CN209517150U - Node optical transmitter and receiver and extensive telephone transmission system based on the optical transmitter and receiver - Google Patents
Node optical transmitter and receiver and extensive telephone transmission system based on the optical transmitter and receiver Download PDFInfo
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- CN209517150U CN209517150U CN201822239395.7U CN201822239395U CN209517150U CN 209517150 U CN209517150 U CN 209517150U CN 201822239395 U CN201822239395 U CN 201822239395U CN 209517150 U CN209517150 U CN 209517150U
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Abstract
The utility model discloses a kind of node optical transmitter and receiver and the multinode based on the optical transmitter and receiver transmits extensive telephone transmission system, wherein, node optical transmitter and receiver includes: optical receiver module, deserializer, field programmable gate array, phone interface module, clock chip, serializer and optical transmission module, and the field programmable gate array is configured with audio receiving unit, audio transmission unit and data buffer storage unit.The node optical transmitter and receiver of the utility model, the defect of a small amount of phone and node device can only be supported by solving existing conventional node type phone optical transmitter and receiver, maximum No. 480 phones can be carried, most 480 nodes is supported, greatly reduces the wiring cost of communication line and the bandwidth requirement of optical module.
Description
Technical field
The utility model relates to fields of communication technology, and in particular to a kind of node optical transmitter and receiver and the big rule based on the optical transmitter and receiver
Mould telephone transmission system.
Background technique
Optical transmitter and receiver is to be transmitted after converting the electrical signal to optical signal by optical fiber to realize the equipment transmitted at a distance.Mesh
In preceding telephone remote Distance Transmission scheme, use is point-to-point type phone optical transmitter and receiver mostly.By taking railway scene as an example, certain railway
Each node on be arranged phone optical transmitter and receiver, being placed in master control computer room is center optical transmitter and receiver, the optical transmitter and receiver and center light of each node
Terminal is connected by individual fibers.Center optical transmitter and receiver is connected with telephone exchange, and optical transmitter and receiver connects telephone set on each node.At this
In the case of kind, the optical transmitter and receiver on each node requires to be laid with a dedicated optical fiber to center optical transmitter and receiver, as distance increases
With increasing for node, being substantially increased for cost will lead to.
Node type optical transmitter and receiver, also referred to as cascade/link optical transmitter and receiver, it is real using time-division multiplex technology and electric difference multiplexing technology
Existing transmission of the data on a road Tiao Lian.It is limited to synchronised clock clock after multicast communication to deteriorate, clock jitter increases, and passes
System node type phone optical transmitter and receiver can only support a small amount of phone and node device.
Utility model content
The utility model intends to solve the technical problem by providing a kind of node optical transmitter and receiver and based on the extensive of the optical transmitter and receiver
Telephone transmission system can only support lacking for a small amount of phone and node device to solve existing conventional node type phone optical transmitter and receiver
It falls into.
To solve the above-mentioned problems, the utility model adopts the technical scheme that
The first aspect of the utility model provides a kind of node optical transmitter and receiver, which includes optical receiver module, solution
String device, field programmable gate array, phone interface module, clock chip, serializer and optical transmission module, the field-programmable
Gate array is configured with audio receiving unit, audio transmission unit and data buffer storage unit；Wherein,
The signal input part of the optical receiver module is used to receive the optical signal of front nodal point, and signal output end connects deserializer
Signal input part, the first signal output end of deserializer connects audio by the first signaling interface of field programmable gate array
The data signal input of receiving unit, the signal input of the signal output end connection data buffer storage unit of audio receiving unit
End, the data signal input of the signal output end connection audio transmission unit of data buffer storage unit, the letter of audio transmission unit
Number output end connects the data signal input of serializer by the second signal interface of field programmable gate array, serializer
Signal output end connects the signal input part of optical transmission module, and the signal output end of optical transmission module is for transmitting optical signals to down
One node；
The phone interface module is separately connected audio by the third signaling interface of field programmable gate array and receives list
The signal output end of member and the data signal input of audio transmission unit, the second signal output end of the deserializer pass through existing
The clock signal input terminal of the first interface clock signal connection audio receiving unit of field programmable gate array, the clock chip
The first signal output end the clock of audio transmission unit is connected by the second clock signaling interface of field programmable gate array
Signal input part, the clock signal input terminal of the second signal output end connection serializer of the clock chip.
Further, the recovered clock that the audio receiving unit uses deserializer to generate is as work clock, the sound
The local clock that frequency transmission unit uses clock chip to generate is as work clock.
