CN209731447U - The optical network unit for having wired TV functions - Google Patents
The optical network unit for having wired TV functions Download PDFInfo
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- CN209731447U CN209731447U CN201921002410.4U CN201921002410U CN209731447U CN 209731447 U CN209731447 U CN 209731447U CN 201921002410 U CN201921002410 U CN 201921002410U CN 209731447 U CN209731447 U CN 209731447U
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Abstract
The utility model discloses a kind of optical network units for having wired TV functions, are related to technical field of photo communication, which includes optical network unit ONU main control chip, passive optical network PON burst driving chip and cable television CATV driving chip.The optical network unit ONU main control chip is integrated to be equipped with micro-control unit MCU；The PON burst driving chip is equipped with the first group address pin for defining the first access address；The CATV driving chip is equipped with the second group address pin for defining the second access address；The ONU main control chip is connect with PON burst driving chip and the CATV driving chip, and the MCU accesses first access address or the corresponding chip of the second access address by sending address signal.The optical network unit for having wired TV functions of the utility model is not necessarily to multiple MCU, and equipment cost is low, and heat dissipation problem is small.
Description
Technical field
The utility model relates to technical field of optical fiber communication, and in particular to a kind of optical-fiber network list for having wired TV functions
Member.
Background technique
Passive optical network (Passive Optical Network) abbreviation PON is the broadband passive access skill of a new generation
Art.PON is usually by optical line terminal OLT (Optical Line Terminal), optical network unit ONU (Optical
Network Unit), optical splitter (Spliter) and optical fiber composition.With the large-scale use of PON technology, for PON's
The demand of optical network unit ONU is also continuously increased, while in order to meet the needs of user multi-service, the optical-fiber network list of some types
First ONU needs to have cable television CATV (Cable Television) function.
There are the following problems for the existing optical network unit for having wired TV functions:
There are multiple functional chips, such as optical network unit ONU main control chip, cable television inside optical network unit ONU
CATV driving chip and PON burst driving chip etc., since function needs, segment chip all respectively integrates a microcontroller list
First MCU (Micro Control Unit), as optical network unit ONU main control chip integrates micro-control unit a MCU, You Xian electricity
A micro-control unit MCU is integrated depending on integrated micro-control unit a MCU and PON the burst driving chip of CATV driving chip
Deng.Micro-control unit MCU in cable television CATV driving chip drives core by CATV for initializing CATV driving chip
The light index parameter of cable television is arranged in piece, and micro-control unit MCU is also monitored the temperature of CATV driving chip, receives
Op-tical power information is transmitted to optical network unit ONU main control chip.Similarly, the integrated micro-control unit MCU of PON burst driving chip
For initializing PON burst driving chip, the light index parameter of PON, the micro-control unit are set by PON burst driving chip
MCU is also monitored the temperature of PON burst driving chip, and received optical power information is transmitted to optical network unit ONU master control core
Piece.
Therefore, multiple chips respectively integrate a micro-control unit MCU in entire optical network unit ONU, lead to optical-fiber network
Unit ONU device product it is at high cost, equipment cooling problem is serious.
Utility model content
In view of the deficiencies in the prior art, the purpose of this utility model is to provide one kind to have wired TV functions
Optical network unit, be not necessarily to multiple MCU, equipment cost is low.
To achieve the above objectives, the technical scheme adopted by the utility model is that: a kind of light net having wired TV functions
Network unit, comprising:
Optical network unit ONU main control chip integrates and is equipped with micro-control unit MCU；
Passive optical network PON burst driving chip, is equipped with the first group address pin for defining the first access address；
Cable television CATV driving chip is equipped with the second group address pin for defining the second access address；
The ONU main control chip is connect with PON burst driving chip and the CATV driving chip, and the MCU is logical
It crosses transmission address signal and accesses first access address or the corresponding chip of the second access address.
Based on the above technical solution, the ONU main control chip by I2C bus or CAN bus respectively with institute
PON burst driving chip is stated to connect with the CATV driving chip.
Based on the above technical solution, in the bus between the ONU main control chip and the CATV driving chip
Equipped with photo-coupler.
