CN108540231B - A kind of adaptive OLT optical module and its control method - Google Patents
A kind of adaptive OLT optical module and its control method Download PDFInfo
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- CN108540231B CN108540231B CN201810287906.4A CN201810287906A CN108540231B CN 108540231 B CN108540231 B CN 108540231B CN 201810287906 A CN201810287906 A CN 201810287906A CN 108540231 B CN108540231 B CN 108540231B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/40—Transceivers
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Abstract
The present invention relates to optical communication technology fields, provide a kind of adaptive OLT optical module and its control method.Wherein optical module includes analog switch and self-resetting circuit, the control port of electric connector connects microprocessor, for the control signal of periphery to be transferred to microprocessor, 1 signal port of control and 2 signal ports of control of electric connector are connected to the gating interface of analog switch, the gating control interface of analog switch receives the signal from microprocessor, and 1 signal of control or 2 signals of control are passed to microprocessor by selection；Self-resetting circuit is produced from reset signal according to the burst electric signal received, and to receiver is given after the burst Electric signal processing received, uplink signal is passed to electric connector by receiver.The present invention realizes mixed insertion using a kind of realization of OLT optical module on GPON network line card single-deck or EPON network line card single-deck, improves networking flexibility, reduces O&M cost.
Description
[technical field]
The present invention relates to optical communication technology fields, more particularly to a kind of adaptive OLT optical module and its control method.
[background technique]
Passive optical network (Passive Optical Network, referred to as are as follows: PON) network is by optical line terminal
(optical line terminal, write a Chinese character in simplified form are as follows: OLT), optical network unit (Optical Network Unit, writes a Chinese character in simplified form are as follows:
ONU it) is formed with optical distribution network (Optical Distribution Network, write a Chinese character in simplified form are as follows: ODN), since PON network technology has
There are the significant advantages such as high-performance, O&M cost be low, has become the mainstream of broadband access at home.Built fiber broadband at present
In access net, Ethernet passive optical network (Ethernet Passive Optical Network, write a Chinese character in simplified form are as follows: EPON) and lucky ratio
Special Gigabit Passive Optical Network (Gigabit-Capable PON, writes a Chinese character in simplified form are as follows: GPON) occupies most of market share respectively.
The OLT optical module internal structure of GPON network is as shown in Figure 1, including electric connector, microprocessor, transmitter, connecing
Receive device, optical device.The end Vcc of electric connector is respectively connected to transmitter, receiver, microprocessor, for being transmitter, receiving
Device and microprocessor power supply.The end COM of electric connector is connected to microprocessor, passes to micro process for that will control signal
Device.The Trigger signal of electric connector is connected to microprocessor, for carrying out received signal strength indicator to uplink burst signal
(Received Signal Strength Indication, write a Chinese character in simplified form are as follows: RSSI) sampling reports；The Reset signal of electric connector
It is connected to receiver, for realizing burst decision level is established in a short time to uplink burst signal；The GPON of electric connector
The downlink signal port end TX, the GPON uplink signal port end RX are respectively connected to transmitter, receiver, are respectively used to transmission downlink
Signal and uplink signal.Microprocessor is additionally coupled to transmitter and receiver, so that the work of control transmitter and receiver is joined
Number, state.Optical device is respectively connected to transmitter and receiver, for downlink signal to be converted to corresponding GPON downlink center wave
Long optical signal, and uplink signal is converted by the optical signal of its received corresponding GPON uplink central wavelength.Optical device is also logical
It crosses optical interface and sends and receives optical signal, the central wavelength that wherein optical device sends optical signal is 1490nm, receives optical signal
Central wavelength is 1310nm；The downlink working rate 2.488Gbps of transmitter, uplink operating rate is 1.244Gbps.
The OLT optical module internal structure of EPON network is as shown in Fig. 2, including electric connector, microprocessor, transmitter, connecing
Receive device, optical device.The end Vcc of electric connector is respectively connected to transmitter, receiver, microprocessor, for being transmitter, receiving
Device and microprocessor power supply.The end COM of electric connector is connected to microprocessor, passes to micro process for that will control signal
Device.The Trigger signal of electric connector is connected to microprocessor, reports for carrying out RSSI sampling to uplink burst signal；Electricity
The EPON downlink signal port end TX, the EPON uplink signal port end RX of connector are respectively connected to transmitter, receiver, respectively
For transmitting downlink signal and uplink signal.Microprocessor is additionally coupled to transmitter and receiver, so as to control transmitter and connects
Receive running parameter, the state of device.Optical device is respectively connected to transmitter and receiver, for downlink signal to be converted to correspondence
The optical signal of EPON downlink center wavelength, and uplink letter is converted by the optical signal of its received corresponding EPON uplink central wavelength
Number.Optical device also passes through optical interface and sends and receives optical signal, and the central wavelength that wherein optical device sends optical signal is 1490nm,
The central wavelength for receiving optical signal is 1310nm；The downlink working rate 1.25Gbps of transmitter, uplink operating rate are
1.25Gbps。
The OLT optical module of above-mentioned PON network in the prior art has following defects that existing GPON network and EPON network
OLT optical module cannot be used interchangeably, poor universality, cause the waste of resource and cost, while OLT optical module type excessively can also
Cause operator's maintenance inconvenient.