Further, the data buffer storage unit includes DPRAM and Read-write Catrol module, and wherein DPRAM is that scene can compile
The storage unit of journey gate array insertion.
Further, the data buffer storage unit uses the recovered clock as write clock, and uses the local
Clock is as reading clock.
Further, the data buffer storage unit is provided with cache threshold, and in data cached arrival given threshold to
Audio transmission unit sends flag bit, and notification audio transmission unit therefrom reads data.
Further, the phone interface module access phone or telephone exchange, for audio receiving unit will to be come from
The digital signal analog audio signal and control signal that are converted into analog voice signal, and phone or telephone exchange are inputted
It is converted into digital signal and is sent to audio transmission unit.
The second aspect of the utility model provides a kind of extensive telephone transmission system, including central node light end
Machine and N number of node optical transmitter and receiver as described in the utility model first aspect；Wherein, N number of node optical transmitter and receiver successively serially connects
It connects, the optical receiver module of first node optical transmitter and receiver receives the optical signal that the central node optical transmitter and receiver is sent, n-th node optical
The optical transmission module of terminal sends optical signal to the central node optical transmitter and receiver；The central node optical transmitter and receiver connects the road N phone
Interaction machine, each node optical transmitter and receiver connect the road M telephone set by phone interface module.
Optionally, the value range of N and M are as follows: 1≤N≤480,1≤M≤31.
Preferably, the central node optical transmitter and receiver is machine frame card inserted optical terminal equipment.
The advantageous effects of the utility model:
The node optical transmitter and receiver of the utility model and extensive telephone transmission system based on the optical transmitter and receiver, pass through reasonable disposition
Field programmable gate array, and use recovered clock as the write-in of the work clock and data buffer storage unit of audio receiving unit
Clock uses local clock as the reading clock of the work clock of audio transmission unit and data buffer storage unit, and is based on
The read write attribute of DPRAM overcomes synchronised clock clock deterioration, the increased defect of clock jitter after multicast communication, thus
The defect of a small amount of phone and node device can only be supported by solving existing conventional node type phone optical transmitter and receiver, can carry maximum
No. 480 phones support most 480 nodes, greatly reduce the wiring cost of communication line and the bandwidth requirement of optical module.
Detailed description of the invention
Fig. 1 is the module composition and communication connection schematic diagram of the node optical transmitter and receiver embodiment of the utility model.
Fig. 2 is the composition schematic diagram of the extensive telephone transmission system embodiment of the utility model.
Fig. 3 is the working principle flow diagram of the node optical transmitter and receiver of the utility model.
Specific embodiment
For a further understanding of the utility model, the utility model preferred embodiment is retouched below with reference to embodiment
It states, but it is to be understood that these descriptions are only the feature and advantage for further illustrating the utility model, rather than practical to this
The limitation of novel claim.
Embodiment 1
As shown in Figure 1, a kind of node optical transmitter and receiver comprising optical receiver module, deserializer, field programmable gate array, electricity
Interface module, clock chip, serializer and optical transmission module are talked about, field programmable gate array is configured with audio receiving unit, sound
Frequency transmission unit and data buffer storage unit；Wherein,
The signal input part of optical receiver module is used to receive the optical signal of front nodal point, and signal output end connects the letter of deserializer
Number input terminal, the first signal output end of deserializer connect audio by the first signaling interface of field programmable gate array and receive
The data signal input of unit, the signal input part of the signal output end connection data buffer storage unit of audio receiving unit, number
According to the data signal input of the signal output end connection audio transmission unit of cache unit, the signal output of audio transmission unit
End connects the data signal input of serializer by the second signal interface of field programmable gate array, and the signal of serializer is defeated
Outlet connects the signal input part of optical transmission module, and the signal output end of optical transmission module is for transmitting optical signals to next section
Point；
Phone interface module is separately connected audio receiving unit by the third signaling interface of field programmable gate array
The second signal output end of the data signal input of signal output end and audio transmission unit, the deserializer can by scene
Program the clock signal input terminal of the first interface clock signal connection audio receiving unit of gate array, the of the clock chip
One signal output end connects the clock signal of audio transmission unit by the second clock signaling interface of field programmable gate array
Input terminal, the clock signal input terminal of the second signal output end connection serializer of the clock chip.
When the recovered clock that audio receiving unit uses deserializer to generate as a preferred implementation manner, is as work
Clock, while the local clock that audio transmission unit uses clock chip to generate is as work clock.
