CN101043506B - Method for determining automatically access service types - Google Patents

Abstract

The disclosed method for automatic deciding the access business type comprises: 1. configuring relative business configuration command for different business type, and storing the relation in a control unit; 2. according to the business configuring command, receiving the business data with matched business mode; 3. deciding whether the extracted output clock synchronous with the reference clock; and 4. if yes, querying the corresponding relation to determine current business type according to current business configuration command; or else, selecting new configuration command, and repeating steps 2-4. This invention reduces production procedure.

Description

A kind of method of automatic judgement access service types

Technical field

The present invention relates to a kind of method of automatic judgement access service types, judge the method for access service types in particularly a kind of Wave division multiplexing optical transmission system automatically.

Background technology

Wave division multiplexing optical transmission system has that capacity is big, the outstanding feature of long transmission distance, usually in optical transfer network as key circuit, transmit telecommunication services such as jumbo Various types of data, voice, comprise that the SDH (Synchronos Digital Hierarchy, synchronous digital hierarchy) that transmits various speed grade is professional, Ethernet is professional and IP operation.The receiving terminal of early stage Wave division multiplexing optical transmission system can only receive the SDH business or the Ethernet business of single-rate grade, when needs transmission different rates grade or dissimilar signal service, must change the demand that different types of optical module could satisfy actual transmissions, obviously the increase of optical module kind will inevitably make the cost of optical transmission system increase.When this external Wave division multiplexing optical transmission system channel service is provided with, also must clearly know the type of service that system will transmit in advance, if and when the signal of same wavelength division multiplexing system channel layer transmission different service types, need in time to change configuration information to satisfy the demand of actual transmissions business, obvious this Wave division multiplexing optical transmission system does not have flexibility, and has increased the cost of optical transmission system.Development along with optical communication technique, people have succeeded in developing the multi-service light delivery module that can receive the multiple business type, but this optical module still needs at first clear and definite type of service when receiving different business, then when debugging by manually preestablishing the configuration that can receive this business, workflow when this has increased the optical module debugging on the one hand, this on the other hand optical module is on the wavelength-division optical transmission system during online operation, also need artificial layoutprocedure, receive professional demand so still can not satisfy auto-negotiation, in case when needing to change the type of service that to transmit, will inevitably run into the problem that transport service is blocked, owing to there is human factor, the possibility of generation accident has also just increased thereupon simultaneously.

Summary of the invention

Technical problem solved by the invention has been to provide a kind of method that can judge access service types automatically, when optical transmission system has online service operation, can judge automatically and discern access service types to solve, to avoid using the configuration of manually carrying out type of service.

For solving the problems of the technologies described above, the invention provides a kind of method of automatic judgement access service types, the multi-service light delivery module that is used for optical transmission system, the multi-service light delivery module disposes access service types automatically under the control of internal control unit, and from the synchronous clock of exporting of the high-speed data signal extraction of input, this method comprises the steps:

(1) is stored in the described control unit at the different business configuration order of different service types configuration, and with its corresponding relation;

(2) the business configuration order that issues according to control unit of described multi-service light delivery module is used with this configuration order corresponding service pattern and is received business datum;

(3) inquire about described multi-service light delivery module from whether synchronous by described control unit with input reference clock according to the output clock that extracts the high speed signal that described business model receives and processing obtains;

(4) if synchronously,, inquire about the corresponding relation of described business configuration order and type of service, determine current type of service then according to the current business configuration order; If asynchronous, then select a new business configuration order by control unit, be issued to described multi-service light delivery module, and repeating step (2)-(4).

Described step (3) can be to be determined by the work state information that control unit is inquired about the phase-locked loop circuit in the described multi-service light delivery module.When phase-locked loop circuit sends the losing lock alarm signal, it is asynchronous with input clock then to be judged as the output clock; If do not send the losing lock alarm signal, it is synchronous then to be judged as output clock and input clock.

Described control unit can be the inner integrated Single Chip Microcomputer (SCM) system of multi-service light delivery module.

Use the present invention, can revise service configuration information automatically according to access service types, thereby can satisfy the demand of auto-negotiation access service, and can discern access service types automatically.Can also be further when the large-scale production of multi-service light delivery module according to the present invention, need not be again the access service types of multi-service light delivery module be configured in advance, thereby have shortened the production procedure of multi-service light delivery module.

