CN1245006C - Electric module device compatible with optic module having the same rate - Google Patents
Electric module device compatible with optic module having the same rate Download PDFInfo
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- CN1245006C CN1245006C CN 00127424 CN00127424A CN1245006C CN 1245006 C CN1245006 C CN 1245006C CN 00127424 CN00127424 CN 00127424 CN 00127424 A CN00127424 A CN 00127424A CN 1245006 C CN1245006 C CN 1245006C
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Abstract
The present invention relates to an electric module device compatible to an optical module with the same rate in the field of communication, which comprises a high-frequency transformer, a line signal treatment module and an LOS detection module, wherein the high-frequency transformer receives line signals and outputs the signals to the line signal treatment module and the LOS detection module; the line signal treatment module outputs signals identical to output signals of the optical module with the same rate to a terminal side; the LOS detection module alarms and monitors the line signal loss conditions. When code form transformation is needed, a code form transformation module can be correspondingly increased to guarantee that the code form transformation is compatible to the optical module. The present invention can reduce the designing difficulty and the system cost of hardware circuits.
Description
Technical field
The present invention relates to the communications field, particularly relate to interface (interface) device of communication apparatus.
Background technology
In the modern communications field, communication is divided into radio communication and wire communication two big classes, and wherein the information transmission channels (medium) of wire communication facility can be divided into cable and optical fiber two big classes.In wireline equipment, in order to finish mutual information interchange, must be approach just with cable or optical fiber, the mode of receiving and sending messages by interface arrangement realizes.Wherein the interface arrangement that joins with cable is electrical interface (electrical interface), and the interface arrangement that joins with optical fiber is optical interface (optical interface).In existing communication network, such electrical interface and optical interface have obtained using widely, and they are present in respectively or simultaneously in the different communication system or equipment, and indispensable status is arranged.
In existing communication system (equipment), general electrical interface and the optical interface that all exist with phase same rate, for example at SONET (Synchronous optical network synchronous optical network, by the ANSI definition), SDH (Synchronous digital hierarchy Optical synchronization digital sequence, define by ITU-T, corresponding to SONET) in, exist corresponding to STS-1/STM-0 speed grade (51.840Mbps, hereinafter to be referred as 51M) 51M electrical interface and 51M optical interface, 155M electrical interface and 155M optical interface corresponding to STS-3/STM-1 speed grade (155.520Mbps is hereinafter to be referred as 155M); For another example in ETHERNET (Ethernet), also exist corresponding to the electrical interface of 10Mbps/100Mbps speed grade and optical interface or the like, such interface has obtained using very widely in communication equipment.In real world applications, optical interface mainly is that the mode with optical module realizes, wherein optical module mainly contains dual mode in encapsulation, and a kind of is that sending and receiving unit is packaged into an independently module separately, is referred to as the discrete optical module; Another kind is that sending and receiving unit is packaged together and becomes a module, is referred to as optical fiber transceiver module.Optical interface and electrical interface for the phase same rate, two kinds of implementations are generally arranged in existing communication equipment: a kind of is that interface with these two kinds of phase same rates is made in respectively on two kinds of different function cards (plate), and these two kinds of function cards other circuit and Control Software etc. except that the circuit difference of interface section is all basic identical.The shortcoming of doing like this is that the interface card research and development of phase same rate need to spend double cost at least, and causes unnecessary the increasing of feature card type of system, is unfavorable for the production of parts, the Installation and Debugging and the engineering maintenance of equipment.Another kind method is that two kinds of interface circuits are made on the function card simultaneously, as required the type of flexible option interface.The shortcoming of doing like this is two socket circuit shared identical functions circuit on same function card, difficulty is bigger on hardware designs, especially more difficult realization under interface rate and the function card integrated level situation of having relatively high expectations, these difficulty and research and development that increased system virtually drop into, and the existence of two cover circuit also is unfavorable for reduction of cost or the like.
