 transformer.
The 1000M ethernet controller uses the VSC8641 chip to realize the transceiver function of 1000M Ethernet, one side of 1000M ethernet controller is connected with the fpga core module by gmii interface, opposite side connects RJ45 by isolating transformer, and isolating transformer adopts the H5007 transformer.
The 100M ethernet controller uses the RTL8305SB chip to realize the transceiver function of 100M Ethernet, one side of 100M ethernet controller is connected with FPGA by the MII interface, opposite side connects RJ45 by isolating transformer, and isolating transformer uses the SH1102 transformer.
Network management module is connected and composed by Samsung S3C4510B microprocessor, HY57V641620HG memory chip, SST39VF1601-70-4C-EKE memory chip and IP101A network chip, realization is to the monitoring and the management of system running state, be connected the read-write operation of finishing register in the FPGA by the SMI bus with the FGPA nucleus module, be connected the management of finishing user WEB mode with user PC by Ethernet interface and insert.
The fpga core module has been used the LFXP2-5E-5QN208C of Lattice company chip, and the system that adopts the Verliog hardware description language to finish this optical transceiver circuit controls.The fpga core module mainly comprises the transmission processing unit, receive processing unit, the monitoring management module, as shown in Figure 3, described transmission processing unit comprises the GMII_rxbuf module, the HDB3_DC module, the Code_Up module, the Framer module, the 1000M netting index is according to entering the Framer module through the GMII_rxbuf module, the 100M netting index is according to directly entering the Framer module, 16 road E1 are according to the HDB3_DC module of passing through respectively separately, the Code_Up module enters the Framer module, by exporting after the Framer resume module, sending processing unit mainly finishes 16 road E1, the 1000M Ethernet, the collection of 100M Ethernet data and justification, and with the transmission of packing of these data; Described reception processing unit comprises Code_Re module, HDB3_C module, GMII_txbuf module, De_Framer module, the isolated 1000M netting index of De_Framer module is according to exporting through the GMII_txbuf module, the isolated 100M netting index of De_Framer module is according to directly output, isolated 16 road E1 data of De_Framer module are exported by separately Code_Re module, HDB3_C module respectively, receive processing unit and mainly finish the extraction frame synchronization information, separate 16 road E1,1000M Ethernet, 100M Ethernet data, and rebuild the E1 clock; The monitoring management module is finished the real-time monitoring and the indication of all kinds of alarms and state, and passes through the order of SMI bus response to network administration module.Below nine submodules in the fpga core module are described respectively:
1.GMII_rxbuf module:
To be synchronized with PHY output clock GMII data RxDV, RxD7～RxD0 (totally 9 bits) is synchronized to the equipment master clock.Core is doubleclocking FIFO and at the Ethernet bag, special read-write control logic.
2.HDB3_DC module:
The HDB3 decoder is converted to original information stream with the HDB3 sign indicating number, extracts the E1 line clock simultaneously.
3.Code_Up module:
The E1 data of each road 2.048M are carried out justification, it is synchronized on the system clock.The core of this module is the insertion logic that doubleclocking FIFO, FIFO read-write control and code check are adjusted the position.
4.Framer module:
With adjusted 16 road E1 data of code check, 100M Ethernet data and gigabit Ethernet data are converted into parallel data stream by certain frame structure packing.
5.De_Framer module:
The parallel data stream that the serdes chip recovers is separated frame, isolate 16 road E1 high-speeld code-flow data, 10/100M Ethernet data and gigabit Ethernet data.It is the inverse process of Framer.
6.Code_Re module:
Isolate the insertion position in the far-end E1 high-speeld code-flow, recover far-end E1 initial data and original clock.
7.HDB3_C module
The original E1 data of the far-end that recovers are done the HDB3 coding.
8.GMII_txbuf module
With the gigabit ethernet signal buffering output that recovers.
9. monitoring management module
Managing apparatus state, display alarm information etc.
The course of work of the present invention is as follows:
The processing procedure of transmitter side is, it at first is data acquisition, comprise that the mode that cushions by frame is to asynchronous gigabit Ethernet data acquisition, adjust mode to the collection of 16 road asynchronous E1 data and the synchronous acquisition of 100M Ethernet data by code check, the use of frame buffering and code check adjustment technology has guaranteed multiplexing the finishing smoothly of multi-path asynchronous data sync.Secondly, the bandwidth constraints requirement of optical fiber transport channel 1.25Gbits must be carried out lossless compress to partial data.Use " photographic process " that gigabit Ethernet gmii interface TxEN signal is carried out data compression herein.Adjusted 16 road E1 packing data transmission of gigabit ether data, 100M Ethernet data and code check after using the mode of frame synchronization to compress simultaneously.Data after the packing are given SerDes module, are responsible for data serializing by the SerDes module, and then give photoelectric conversion module, by optical fiber interface the signal of telecommunication are changed into optical signal transmission to far-end at last.
The processing procedure of receiver side is, at first light signal is changed into the signal of telecommunication by photoelectric conversion module, give the SerDes module then and finish string and conversion, and the data of line output are given the fpga core resume module, clock recovery ability by the serdes chip, from the extracting data frame synchronization information that recovers, separate gigabit Ethernet, 100M Ethernet and 16 road E1 data, utilize " Stop watch method " to recover gigabit TxEN signal then, peel off the insertion position in the E1 high-speeld code-flow simultaneously, rebuild E1 original data stream and clock.Isolated gigabit ethernet signal is given the output of 1000M ethernet controller through buffering, and the 100M ethernet signal is given 100M Ethernet PHY output, and 16 road E1 data are given E1 driving and the output of level translation module.
