CN1428961A

CN1428961A - Method of optical wavelength converter capable of fleribly setting speed rate and its equipment

Info

Publication number: CN1428961A
Application number: CN01145385A
Authority: CN
Inventors: 雒宏礼; 秦永兵
Original assignee: Shanghai No 2 Research Institute of ZTE Corp
Current assignee: CHINA TECHNOLOGY EXCHANGE Co Ltd; State Grid Beijing Electric Power Co Ltd; Beijing Borui Xianglun Technology Development Co Ltd
Priority date: 2001-12-27
Filing date: 2001-12-27
Publication date: 2003-07-09
Anticipated expiration: 2021-12-27
Also published as: CN1275412C

Abstract

The present invention relates to a method of flexible configuration of rate of optical wavelength converter and its equipment, and relates to service rate conviguration of optical wavelength converter in clense wave division multiplexing system. It includes single board portion and optical transceiving module, in which the single board portion includes CPU circuit, AD and DA circuits, EPGA circuit and SDH overhead processing circuit, and the function of single board portion includes: collecting the performance index of input and outupt light of optical transceiving module, up-reporting the monitored performance index to network management system, at the same time receiving and processing command given out by network management system.

Description

But a kind of method and apparatus of optical transponder unit of speed flexible configuration

Technical field

The present invention relates to the technology of All Optical Communication Networks field, especially relates to the service rate allocation problem of the optical transponder unit in the dense wavelength division multiplexing system.

Background technology

In dense wavelength division multiplexing system, the major function of optical transponder unit is to adopt light/electricity/light conversion regime will satisfy the SDH conversion of signals of any producer of G.957 advising requirement for satisfying the light signal that G.692 requires, promptly the light signal of the SDH optical transceiver being come by the optical transponder unit transceiver module converts the signal of telecommunication to, by the optical transponder unit transceiver module electrical signal conversion is the satisfied light signal that G.692 requires again, simultaneously the relevant monitor message of transceiver module is reported webmaster.By the light signal retransmission unit, wave-length coverage is 1290nm-1570nm to the light signal business of input pellucidly, and the optical channel wavelength of output is to satisfy the G.692 specific wavelength of standard of ITU-T.

Because the speed difference of the business of dense wavelength division multiplexing system delivery is divided into STM (synchronous transfer mode)-1, STM-4, business such as STM-16 and gigabit Ethernet, the quantity of optical transponder unit is a lot.For example, in 32 wave systems systems, need 32, add 32 of relays and receiving terminal 32 96 optical transponder units altogether at transmitting terminal.If different business is with different optical transponder units, the kind quantity of the optical transponder unit veneer that needs can be multiplied, so just there is following shortcoming: at first, dispose dumb, transmission is different when professional in same system, need the optical transponder unit with different business, this need on-the-spotly change hardware, increases the work in a lot of installations and the debugging; And the optical transponder unit disunity of different business, kind quantity is big, but function class is seemingly, causes a large amount of repeatability to produce; Because a large amount of repeatability are produced, and have increased equipment cost.

Summary of the invention

Technical problem to be solved by this invention is to overcome the inflexible shortcoming of configuration in the prior art, and the optical transponder unit veneer that causes thus is of a great variety, thereby give production and install the inconvenience that brings, but a kind of optical transponder unit method and apparatus of speed flexible configuration is provided.

The device of optical transponder unit of the present invention comprises veneer part and optical transceiver module part; Wherein, veneer partly comprises the central processing unit circuit, digital-to-analogue (AD) and modulus (DA) circuit, field programmable device (FPGA) circuit and SDH overhead processing circuit; The function of veneer part is the performance index of gathering the input and output light of optical transceiver module, and the performance index that monitor are reported webmaster, receives and handle the order that webmaster issues simultaneously; Wherein the central processing unit circuit sends order, manages and controls whole veneer, and finish the communication of calcaneus rete pipe; AD and DA circuit will be received the performance index monitoring voltage signal of gathering optical transceiver module after the order of central processing unit, offer central processing unit by the AD conversion, and back to optical transceiver module the data of central processing unit transmission by the DA conversion, the interface of AD and DA circuit and central processing unit is a data and address bus; Do the logic that the central processing unit operation needs in the FPGA circuit, comprising address decoding, data latching, clock division sum counter; The interface of FPGA and central processing unit is a data/address bus, address bus, clock line and control line; SDH overhead processing circuit therefrom extracts the overhead byte of SDH from receiving SDH data and the clock signal that optical transceiver module extracts, and SDH overhead processing circuit is a data/address bus with the interface of FPGA circuit;

Optical transceiver module comprises: photodetection and amplifying circuit, data and clock recovery circuitry, modulated luminescence circuit; G.957 photodetector in photodetection and the amplifying circuit meets that the light of standard changes the signal of telecommunication into to what the SDH optical transceiver that receives sent, amplify by circuit, the monitor signal of trafficability characteristic energy monitor signal interface output input optical power is given the AD and the DA circuit of veneer, to detect the luminous power size;