The electric module device that the purpose of this invention is to provide the low and shortcoming that research and development have high input, system cost is high of a kind of design iterations, level of integrated system that can overcome prior art is with the design difficulty that reduces hardware circuit, simplify circuit, reduce research and development and drop into and system cost.
Summary of the invention
To achieve these goals, the present invention has constructed a kind of electric module device that is compatible with phase same rate optical module, it is characterized in that: form by receiving unit and bill unit two parts;
The receipts unit comprises: high frequency transformer, line signal processing module and LOS (Loss of Signal line signal is lost) detection module, the line signal of described high frequency transformer receiving lines side, after finishing circuit coupling and signal filtering, to described line signal processing module and described LOS detection module output signal, described line signal processing module receives the signal from high frequency transformer, to the output signal identical signal of end side output with the optical module of phase same rate; Described LOS detection module carries out alarm-monitor to the line signal loss situation from high frequency transformer;
Bill unit comprises: high frequency transformer, line signal processing module, described line signal processing module receive from end side with the identical signal of phase same rate optical module input signal, export to high frequency transformer; Described high frequency transformer receives the signal of described line signal processing module output, finish signal filtering and circuit coupling after, signal is delivered to the line side.
The present invention has also constructed the another kind of electric module device that is compatible with phase same rate optical module, it is characterized in that: go out to receive unit and bill unit two parts and form:
The receipts unit comprises: high frequency transformer, line signal processing module, LOS detection module and sign indicating number fractal transform module, the line signal of described high frequency transformer receiving lines side, finish circuit coupling and signal filtering, to described line signal processing module and described LOS detection module output signal, described line signal processing module receives the signal from described high frequency transformer, to described sign indicating number fractal transform module output signal, described sign indicating number fractal transform module is carried out a yard fractal transform to this signal, to end side output and the identical signal of same rate optical module port signal; Described LOS detection module carries out alarm-monitor to the line signal loss situation from described high frequency transformer;
Bill unit comprises: high frequency transformer, circuit driver module and sign indicating number fractal transform module, described sign indicating number fractal transform module receive from end side with the identical signal of phase same rate optical module input signal.And this signal carried out a yard fractal transform, signal after the conversion is outputed to described circuit driver module, described circuit driver module receives the signal from described sign indicating number fractal transform module, to described high frequency transformer output signal, described high frequency transformer receives the signal of described circuit driver module output, finish signal filtering and circuit coupling, signal is delivered to the line side.
In the present invention, sending and receiving unit all can be as independently module is compatible mutually with the discrete optical module, it is compatible mutually also can to lump together the optical module of making as a whole and transceiver, and the arrangement mode of the pin of described electric module device is identical with the pin arrangement mode of same rate optical module.
Because the electric module device that the present invention constructed is compatible mutually with the optical module of same rate, can keep under the constant prerequisite of original structure system, the optical module that replaces same rate with this electric module device, just can make former optical interface function card (plate) change the electrical interface function card (plate) of same rate into, thereby reduced the hardware designs difficulty effectively, simplified system function module, reduced the system research and development cost, shortened the R﹠D cycle, and be that device fabrication, engineering maintenance etc. bring just many facilities.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Fig. 1 is that the present invention proposes does not a kind ofly need to carry out yard electric module device structure chart of shape conversion.
Fig. 2 is the electric module device structure chart of the needs sign indicating number shape conversion that proposes of the present invention.
Fig. 3 is the structure chart of an embodiment of the present invention's electric module device shown in Figure 2.
Fig. 4 is the structure chart of another embodiment of the present invention's electric module device shown in Figure 2.
Embodiment
In actual applications, the output input signal of the optical interface of electrical interface and same rate is identical in some application scenario.But, also have in a lot of application scenarios, both signals are different, when the electric module of structure and optical module compatibility, need carry out conversion to two kinds of different signals, therefore to add a sign indicating number shape modular converter, to guarantee the consistency of electric module device and same rate optical module device output input signal.Shown in Figure 1 is not need to carry out yard electric module device of shape conversion; Shown in Figure 2 is needs the electric module device of sign indicating number shape conversion, need to prove, the present invention and the optical module compatibility of same rate are meant that signal is compatible mutually on the consistent and pin of both pin arrangement modes, promptly between the two pin to pin compatibility comprehensively.