In consideration of it, overcoming defect present in the prior art is the art urgent problem to be solved.
[summary of the invention]
The technical problem to be solved by the present invention is existing GPON network and EPON network OLT optical module cannot be used interchangeably,
Poor universality causes the waste of resource and cost, while OLT optical module type excessively also will cause operator's maintenance inconvenience.
The present invention adopts the following technical scheme:
In a first aspect, the present invention provides a kind of adaptive OLT optical module, including electric connector, microprocessor, transmitting
Device, receiver and optical device, wherein microprocessor is separately connected the transmitter and receiver, and optical module further includes that simulation is opened
Pass and self-resetting circuit, specific:
The control port of the electric connector connects the microprocessor, described for the control signal of periphery to be transferred to
Microprocessor, wherein the control signal assigns instruction for microprocessor, controls the transmitter, receiver and/or simulation
The running parameter of switch；
1 signal port of control and 2 signal ports of control of the electric connector are connected to the gating interface of analog switch, mould
The gating control interface of quasi- switch receives the signal from microprocessor, and selection passes to 1 signal of control or 2 signals of control micro-
Processor；
The self-resetting circuit is produced from reset signal according to the burst electric signal received, to the burst telecommunications received
Number processing after give the receiver, the uplink signal is passed into the electric connector by the receiver.
Preferably, when the optical module is that SFP is encapsulated, 1 signal port of the control and 2 signal ports of control are respectively
7th pin of its electric connector and the 9th pin of electric connector.
Preferably, in GPON OLT, the 7th foot correspondence for controlling 1 signal port and electric connector represents reset signal
Reset, the 9th foot correspondence for controlling 2 signal ports and electric connector represent trigger signal Trigger；In EPON OLT, control
7th foot of 1 signal port and electric connector is corresponding to represent the triggering of Trigger signal, controls the of 2 signal ports and electric connector
9 feet correspondence represents earth signal.
Preferably, the analog switch is specially chip TS5A3157, and 1 signal port of control is connected to chip TS5A3157
NO pin, 2 signal ports of control are connected to the NC pin of chip TS5A3157；The COM pin of chip TS5A3157 is connected to
Microprocessor provides Trigger signal to microprocessor；The IN pin of chip TS5A3157 is connected to microprocessor, receives micro-
Processor configuration-direct, the COM pin for completing chip TS5A3157 be connected to the NO pin of chip TS5A3157 or with
The connection of chip NC pin.
Preferably, microprocessor receives the instruction from system, and when system works in GPON mode, microprocessor is opened
The end the IN input low level signal of chip TS5A3157 is closed, chip NC pin is connected with COM pin, makes 9 feet of electric connector
Trigger is signally attached to the Trigger input terminal of microprocessor；When system works in EPON mode, microprocessor is opened
The end the IN input high level signal of chip TS5A3157 is closed, chip NO pin is connected with COM pin, makes 7 feet of electric connector
Trigger is signally attached to the Trigger input terminal of microprocessor.
Preferably, the self-resetting circuit includes capacitor C1 and capacitor C2, resistance R1, resistance R2, resistance R3 and resistance R4,
Comparator 71 and derailing switch 72, specific:
The electric signal of optical device is coupled to receiver by capacitor C1 and capacitor C2, wherein resistance R1, resistance R2, resistance R3
It is connected in parallel on capacitor C1 and/or capacitor C2 accordingly close to one section of receiver, so that capacitor C1, capacitor C2, resistance R1 with resistance R4
Large time constant RC circuit is formed with resistance R2, capacitor C1, capacitor C2, resistance R3 and resistance R4 form small time constant charge and discharge
Circuit；
Wherein, resistance R3 and R4 connection switch device 72, the derailing switch 72 is for controlling the capacitor C1, capacitor C2, electricity
The small time constant charge-discharge circuit of resistance R3 and resistance R4 composition enters working condition or is detached from working condition；
Wherein, the input terminal of the comparator 71 is separately connected the capacitor C1 and C2 close to the connecting line of receiver-side
On, and the output end of the comparator 71 is connected with the switch control port of the derailing switch 72.
Second aspect, the present invention also provides a kind of control method of adaptive OLT optical module, the insertions of OLT optical module
When GPON system equipment, microprocessor receives the instruction from system, and microprocessor controls analog switch, makes the 9 of electric connector
Foot Trigger is signally attached to the Trigger input terminal of microprocessor, and the control method includes:
Uplink optical signal is converted into uplink electrical signals by optical device, and uplink electrical signals are coupled to by capacitor C1 and capacitor C2
Receiver；Wherein capacitor C1, capacitor C2, resistance R1 and resistance R2 form large time constant RC circuit, capacitor C1, capacitor C2, electricity
It hinders R3 and resistance R4 and forms small time constant charge-discharge circuit；
When optical device is not received by optical signal, the electrical signal amplitude of optical device output is small, passes through capacitor C1 and capacitor
The electrical signal amplitude that C2 coupling comes is also smaller, and comparator 71 gives 72 input low level of derailing switch, is closed derailing switch 72, capacitor
C1, capacitor C2, resistance R3 and resistance R4 form small time constant charge-discharge circuit and enter working condition；
When optical device receives the preamble portion of burst upstream signal, the output amplitude of optical device becomes larger, and passes through electricity
Hold the electrical signal amplitude that C1 and capacitor C2 coupling comes to become larger, comparator 71 exports high level to derailing switch 72, makes derailing switch 72
It disconnects, the work of large time constant RC circuit is formed by capacitor C1, capacitor C2, resistance R1 and resistance R2.
