CN102404048A

CN102404048A - No warning switching method for SONET/SDH network line and monitoring equipment

Info

Publication number: CN102404048A
Application number: CN2011103875340A
Authority: CN
Inventors: 陈普辉; 胡海聿
Original assignee: NANJING ZHONGXING SPECIAL SOFTWARE CO Ltd
Current assignee: NANJING ZHONGXING SPECIAL SOFTWARE CO Ltd
Priority date: 2011-11-29
Filing date: 2011-11-29
Publication date: 2012-04-04
Anticipated expiration: 2031-11-29
Also published as: CN102404048B

Abstract

The invention relates to a no warning switching method for SONET/SDH network line and a piece of monitoring equipment. Line switching is finished by special chip frame former FRMAER or programmable chip FPGA, and error code data will not be produced due to line switching, but these error code data will cause terminating router on the network line to generate warning signal. SDH frame decomposition, information payload transmission, packaging and frame formation are carried out in the FRAMER/FPGA, and line switching is realized by changing configuration of the information payload transmission channel, so that the SDH frame decomposition and frame formation will not be influenced with the line switching, the error code data is avoided being produced and the warning signal will be no longer generated by the terminating router on the line.

Description

A kind of SONET/SDH network line is used method and the watch-dog that switches with nowhere to turn to alert

Technical field

The present invention relates to the Internet field, especially a kind of circuit-switched implementation method, specifically a kind of SONET/SDH network line is used method and the watch-dog that switches with nowhere to turn to alert.

Background technology

At present, the explosive increase of using along with Internet is to the high safety of IP network, can manage also and have higher requirement.IP network is not only wanted normal customer service can be provided, and will possess controllability, can on Internet, monitor invalid information.Watch-dog is embedded in the Internet circuit, and all data on the Internet circuit are all passed through and transmitted after watch-dog is handled again, and are as shown in Figure 1.Two routers on circuit, watch-dog is mainly transmitted the message that receives, and abandons meeting the message that imposes a condition, to not meeting the message transmission that imposes a condition.

Analyze from function, watch-dog is made up of data stream filtering module and circuit handover module, and is as shown in Figure 2.The overanxious module of data flow is carried out overanxious according to imposing a condition to Internet track data stream.The circuit handover module provides blocking-up Internet track data stream and two paths of transparent transmission Internet track data stream.On existing watch-dog, all be to adopt optical switch that two paths are provided at present, scheme is as shown in Figure 2.

Optical switch is to have one or more optional transmit pories, and what adopt in the scheme of Fig. 2 is the optical switch of 1*2, and three ports are provided, through changing driving voltage, and can be in selected path transmit optical signals.Also can adopt the optical switch (four ports promptly are provided) of 2*2.

In Fig. 2, solid line is the blocking-up path, the data that router one sends through optical switch 1 to the overanxious module of data flow, the data after overanxious through optical switch 2 to router two.The data that router two receives are the results after the data of router one transmission are passed through the overanxious resume module of data flow; Dotted line is the transparent transmission path, and the data that router one sends directly arrive router two through optical switch 1 and 2, and the data that data that router two receives and router one send are in full accord.

In the course of work of watch-dog, need between two paths to switch.This kind scheme can be competent at requirement fully in the circuit of Ethernet.But,, make this kind scheme have following shortcoming owing to there is the overhead byte of enriching to come the monitoring wire transmission performance for the SONET/SDH network line:

1) switching of circuit unavoidably light path short interruption can occur, and wink break time is by the light shutter device decision of adopting.At present, from 10ms to 10us, do not wait the switching time of optical switch.Port status UP/DOWN upset appears in this hit process of router meeting perception at two ends.

2) error code of the hit of light path generation is considerably beyond the error performance objective requirement of SONET/SDH network fiber transmission.On the router at two ends, can't switch the error code of generation and the error code that Internet line fault causes by the differentiated treatment circuit, therefore can't realize transparent monitoring.

3) under the situation that, port many at circuit is many, unfavorable to circuit monitoring.

Summary of the invention

The objective of the invention is to produce the problem of error code alarm when circuit switches, propose a kind of SONET/SDH network line and use method and the watch-dog that switches with nowhere to turn to alert in the SONET/SDH network line.

Technical scheme of the present invention is:

A kind of SONET/SDH circuit is used the watch-dog that switches with nowhere to turn to alert; It comprises circuit handover module and data stream filtering module; It is characterized in that described circuit handover module comprises fiber coupler, optical switch, first optical module, at least one FRAMER/FPGA and second optical module; Described fiber coupler is used to realize the shunt of light signal, will from an optical fiber, divide to two optical fiber from the light signal that router receives, and one of which road light signal exports an input of optical switch to; Another road light signal converts the signal of telecommunication into through first optical module; And export FRAMER/FPGA to, and carrying out the SDH frame and separate frame, information payload transmission and encapsulation framing, the signal of telecommunication after FRAMER/FPGA handles exports the data stream filtering module to after second optical module converts light signal into; Data stream filtering module filtered data outputs to FRAMER/FPGA after converting the signal of telecommunication into through second optical module; Carry out the SDH frame once more and separate transmission of frame, information payload and encapsulation framing, the data output of FRAMER/FPGA converts another input that exports optical switch behind the light signal to into through first optical module, and the output of optical switch is connected to the signal input part of end-to-end router.