Fig. 1 does not need to carry out yard electric module device structure chart of shape conversion, as can be seen, in order to reach the purpose with the optical module compatibility of same rate, the present invention handles signal, just, realize the compatibility of the pin of light, electric module to pin by the conversion of signals between line side and the end side; And to finish line signal loss detection function to line signal.Do detailed description below:
Concerning receiving the unit, line-side signal is sent into the line signal processing module, carry out respective handling after, the signal processing of receipts unit is finished in output and the identical signal of same rate optical module port signal.For monitoring and the detection of the accuracy that guarantees receiving and transmitting signal to rub-out signal, in receiving the unit, also comprised a LOS detection module, the line signal loss situation is monitored and detected, concrete grammar is that line-side signal is sent in the LOS detection module, decision circuit in this module is judged, if high level logical one of LOS when alarm output is arranged, be logical zero otherwise export a low level, the output of this LOS alarm is identical with the same rate optical module also.
Concerning bill unit, be admitted to the circuit driver module after the input of end side signal, after corresponding the processing, just output on the circuit, thereby finish the signal processing of bill unit.
Fig. 2 is the electric module device structure chart that needs the conversion of sign indicating number shape.
Receive the unit, line-side signal is sent into the line signal processing module and is carried out outputing to a yard fractal transform module after the respective handling and carry out a yard fractal transform, to realize the conversion of required sign indicating number shape from line side sign indicating number shape to end side, send at last and the identical signal of same rate optical module port signal, finish the signal processing of receiving the unit.In receiving the unit, also has the detection that function is LOS, concrete grammar is that line-side signal is sent in the LOS detection module, decision circuit in this module is judged, high level logical one of output when if the LOS alarm is arranged, otherwise exporting a low level is logical zero, and the output of this LOS alarm is identical with the same rate optical module also.
Bill unit is admitted to a yard fractal transform module after the input of end side signal and carries out a yard fractal transform, and its function is to finish the conversion of end side signal code shape to line side desired signal sign indicating number shape.This shows that this module is the same with the sign indicating number fractal transform module of receiving the unit, all are the mutual conversions that are used to finish between line side desired signal sign indicating number shape and the end side desired signal sign indicating number shape, and both is reciprocal processes as can be known from signal flow.Just send into the circuit driver module after the signal output behind the sign indicating number fractal transform, after corresponding the processing, just output on the circuit, thereby finish the signal processing of bill unit.
Embodiment shown in Figure 3 is the structured flowchart that is compatible with the electric module of PDH (Plesiochronous digital hierarchy PDH (Pseudo-synchronous Digital Hierarchy)) 51M optical module.In receiving the unit, the PDH line signal of 51M at first enters in the high frequency transformer after sending into electric module, this transformer finish between line side and internal circuit coupling and to the filtering and the isolating exterior direct current signal of input signal; The signal that comes out from transformer enters equalizing circuit and LOS detection module simultaneously.Equalizing circuit carries out signal equalization to input signal, improves the frequency response characteristic of signal, and suitable amplifying signal, outputs to a yard fractal transform module then.Because the signal code shape of coming from electrical interface is CMI (Coded Mark Inversion), and the signal code shape of optical module output is NRZ (a Non-return to zero NRZ), output signal for compatible two kinds of modules, need be converted to required NRZ to CMI, thereby the signal that sign indicating number fractal transform module is come the line side is converted to NRZ from CMI, generate then and compatible the same 51M TTL (the Transistor-Transistor Logic transistor-transistor logic) data bus signal of optical module, thereby this bus signals is exported electric module.The LOS detection module carries out alarm-monitor to line signal, when finding that line signal is lost, this module is alarm signal of output outwards, be a high level logical one just if LOS when alarm output signal is arranged, otherwise output signal is that a low level is a logical zero, and this alarm signal is identical with optical module output.In bill unit, the 51MTTL data/address bus enters a yard fractal transform module after signal is imported electric module, send into drive circuit after making NRZ be converted to the CMI signal, in drive circuit, signal will be exaggerated, and when signal reached certain gain, signal was sent on the high frequency transformer, after transformer is finished signal filtering and circuit coupling, signal is delivered on the circuit.