Preferably, when OLT optical module insertion EPON system equipment, microprocessor receives the instruction from system, makes to be electrically connected
The 7 foot Trigger for connecing device are signally attached to the Trigger input terminal of microprocessor, the control method further include:
Uplink optical signal is converted into uplink electrical signals by optical device, and uplink electrical signals are coupled to by capacitor C1 and capacitor C2
Receiver；Wherein capacitor C1, capacitor C2, resistance R1 and resistance R2 form large time constant RC circuit, capacitor C1, capacitor C2, electricity
It hinders R3 and resistance R4 and forms small time constant charge-discharge circuit；
When optical device is not received by optical signal, the electrical signal amplitude of optical device output is small, passes through capacitor C1 and capacitor
The electrical signal amplitude that C2 coupling comes is also smaller, and comparator 71 gives 72 input low level of derailing switch, is closed derailing switch 72, capacitor
C1, capacitor C2, resistance R3 and resistance R4 form small time constant charge-discharge circuit and enter working condition；
When optical device receives the preamble portion of burst upstream signal, the output amplitude of optical device becomes larger, and passes through electricity
Hold the electrical signal amplitude that C1 and capacitor C2 coupling comes to become larger, comparator 71 exports high level, disconnects derailing switch 72, by capacitor
C1, capacitor C2, resistance R1 and resistance R2 composition large time constant RC circuit work.
Preferably, the uplink signal port RX connection receiver of the electric connector, described in receiver connection
Self-resetting circuit, the self-resetting circuit connect the optical device；The optical device is by cardiac wave in received corresponding uplink
The optical signal of long 1310nm is converted to electric signal and passes to the self-resetting circuit；The self-resetting circuit is according to receiving
Electric signal is produced from reset signal, will be described by the receiver to the receiver is given after the Electric signal processing received
Uplink signal passes to the electric connector, realizes the transmitting and receive capabilities of the optical signal of OLT module.
Compared with prior art, the beneficial effects of the present invention are:
Adaptive OLT optical module of the invention includes that electric connector, microprocessor, transmitter, receiver, simulation are opened
Pass, self-resetting circuit and optical device.Microprocessor receives the configuration-direct that OLT system is sent by electric connector, controls respectively
Each transmitter and receiver operation in optical module processed, and matched OLT optical module pin by analog switch according to network type
It is set to GPON OLT optical module or EPON OLT optical module, adaptive OLT optical module of the invention is made both work to be suitble to exist
GPON network, and be suitble to work in EPON network, in this way using a kind of OLT optical module can in GPON network line card single-deck or
Realize that mixed insertion, OLT optical module no longer divide into GPON OLT optical module or EPON OLT optical module on EPON network line card single-deck,
The design that a variety of different PON network can be supported to apply, improves networking flexibility, reduces the O&M cost of operator.
[Detailed description of the invention]
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the OLT optical module schematic diagram of internal structure of the network of GPON in the prior art provided by the invention；
Fig. 2 is the OLT optical module schematic diagram of internal structure of the network of EPON in the prior art provided by the invention；
Fig. 3 is the structural schematic diagram of the adaptive OLT optical module of one kind provided in an embodiment of the present invention；
Fig. 4 is the golden finger functional schematic of the GPON of SFP encapsulation provided in an embodiment of the present invention；
Fig. 5 is the golden finger functional schematic of the EPON of SFP encapsulation provided in an embodiment of the present invention；
Fig. 6 is the pin function schematic diagram of chip TS5A3157 provided in an embodiment of the present invention；
Fig. 7 is analog switch operation schematic diagram provided in an embodiment of the present invention；
Fig. 8 is working principle diagram of the self-resetting circuit provided in an embodiment of the present invention in adaptive OLT optical module.
In figure: 1, electric connector；2, microprocessor；3, transmitter；4, receiver；5, optical device；6, analog switch；7, certainly
Reset circuit；71, comparator；72, derailing switch.
[specific embodiment]
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
In the description of the present invention, term "inner", "outside", " longitudinal direction ", " transverse direction ", "upper", "lower", "top", "bottom" etc. refer to
The orientation or positional relationship shown be based on the orientation or positional relationship shown in the drawings, be merely for convenience of description the present invention rather than
It is required that the present invention must be constructed and operated in a specific orientation, therefore it is not construed as limitation of the present invention.
