CN105490382B - A kind of uplink signal processing method - Google Patents
A kind of uplink signal processing method Download PDFInfo
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- CN105490382B CN105490382B CN201510826567.9A CN201510826567A CN105490382B CN 105490382 B CN105490382 B CN 105490382B CN 201510826567 A CN201510826567 A CN 201510826567A CN 105490382 B CN105490382 B CN 105490382B
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Abstract
The present invention provides a kind of uplink signal processing method, including:Terminal device receives the digital signal that the first user terminal is sent, and the digital signal is converted to carrier signal, sends the carrier signal;Trunking receives the carrier signal, and carries out gain to the carrier signal, sends the carrier signal after gain;Headend receives the carrier signal after the gain, and the digital signal is converted to digital signal, sends the digital signal;Device of optical network unit receives the digital signal, and the digital signal is converted to optical signal, and the optical signal is sent to optical line terminal.
Description
Technical field
The present invention relates to data communication field, and in particular to a kind of uplink signal processing method.
Background technology
Electrical power distribution automatization system is the important technical for lifting power distribution network production management level and improving power supply reliability,
And one of main contents of intelligent grid construction.State Grid Corporation of China is just in all-round construction using extra-high voltage grid as backbone network
Frame, electric network coordination at different levels development sturdy power grid based on, by information-based, automation, it is interactive characterized by autonomous innovation, state
The leading strong intelligent grid in border.Intelligent grid is on the basis of information pattern that is open and interconnecting, passes through loading system numeral
Equipment and upgrading electricity grid network management system, realize power generation, transmission of electricity, power supply, electricity consumption, client's sale of electricity, power grid graded dispatching, synthesis
Full-range intelligent, information-based, the classificationization interactive management of the power industries such as service, is to have gathered Industrial Revolution, technological revolution
Changed with the comprehensive efficiency of management revolution.
Fiber optic communication is Primary communication mode in electrical power distribution automatization system transformation.But see with practical conditions, for not reserving
Communication pipe region, cost of investment is larger, constructional difficulties;For reserving communication pipe region, due to surface subsidence, other pipes
The reasons such as road construction, the pipeline of 20%-30% is obstructed, causes optical fiber not pass through, it can be seen that, single use fiber optic communication
The cost that system carries out networking is higher.
The content of the invention
For this reason, the technical problems to be solved by the invention are to reduce communications cost, the practicality of communication system is improved.
The present invention provides a kind of uplink signal processing method, including:
Terminal device receives the digital signal that the first user terminal is sent, and the digital signal is converted to carrier wave letter
Number, send the carrier signal;
Trunking receives the carrier signal, and carries out gain to the carrier signal, sends the carrier wave letter after gain
Number;
Headend receives the carrier signal after the gain, and the digital signal is converted to digital signal, sends
The digital signal;
Device of optical network unit receives the digital signal, and the digital signal is converted to optical signal, to optical link
Terminal sends the optical signal.
Preferably, the method further includes:
Trunking receives the digital signal that second user terminal is sent, and the digital signal is converted to carrier wave letter
Number, send the carrier signal to the headend.
Preferably, the trunking receives the carrier signal and includes:
The carrier signal is coupled in the second cable by the 4th coupler;
Carrier signal in second cable is coupled in the trunking by the 3rd coupler.
Preferably, the carrier signal that the headend is received after the gain includes:
Carrier signal after the gain is coupled in the first cable by the second coupler;
Carrier signal after gain in first cable is coupled in the headend by the first coupler.
Preferably, first cable is the power transmission cable between the first switching station and the second switching station, first cable
First end be the ring main unit in first switching station leading-out terminal, the second end of first cable is second opening and closing
In ring main unit end of incoming cables;
Second cable is the power transmission cable between second switching station and the 3rd switching station, the of second cable
One end is the leading-out terminal of the ring main unit in second switching station, and the second end of second cable is in the 3rd switching station
Ring main unit end of incoming cables.
Preferably, the headend, trunking, terminal device handle the uplink letter using OFDM modulation systems
Number, and the working frequency of itself is determined according to the transmission quality of the uplink signal.