Based on the above technical solution, the optical network unit further include:
Wave division multiplexing WDM optical device is connect with the CATV driving chip, and the WDM optical device by light for being connect
Mouth sends and receivees multipath light signal from optical link；The WDM optical device drives for sending optical signal all the way to the CATV
Chip.
Based on the above technical solution, the optical network unit further include:
PON optical device is connect with the WDM optical device, and the PON optical device is used to receive from the WDM optical device
Optical signal all the way, or transmitting all the way optical signal to the WDM optical device.
Based on the above technical solution, the PON optical device is connect with PON burst driving chip, the PON
Optical device for send all the way analog electrical signal to the PON happen suddenly driving chip, or from the PON burst driving chip connect
Receive analog electrical signal all the way.
Based on the above technical solution, PON burst driving chip also pass through SerDes data/address bus with it is described
The connection of ONU main control chip.
Based on the above technical solution, the first group address pin and the second group address pin are three, institute
The first access address for stating the first group address pin definitions is 0x011, the second access of the second group address pin definitions
Location is 0x100.
Based on the above technical solution, the optical network unit further include: WIFI chip, with the ONU master control
Chip connection.
Based on the above technical solution, the optical network unit further include: speech chip, with the ONU master control
Chip connection.
Compared with the prior art, the advantages of the utility model are: having wired TV functions in the utility model
Optical network unit, micro-control unit MCU are integrated in the optical network unit ONU main control chip, the optical network unit ONU master
Control chip is connect with PON burst driving chip and the cable television CATV driving chip, and the micro-control unit MCU is logical
It crosses transmission address signal to access respectively and monitor the PON burst driving chip and the cable television CATV driving chip, i.e.,
A micro-control unit MCU is only needed to can be achieved with multiple functional chips inside monitoring optical network unit ONU, equipment cost is low.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for having the optical network unit of wired TV functions in the utility model embodiment；
Fig. 2 is the circuit diagram for having the optical network unit of wired TV functions in the utility model embodiment；
Fig. 3 is another structural representation for having the optical network unit of wired TV functions in the utility model embodiment
Figure.
Specific embodiment
The embodiments of the present invention are described in further detail below in conjunction with attached drawing.
Referring to figure 1 and figure 2, the utility model embodiment provides a kind of optical-fiber network list for having wired TV functions
Member, including optical network unit ONU main control chip, passive optical network PON burst driving chip and cable television CATV drive core
Piece.
The ONU main control chip is integrated to be equipped with micro-control unit MCU.The PON burst driving chip is equipped with for defining
First group address pin of the first access address；The CATV driving chip is equipped with second group for defining the second access address
Address pins；The ONU main control chip is connect with PON burst driving chip and the CATV driving chip, and the MCU is logical
It crosses transmission address signal and accesses first access address or the corresponding chip of the second access address.
Specifically, shown in Figure 2, the first group address pin and the second group address pin are three, institute
Three address pins for stating PON burst driving chip are separately connected a low level and two high level by resistance, i.e., described
First access address of the first group address pin definitions is 0x011.Three address pins of the CATV driving chip pass through electricity
Resistance is separately connected a high level and two low levels, and the second access address of the second group address pin definitions is 0x100.
The MCU issues address signal, and the PON burst driving chip or the CATV driving chip can receive the MCU
The address signal of sending, the ground that then the PON burst driving chip or the CATV driving chip all issue the MCU
Location signal is compared with the access address of oneself.If it does, then the chip will issue a response signal, institute to the MCU
It states after MCU receives response signal and is communicated with chip foundation.When it is 011 that the MCU, which sends address signal, i.e., described in expression
MCU prepares to access the PON burst driving chip；When it is 100 that the MCU, which sends address signal, that is, indicate that the MCU prepares
Access the CATV driving chip.
Compared with prior art, the optical network unit for having wired TV functions in the utility model embodiment, micro-control
Unit MCU processed is integrated in the ONU main control chip, and the ONU main control chip and the PON happen suddenly driving chip and described
The connection of CATV driving chip, the MCU are accessed respectively by transmission address signal and are monitored the PON burst driving chip and institute
State CATV driving chip, only need a MCU can be achieved with monitoring optical network unit ONU inside multiple functional chips, equipment at
This reduction.Simultaneously as eliminating other multiple MCU, so that optical network unit ONU energy consumption is less, heat dissipation problem is smaller.