It is emphasized that; embodiment of the present invention is illustrative; rather than it is determinate; therefore the present invention is not limited to the embodiment described in the embodiment; every other execution modes that drawn by those skilled in the art's technical scheme according to the present invention belong to the scope of protection of the invention equally.
Claims (10)
1. the PDH optical transceiver of a gigabit broadband isolation, constitute by casing and inner optical transceiver circuit thereof, it is characterized in that: described optical transceiver circuit comprises the fpga core module, power transfer module, the SerDes module, photoelectric conversion module, the button control module, 1-16 road E1 drives and the level translation module, the 1000M ethernet controller, the 100M ethernet controller, the FGPA nucleus module respectively with the SerDes module, the button control module, 1-16 road E1 drives and the level translation module, the 1000M ethernet controller, the 100M ethernet controller is connected, the SerDes module also is connected with optical fiber interface by photoelectric conversion module, 1-16 road E1 drives and the level translation module, 1000M ethernet controller and 100M ethernet controller are respectively by isolating transformer and 1-16 road E1 interface, the 1000M Ethernet interface is connected with the 100M Ethernet interface, and power transfer module connects each module provides working power.
2. the PDH optical transceiver of gigabit broadband isolation according to claim 1 is characterized in that: described fpga core module comprises:
Send processing unit, finish collection and justification 16 road E1,1000M Ethernet, 100M Ethernet data, and with the transmission of packing of these data;
Receive processing unit, finish the extraction frame synchronization information, separate 16 road E1,1000M Ethernet, 100M Ethernet data, and rebuild the E1 clock;
The monitoring management module is finished the real-time monitoring and the indication of all kinds of alarms and state, and by SMI bus response webmaster module.
3. the PDH optical transceiver of gigabit broadband isolation according to claim 2, it is characterized in that: described transmission processing unit comprises GMII_rxbuf module, HDB3_DC module, Code_Up module, Framer module, the 1000M netting index is according to entering the Framer module through the GMII_rxbuf module, the 100M netting index is according to directly entering the Framer module, 16 road E1 data HDB3_DC module, the Code_Up by are separately respectively gone into the Framer module, by exporting after the Framer resume module; Described reception processing unit comprises Code_Re module, HDB3_C module, GMII_txbuf module, De_Framer module, the isolated 1000M netting index of De_Framer module is according to exporting through the GMII_txbuf module, the isolated 100M netting index of De_Framer module is according to directly output, and isolated 16 road E1 data of De_Framer module are exported by separately Code_Re module, HDB3_C module respectively.
4. the PDH optical transceiver of gigabit broadband isolation according to claim 1, it is characterized in that: described fpga core module also connects a network management module, this network management module is connected with network management interface by isolating transformer, and described network management module is connected and composed by microprocessor, network chip and memory.
5. the PDH optical transceiver of gigabit broadband isolation according to claim 4 is characterized in that: this network management module also connects a network management system running LED.
6. the PDH optical transceiver of gigabit broadband isolation according to claim 1 and 2, it is characterized in that: described fpga core module also connects alarm and state indicating module, and this alarm and state indicating module output are connected with light path alarm indicator, power supply indicator and E1 interface indicator.
7. the PDH optical transceiver of gigabit broadband isolation according to claim 1 is characterized in that: described button control module comprises that Ethernet interface reset button, the pseudo-alarm shield button of idle E1 and basis/far-end E1 interface operating state show selector button.
8. the PDH optical transceiver of gigabit broadband isolation according to claim 1 is characterized in that: described 1000M ethernet controller, 100M ethernet controller, network management module also connect working station indicator separately respectively.
9. the PDH optical transceiver of gigabit broadband isolation according to claim 1; it is characterized in that: described power transfer module is connected and composed successively by surge and overcurrent protection module, external power supply converter unit, power supply low pressure converter unit; external AC power supply and DC power supply are connected on surge and the overcurrent protection module by AC power interface and DC power supply interface respectively, and power supply low pressure converter unit output power supply is the optical transceiver circuit supply.
10. the PDH optical transceiver of gigabit broadband isolation according to claim 9; it is characterized in that: the output of described surge and overcurrent protection module also connects the whether RPD monitoring modular of power down of a monitoring external power supply, and the output of this RPD monitoring modular is connected with the fpga core module.
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| CN102227102A (en) * | 2011-06-23 | 2011-10-26 | 天津光电通信技术有限公司 | Large capacity information selection and gathering system of SDH |
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| CN103595487A (en) * | 2012-08-14 | 2014-02-19 | 成都思迈科技发展有限责任公司 | A modularized network type PDH optical transceiver |
| CN103312417A (en) * | 2013-06-14 | 2013-09-18 | 成都思迈科技发展有限责任公司 | Multiport RS232/485 data optical transceiver |
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| CN103647602B (en) * | 2013-11-15 | 2016-03-16 | 天津天地伟业数码科技有限公司 | Fiber signal transmission fault automatic identification method |
| CN107346990A (en) * | 2016-08-12 | 2017-11-14 | 中国移动通信集团海南有限公司 | A kind of optical transmitter and receiver fault monitoring method and device |
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Application publication date: 20110420 |