The downlink signal processing method provided according to the present invention, is docked by device of optical network unit with optical line terminal,
Receive the downlink data sent with form of light waves and send digital signal, digital signal is then received by headend, and will
It is converted to the carrier signal that can be transmitted in the cable, while carries out gain to the carrier signal by trunking, with more
The loss in transmitting procedure is mended, above-mentioned carrier signal is received eventually through terminal device, and is converted into digital signal transmission
To user terminal, the mixed networking of fiber optic communication and carrier communication is realized, it is possible thereby to reduce applying for optical fiber on communication line
And if then reduce communication line construction cost, to reduce communications cost.
Brief description of the drawings
In order to make the content of the present invention more clearly understood, the specific embodiment below according to the present invention and combination
Attached drawing, the present invention is described in further detail, wherein
Fig. 1 is the structure diagram for the uplink signal processing system that the embodiment of the present invention 1 provides;
Fig. 2 is the concrete structure diagram for the uplink signal processing system that the embodiment of the present invention 1 provides;
Fig. 3 is the flow chart for the uplink signal processing method that the embodiment of the present invention 2 provides.
Embodiment
Embodiment 1
The present embodiment provides a kind of uplink signal processing system, as shown in Figure 1, the system includes:
Terminal device 14, the digital signal sent for receiving the first user terminal 15, and the digital signal is changed
For carrier signal, the carrier signal is sent;Terminal device 14 can be provided with the equipment of carrier signal process chip, such as electricity
Power modem, its effect are the digital signals for meeting 802.3 standards of IEEE for sending the first user terminal 15 at
Reason is converted into being adapted to the analog electrical signal in power line transmission, for representing uplink communication data.Specifically, i.e., by slave device
Port receives the digital signal for meeting IEEE802.3 standards to come by encryption, coding, modulation treatment, is converted to and is adapted to
The carrier wave analog signal of power cable transmission.
Trunking 13, is connected by cable with the terminal device 14, for receiving the carrier signal, and to described
Carrier signal carries out gain, sends the carrier signal after gain;Since carrier signal is substantially a kind of electromagnetic signal, so with
The increase of transmission range itself can decay.Trunking 13 can be provided with the equipment of gain process chip, such as
A kind of gain equipment, it can carry out signal gain to carrier signal, and the signal for making up signal long distance transmission in the cable declines
Subtract, make up loss.
Headend 12, is connected by cable with the trunking 13, for receiving the carrier signal after the gain,
And the digital signal is converted into digital signal, send the digital signal;Headend 12 can be provided with carrier signal
The equipment of process chip, such as electric power modem, its effect is to be converted into being adapted to by processing by above-mentioned carrier signal
The digital signal transmitted in cable, for representing uplink communication data.Specifically, i.e., the carrier wave to come is received to the device port
Signal is demodulated, decryption processing, is converted to the digital signal for meeting IEEE802.3 standards.
Device of optical network unit 11, is connected by cable with the headend 12, for receiving the digital signal, and
The digital signal is converted into optical signal, the optical signal is sent to optical line terminal.Device of optical network unit 11 is ONU
(Optical Network Unit), which is the ustomer premises access equipment in optical-fiber network, is placed on user side, with optical line terminal
It is used cooperatively, realizes two layers of Ethernet, three layer functions, provide voice, data and multimedia service to the user.The optical link is whole
End(OLT, optical line terminal)It is the core component of optical access network, is typically placed in local side, there is provided user oriented
Passive optical-fiber network optical fiber interface.After conversion process, device of optical network unit 11 can be sent to OLT using light as biography
The uplink communication data of defeated medium.
The uplink signal processing system provided according to the present invention, the numeral that user terminal transmission is received by terminal device are believed
The carrier signal that can be transmitted in the cable number is converted into, and gain is carried out to the carrier signal by trunking, with
The loss in transmitting procedure is made up, then by the carrier signal after headend gain acceptance in, and is converted into digital letter
Number, the digital signal is received eventually through device of optical network unit, and be converted into the light letter for being adapted to transmit in a fiber
Number send to optical line terminal, the mixed networking of fiber optic communication and carrier communication is realized, it is possible thereby to be reduced on communication line
The laying of optical fiber, and then communication line construction working is reduced, reduce communications cost.