In various embodiments of the present invention, the meaning for function that there are two types of the expressions of symbol "/" while tool, such as " the second entry/exit light
Mouthful " show that the port both can also go out light with entering light.And the front and back connected by the symbol is then shown for symbol " A and/or B "
Combination between object includes " A ", " B ", " A and B " three kinds of situations, such as " back-scattering light and/or reflected light ", then shows it
It can express individual " back-scattering light ", individual " reflected light ", and in " back-scattering light and reflected light " three kinds of meanings
It is one of any.
By reference to standard, it is found that from the point of view of GPON optical line terminal and EPON OLT optical module compare, two types
Optical module used in uplink and downlink wavelength it is identical, electric connector mechanical dimension is identical, therefore optical path is identical, pipe used in optical module
Shell shape and golden finger size are identical.
GPON OLT and EPON OLT optical module is in uplink and downlink rate, and main difference is in downstream rate, under GPON
Scanning frequency rate is 2.488Gbps, and EPON downstream rate is 1.25Gbps；With the promotion of technological progress and material performance, nowadays
GPON OLT optical module and transmitter in EPON OLT optical module and optical device can directly work in 2.488Gbps or
1.25Gbps under rate.Therefore, angle is matched from signal source, to realize that the optical module of compatible GPON and EPON provides possibility
Property.
The pattern of both GPON system and EPON system transmission is distinguishing, the pattern spectrum component of GPON system transmission
It is broad compared with the pattern spectrum component of EPON system, and there are also identical continuation code (the Consecutive Identical of minimum 72 bits
Digit is abbreviated as CID) requirement, therefore (i.e. optical device connects in internal TIA for GPON OLT optical module and EPON OLT optical module
The trans-impedance amplifier of receiving end) and receiver between RC coupling matching on have any different.
The upstream rate of the two is essentially identical, but the temporal aspect of the two uplink burst signal has a difference, in GPON system
The guard time and preamble length of row burst signal will be well below EPON systems, and generally only tens nanoseconds, lead code are believed
It is data segment signal after number.In GPON OLT optical module, capacitor is used between optical device and receiver designed by the present invention
AC coupled is carried out, in order to make optical module be capable of handling guard time and the shorter uplink burst signal of preamble length, is used
The RC circuit of two groups of different time constants.In the lead code period, system equipment can issue Reset to GPON OLT optical module
(reset) signal, small time constant RC circuit are devoted oneself to work, and burst mode receiver is enable quickly to establish burst level；In data
Duan You little time constant RC circuit switches to large time constant RC circuit, and burst mode receiver is made to can adapt to GPON system pattern
The feature of frequency spectrum broadness.And in EPON system, due to guard time and preamble length long enough, generally there are several hundred nanoseconds,
Optical module does not need to be additionally provided external reset signal, and the pattern frequency spectrum of EPON system is relatively concentrated, it is only necessary to provide one group
RC circuit.It devises a derailing switch in the present invention to realize above-mentioned characteristic requirements, realizes compliance.Further
, the present invention also needs to overcome the difference in the two golden finger pin definitions, so that GPON OLT optical module and EPON OLT light
Module being capable of interfix use.
In addition, as long as technical characteristic involved in the various embodiments of the present invention described below is each other not
Constituting conflict can be combined with each other.
Embodiment 1:
The embodiment of the present invention 1 provides a kind of adaptive OLT optical module, as shown in Figure 3 and Figure 7, including electric connector,
Microprocessor, transmitter, receiver and optical device, wherein microprocessor is separately connected the transmitter and receiver, optical module
It further include analog switch and self-resetting circuit, specifically；
The control port of the electric connector connects the microprocessor, described for the control signal of periphery to be transferred to
Microprocessor, wherein the control signal assigns instruction for microprocessor, controls the transmitter, receiver and/or simulation
The running parameter of switch；
1 signal port of control and 2 signal ports of control of the electric connector are connected to the gating interface of analog switch, mould
The gating control interface of quasi- switch receives the signal from microprocessor, and selection passes to 1 signal of control or 2 signals of control micro-
Processor；
The self-resetting circuit is produced from reset signal according to the burst electric signal received, to the burst telecommunications received
Number processing after give the receiver, the uplink signal is passed into the electric connector by the receiver.
The embodiment of the present invention receives the configuration-direct that OLT system is sent by electric connector by microprocessor, controls respectively
Each transmitter and receiver operation in optical module processed, and matched OLT optical module pin by analog switch according to network type
It is set to GPON OLT optical module or EPON OLT optical module, adaptive OLT optical module of the invention is made both work to be suitble to exist
GPON network, and it is suitble to work in EPON network, it can be realized using a kind of OLT optical module in GPON network line card list in this way
Realize that mixed insertion, OLT optical module no longer divide into GPON OLT optical module or EPON OLT light on disk or EPON network line card single-deck
Module, the design that a variety of different PON network can be supported to apply, improves networking flexibility, reduces the O&M cost of operator.
In embodiments of the present invention, the uplink signal port RX connection receiver of the electric connector, the reception
Device connects the self-resetting circuit；The self-resetting circuit connects the optical device；The optical device is by received correspondence
The optical signal of uplink central wavelength is converted to electric signal and passes to the receiver, by the receiver by the uplink signal
Pass to the electric connector.