It is shown in Figure 2 as preferred embodiment, the ONU main control chip by I2C bus respectively with it is described
PON burst driving chip is connected with the CATV driving chip.I2C bus has two signal wires, and one is two-way data line
SDA, another is clock line SCL.I2C bus is minimum using signal wire in various buses, and has automatic addressing, more hosts
The bus of the functions such as clock synchronization and arbitration.I2C bus is very convenient flexibly, and volume is also small.
As preferred embodiment, the ONU main control chip can also be happened suddenly with the PON respectively by CAN bus
Driving chip is connected with the CATV driving chip.CAN bus uses non-destructive arbitration technique, when two nodes are simultaneously to net
When transmitting data on network, priority low node actively stops data and sends, and the high node of priority unaffected can continue
Data are transmitted, bus collision is effectively prevented.Can be point-to-point, one-to-many and broadcast centralized system transmits and receives data.Tool
Have the advantages that strong real-time, anti-electromagnetic interference capability are strong, at low cost, is widely used.
As preferred embodiment, the bus between the ONU main control chip and the CATV driving chip is equipped with
Photo-coupler OC (Optical Coupler).Photo-coupler generally consists of three parts: the transmitting of light, the reception of light and signal
Amplification.The electric signal of input drives Light-emitting diode LED (Light Emitting Diode), is allowed to issue certain wavelength
Light is received by optical detector and generates photoelectric current, using exporting after being further amplified, completes electricity-light-electricity conversion,
To play the role of input, output, isolation.Due to being mutually isolated between photo-coupler input and output, electric signal transmission has single
The features such as tropism, thus there is good electrical isolation capabilities and anti-interference ability.Again since the input terminal of photo-coupler belongs to electricity
The low-resistance element of flow pattern work, thus there is very strong common mode inhibition capacity.So it is used as isolation element in transmission information
Signal-to-noise ratio can be greatly improved.As the interface device of signal isolation in digital communication and real-time control, can greatly increase
The reliability of work.It is shown in Figure 2, be respectively equipped on two-way data line SDA and clock line SCL photo-coupler OC1 and
OC2, when data line SDA or clock line SCL is high level, the LED inside photo-coupler shines, and photo-coupler is on
State, photo-coupler OC1 or OC2 synchronism output high level give the CATV driving chip；When data line SDA or clock line
When SCL is low level, the LED inside photo-coupler does not shine, and photo-coupler is in an off state, photo-coupler OC1 or OC2
Synchronism output low level gives the CATV driving chip.Increase photo-coupler OC1, OC2 by setting, by the ONU master control core
The data line SDA or clock line SCL signal of piece do voltage isolation, can preferably protect the ONU main control chip not by institute
State the interference of CATV driving chip voltage fluctuation.
The optical network unit of the utility model can support GPON (Gigabit-Capable PON, G bit passive light net
Network), EPON (Ethernet Passive Optical Network, Ethernet passive optical network) and subsequent derivation form, after
For continuous embodiment by taking GPON as an example, i.e. it is GPON optical device that PON burst driving chip, which is GPON, PON optical device,.
As preferred embodiment, the optical network unit for having wired TV functions in the utility model embodiment is also
Including wave division multiplexing WDM (Wavelength Division Multiplexing) optical device, with the CATV driving chip
It is connected by optical fiber, the WDM optical device is used to send and receive multipath light signal from optical link by optical interface；The WDM
Optical device for send all the way optical signal to the CATV driving chip.Specifically, shown in Figure 3, the WDM optical device is logical
Optical interface is crossed to receive two ways of optical signals (optical signal of respectively 1490nm and 1550nm) from optical link and send optical signal all the way
Optical signal all the way therein (optical signal of 1550nm) is sent to described by (optical signal of 1310nm), the WDM optical device
CATV driving chip, the optical signal is converted electric signal by the CATV driving chip, then is sent to electricity by RF coaxial fitting
Depending on.