The system is obstructed especially suitable for not reserved communication pipe or communication pipe in power distribution automation transformation process
Region(Since the pipelines caused by reason such as surface subsidence, other pipeline constructions are obstructed etc.)Although such region can not lay light
Fibre, but cable run is equipped with mostly.In this case end can be reached in optical fiber and sets up above-mentioned device of optical network unit and head
End equipment, sets up bandwidth carrier terminal/trunking, you can complete the obstructed point of optical fiber to main website in obstructed position of local optical fiber
The communication network of platform is established, and is P2P(Point-to-point mode)Or P2MP(Point-to-multipoint mode).This method need not
Any construction is carried out on communication line, only need to can complete distribution after installation and debugging the said equipment on existing communication line
The construction of communication network.
Due to 13 position of trunking may also it is in need send upstream data user terminal, so the present embodiment
Trunking 13 be additionally operable to receive the digital signal that second user terminal 16 is sent, and the digital signal is converted into carrier wave
Signal, the carrier signal is sent to the headend 12.I.e. trunking 13 can also be provided with carrier signal processing core
The equipment of piece, such as electric power modem, what it can send second user terminal 16 meets 802.3 standards of IEEE
Digital signal is converted into being adapted to the analog electrical signal in power line transmission by processing, for representing uplink communication data.Tool
Body, i.e., slave device port is received to the digital signal for meeting IEEE802.3 standards to come by encrypting, encoding, at modulation
Reason, is converted to the carrier wave analog signal being adapted in power cable transmission.
Fig. 2 shows the specific schematic diagram of the system, as shown in Fig. 2, the downlink signal processing system of the present embodiment may be used also
With including:First coupler 21 and the second coupler 22, the headend 12 pass through the electricity of the first coupler 21 and first
The first end connection of cable 25, the trunking 13 are connected by the second end of second coupler 22 and first cable 25
Connect, wherein second coupler 22 is used to the carrier signal after the gain being coupled in first cable 25, it is described
First coupler 21 is used to the carrier signal after the gain in first cable 25 being coupled in the headend 12.
The system can also include:3rd coupler 23 and the 4th coupler 24, the trunking 13 pass through described
Three couplers 23 are connected with the first end of the second cable 26, and the terminal device 14 passes through the 4th coupler 24 and described the
The second end connection of two cables 26, wherein the 4th coupler 24 is used to the carrier signal being coupled to second cable
In 26, the 3rd coupler 23 is used to the carrier signal in second cable 26 being coupled in the trunking 13.
Specifically, above-mentioned coupler can be inductive coupler or capacity coupler, and coupler is usually separately mounted to one
The both ends of root cable, its act on be signal coupling and high_voltage isolation, i.e., the carrier signal sent equipment by coupling
It is coupled on cable and is transmitted, coupler is installed on original cable run, it is not necessary to change circuit, will not
Destroy circuit.
Preferably, first cable 25 is the power transmission cable between the first switching station 27 and the second switching station 28, described
The first end of one cable 25 is the leading-out terminal of the ring main unit in first switching station 27, and the second end of first cable 25 is
The end of incoming cables of ring main unit in second switching station 28;
Second cable 26 is the power transmission cable between 28 and the 3rd switching station 29 of the second switching station, second electricity
The first end of cable 26 is the leading-out terminal of the ring main unit in second switching station 28, and the second end of second cable 26 is described
The end of incoming cables of ring main unit in 3rd switching station 29.
Switching station is for receiving electric power and distributing the power supply and distribution facility of electric power, and switchyard is known as in high-voltage fence.As before
Described in text, carrier signal is substantially a kind of electromagnetic signal, if carrier signal in transmitting procedure directly through switching station, must
Certain interference can be so subject to and influence the quality of signal.In order to avoid influence of the switching station to signal quality, in the system
Coupler can be configured according to above-mentioned preferred solution, make carrier signal across the switching station on transmission line, to improve
The quality of carrier signal.
The modulation system of carrier signal has a variety of, and the headend, trunking, terminal device in the present embodiment are adopted
The uplink signal is handled with OFDM modulation systems, and the work frequency of itself is determined according to the transmission quality of the uplink signal
Rate, the operating frequency range can be 2-34MHz.