Data that data and clock recovery circuitry recover out and clock signal output to SDH overhead processing circuit part on the veneer by SDH data and interface clock signal; The speed signalization of control data and clock recovery circuitry is drawn by the FPGA inside of veneer, through-rate is provided with interface and outputs to optical transceiver module: promptly data and clock recovery circuitry are data and the clock signals of extracting SDH from the signal of telecommunication after the amplification, when extracting signal, the signal demand of the different rates pll lock phase place of different frequency, carry out clock and data extract, the signal through-rate signalization interface that phase-locked loop frequency is set is drawn out in the FPGA circuit on the veneer, central processing unit is provided with these signals by the logic among the FPGA, thereby the frequency that changes phase-locked loop reaches the purpose that changes service rate;

The modulated luminescence circuit comprises the laser of a fixed wave length, the function of this circuit is the output with data recovered signal modulated laser, allow laser produce and meet the G.692 light of standard, simultaneously the monitoring voltage trafficability characteristic energy monitor signal interface of the Output optical power of laser, drive current, temperature, these performances of refrigeration electric current is outputed to the AD and the DA circuit of veneer, monitor the size of these performance index by veneer;

Following logic has been done in FPGA inside at veneer: the data wire of central processing unit outputs to speed signalization line by latch and one with door, by triple gate to data wire; Central processing unit is by write order and the speed address is set opens latch, and the content that is provided with in the data wire is outputed to speed signalization line; By read command with read the address and open triple gate, the output of latch is outputed on the data wire, read the content of setting.

Flexibility of the present invention is embodied in it does not need to revise hardware unit, can reach the purpose of configuration service.But the method for this layoutprocedure by the optical transponder unit of speed flexible configuration of the present invention realizes:

Behind the Board Power up, at first carry out the veneer initialization: read the running status that the data that are stored in EEPROM inside are provided with veneer and optical transceiver module, the setting of service rate state wherein is to be provided with by reading the business information of depositing the EEPROM the inside;

Initialization finishes, and enters circulation, and cyclic process comprises: the performance of veneer is sampled and sampled data is handled, if the webmaster order is arranged then receive webmaster order and processing command;

The service rate of optical transceiver module is set then, finishes to be provided with reentering circulation; If other orders are arranged, carry out other process of commands;

Reenter circulation then, acquisition performance, deal with data.

Description of drawings

The structured flowchart of Fig. 1 device of the present invention;

FPGA internal logic figure in Fig. 2 veneer of the present invention;

The flow chart of Fig. 3 the method for the invention.

Embodiment

In conjunction with Fig. 1, Fig. 2 the device of technical solution of the present invention is further described: the central processing unit circuit comprises a slice central processing unit (CPU), a slice EEPROM, a slice flash memory (FLASH), two static RAMs (SRAM); CPU wherein carries out command process, the information of EEPROM storage veneer and module, and service rate type etc. for example, FLASH stores monoboard programme, and SRAM provides the data space of program running;

The FPGA circuit comprises a slice FPGA, in the logic of FPGA inside as shown in Figure 2, the latch (LPM-DEF) that comprises bus input and output, two NOR gate (NOR2), the triple gate of bus input and output (TRI) and with door (WIRE) each one, during Board Power up, at first by reset signal (/clr) clear latch, when speed is set, central processing unit by be provided with the speed address (/setrate) and write order (/wr) open latch, data on the data wire (d[1..0]) are outputed to the data outlet (output[1..0]) of latch, again by outputing to optical transceiver module (by the speed signalization line rate[1..0 of optical transceiver module] signal) with door (WIRE); During reading rate, central processing unit by read the address (/readrate) and read command (/rd) open triple gate (TRI), the output of latch is outputed on the data wire:

SDH overhead processing circuit comprises a slice SDH expense monitoring chip, and the input of chip is SDH data and the clock signal that optical transceiver module extracts, the outputing among the FPGA of chip;

AD and DA circuit comprise, a slice AD chip, a slice DA chip and a slice integrated operational amplifier, the performance monitor signal of optical transceiver module at first produces the voltage that meets AD chip input requirement by integrated operational amplifier circuit and gives the AD chip, there is the AD chip that these analog quantitys are become digital quantity, gives central processing unit by data/address bus; Digital quantity is converted to analog quantity by the DA chip, produces the aanalogvoltage that meets the module needs by integrated operational amplifier circuit again and gives module;

Photodetection and amplifying circuit in the optical transceiver module comprise: a photodiode (PIN), a slice limiting amplifier, photodiode is receiving to such an extent that the SDH light signal is converted to the signal of telecommunication, giving limiting amplifier amplifies, give data and clock recovery circuitry then and carry out the signal recovery, photodiode is also sent one road signal is given veneer as the input light detection AD chip;

Data and clock recovery circuitry comprise a slice data and clock recovery chip, and major function is extracted data and clock from amplify back SDH signal, and data are exported to the chip for driving of laser, give veneer data and clock simultaneously;

The modulated luminescence circuit comprises a laser, a slice laser driving chip and the observation circuit of forming by integrated transporting discharging, it is luminous that the SDH data-signal that recovers to come out is input to chip for driving generation modulation signal modulated laser, gives the AD chip of veneer after the performance of laser is amplified by integrated operational amplifier circuit.