Embodiment shown in Figure 4 is the structured flowchart of electric module device that is compatible with the 155M optical module of SDH.In receiving the unit, the line signal of 155M at first enters in the high frequency transformer after sending into electric module, this transformer finish between line side and internal circuit coupling and to the filtering and the isolating exterior direct current signal of input signal; The signal that comes out from transformer enters equalizing circuit and LOS detection module simultaneously.Equalizing circuit carries out signal equalization to input signal, improves the frequency response characteristic of signal, and suitably outputs to a yard fractal transform module behind the amplifying signal.Because the signal code shape of coming from electrical interface is CMI, and the signal code shape of optical module output is NRZ, output signal for compatible two kinds of modules, need be converted to required NRZ to CMI, thereby a sign indicating number fractal transform module is exactly that the signal that the line side is come is converted to the NRZ sign indicating number from CMI, generates the output of 155M TTL data bus signal then.In the 155M optical module, the signal that outputs to pin is the NRZ sign indicating number of forward differential signal PECL (Positive Emitter Coupled Logic) level, in order to reach compatible purpose, need be converted to the data of 155M TTL the PECL level signal of 155M.Therefore, it after sign indicating number fractal transform module a level switch module, this level switch module is converted to a pair of satisfactory 155M PECL signal output to the 155M TTL data with bus mode, delivers on the pin of electric module, thereby has realized receiving the function of unit.The LOS detection module of receiving in the unit carries out alarm-monitor to the line signal from high frequency transformer output, when finding that line signal is lost, this module is alarm signal of output outwards, be a high level logical one just if LOS when alarm output signal is arranged, otherwise output signal is that a low level is a logical zero, and this alarm signal is identical with optical module output.In bill unit, after the pin input of electric module, enter level switch module with the NRZ signal of 155M PECL level mode, make it convert Transistor-Transistor Logic level to and export in the data/address bus mode, enter a yard fractal transform module then.In sign indicating number fractal transform module, the NRZ signal is converted into the CMI signal, promptly send into drive circuit after this output then, in drive circuit, signal will be exaggerated, when signal reaches certain gain, be sent on the high frequency transformer, on transformer, finish signal filtering and circuit coupling, then signal is sent electric module to cable line, thereby finished the function of bill unit.
More than two embodiment further described the implementation of the electric module that is compatible with phase same rate optical module.This shows and use the light that the present invention has solved the phase same rate effectively, the compatibling problem of electrical interface function card (plate), and reduced manpower in the system research and development, the input of material resources, shortened the R﹠D cycle, remarkable to reducing the system cost effect, and, application scenario of the present invention comprises and is not limited to PDH and SDH, at SONET, Asynchronous Transfer Mode ATM (Asynchronous transfer mode), wave division multiplexing WDM (Wavelength-division multiplexing), dense wave division multipurpose DWDM (Dense Wavelength-division multiplexing), Ethernet ETHERNET etc. has the occasion of similar interface arrangement and all can be used widely.