Embodiment as a further preference, data buffer storage unit include DPRAM and Read-write Catrol module, wherein
DPRAM is the storage unit of field programmable gate array insertion.
Embodiment as a further preference, data buffer storage unit use the recovered clock as write clock, and
Use the local clock as reading clock.
Embodiment as a further preference, data buffer storage unit are provided with cache threshold, and in data cached arrival
Flag bit is sent to audio transmission unit when given threshold, notification audio transmission unit therefrom reads data.
Phone interface module access phone or telephone exchange as a preferred implementation manner, for audio will to be come from
The digital signal of receiving unit is converted into analog voice signal, and analog audio signal that phone or telephone exchange are inputted and
Control signal is converted into digital signal and is sent to audio transmission unit.
With reference to the accompanying drawing 3 illustrate the present embodiment node optical transmitter and receiver working principle:
Step 301, optical receiver module receives the optical signal of front nodal point, is converted into electric signal, is sent to deserializer；
Step 302, deserializer converts electrical signals to the parallel signal comprising phone data and recovered clock, by telephone number
According to being sent to audio receiving unit, and using recovered clock as the work clock of audio receiving unit；
Step 303, audio receiving unit carries out frame decoding processing by the frame format of setting to phone data, takes from data flow
The data for belonging to this node out are sent to phone interface module, while total data is sent to data buffer storage unit and is cached；
Step 304, data buffer storage unit receives data from audio receiving unit and is cached in DPRAM, and DPRAM's
Flag bit is sent to audio transmission unit when data volume reaches the threshold value of setting；
Step 305, the local clock that audio transmission unit uses clock chip to generate is receiving number as work clock
When the flag bit sent according to cache unit, data are taken out from DPRAM, and carry out with the data from phone interface module compound
Afterwards by being sent to serializer after the format framing processing of setting；
Step 306, serializer is equally using local clock as work clock, by the data conversion from audio transmission unit
At serial signal, it is sent to optical transmission module；
Step 307, the electric signal from serializer is converted into optical signal by optical transmission module, is sent to downstream site.
Embodiment 2
As shown in Fig. 2, a kind of extensive telephone transmission system, which includes the central node optical transmitter and receiver an of first order
With the node optical transmitter and receiver in maximum 480 embodiments 1.Each node optical transmitter and receiver accesses maximum No. 31 telephone sets；Machine frame in figure
Card inserted optical terminal equipment is first order central node optical transmitter and receiver, and central node optical transmitter and receiver has accessed telephone exchange, and user passes through electricity
Words interchanger is called and is conversed to the phone of arbitrary node.The optical module reception of every level-one optical transmitter and receiver terminates to upper level light
The transmitting terminal of module, to save wiring cost, is calculated without each node connection optical fiber to central node in this way
The total bandwidth that No. 480 phones need is about 8*8K*480*2=62M, can meet bandwidth requirement using the optical module of 155M.
In traditional node optical transmitter and receiver, the clock of entire link requires to be same clock, and each node recovers
The clock of level-one optical transmitter and receiver is simultaneously transmitted as tranmitting data register toward junior, and each clock recovery can all cause the deterioration of clock,
Clock deterioration accumulation after several nodes is undergone to cause data transfer error.In the present embodiment, the tranmitting data register of each node is
Local clock sends data in the form of frames, and entire link unification is the frequency for sending frame.First order optical transmitter and receiver is by phone
The data of interface module encapsulate framing, with the rate sending data frame of 8K, are sent to junior's section by serializer and optical transmission module
Point.Subsequent node obtains the data frame and recovered clock of 8K rate after unstringing, and uses recovered clock as clock is received and connects
Data are received, and data are stored in data buffer storage unit, while the audio data for belonging to this node is sent to by audio receiving module
Phone interface module.Data buffer storage unit is by DPRAM (Double Port RAM) and Read-write Catrol module composition, when being written
Clock is recovered clock, reads the local clock that clock is present node.Audio receiving unit using local clock as work clock, from
Data are read in data buffer storage unit and phone interface module, Reseal framing by same format, often receive a data
Frame sends a data frame simultaneously, therefore transmission rate is mutually all 8K with first order node.Nodes at different levels handle number in the same manner
According to the data frame that first order node receives finally includes the audio data of remaining all node, by the corresponding feeding electricity of audio data
Call can be realized in words interface module.