The downlink signal port TX connection transmitter of the electric connector, for downlink signal to be passed to the hair
Emitter；The downlink signal is passed into the optical device by the transmitter, the optical device carries out the downlink signal
Photoelectric conversion and the downlink optical signal for emitting corresponding downlink center wavelength.
In conjunction with the embodiment of the present invention, when the optical module is that SFP is encapsulated, 2 signals of 1 signal port of the control and control
Port is respectively the 7th pin of its electric connector and the 9th pin of electric connector.As shown in Figure 4 and Figure 5, respectively SFP is encapsulated
The golden finger of GPON and EPON, which indicates, in optical module is intended to.
As shown in figure 4, the 7th foot correspondence for controlling 1 signal port and electric connector represents reset signal in GPON OLT
Reset, the 9th foot correspondence for controlling 2 signal ports and electric connector represent trigger signal Trigger；In EPON OLT, control
7th foot of 1 signal port and electric connector is corresponding to represent the triggering of Trigger signal, controls the of 2 signal ports and electric connector
9 feet correspondence represents earth signal.In embodiments of the present invention, microprocessor need to only obtain trigger signal in the prior art,
Reset signal does not need to obtain (prior art then needs to obtain from outside) from outside, but is produced by the self-resetting circuit of module
Self-resetting signal of the raw effect with external Reset signal.
As shown in Figure 6 and Figure 7, in embodiments of the present invention, there can be the list of gate action using TS5A3157 etc
Double-pole double throw switch controls the NO pin that 1 signal port is connected to chip TS5A3157 as analog switch, controls 2 signal ports
It is connected to the NC pin of chip TS5A3157；The COM pin of chip TS5A3157 is connected to microprocessor, provides to microprocessor
Trigger signal；The IN pin of chip TS5A3157 is connected to microprocessor, receives microprocessor configuration-direct, for completing
The COM pin of chip TS5A3157 is connected to the NO pin of chip TS5A3157 or is connected to chip NC pin.
In embodiments of the present invention, the adaptive OLT optical module is in use, usually microprocessor is received from being
The instruction of system, when system works in GPON mode, microprocessor is believed to the end the IN input low level of switch chip TS5A3157
Number, chip NC pin is connected with COM pin, and 9 feet (as shown in Figure 4) Trigger of electric connector is made to be signally attached to micro process
The Trigger input terminal of device；When system works in EPON mode, microprocessor is inputted to the end IN of switch chip TS5A3157
High level signal, chip NO pin are connected with COM pin, and 7 foot Trigger of electric connector is made to be signally attached to microprocessor
Trigger input terminal.
In the embodiment of the present invention, the specifically used burst that the self-resetting circuit 7 is passed over according to optical device 5 in the process
Electric signal is produced from reset signal, which handles the burst electric signal of uplink, keeps burst mode receiver fast
Burst threshold level is found in run-up, not only meets the timing requirements of GPON uplink burst signal, more meets EPON uplink burst signal
Timing requirements, make both to be able to satisfy in RC circuit between TIA (trans-impedance amplifier of optical device receiving end) and receiver
The parameter request of GPON OLT optical module, also meets the parameter request of EPON OLT optical module, eliminates both GPON and EPON
Difference in RC parameter.Wherein, burst electric signal is commonly referred to as the optical signals optical device conversion that OLT optical module receives
At electric signal.
In embodiments of the present invention, the uplink signal port RX connection receiver of the electric connector, the reception
Device connects the self-resetting circuit, and the self-resetting circuit connects the optical device；The optical device is by received correspondence
The optical signal of uplink central wavelength 1310nm is converted to electric signal and passes to the self-resetting circuit；The self-resetting circuit root
It is produced from reset signal according to the electric signal received, to the receiver is given after the Electric signal processing received, is connect by described
It receives device and the uplink signal is passed into the electric connector, realize the transmitting and receive capabilities of the optical signal of OLT module.
Embodiment 2:
After providing adaptive OLT optical module described in embodiment 1, the embodiment of the invention also provides a kind of adaptive
The control method for the OLT optical module answered, the control method can based on but be not limited to provided by embodiment 1 adaptive
OLT optical module completes application, and when OLT optical module is inserted into GPON system equipment, microprocessor receives the instruction from system, micro- place
It manages device and controls analog switch, 9 foot Trigger of electric connector is made to be signally attached to the Trigger input terminal of microprocessor, refer to
Structural schematic diagram as shown in Figure 7 and Figure 8, the control method include:
Uplink optical signal is converted into uplink electrical signals by optical device, and uplink electrical signals are coupled to by capacitor C1 and capacitor C2
Receiver；Wherein capacitor C1, capacitor C2, resistance R3 and resistance R4 form small time constant RC circuit and (are referred to as the small time
Constant charge-discharge circuit), capacitor C1, capacitor C2, resistance R1 and resistance R2 form large time constant charge-discharge circuit；
When optical device is not received by optical signal, the electrical signal amplitude of optical device output is small, passes through capacitor C1 and capacitor
The electrical signal amplitude that C2 coupling comes is also smaller, and comparator 71 gives 72 input low level of derailing switch, is closed derailing switch 72, capacitor
C1, capacitor C2, resistance R3 and resistance R4 form small time constant charge-discharge circuit and enter working condition；
When optical device receives the preamble portion of burst upstream signal, the output amplitude of optical device becomes larger, and passes through electricity
Hold the electrical signal amplitude that C1 and capacitor C2 coupling comes to become larger, due to the output time-lag action of of comparator itself, can generally produce
The delay of raw about 10 nanoseconds, comparator 71 export high level to derailing switch 72 after about 10 nanoseconds, disconnect derailing switch 72, by
Capacitor C1, capacitor C2, resistance R1 and resistance R2 composition large time constant RC circuit work.