As preferred embodiment, the optical network unit for having wired TV functions in the utility model embodiment is also
It including PON optical device, is connect with the WDM optical device by optical fiber, the PON optical device is used for from the WDM optical device
Receive optical signal all the way, or transmitting all the way optical signal to the WDM optical device.The PON optical device and PON burst are driven
Dynamic chip connection, the PON optical device happen suddenly driving chip for sending analog electrical signal all the way to the PON, or from institute
It states PON burst driving chip and receives analog electrical signal all the way.Specifically, shown in Figure 3, the PON optical device is from the WDM
Optical device receives optical signal (optical signal of 1490nm) all the way, or optical signal (optical signal of 1310nm) is extremely described all the way for transmitting
WDM optical device.The electric signal that optical signal all the way (optical signal of 1310nm) is converted to simulation is sent to institute by the PON optical device
PON burst driving chip is stated, or receives analog electrical signal all the way from PON burst driving chip and is converted to optical signal all the way
(optical signal of 1310nm).
As preferred embodiment, the PON burst driving chip also passes through SerDes (serializer (Serializer)
Deserializer (Deserializer)) data/address bus connect with the ONU main control chip, the PON burst driving chip with it is described
ONU main control chip passes through SerDes data bus communication.Design based on SerDes data/address bus increases bandwidth, reduces letter
Number amount reduces wiring conflict, reduces switching noise, reduces power consumption and packaging cost.SerDes data/address bus is a kind of mainstream
Time division multiplexing, point-to-point serial communication technology.High speed serialization is converted into transmitting terminal multi-path low speed parallel signal
Signal, by transmission medium (optical cable or copper wire), finally in receiving end, high-speed serial signals are re-converted into speed parallel signals.
This point-to-point serial communication technology makes full use of the channel capacity of transmission medium, reduces required transmission channel and device and draws
Foot number, the transmission speed of promotion signal can substantially reduce communications cost, also reduce the equipment cost of optical network unit ONU.
As preferred embodiment, the optical network unit for having wired TV functions in the utility model embodiment is also
Including WIFI chip, it is connect with the ONU main control chip.Specifically, shown in Figure 3, by the WIFI chip and
WIFI antenna, provides wireless networking capabilities.
As preferred embodiment, the optical network unit for having wired TV functions in the utility model embodiment is also
Including speech chip, it is connect with the ONU main control chip.Specifically, shown in Figure 3, by the speech chip and
RJ11 interface provides two-way telephony feature.
It is shown in Figure 3 as preferred embodiment, have wired TV functions in the utility model embodiment
Optical network unit also passes through RJ45 interface and provides four road wire networking functions.
The specific working mode of the optical network unit for having wired TV functions of the utility model is as follows:
The optical network unit for having wired TV functions of the utility model is equipped with wave division multiplexing WDM optical device, the WDM
Optical device receives two ways of optical signals (optical signal of respectively 1490nm and 1550nm) and transmission one from optical link by optical interface
Road optical signal (optical signal of 1310nm), the WDM optical device send optical signal all the way therein (optical signal of 1550nm)
To the CATV driving chip, the optical signal is converted electric signal by the CATV driving chip, then is sent out by RF coaxial fitting
Give TV.
Optical network unit further includes PON optical device, and the PON optical device receives optical signal all the way from the WDM optical device
(optical signal of 1490nm), or emit optical signal (optical signal of 1310nm) the extremely WDM optical device all the way.The PON light
The electric signal that optical signal all the way (optical signal of 1310nm) is converted to simulation is sent to the PON burst driving chip by device,
Or analog electrical signal all the way is received from PON burst driving chip and is converted to optical signal (optical signal of 1310nm) all the way.
The PON burst driving chip also passes through SerDes data/address bus and connect with the ONU main control chip, the PON burst driving
Chip and the ONU main control chip pass through SerDes data bus communication.In addition, optical network unit is additionally provided with WIFI chip and language
Sound chip provides wireless networking capabilities by WIFI chip and WIFI antenna, by speech chip and RJ11 interface, provides two
Road telephony feature also provides four road wire networking functions by RJ45 interface.
Wherein, the ONU main control chip is driven with PON burst driving chip and the CATV respectively by I2C bus
Dynamic chip connection, the micro-control unit MCU being integrated in the ONU main control chip are accessed respectively and are monitored the PON burst and drive
Dynamic chip and the CATV driving chip.
