CN105119652A - Optical cable main/standby routing controller - Google Patents

Abstract

The invention discloses an optical cable main-standby routing controller, comprising a first light-to-electricity conversion unit, a second light-to-electricity conversion unit, a 3R detection control unit, an equipment monitoring unit, an electric-to-light conversion unit, and a power supply unit; the light-to-electricity conversion unit receives the main The optical signal of the main optical cable sent by the optical cable is converted into the main electrical signal and sent to the 3R detection control unit, and at the same time sends the optical to electrical main status signal to the equipment monitoring unit; the equipment monitoring unit receives the optical to electrical main status signal After processing the optical-to-electrical standby status signal, the switch control signal is obtained and sent to the 3R detection control unit by the CPLD; the 3R detection control unit selects one electrical signal as the electrical signal required by the optical cable terminal equipment and sends it to the electrical-to-optical unit; The unit transmits the electrical signal to the light-receiving end of the optical cable terminal equipment and the equipment monitoring unit at the same time. The controller can effectively avoid the insertion loss of the optical signal, so that the optical signal can be transmitted without loss and ensure the safe operation of the optical cable communication.

Description

An active and standby routing controller for optical fiber cables

technical field

The invention relates to line protection in the field of optical fiber cable communication, in particular to a master and standby routing controller for optical cables.

Background technique

The SDH ring network protection is adopted in the current optical cable equipment switching technology, but it can't do anything about switching Ethernet services, and it can't do anything about point-to-point optical communication cables. The main/standby routing controller of the optical path based on the mechanical optical switch will inevitably cause connection loss at the mechanical connection, and the incomplete consistency of the mechanical size will cause the optical signal to have at least 3-5dbm insertion loss caused by optical splitting. The loss is large, and this loss may also lead to the interruption of the original optical cable transmission; the relay used in the mechanical optical switch needs to be driven by current to generate magnetic force to control the switch to operate, and all optical signals will inevitably lose information, so the optical signal switching takes a long time , the signal loss time is long, the service life and the environment are greatly limited, and it cannot adapt to the field conditions of various optical cable communications.

Contents of the invention

Aiming at the problems existing in the above-mentioned prior art, the present invention provides a master/standby routing controller for optical cables. The signal is transmitted without loss, ensuring the safe operation of optical cable communication.

In order to achieve the above object, the present invention provides an optical cable active/standby routing controller, including a first optical-to-electrical conversion unit, a second optical conversion unit, a 3R detection control unit, an equipment monitoring unit, an electrical-to-optical conversion unit, and a power supply unit;

The first light-to-electricity conversion unit receives the optical signal of the main optical cable sent by the main optical cable and converts it into the main electrical signal and sends it to the 3R detection control unit, and at the same time sends the light-to-electricity main status signal to the device monitoring unit;

The second optical-to-electricity conversion unit receives the optical signal of the backup optical cable sent by the backup optical cable and converts it into a backup electrical signal and sends it to the 3R detection control unit, and at the same time sends an optical-to-electricity standby status signal to the equipment monitoring unit;

The equipment monitoring unit is composed of a network management board, a wireless transmission module, a CPLD, and an MPU. The MPU receives the optical-to-electricity main status signal and the optical-to-electricity standby status signal for processing to obtain a switching control signal and uses the CPLD sends to the 3R detection control unit;

The 3R detection control unit receives the main electrical signal, the backup electrical signal and the switching control signal, and selects one of the main electrical signal and the backup electrical signal as the optical cable terminal equipment according to the switching control signal The required electrical signal is sent to the electro-optic unit;

The 3R detection control unit is composed of a switching unit and three 3R amplifying units, the switching unit is composed of a comparator, a microprocessor and an electronic switch, and the microprocessor sends a switching control signal according to the CPLD through the comparator Perform quality judgment and comparison on the main electrical signal and backup electrical signal processed by the 3R amplifying unit. If both the main electrical signal and the backup electrical signal exist, the current value in the main electrical signal and the backup electrical signal is selected by the comparator The larger one-way electrical signal is passed to the electronic switch as the electrical signal required by the optical cable terminal equipment for transmission through the 3R amplifying unit;

The 3R amplifying unit is used to retime, regenerate and reshape the electrical signal;

The electro-to-optical unit receives the electrical signal sent by the 3R detection control unit and transmits it to the light-receiving end of the optical cable terminal equipment; at the same time, sends the electro-to-optical status signal to the equipment monitoring unit;

The MPU of the equipment monitoring unit transmits the received electrical-to-optical signal status, optical-to-electrical main electrical signal and optical-to-electrical standby status signal to the network management board for conversion and transmission through the wireless transmission module and wireless mesh network. displaying to the monitoring host;

The power supply unit is used to provide system power for the first optical-to-electrical conversion unit, the second optical-to-electrical conversion unit, the 3R detection control unit, the equipment monitoring unit, and the electrical-to-electrical conversion unit.