The flow process of central processing unit program running is as shown in Figure 3:

Behind the Board Power up, at first carry out the veneer initialization: read the running status that the data that are stored in EEPROM inside are provided with veneer and optical transceiver module, the setting of service rate state wherein is to be provided with by reading the business information of depositing the EEPROM the inside; Initialization finishes, and enters circulation, and cyclic process comprises: the performance of veneer is sampled and sampled data is carried out, if the webmaster order is arranged then receive webmaster order and processing command; For example webmaster issues the service rate order is set, and program at first writes EEPROM to the type of service that is provided with, and the service rate of optical transceiver module is set then, finishes to be provided with to reenter circulation; If other orders are arranged, carry out other process of commands; Reenter circulation then, acquisition performance, deal with data.

The present invention compared with prior art, the configuration of the service rate of optical transponder unit is easy flexibly, does not need to change hardware, can in same system, move STM-1, STM-4, the business that STM-16 is different with gigabit Ethernet, not only made things convenient for production but also made things convenient for the client, and can save production cost.

Claims

But 1, a kind of light wavelength conversion apparatus of speed flexible configuration comprises veneer part and optical transceiver module part, is characterised in that described veneer partly comprises central processing unit circuit, AD and DA circuit, FPGA circuit and SDH overhead processing circuit; The central processing unit circuit sends order, manages and controls whole veneer, and finish the communication of calcaneus rete pipe; AD and DA circuit will be received the performance index monitoring voltage signal of gathering optical transceiver module after the order of central processing unit, offer central processing unit by the AD conversion, and back to optical transceiver module the data of central processing unit transmission by the DA conversion, the interface of AD and DA circuit and central processing unit is a data and address bus; Do the logic that the central processing unit operation needs in the FPGA circuit; The interface of FPGA and central processing unit is a data/address bus, address bus, clock line and control line; SDH overhead processing circuit therefrom extracts the overhead byte of SDH from receiving SDH data and the clock signal that optical transceiver module extracts, and SDH overhead processing circuit is a data/address bus with the interface of FPGA circuit;

Described optical transceiver module comprises: photodetection and amplifying circuit, data and clock recovery circuitry, modulated luminescence circuit; Photodetector in photodetection and the amplifying circuit sends light to the SDH optical transceiver that receives and changes the signal of telecommunication into, amplify by circuit, the monitor signal of trafficability characteristic energy monitor signal interface output input optical power is given the AD and the DA circuit of veneer, to detect the luminous power size;

Data that data and clock recovery circuitry recover out and clock signal output to SDH overhead processing circuit part on the veneer by SDH data and interface clock signal; The speed signalization of control data and clock recovery circuitry is drawn by the FPGA inside of veneer, through-rate is provided with interface and outputs to optical transceiver module: promptly data and clock recovery circuitry are data and the clock signals of extracting SDH from the signal of telecommunication after the amplification, when extracting signal, the signal demand of the different rates pll lock phase place of different frequency, carry out clock and data extract, the signal through-rate signalization interface that phase-locked loop frequency is set is drawn out in the FPGA circuit on the veneer, and central processing unit is provided with these signals by the logic among the FPGA;

The modulated luminescence circuit comprises the laser of a fixed wave length, the output of data recovered signal modulated laser of this circuit, allow laser produce the light of compliant, simultaneously the monitoring voltage trafficability characteristic energy monitor signal interface of the performance of laser output is outputed to the AD and the DA circuit of veneer, to monitor the size of these performance index.
But 2, the light wavelength conversion apparatus of a kind of speed flexible configuration according to claim 1, it is characterized in that: described FPGA has done following logic in inside: the data wire of central processing unit outputs to speed signalization line by latch and one with door, by triple gate to data wire; Central processing unit is by write order and the speed address is set opens latch, and the content that is provided with in the data wire is outputed to speed signalization line; By read command with read the address and open triple gate, the output of latch is outputed on the data wire, read the content of setting.
But 3, a kind of optical transponder unit method of speed flexible configuration, after comprising the steps: Board Power up, at first carry out the veneer initialization: read the running status that the data that are stored in EEPROM inside are provided with veneer and optical transceiver module, the setting of service rate state wherein is to be provided with by reading the business information of depositing the EEPROM the inside; Initialization finishes, and enters circulation, and cyclic process comprises: the performance of veneer is sampled and sampled data is handled, if the webmaster order is arranged then receive webmaster order and processing command; The service rate of optical transceiver module is set then, finishes to be provided with reentering circulation; If other orders are arranged, carry out other process of commands; Reenter circulation then, acquisition performance, deal with data.