Since preamble portion is all made of 1010 alternate low and high level signals, frequency is higher, and level is symmetrical, electricity
Hold C1, capacitor C2, resistance R3 and resistance R4 form small time constant charge-discharge circuit and got higher in lead code section comparator by low
Burst level can be quickly established when work in this period.When derailing switch 72 disconnect after, by capacitor C1, capacitor C2, resistance R1 and
When resistance R2 forms the work of large time constant RC circuit, since charge and discharge electrical time constant is larger, it is adapted to data segment GPON system
The feature for pattern frequency spectrum broadness of uniting.
Microprocessor receives the configuration-direct that OLT system is sent by electric connector in embodiments of the present invention, controls respectively
Each transmitter and receiver operation in optical module processed, and matched OLT optical module pin by analog switch according to network type
It is set to GPON OLT optical module or EPON OLT optical module, adaptive OLT optical module of the invention is made both work to be suitble to exist
GPON network, and it is suitble to work in EPON network, it can be realized using a kind of OLT optical module in GPON network line card list in this way
Realize that mixed insertion, OLT optical module no longer divide into GPON OLT optical module or EPON OLT light on disk or EPON network line card single-deck
Module, the design that a variety of different PON network can be supported to apply, improves networking flexibility, reduces the O&M cost of operator.
Realized for integrality from method, the control method of the embodiment of the present invention there is also the treatment process of another branch line,
When OLT optical module is inserted into EPON system equipment, microprocessor receives the instruction from system, makes 7 feet of electric connector
Trigger is signally attached to the Trigger input terminal of microprocessor, the control method further include:
Uplink optical signal is converted into uplink electrical signals by optical device, and uplink electrical signals are coupled to by capacitor C1 and capacitor C2
Receiver；Wherein capacitor C1, capacitor C2, resistance R1 and resistance R2 form large time constant RC circuit, capacitor C1, capacitor C2, electricity
It hinders R3 and resistance R4 and forms small time constant charge-discharge circuit；
When optical device is not received by optical signal, the electrical signal amplitude of optical device output is small, passes through capacitor C1 and capacitor
The electrical signal amplitude that C2 coupling comes is also smaller, and comparator 71 gives 72 input low level of derailing switch, is closed derailing switch 72, capacitor
C1, capacitor C2, resistance R3 and resistance R4 form small time constant charge-discharge circuit and enter working condition；
When optical device receives the preamble portion of burst upstream signal, the output amplitude of optical device becomes larger, and passes through electricity
Hold the electrical signal amplitude that C1 and capacitor C2 coupling comes to become larger, comparator 71 exports high level, disconnects derailing switch 72, by capacitor
C1, capacitor C2, resistance R1 and resistance R2 composition large time constant RC circuit work.
Since preamble portion is all made of high-frequency symmetrical signal, capacitor C1, capacitor C2, resistance R3 and resistance R4 composition
Small time constant charge-discharge circuit can quickly establish burst level when lead code section works.After derailing switch 72 disconnects, by electricity
Hold C1, capacitor C2, resistance R1 and resistance R2 composition large time constant RC circuit work.In the traditional circuit of EPON OLT, by
In the reset signal of no extraneous input, the coupling circuit of optical device and receiver are connected often only with one group of RC charge and discharge
Road after the present invention is by being added runback bit function, makes EPON OLT optical module also and can be useful in GPON OLT optical module to use
Large time constant and small time constant composition two groups of RC charge-discharge circuits, so that the circuit had both been adapted to GPON OLT optical mode
Block, and adapt to EPON OLT optical module.