Compared with prior art, the optical network unit for having wired TV functions in the utility model embodiment, micro-control
Unit MCU processed is integrated in the ONU main control chip, and the ONU main control chip and the PON happen suddenly driving chip and described
The connection of CATV driving chip, the MCU are accessed respectively by transmission address signal and are monitored the PON burst driving chip and institute
State CATV driving chip, only need a MCU can be achieved with monitoring optical network unit ONU inside multiple functional chips, equipment at
This reduction.Simultaneously as eliminating other multiple MCU, so that optical network unit ONU energy consumption is less, heat dissipation problem is smaller.
The utility model is not only limited to above-mentioned preferred forms, anyone can obtain under the enlightenment of the utility model
Other various forms of products out, however, make any variation in its shape or structure, it is all to have and the utility model phase
Same or similar technical solution, within its protection scope.
Claims (10)
1. a kind of optical network unit for having wired TV functions characterized by comprising
Optical network unit ONU main control chip integrates and is equipped with micro-control unit MCU；
Passive optical network PON burst driving chip, is equipped with the first group address pin for defining the first access address；
Cable television CATV driving chip is equipped with the second group address pin for defining the second access address；
The ONU main control chip is connect with PON burst driving chip and the CATV driving chip, and the MCU passes through hair
Address signal is sent to access first access address or the corresponding chip of the second access address.
2. having the optical network unit of wired TV functions as described in claim 1, it is characterised in that:
The ONU main control chip is driven by I2C bus or CAN bus and PON burst driving chip and the CATV
Chip connection.
3. having the optical network unit of wired TV functions as claimed in claim 2, it is characterised in that:
Bus between the ONU main control chip and the CATV driving chip is equipped with photo-coupler.
4. having the optical network unit of wired TV functions as described in claim 1, which is characterized in that further include:
Wave division multiplexing WDM optical device is connect with the CATV driving chip, the WDM optical device be used for by optical interface from
Optical link sends and receivees multipath light signal；The WDM optical device for send all the way optical signal to the CATV driving chip.
5. having the optical network unit of wired TV functions as claimed in claim 4, which is characterized in that further include:
PON optical device is connect with the WDM optical device, and the PON optical device is used to receive all the way from the WDM optical device
Optical signal, or transmitting all the way optical signal to the WDM optical device.
6. having the optical network unit of wired TV functions as claimed in claim 5, it is characterised in that:
The PON optical device is connect with PON burst driving chip, and the PON optical device is for sending analog telecommunications all the way
It number happens suddenly driving chip to the PON, or receives analog electrical signal all the way from PON burst driving chip.
7. having the optical network unit of wired TV functions as described in claim 1, it is characterised in that: the PON burst is driven
Dynamic chip also passes through SerDes data/address bus and connect with the ONU main control chip.
8. having the optical network unit of wired TV functions as described in claim 1, it is characterised in that:
The first group address pin and the second group address pin are three, and the first of the first group address pin definitions is visited
Ask that address is 0x011, the second access address of the second group address pin definitions is 0x100.
9. having the optical network unit of wired TV functions as described in claim 1, which is characterized in that further include: WIFI core
Piece is connect with the ONU main control chip.
10. having the optical network unit of wired TV functions as described in claim 1, which is characterized in that further include: voice core
Piece is connect with the ONU main control chip.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921002410.4U CN209731447U (en) | 2019-06-28 | 2019-06-28 | The optical network unit for having wired TV functions |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921002410.4U CN209731447U (en) | 2019-06-28 | 2019-06-28 | The optical network unit for having wired TV functions |
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| CN209731447U true CN209731447U (en) | 2019-12-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112165419A (en) * | 2020-09-29 | 2021-01-01 | 深圳市新龙鹏科技有限公司 | I2C analog communication method, device, equipment and storage medium of home gateway |
-
2019
- 2019-06-28 CN CN201921002410.4U patent/CN209731447U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112165419A (en) * | 2020-09-29 | 2021-01-01 | 深圳市新龙鹏科技有限公司 | I2C analog communication method, device, equipment and storage medium of home gateway |
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