The electronic switch is composed of two triode gate circuits, and the control electrode of the electronic switch is controlled by a microprocessor to output 0 or 1 to control on-off.

The wireless mesh network is composed of multiple wireless switches connected to each other.

The invention uses a 3R detection control unit, which shortens the switching time by 1/2 compared with the optical path protector of the traditional mechanical optical switch. Optical signal switching time reduces signal loss. The mechanical optical switch needs to be driven by a motor, the time of mechanical movement and the contact point are uncontrollable, and the service life is limited; while the electronic optical switch of the present invention does not need to be driven, which greatly reduces the switching time. In the present invention, a 3R amplifying unit is arranged at both input ends and output ends of the switching unit, and the 3R amplifying unit is used to retime the optical signal to eliminate the time domain distortion of the digital pulse and regenerate to ensure that the signal is transmitted in each optical cable The output power is reshaped to eliminate the pulse distortion caused by factors such as dispersion, which can effectively avoid the insertion loss of the optical signal, and at the same time amplify the optical signal to improve the intensity and quality of the optical signal, and will not introduce the insertion loss caused by light splitting, which will affect the line. Operation, using three 3R amplifying units, can effectively reduce loss and ensure the quality of signal transmission. The traditional mechanical optical switch is added to the system due to the inevitable insertion loss of the optical switch, and the system has no power supply amplification enhancement function, so it cannot be used when the original system does not have sufficient optical power redundancy, and at the same time increases the contact point. Light reflections and light effects. The present invention can be widely used in private line services such as electric power, telecommunications, banking, public security, conference television, or other important data services, and provides users with a highly reliable and high-performance optical signal protection transmission path. Supported services include: Gigabit main line backup system, SDH/PDH/FC/POS optical channel protection system, image line monitoring system, etc.

To sum up the above, the present invention uses a 3R detection control unit to realize ultra-high-speed switching, and performs high-speed switch selection for important two-way optical signal circuits, and performs 3R amplification on the selected optical signal and the selected optical signal. The electrical switching is completed within a short time, which is far better than the 50ms switching time of the mechanical optical switch.

Description of drawings

Fig. 1 is a block diagram of the present invention;

Fig. 2 is a structural block diagram of the middle switching unit of the present invention.

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing.

As shown in Figures 1 and 2, an optical cable active/standby routing controller includes a first optical-to-electrical conversion unit, a second optical conversion unit, a 3R detection control unit, an equipment monitoring unit, an electrical-to-optical conversion unit, and a power supply unit;

The first light-to-electricity conversion unit receives the optical signal of the main optical cable sent by the main optical cable and converts it into the main electrical signal and sends it to the 3R detection control unit, and at the same time sends the light-to-electricity main status signal to the device monitoring unit;

The second optical-to-electricity conversion unit receives the optical signal of the backup optical cable sent by the backup optical cable and converts it into a backup electrical signal and sends it to the 3R detection control unit, and at the same time sends an optical-to-electricity standby status signal to the equipment monitoring unit;

The two optical-to-electrical units are to facilitate the processing of signals by the hardware circuit. It consists of two parts: an optical subassembly (OSA) and an electrical subassembly (ESA). First, the optical subassembly is made of gallium arsenide (GaAs), indium phosphide (InP), indium gallium arsenide (InGaAs), etc. are used as light-emitting and light-detecting materials to form optical signals; the electronic sub-module contains a transmission driver IC and a receiver driver IC, which are used to drive laser diodes It forms an electrical signal with the photodetector diode; so that the optical signal from the main route and the backup route can be converted into an electrical signal.