Claims (7)
1, a kind of electric module device that is compatible with the same rate optical module is characterized in that: form by receiving unit and bill unit two parts;
The receipts unit comprises: high frequency transformer, line signal processing module and LOS detection module, the line signal of described high frequency transformer receiving lines side, finish circuit coupling and signal filtering, to described line signal processing module and described LOS detection module output signal, described line signal processing module receives the signal from described high frequency transformer, to the output signal identical signal of end side output with phase same rate optical module; Described LOS detection module carries out alarm-monitor to the line signal loss situation from described high frequency transformer;
Bill unit comprises: high frequency transformer, line signal processing module, described line signal processing module receive from end side with the identical signal of phase same rate optical module input signal, to described high frequency transformer output; Described high frequency transformer receives the signal of described line signal processing module output, finishes signal filtering and circuit coupling, and signal is delivered to the line side.
2, the electric module device that is compatible with the same rate optical module according to claim 1 is characterized in that:
Described sending and receiving unit is compatible mutually with the optical module of the transceiver of same rate.
3, the electric module device that is compatible with the same rate optical module according to claim 1 is characterized in that:
Receipts unit in described receipts unit and the same rate optical module is compatible mutually, and the bill unit in described bill unit and the same rate optical module is compatibility mutually.
4, a kind of electric module device that is compatible with the same rate optical module is characterized in that: form by receiving unit and bill unit two parts;
The receipts unit comprises: high frequency transformer, the line signal processing module, the LOS detection module, sign indicating number fractal transform module and level switch module, the line signal of described high frequency transformer receiving lines side, finish circuit coupling and signal filtering, to described line signal processing module and described LOS detection module output signal, described line signal processing module receives the signal from described high frequency transformer, to described sign indicating number fractal transform module output signal, described sign indicating number fractal transform module is carried out a yard fractal transform to this signal, to end side output and the identical signal of same rate optical module port signal, described LOS detection module carries out alarm-monitor to the line signal loss situation from described high frequency transformer; Described level switch module receives the signal of described sign indicating number fractal transform module output, is to export to end side after the PECL level signal with this conversion of signals;
Bill unit comprises: high frequency transformer, the circuit driver module, sign indicating number fractal transform module and level switch module, described sign indicating number fractal transform module receive from end side with the identical signal of phase same rate optical module input signal, and this signal carried out a yard fractal transform, signal after the conversion is outputed to described circuit driver module, described circuit driver module receives the signal from described sign indicating number fractal transform module, to described high frequency transformer output signal, described high frequency transformer receives the signal of described circuit driver module output, finish signal filtering and circuit coupling, signal is delivered to the line side, the PECL level signal of described level switch module receiving terminal side, this PECL level signal is converted to the Transistor-Transistor Logic level signal, outputs to described sign indicating number fractal transform module.
5, the electric module device that is compatible with the same rate optical module according to claim 4 is characterized in that:
In receiving the unit, described line signal processing module adopts equalizing circuit, and described sign indicating number fractal transform module adopts CMI/NRZ sign indicating number fractal transform module;
In bill unit, described circuit driver module adopts drive circuit, and described sign indicating number fractal transform module adopts NRZ/CMI sign indicating number fractal transform module.
6, want the 4 described electric module devices that are compatible with the same rate optical module according to right, it is characterized in that:
Described sending and receiving unit is compatible mutually with the optical module of the transceiver of same rate.
7, the electric module device that is compatible with the same rate optical module according to claim 4 is characterized in that:
Receipts unit in described receipts unit and the same rate optical module is compatible mutually, and the bill unit in described bill unit and the same rate optical module is compatibility mutually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00127424 CN1245006C (en) | 2000-11-09 | 2000-11-09 | Electric module device compatible with optic module having the same rate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00127424 CN1245006C (en) | 2000-11-09 | 2000-11-09 | Electric module device compatible with optic module having the same rate |
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| Publication Number | Publication Date |
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| CN1352506A CN1352506A (en) | 2002-06-05 |
| CN1245006C true CN1245006C (en) | 2006-03-08 |
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| CN 00127424 Expired - Fee Related CN1245006C (en) | 2000-11-09 | 2000-11-09 | Electric module device compatible with optic module having the same rate |
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Granted publication date: 20060308 Termination date: 20171109 |