Equipment of the present invention also comprises spectroscopic detectors, and described spectroscopic detectors comprises light splitting coupler and photodiode, and spectroscopic detectors is monitored the output situation of fiber coupler between fiber coupler output and optical switch input.

Optical switch of the present invention adopts monostable 1*2 optical switch.

FRAMER/FPGA of the present invention is two devices in the STM-64/OC-6 of two-forty network; The one FRAMER/FPGA and the 2nd FRAMER/FPGA all are serially connected between first optical module and second optical module; Be used for that all signal is carried out the SDH frame and separate frame and encapsulation framing, and the transmission channel of information payload is provided; And in the network of STM-1/OC-3, STM4/OC-4 and the STM-16/OC-5 of low speed, be a device, for narrating conveniently, hereinafter is that example is described with the STM-16/OC-5 network that adopts a device.

A kind of SONET/SDH network line is used with nowhere to turn to alert changing method; Use the SONET/SDH network line and use the watch-dog that switches with nowhere to turn to alert; It is characterized in that transparent transmission track data path switches with blocking-up track data path carries out through FRMAER/FPGA; Accomplish configuration and the encapsulation framing that the SDH frame is separated frame, information payload transmission channel by FRMAER/FPGA, eliminate the error code data and promptly eliminate alarm.

Beneficial effect of the present invention:

Circuit monitoring of the present invention is transparent fully to circuit, and two ends router unaware is with nowhere to turn to the police; Through rule server is that webmaster control is switched or automatic switchover; Additional light path transparent transmission path, the reliability of enhancing Internet transmission line; Additional real-time device self-checking function guarantees that watch-dog normally moves.

Description of drawings

Fig. 1 is traditional supervisory control system structural representation.

Fig. 2 is traditional supervisory control system theory diagram.

Fig. 3 is a supervisory control system theory diagram of the present invention.

Fig. 4-a is a blocking-up track data path sketch map of the present invention.

Fig. 4-b is a transparent transmission track data path sketch map of the present invention.

Fig. 5 is a light path transparent transmission of the present invention path sketch map.

Fig. 6 is a specific embodiments block diagram of the present invention.

Fig. 7 is that light path of the present invention detects sketch map.

Embodiment

Below in conjunction with accompanying drawing and embodiment the present invention is further described.

A kind of SONET/SDH circuit is used method and the watch-dog that switches with nowhere to turn to alert, realizes switching with nowhere to turn to alert of circuit.As shown in Figure 3: fiber coupler (Coupler) is to realize the light signal passive component of function along separate routes; The light signal is divided from an optical fiber at the most in the bar optical fiber; The standard coupler for two branches that adopts in the scheme is divided into two power with an input light signal and exports respectively.Optical module (optical transceiver) mainly is to realize photoelectricity/electro-optical conversion, comprises that the luminous power detection waits some functions, and the optical module left side is an optical interface in the scheme, and the right side is an electrical interface.On the SONET/SDH circuit, three layers user data is included in the information payload zone (Payload), and the SDH frame is formed in some section overheads of affix (SOH) zone and Administrative Unit Pointer (AUPTR) zone.The SDH frame is separated frame, information payload transmission and encapsulation framing and is accomplished by special chip framer FRAMER or programmable chip FPGA.Optical switch (1*2) provides a light path transparent transmission path.

This scheme provides transparent transmission track data and blocking-up track data two kinds of data transmission paths, and data flow is as shown in Figure 4 respectively

Wherein, During blocking-up track data stream, data flow circuit is as scheming a) shown in the solid arrow: the overanxious module of router one → fiber coupler → first optical module → FRAMER/FPGA → second optical module → data flow → second optical module → FRAMER/FPGA → first optical module → optical switch → router two.The data that router two is accepted are the results after the data of router one transmission are passed through the overanxious resume module of data flow.

In transparent transmission track data when stream,, the path of data flow is like figure b) shown in the solid arrow: router one → fiber coupler → first optical module → FRAMER/FPGA → first optical module → optical switch → router two.The data that data that router two is accepted and router one send are in full accord.

The switching of transparent transmission track data and two circuits of blocking-up track data is carried out in FRAMER/FPGA.