The equipment monitoring unit is composed of a network management board, a wireless transmission module, a CPLD, and an MPU. The MPU receives the optical-to-electricity main status signal and the optical-to-electricity standby status signal for processing to obtain a switching control signal and uses the CPLD sends to the 3R detection control unit;

The 3R detection control unit receives the main electrical signal, the backup electrical signal and the switching control signal, and selects one of the main electrical signal and the backup electrical signal as the optical cable terminal equipment according to the switching control signal The required electrical signal is sent to the electro-optic unit;

If one of the electrical signals of the main routing and the backup routing is lost, the other electrical signal is passed to the electronic switch as the electrical signal required by the optical cable terminal equipment for transmission; if the electrical signal of the main routing and the backup routing are both If it is lost, the electronic switch has no action.

The 3R detection control unit is composed of a switching unit and three 3R amplifying units, the switching unit is composed of a comparator, a microprocessor and an electronic switch, and the microprocessor sends a switching control signal according to the CPLD through the comparator Perform quality judgment and comparison on the main electrical signal and backup electrical signal processed by the 3R amplifying unit. If both the main electrical signal and the backup electrical signal exist, the current value in the main electrical signal and the backup electrical signal is selected by the comparator The larger one-way electrical signal is passed to the electronic switch as the electrical signal required by the optical cable terminal equipment for transmission through the 3R amplifying unit;

The 3R amplifying unit is used for retiming, regenerating and reshaping of electrical signals; the 3R amplifying unit uses Maxim3872 as the main processing chip to provide discrete rate, multiple rates and continuously adjustable clock and data recovery for equipment design The integrated circuit can easily integrate applications with unknown protocols, and automatically locks the input optical-to-electrical data stream at a rate of 12.3Mbps to 2.7Gbps without a reference clock, and reports the obtained optical signal data rate through the serial interface.

The electro-to-optical unit receives the electrical signal sent by the 3R detection control unit and transmits it to the light-receiving end of the optical cable terminal equipment; at the same time, sends the electro-to-optical status signal to the equipment monitoring unit;

The MPU of the equipment monitoring unit transmits the received electrical-to-optical signal status, optical-to-electrical main electrical signal and optical-to-electrical standby status signal to the network management board for conversion and transmission through the wireless transmission module and wireless mesh network. displaying to the monitoring host;

The power supply unit is used to provide system power for the first optical-to-electrical conversion unit, the second optical-to-electrical conversion unit, the 3R detection control unit, the equipment monitoring unit, and the electrical-to-electrical conversion unit. The power supply unit is AC 220V or/and DC-48V, and then outputs the power required by each unit; ensure that the protector receives AC 220V and DC-48 power and backup power supply at the same time, ensuring the stable and reliable operation of the protector.

The electronic switch is composed of two triode gate circuits, and the control electrode of the electronic switch is controlled by a microprocessor to output 0 or 1 to control on-off.

The wireless mesh network is composed of multiple wireless switches connected to each other. Wireless mesh network communication has the advantages of wide application range and high reliability.

The 3R detection control unit is used, which shortens the switching time by 1/2 compared with the optical path protector of the traditional mechanical optical switch. The instantaneous switching time of the electronic switch is less than 10ms, the lost signal is less than 10ms, and the communication service is not interrupted, thereby shortening the optical signal. Switching time reduces signal loss. The mechanical optical switch needs to be driven by a motor, the time of mechanical movement and the contact point are uncontrollable, and the service life is limited; while the electronic optical switch of the present invention does not need to be driven, which greatly reduces the switching time. In the present invention, a 3R amplifying unit is arranged at both input ends and output ends of the switching unit, and the 3R amplifying unit is used to retime the optical signal to eliminate the time domain distortion of the digital pulse and regenerate to ensure that the signal is transmitted in each optical cable The output power is reshaped to eliminate the pulse distortion caused by factors such as dispersion, which can effectively avoid the insertion loss of the optical signal, and at the same time amplify the optical signal to improve the intensity and quality of the optical signal, and will not introduce the insertion loss caused by light splitting, which will affect the line. Operation, using three 3R amplifying units, can effectively reduce loss and ensure the quality of signal transmission. The traditional mechanical optical switch is added to the system due to the inevitable insertion loss of the optical switch, and the system has no power supply amplification enhancement function, so it cannot be used when the original system does not have sufficient optical power redundancy, and at the same time increases the contact point. Light reflections and light effects. The present invention can be widely used in private line services such as electric power, telecommunications, banking, public security, conference television, or other important data services, and provides users with a highly reliable and high-performance optical signal protection transmission path. Supported services include: Gigabit main line backup system, SDH/PDH/FC/POS optical channel protection system, image line monitoring system, etc. The 3R detection control unit is used to realize ultra-high-speed switching, and high-speed switching and selection of important two-way optical signal circuits are performed, and 3R amplification is performed on the selected optical signal and the selected optical signal, and the electrical switching is completed within microseconds. , far better than the 50ms switching time of mechanical optical switches.