The method and its core concept of the above embodiments are only used to help understand the utility model.It should refer to
It out, for those skilled in the art, without departing from the principle of this utility model, can also be to this
Some improvement and modification can also be carried out for utility model, these improvement and modification also fall into the protection scope of the utility model claims
It is interior.
Claims (9)
1. a kind of node optical transmitter and receiver, which is characterized in that the optical transmitter and receiver includes optical receiver module, deserializer, field-programmable gate array
Column, phone interface module, clock chip, serializer and optical transmission module, the field programmable gate array connect configured with audio
Receive unit, audio transmission unit and data buffer storage unit；Wherein,
The signal input part of the optical receiver module is used to receive the optical signal of front nodal point, and signal output end connects the letter of deserializer
Number input terminal, the first signal output end of deserializer connect audio by the first signaling interface of field programmable gate array and receive
The data signal input of unit, the signal input part of the signal output end connection data buffer storage unit of audio receiving unit, number
According to the data signal input of the signal output end connection audio transmission unit of cache unit, the signal output of audio transmission unit
End connects the data signal input of serializer by the second signal interface of field programmable gate array, and the signal of serializer is defeated
Outlet connects the signal input part of optical transmission module, and the signal output end of optical transmission module is for transmitting optical signals to next section
Point；
The phone interface module is separately connected audio receiving unit by the third signaling interface of field programmable gate array
The second signal output end of the data signal input of signal output end and audio transmission unit, the deserializer can by scene
Program the clock signal input terminal of the first interface clock signal connection audio receiving unit of gate array, the of the clock chip
One signal output end connects the clock signal of audio transmission unit by the second clock signaling interface of field programmable gate array
Input terminal, the clock signal input terminal of the second signal output end connection serializer of the clock chip.
2. node optical transmitter and receiver as described in claim 1, which is characterized in that the audio receiving unit is generated using deserializer
Recovered clock is as work clock, and the local clock that the audio transmission unit uses clock chip to generate is as work clock.
3. node optical transmitter and receiver as claimed in claim 2, which is characterized in that the data buffer storage unit includes DPRAM and read-write
Control module, wherein DPRAM is the storage unit of field programmable gate array insertion.
4. node optical transmitter and receiver as claimed in claim 3, which is characterized in that the data buffer storage unit uses the recovered clock
As write clock, and use the local clock as reading clock.
5. node optical transmitter and receiver as claimed in claim 4, which is characterized in that the data buffer storage unit is provided with cache threshold,
And flag bit is sent to audio transmission unit in data cached arrival given threshold, notification audio transmission unit therefrom reads number
According to.
6. node optical transmitter and receiver as described in any one in claim 1-5, which is characterized in that the phone interface module accesses phone
Or telephone exchange, for the digital signal from audio receiving unit to be converted into analog voice signal, and by phone or electricity
The analog audio signal and control signal of words interchanger input are converted into digital signal and are sent to audio transmission unit.
7. a kind of extensive telephone transmission system, which is characterized in that including central node optical transmitter and receiver and N number of such as claim
The described in any item node optical transmitter and receivers of 1-6；Wherein, N number of node optical transmitter and receiver is successively connected in series, the light of first node optical transmitter and receiver
Receiving module receives the optical signal that the central node optical transmitter and receiver is sent, and the optical transmission module of n-th node optical transmitter and receiver is to described
Central node optical transmitter and receiver sends optical signal；The central node optical transmitter and receiver connection road the N phone interaction machine, each node optical transmitter and receiver are logical
Cross the phone interface module connection road M telephone set.
8. extensive telephone transmission system as claimed in claim 7, which is characterized in that the value range of N and M are as follows: 1≤N≤
480,1≤M≤31。
9. extensive telephone transmission system as claimed in claim 7, which is characterized in that the central node optical transmitter and receiver is machine frame
Card inserted optical terminal equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822239395.7U CN209517150U (en) | 2018-12-28 | 2018-12-28 | Node optical transmitter and receiver and extensive telephone transmission system based on the optical transmitter and receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822239395.7U CN209517150U (en) | 2018-12-28 | 2018-12-28 | Node optical transmitter and receiver and extensive telephone transmission system based on the optical transmitter and receiver |
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| Publication Number | Publication Date |
|---|---|
| CN209517150U true CN209517150U (en) | 2019-10-18 |
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| CN201822239395.7U Active CN209517150U (en) | 2018-12-28 | 2018-12-28 | Node optical transmitter and receiver and extensive telephone transmission system based on the optical transmitter and receiver |
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