Description of drawings

Fig. 1 is phase-locked loop circuit figure basic described in the embodiment of the invention;

Fig. 2 is a major control schematic flow sheet of judging access service types described in the embodiment of the invention automatically;

Fig. 3 is applicable to described in the embodiment of the invention that 2.5Gb/s optical transmission system auto-negotiation inserts and the circuit diagram of the identification of access service types;

Fig. 4 is applicable to described in the embodiment of the invention that 2.5Gb/s optical transmission system auto-negotiation inserts and the phase-locked loop circuit schematic diagram of the identification of access service types;

Fig. 5 is applicable to described in the embodiment of the invention that 10Gb/s optical transmission system auto-negotiation inserts and the circuit diagram of the identification of access service types.

Embodiment

In Wave division multiplexing optical transmission system, no matter receive only the multi-service light delivery module of single type of service or reception multi-service type, all be the process that realizes opto-electronic conversion and extract synchronised clock.Whether and thinking of the present invention utilizes detection to compare from receiving and handle the output clock and the input reference clock that extract the high speed signal that obtains with the different business pattern of setting just, synchronous by judging it, and then judges access service types.

According to thinking of the present invention, it is multiple to provide the circuit of exporting clock and input clock comparison to have, and the invention provides a specific embodiment, promptly utilizes phase-locked loop circuit to detect.

As shown in Figure 1, be a basic phase-locked loop circuit block diagram, comprisephase detector circuit 101,low pass filter 102, voltage controlledoscillator 103 andfrequency division system 104, input reference clock etc., comprise auxiliary circuits such as frequency dividing circuit in addition.The major function of phase-locked loop circuit is in order to obtain and the output clock of input reference clock with frequency, homophase.

In the actual light transmission system, input reference clock can extract from high-speed data signal, utilize clock source, input reference clock source for referencial use then, compare with the output high-speed clock signal, if output high-frequency clock and reference source clock synchronization, then can not export the losing lock alarm signal, if opposite output high-frequency clock is asynchronous with the reference source clock, then can export a losing lock alarm signal, utilize the service configuration information of this alarm signal and multi-service multi-service light delivery module, and just can judge the access signal rate, and then can discern access service types in conjunction with reference clock source.

The method of the automatic judgement access service types that the embodiment of the invention proposes, main purpose is to be used for discerning automatically the type of service of institute's carrying signal, comprise 2.5Gb/s SDH signal, STM-1/4/16 and these professional FEC (Forward Error Correction are arranged specifically, forward error correction) signal also has GbE (gigabit Ethernet) signal and FEC signal thereof.Can also extend to the 10Gb/s optical transmission system further, the type of service that can discern automatically comprises 10Gb/s SDH signal, specifically comprises STM-64 and meets ITU-T G.709 the 10Gb/s FEC business, 10GbE business, 10GFiber Channel business etc. of standard.

The embodiment of the invention mainly is a single-chip microcomputer signal processing system of utilizing the multi-service light delivery module inner integrated, judges access service types in conjunction with the phase-locked loop losing lock alarm signal and the multi-service light delivery module type of service configuration information of the inner phase-locked loop circuit of multi-service light delivery module.Inner integrated monolithic machine signal processing system in the multi-service light delivery module, single-chip microcomputer is constantly inquired about the losing lock alarm signal that multi-service light delivery module phase-locked loop provides, and issues access service rate configuration information to the multi-service light delivery module and realize goal of the invention.

Fig. 2 is that control flow mainly comprises according to the control flow schematic diagram of the described automatic judgement access service types of the embodiment of the invention:

Step 201, at the corresponding relation that has disposed business configuration order and type of service, after the multi-service light delivery module power supply, the modular program initialization begins; Single-chip microcomputer issues preliminary service configuration information to the multi-service light delivery module;

Step 202, single-chip microcomputer inquiry multi-service light delivery module phase-locked loop circuit state information;

Step 203, judge whether phase-locked loop circuit has the losing lock alarm signal to produce, otherwise changestep 204 over to, have then to changestep 206 over to;

Step 204, processing multi-service light delivery module phase-locked loop circuit state information, if phase-locked loop circuit losing lock alarm signal does not produce, then single-chip microcomputer keeps the configuration information of this access service types, and will control the latch write-protect of this service configuration information;

Step 205, then itself and the access service types that is stored in the single-chip microcomputer relatively and by network management system are reported, can judge actual access service types;

Ifstep 206 phase-locked loop losing lock alarm signal produces, then single-chip microcomputer changes the access service rate configuration information that issues to the clock and data recovery circuit, phase-locked loop losing lock alarm signal still exists after changing the access service configuration information, then single-chip microcomputer continues to change the access service rate configuration information that issues to the clock and data recovery circuit, till the alarm of phase-locked loop losing lock disappears; Single-chip microcomputer keeps the configuration information of this access service types, and will control the latch write-protect of this service configuration information; Record is also judged multi-service light delivery module access service types, finishes.