In the specific networking implementation, if multi-channel switching is required, a unitized system structure can be adopted, so that the first and second photoelectric conversion units, electro-optical conversion units, 3R detection control units, equipment monitoring units, power supply units and monitoring hosts form a single organic whole. Insert two optical cable active and standby routing controllers between the two optical end devices at both ends, and connect a pair of protective standby optical cables between the optical cable active and standby routing controllers, that is, it can be realized between the active optical cable and the standby optical cable. Lossless automatic instantaneous switching. And it can remotely monitor the status of the equipment in real time, and effectively protect the stable operation of the power communication equipment.

Claims (3)

1. the active and standby path control deivce of optical cable, comprises that the first light turns electric unit, the second optical conversion element, monitoring of tools unit, electricity turn light unit and power subsystem, it is characterized in that, also comprises 3R and detect control unit;

Described first light turns electric unit and receives primary optical fiber cables signal that primary optical cable sends and be converted to the primary signal of telecommunication and send to described 3R to detect control unit, sends light simultaneously and turns electric master state signal to described monitoring of tools unit;

Described second light turns electric unit and receives the reserve cable light signal that sends of reserve cable and be converted to standby electricity signal and send to described 3R to detect control unit, sends light simultaneously and turns electric stand-by state signal to described monitoring of tools unit;

Described monitoring of tools unit is made up of webmaster plate, wireless transport module, CPLD and MPU, and described MPU receives that described light turns electric master state signal, light turns electric stand-by state signal and carries out processing rear acquisition switch-over control signal and send to described 3R to detect control unit by described CPLD;

Described 3R detects control unit and receives the described primary signal of telecommunication, standby electricity signal and switch-over control signal, and selects the described primary signal of telecommunication and the standby electricity signal Zhong mono-road signal of telecommunication to send to described electricity to turn light unit as the signal of telecommunication needed for optical fiber cable termination equipment according to described switch-over control signal;

Described 3R detects control unit and is made up of switch unit and three 3R amplifying units, described switch unit is by comparator, microprocessor and electronic switch composition, the switch-over control signal that microprocessor is sent according to described CPLD by comparator carries out Quality estimation to through the primary signal of telecommunication of 3R amplifying unit process and standby electricity signal and compares, if the primary signal of telecommunication and standby electricity signal all exist, then by comparator to select in the primary signal of telecommunication and standby electricity signal current value comparatively the great mono-road signal of telecommunication transmit through 3R amplifying unit to electronic switch as electrical signal transfer needed for optical fiber cable termination equipment,

Described 3R amplifying unit is used for when resetting the signal of telecommunication, heavily regenerate and weigh Shape correction;

Described electricity turns light unit and receives described 3R and detect the electrical signal transfer that sends of control unit to the receipts light end of described optical fiber cable termination equipment; Electricity is turned light state signal simultaneously and send to described monitoring of tools unit;

Received electricity is turned light signal state by the MPU of described monitoring of tools unit, light turns the electric primary signal of telecommunication and light turn electric stand-by state signal transmission give described webmaster plate carry out changing and send to described monitoring host computer to show through described wireless transport module, wireless mesh network;

Described power subsystem be used for for described first light turn electric unit, the second light turns electric unit, 3R detects control unit, monitoring of tools unit and electricity and turns light unit and provide system power supply.

2. the active and standby path control deivce of a kind of optical cable according to claim 1, is characterized in that, electronic switch is made up of two triode gate circuit, and the control electrode of electronic switch is exported by Microprocessor S3C44B0X 0 or 1 to control break-make.

3. the active and standby path control deivce of a kind of optical cable according to claim 1 and 2, is characterized in that, described wireless mesh network is interconnected by multiple wireless exchange board and forms.