The reset signal handles the burst electric signal of uplink, and burst mode receiver is enable quickly to establish burst threshold
Level not only meets the timing requirements of GPON uplink burst signal, more meets the timing requirements of EPON uplink burst signal, makes to locate
RC circuit between TIA (trans-impedance amplifier of optical device receiving end) and receiver had both been able to satisfy the ginseng of GPON OLT optical module
Number requires, and also meets the parameter request of EPON OLT optical module, eliminates the difference of both GPON and EPON in RC parameter
In embodiments of the present invention, the uplink signal port RX connection receiver of the electric connector, the reception
Device connects the self-resetting circuit, and the self-resetting circuit connects the optical device；The optical device is by received correspondence
The optical signal of uplink central wavelength 1310nm is converted to electric signal and passes to the self-resetting circuit；The self-resetting circuit root
It is produced from reset signal according to the electric signal received, to the receiver is given after the Electric signal processing received, is connect by described
It receives device and the uplink signal is passed into the electric connector, realize the transmitting and receive capabilities of the optical signal of OLT module.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (7)
1. a kind of adaptive OLT optical module, including electric connector, microprocessor, transmitter, receiver and optical device, wherein
Microprocessor is separately connected the transmitter and receiver, which is characterized in that optical module further includes analog switch and Self-resetting electricity
Road, specifically；
The control port of the electric connector connects the microprocessor, for the control signal of periphery to be transferred to micro- place
Manage device, wherein the control signal assigns instruction for microprocessor, controls the transmitter, receiver and/or analog switch
Running parameter；
1 signal port of control and 2 signal ports of control of the electric connector are connected to the gating interface of analog switch, and simulation is opened
The gating control interface of pass receives the signal from microprocessor, and 1 signal of control or 2 signals of control are passed to micro process by selection
Device；
The self-resetting circuit is produced from reset signal according to the burst electric signal received, at the burst electric signal received
The receiver is given after reason, and uplink signal is passed into the electric connector by the receiver；
When the optical module is that SFP is encapsulated, 1 signal port of the control and 2 signal ports of control are respectively its electric connector
The 7th pin and electric connector the 9th pin；
In GPON OLT, the 7th foot of 1 signal port of control and electric connector is corresponding to represent reset signal Reset, 2 letter of control
9th foot of number port and electric connector correspondence represents trigger signal Trigger；In EPON OLT, 1 signal port and electricity are controlled
7th foot of connector is corresponding to represent the triggering of Trigger signal, and the 9th foot correspondence for controlling 2 signal ports and electric connector represents ground
Signal.
2. adaptive OLT optical module according to claim 1, which is characterized in that the analog switch is specially chip
TS5A3157,1 signal port of control are connected to the NO pin of chip TS5A3157, and 2 signal ports of control are connected to chip
The NC pin of TS5A3157；The COM pin of chip TS5A3157 is connected to microprocessor, provides Trigger letter to microprocessor
Number；The IN pin of chip TS5A3157 is connected to microprocessor, receives microprocessor configuration-direct, for completing chip
The COM pin of TS5A3157 is connected to the NO pin of chip TS5A3157 or is connected to chip NC pin.
3. adaptive OLT optical module according to claim 2, which is characterized in that the microprocessor comes for receiving
From the instruction of system, when system works in GPON mode, microprocessor inputs low electricity to the end IN of switch chip TS5A3157
Ordinary mail number, chip NC pin are connected with COM pin, and 9 foot Trigger of electric connector is made to be signally attached to microprocessor
Trigger input terminal；When system works in EPON mode, IN end input high electricity of the microprocessor to switch chip TS5A3157
Ordinary mail number, chip NO pin are connected with COM pin, and 7 foot Trigger of electric connector is made to be signally attached to microprocessor
Trigger input terminal.
4. adaptive OLT optical module according to claim 1, which is characterized in that the self-resetting circuit includes capacitor
C1 and capacitor C2, resistance R1, resistance R2, resistance R3 and resistance R4, comparator (71) and derailing switch (72), specific:
The electric signal of optical device is coupled to receiver by capacitor C1 and capacitor C2, wherein resistance R1, resistance R2, resistance R3 and electricity
Resistance R4 is connected in parallel on capacitor C1 and/or capacitor C2 close to one section of receiver, so that capacitor C1, capacitor C2, resistance R1 and electricity accordingly
It hinders R2 and forms large time constant RC circuit, capacitor C1, capacitor C2, resistance R3 and resistance R4 form small time constant charge and discharge electricity
Road；
Wherein, resistance R3 and R4 connection switch device (72), the derailing switch (72) is for controlling the capacitor C1, capacitor C2, electricity
The small time constant charge-discharge circuit of resistance R3 and resistance R4 composition enters working condition or is detached from working condition；
Wherein, the input terminal of the comparator (71) is separately connected the capacitor C1 and C2 on the connecting line of receiver-side,
And the output end of the comparator (71) is connected with the switch control port of the derailing switch (72).
5. a kind of control method of adaptive OLT optical module, which is characterized in that when OLT optical module is inserted into GPON system equipment,
Microprocessor receives the instruction from system, and microprocessor controls analog switch, connects 9 foot Trigger signals of electric connector
It is connected to the Trigger input terminal of microprocessor, the control method includes:
Uplink optical signal is converted into uplink electrical signals by optical device, and uplink electrical signals are coupled to reception by capacitor C1 and capacitor C2
Device；Wherein capacitor C1, capacitor C2, resistance R1 and resistance R2 form large time constant RC circuit, capacitor C1, capacitor C2, resistance R3
Small time constant charge-discharge circuit is formed with resistance R4；
When optical device is not received by optical signal, the electrical signal amplitude of optical device output is small, passes through capacitor C1 and capacitor C2 coupling
It is also smaller to close the electrical signal amplitude to come, comparator (71) gives derailing switch (72) input low level, is closed derailing switch (72), electricity
Hold C1, capacitor C2, resistance R3 and the small time constant charge-discharge circuit of resistance R4 composition and enters working condition；
When optical device receives the preamble portion of burst upstream signal, the output amplitude of optical device becomes larger, and passes through capacitor C1
The electrical signal amplitude to come with capacitor C2 coupling becomes larger, and comparator (71) exports high level to derailing switch (72), makes derailing switch
(72) it disconnects, the work of large time constant RC circuit is formed by capacitor C1, capacitor C2, resistance R1 and resistance R2；
When the optical module is that SFP is encapsulated, 1 signal port of control and 2 signal ports of control of electric connector are respectively its electricity
7th pin of connector and the 9th pin of electric connector；
In GPON OLT, the 7th foot of 1 signal port of control and electric connector is corresponding to represent reset signal Reset, 2 letter of control
9th foot of number port and electric connector correspondence represents trigger signal Trigger；In EPON OLT, 1 signal port and electricity are controlled
7th foot of connector is corresponding to represent the triggering of Trigger signal, and the 9th foot correspondence for controlling 2 signal ports and electric connector represents ground
Signal.