Fig. 3 is that the present invention is applicable to that 2.5Gb/s optical transmission system auto-negotiation inserts and the identification embodiment circuit diagram of access service types, comprising:photodetector 301, wide-band amplifier 302, clock anddata recovery circuit 303, Rs, amplifier, power-supply circuit, Single Chip Microcomputer (SCM)system 304,latch 305, interface matched circuit etc.

Present embodiment mainly is applicable to 2.5Gb/s optical transmission system multi-service light receiving module.Fig. 3 is the photoelectric switching circuit of this Optical Receivers, as shown in the figure, afterphotodetector 301 is converted to the signal of telecommunication with the light signal that receives, amplify by wide-band amplifier 302, high-speed data after will being transformed by clock anddata recovery circuit 303 then and high-frequency clock are exported, and finish the regenerative process of transmission of electric signals.Data andclock recovery circuitry 303 comprise A, B, four parts of C, D among the figure, and wherein A is the high speed amplifying circuit, and B is crucial phase-locked loop circuit, C is the high-speed data regenerative circuit, under the triggering of the high-frequency clock that B exports, high-speed data signal is recovered out, D is the speed buffering circuit.Clock anddata recovery circuit 303 need the input reference clock source, by the frequency dividing ratio of Single Chip Microcomputer (SCM)system 304 bylatch 305 output speed control signals control high frequency clock, phase-locked loop circuit output losing lock alarm signal LOL, can give single-chip microcomputer by interface matched circuit then, preestablish shown in business configuration order and the following tabulation of corresponding service type:

The business configuration order	Corresponding transport service type
		0x00	STM-16
0x01	STM-4
		0x02	STM-1
0x03	GbE
		0x04	STM-16 with FEC
0x05	STM-4 with FEC

The business configuration order	Corresponding transport service type
		0x06	STM-1 with FEC
0x07	GbE with FEC

The multi-service light delivery module powers on after the modular program initialization end, the initial setting access service types, be assumed to be 0x00, if what this moment, Optical Receivers received is the SDH business of 2.5Gb/s, then phase-locked loop circuit does not have the output of losing lock alarm signal, and single-chip microcomputer was noted current business configuration information and more promptly can be known current access service types with corresponding transport service type this moment.If what this moment, Optical Receivers received is the GbE signal, then phase-locked loop circuit has alarm signal to export to single-chip microcomputer, single-chip microcomputer is according to alarm signal issuing service configuration order 0x01 again, find that the losing lock alarm signal still exists, so repeat to issue new business configuration order, up to issuing service configuration order 0x03, till this moment, the losing lock alarm disappeared, so just realized the function of auto-negotiation access service, note current business configuration information simultaneously, and more promptly can know current access service types with corresponding transport service type.

Fig. 4 is a phase-locked loop circuit schematic diagram among the embodiment, as shown in the figure, comprises in the circuit:frequency lock detector 401, low pass filter, phase discriminator, voltage controlled oscillator, high-speed buffer, frequency division control etc.

Not only comprised basic phase-locked loop circuit part in the present embodiment circuit, also increased the comparison circuit part of clock signal and input reference clock, befrequency lock detector 401, if output high-frequency clock and input reference clock is synchronous, then can the outputting alarm signal; Otherwise, if the output clock is asynchronous with input reference clock, then can export a phase-locked loop losing lock alarm signal LOL, this signal inputs to Single Chip Microcomputer (SCM) system by interface matched circuit and makes signal processing.

Fig. 5 is that the present invention is applicable to that 10Gb/s optical transmission system auto-negotiation inserts and the circuit diagram of the identification of access service types, as shown in the figure, comprise in the circuit: high-speed data pre-process circuit, clock and data recovery circuit 504,1:16 demodulation multiplexer, 16bit register, frequency lock detector 501, amplifier 502, voltage controlled oscillator 503, Single Chip Microcomputer (SCM) system 505,4bit counter 506, speed buffering circuit etc.