In the SDH frame structure, overhead byte B1, B2, B3, V5 are respectively applied for the error code of keeping watch on regenerator section, multiplex section, higher order path and low order channel.Error code is kept watch on the even parity check of adopting bit interleaved parity mode (BIP), promptly guarantees that through check code the number of " 1 " in the transmission content is an even number.In this scheme; Switching between transparent transmission track data and the blocking-up track data; Configuration through changed information net load transmission channel realizes; Promptly the SDH frame is separated frame and framing does not receive circuit-switched the influence, also just do not had the error statistics of overhead byte B1, B2, B3, V5, thereby realize the transparent monitoring of circuit.

In addition, this scheme provides a light path transparent transmission path through optical switch, and the path of data flow is: router one → fiber coupler → optical switch → router two, and shown in dotted arrow among Fig. 5.Router two is accepted as the light signal that router one directly sends.When system's power down, can be launched automatically.

During practical implementation:

The switching of transparent transmission track data and blocking-up track data is disposed through change FRMAER/FPGA data path and to be realized.The switching of these two paths can be switched through the button of panel, and user's order is switched, also can be according to the automatic switchover that imposes a condition.

Optical switch adopts monostable 1*2 optical switch (NO LATCHING), promptly on pin, adds the driving voltage of continous-stable, is specifying the light path transmit optical signals, and driving voltage disappears, and changes into another path transmit optical signals.Through adopting monostable optical switch, make that light path transparent transmission path is activated automatically, does not influence the normal operation of Internet transmission line, the reliability of enhanced system when catastrophe failures such as power down occurring at the circuit handover module.

In this scheme, utilize the luminous power measuring ability of optical module self band, can detect data circulation flow path luminous power situation.Spectroscopic detectors (TAPD) is integrated light splitting coupler and high sensitive photodiode.In Fig. 6,7 embodiment, added spectroscopic detectors, be used to detect light path, further the reliability of enhanced system.

1) light path of second optical module detection: the overanxious module of data flow → second optical module.Detect alarm, the overanxious module failure of declarative data if block track data, will switch to the transparent transmission track data;

2) light path of first optical module detection: router one → fiber coupler → first optical module.Detect alarm, will start light path transparent transmission path;

3) spectroscopic detectors detects light path: router one → fiber coupler → photodetector.Detect alarm, explain that there is fault in light path transparent transmission path.

This scheme is docked test with the multiple speed port of how tame main flow routers such as CISCO, JUNIPER, and effect is very desirable.

The present invention does not relate to all identical with the prior art prior art that maybe can adopt of part and realizes.

Claims

1. a SONET/SDH network line is used the watch-dog that switches with nowhere to turn to alert; It comprises circuit handover module and data stream filtering module; It is characterized in that described circuit handover module comprises fiber coupler, optical switch, first optical module, at least one special chip framer FRAMER or the programmable chip FPGA and second optical module; Described fiber coupler is used to realize the shunt of light signal; To from an optical fiber, divide to two optical fiber from the light signal that router receives; One of which road light signal exports an input of optical switch to, and another road light signal converts the signal of telecommunication into through first optical module, and exports FRAMER/FPGA to; Carry out the SDH frame and separate frame, information payload Payload transmission and encapsulation framing; The signal of telecommunication after FRAMER/FPGA handles exports the data stream filtering module to after second optical module converts light signal into, data stream filtering module filtered data outputs to FRAMER/FPGA after converting the signal of telecommunication into through second optical module, carries out the SDH frame once more and separates frame, information payload transmission and encapsulation framing; Data output converts another input that exports optical switch behind the light signal to into through first optical module, and the output of optical switch is connected to the signal input part of end-to-end router.

2. SONET/SDH network line according to claim 1 is used the watch-dog that switches with nowhere to turn to alert; It is characterized in that this equipment also comprises spectroscopic detectors; Described spectroscopic detectors comprises light splitting coupler and photodiode; Spectroscopic detectors is monitored the output situation of fiber coupler between fiber coupler output and optical switch input.

3. SONET/SDH network line according to claim 1 is used the watch-dog that switches with nowhere to turn to alert, it is characterized in that described optical switch adopts monostable 1*2 optical switch.

4. SONET/SDH network line according to claim 1 is used the watch-dog that switches with nowhere to turn to alert; It is characterized in that described FRAMER/FPGA is two devices in the two-forty network; The one FRAMER/FPGA and the 2nd FRAMER/FPGA all are serially connected between first optical module and second optical module; Be used for that all signal is carried out the SDH frame and separate frame and encapsulation framing, and the transmission channel of information payload is provided; Be a device in the low rate network, be used for that signal is carried out the SDH frame and separate frame and encapsulation framing, and the transmission channel of information payload is provided.

5. a SONET/SDH network line is used with nowhere to turn to alert changing method; Application rights requires 1 described SONET/SDH network line to use the watch-dog that switches with nowhere to turn to alert; It is characterized in that transparent transmission track data path switches with blocking-up track data path carries out through FRMAER/FPGA; Accomplish configuration and the encapsulation framing that the SDH frame is separated frame, information payload transmission channel by FRMAER/FPGA, eliminate the error code data and promptly eliminate alarm.