6. the control method of adaptive OLT optical module according to claim 5, which is characterized in that the OLT optical module
When being inserted into EPON system equipment, microprocessor receives the instruction from system, connects 7 foot Trigger signals of electric connector
To the Trigger input terminal of microprocessor, the control method further include:
Uplink optical signal is converted into uplink electrical signals by optical device, and uplink electrical signals are coupled to reception by capacitor C1 and capacitor C2
Device；Wherein capacitor C1, capacitor C2, resistance R1 and resistance R2 form large time constant RC circuit, capacitor C1, capacitor C2, resistance R3
Small time constant charge-discharge circuit is formed with resistance R4；
When optical device is not received by optical signal, the electrical signal amplitude of optical device output is small, passes through capacitor C1 and capacitor C2 coupling
It is also smaller to close the electrical signal amplitude to come, comparator (71) gives derailing switch (72) input low level, is closed derailing switch (72), electricity
Hold C1, capacitor C2, resistance R3 and the small time constant charge-discharge circuit of resistance R4 composition and enters working condition；
When optical device receives the preamble portion of burst upstream signal, the output amplitude of optical device becomes larger, and passes through capacitor C1
The electrical signal amplitude to come with capacitor C2 coupling becomes larger, and comparator (71) exports high level, disconnects derailing switch (72), by capacitor
C1, capacitor C2, resistance R1 and resistance R2 composition large time constant RC circuit work.
7. the control method of adaptive OLT optical module according to claim 5 or 6, which is characterized in that the electrical connection
The uplink signal port RX connection receiver of device, the receiver connect self-resetting circuit, the self-resetting circuit connection
The optical device；The optical signal of received corresponding uplink central wavelength 1310nm is converted to electric signal simultaneously by the optical device
Pass to the self-resetting circuit；The self-resetting circuit is produced from reset signal based on the received electrical signal, to receiving
Electric signal processing after give the receiver, the uplink signal is passed into the electric connector by the receiver, it is real
The transmitting and receive capabilities of the optical signal of existing OLT module.
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| US12081925B2 (en) * | 2019-11-13 | 2024-09-03 | Zte Corporation | Optical line terminal line card and method compatible with pon function |
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| CN110769331B (en) * | 2018-07-27 | 2022-03-29 | 中兴通讯股份有限公司 | Line card, design method, communication control method, device and storage medium |
| CN112804598A (en) * | 2019-11-13 | 2021-05-14 | 中兴通讯股份有限公司 | Optical line terminal line card and method compatible with PON function |
| CN111935564B (en) * | 2020-07-03 | 2022-08-19 | 华为技术有限公司 | Line card, optical module and optical line terminal |
| CN114554321A (en) * | 2020-11-26 | 2022-05-27 | 华为技术有限公司 | Configuration method of time sequence information and related device |
| CN113382324B (en) * | 2021-08-12 | 2021-11-23 | 武汉西迪特通信技术有限公司 | Method capable of switching GPON and EPON modes and dual-mode OLT head-end equipment |
| CN117354648A (en) * | 2022-06-28 | 2024-01-05 | 华为技术有限公司 | Method for transmitting signal, method for receiving signal, device, system and medium |
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| US7873039B2 (en) * | 2006-06-29 | 2011-01-18 | Broadlight Ltd. | Enhanced optical line terminal controller |
| US7920798B2 (en) * | 2007-06-18 | 2011-04-05 | Micrel, Inc. | PON burst mode receiver with fast decision threshold setting |
| CN102497605B (en) * | 2011-12-20 | 2014-09-10 | 青岛海信宽带多媒体技术有限公司 | Receiver circuit for optical module and optical module |
| CN203896358U (en) * | 2014-05-07 | 2014-10-22 | 湖北工业大学 | Self-resetting burst-type light receiving circuit |
| CN104618052B (en) * | 2015-03-09 | 2017-08-04 | 深圳市共进电子股份有限公司 | A kind of interface circuit of GPON OLT optical modules |
| CN106209244B (en) * | 2016-06-29 | 2018-08-31 | 武汉电信器件有限公司 | Multi-functional OLT optical modules |
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| US12081925B2 (en) * | 2019-11-13 | 2024-09-03 | Zte Corporation | Optical line terminal line card and method compatible with pon function |
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