The present embodiment circuit mainly is applicable to 10Gb/s optical transmission system multi-service optical transport module, the identification circuit figure that is applicable to the 2.5Gb/s optical transmission with Fig. 3 compares, it mainly is to increase to understand the multiplex circuit link, be used for the 10Gb/s high speed signal is demultiplexed into 16 road low speed signals, phase-locked loop circuit and scm managing system are equal to 2.5Gb/s multi-service optical transmission system substantially, in the optical transmission of implementing 10Gb/s, then can preestablish shown in business configuration order and the following tabulation of corresponding service type:

The business configuration order	Corresponding transport service type
		0x00	STM-64
0x01	10GbE
		0x02	G.709 FEC

0x03	10GbE FEC
		0x04	10Gb/s Fiber Channel

Identical in the optical transmission of its concrete implementing procedure and 10Gb/s.

Wherein, the business configuration that frequency lock detector 501, amplifier 502, voltage controlled oscillator 503, clock and data recovery circuit 504 and Single Chip Microcomputer (SCM) system 505 are given it comprises 4bit counter 506 output loop clock signals, finishes the function of phase-locked loop circuit.Frequency lock detector is equivalent to the phase discriminator function, and the signal of output is used for controlling the output clock of voltage controlled oscillator, and the output clock feeds back to again in the phase discriminator loop, forms phase-locked loop circuit.It mainly is the function of control frequency dividing ratio that type of service is provided with.

Use the present invention, can revise service configuration information automatically according to access service types, thereby can satisfy the demand of auto-negotiation access service, and can discern access service types automatically.So just avoided under the prerequisite of indeterminate type of service, produced misoperation during owing to the human configuration type of service, thereby caused actual access service to interrupt, caused the possibility of heavy losses.In addition can also be further when the large-scale production of multi-service light delivery module according to the present invention, need not be again the access service types of multi-service light delivery module be configured in advance, thereby have shortened the production procedure of multi-service light delivery module.Utilize this method to realize the demand of the auto-negotiation transport service of multi-service light delivery module.

Claims (8)

1. method of automatically judging access service types, the multi-service light delivery module that is used for optical transmission system, described multi-service light delivery module is realized opto-electronic conversion under the control of internal control unit, and according to the synchronous output of input reference clock extraction clock, it is characterized in that described method comprises the steps:

(1) is stored in the described control unit at the different business configuration order of different service types configuration, and with its corresponding relation;

(2) the business configuration order that issues according to control unit of described multi-service light delivery module is used with this configuration order corresponding service pattern and is received business datum;

(3) inquire about described multi-service light delivery module from whether synchronous by described control unit with input reference clock according to the output clock that extracts the high speed signal that described business model receives and processing obtains;

(4) if synchronously,, inquire about the corresponding relation of described business configuration order and type of service, determine current type of service then according to the current business configuration order; If asynchronous, then select a new business configuration order by control unit, be issued to described multi-service light delivery module, and repeating step (2)-(4).

2. the method for claim 1 is characterized in that, in the described step (2), when described multi-service light delivery module initially powers on, by business configuration order of control unit Random assignment.

3. the method for claim 1 is characterized in that, described step (3) is to be determined by the work state information that control unit is inquired about the phase-locked loop circuit in the described multi-service light delivery module.

4. method as claimed in claim 3 is characterized in that, if described phase-locked loop circuit sends the losing lock alarm signal, it is asynchronous with input clock then to be judged as the output clock; If do not send the losing lock alarm signal, it is synchronous then to be judged as output clock and input clock.

5. the method for claim 1 is characterized in that, in the described step (4), described is according to the order of the business configuration order of configuration by new business configuration order of control unit selection, switches to next business configuration order.

6. the method for claim 1 is characterized in that, in the described step (4), when clock is synchronous, further comprises: described control unit keeps the current business configuration order, and will control the latch write-protect of this business configuration order.

7. the method for claim 1 is characterized in that, in the described step (4), when clock is synchronous, further comprises: described definite current type of service is reported by network management system.

8. the method for claim 1 is characterized in that, described control unit is the inner integrated Single Chip Microcomputer (SCM) system of multi-service light delivery module.

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