Mainly had the advantage that using OFDM technologies:1)Effectively overcome intersymbol interference, strong antijamming capability;2)Frequency band profit
With rate height;3)The equilibrium of system is simple etc..Terminal device 14 can be selected using complete according to the change of real-Time Signal Transfer quality
Portion or portion subcarriers, and the modulation system of subcarrier can be adjusted flexibly.
Embodiment 2
The present embodiment provides a kind of uplink signal processing method, as shown in figure 3, this method includes:
S1, terminal device receives the digital signal that the first user terminal is sent, and the digital signal is converted to carrier wave
Signal, sends the carrier signal;Terminal device can be provided with the equipment of carrier signal process chip, such as power modulation solution
Device is adjusted, it acts on the digital signal for meeting 802.3 standards of IEEE for being to send the first user terminal and is converted into fitting by processing
The analog electrical signal in power line transmission is closed, for representing uplink communication data.Specifically, i.e., slave device port was received
The digital signal for meeting IEEE802.3 standards is converted to by encryption, coding, modulation treatment and is adapted to pass in power cable
Defeated carrier wave analog signal.
S2, trunking receives the carrier signal, and carries out gain to the carrier signal, sends the carrier wave after gain
Signal, trunking can be connected by cable with the terminal device.Since carrier signal is substantially a kind of electromagnetic signal,
So itself it can decay with the increase of transmission range.Trunking can be provided with the equipment of gain process chip,
Such as electric power modem, it can carry out signal gain to carrier signal, make up signal long distance transmission in the cable
Signal attenuation, make up loss.
S3, headend receives the carrier signal after the gain, and the digital signal is converted to digital signal, sends out
Send the digital signal;Headend can be connected by cable with the trunking, and headend can be provided with carrier wave
The equipment of signal processing chip, such as electric power modem, its effect is to be converted into fitting by processing by above-mentioned carrier signal
The digital signal transmitted in cable is closed, for representing uplink communication data.Specifically, i.e., what is come is received to the device port
Carrier signal is demodulated, decryption processing, is converted to the digital signal for meeting IEEE802.3 standards.
S4, device of optical network unit receives the digital signal, and the digital signal is converted to optical signal, to light
Road terminal sends the optical signal, and optical network unit can be connected by cable with the headend, device of optical network unit
That is ONU (Optical Network Unit), which is the ustomer premises access equipment in optical-fiber network, is placed on user side, with light
Road terminal is used cooperatively, and is realized two layers of Ethernet, three layer functions, is provided voice, data and multimedia service to the user.The light
Line terminal(OLT, optical line terminal)It is the core component of optical access network, is typically placed in local side, there is provided face
To the optical fiber interface of the passive optical-fiber network of user.After conversion process, device of optical network unit can be sent with light to OLT
For the uplink communication data of transmission medium.
The uplink signal processing method provided according to the present invention, the numeral that user terminal transmission is received by terminal device are believed
The carrier signal that can be transmitted in the cable number is converted into, and gain is carried out to the carrier signal by trunking, with
The loss in transmitting procedure is made up, then by the carrier signal after headend gain acceptance in, and is converted into digital letter
Number, receive the digital signal eventually through device of optical network unit, and be converted into the light letter for being adapted to transmit in a fiber
Number send to optical line terminal, the mixed networking of fiber optic communication and carrier communication is realized, it is possible thereby to be reduced on communication line
The laying of optical fiber, and then communication line construction working is reduced, reduce communications cost.
This method is obstructed especially suitable for not reserved communication pipe or communication pipe in power distribution automation transformation process
Region(Since the pipelines caused by reason such as surface subsidence, other pipeline constructions are obstructed etc.)Although such region can not lay light
Fibre, but cable run is equipped with mostly.In this case end can be reached in optical fiber and sets up above-mentioned device of optical network unit and head
End equipment, sets up bandwidth carrier terminal/trunking, you can complete the obstructed point of optical fiber to main website in obstructed position of local optical fiber
The communication network of platform is established, and is P2P(Point-to-point mode)Or P2MP(Point-to-multipoint mode).This method need not
Any construction is carried out on communication line, only need to can complete distribution after installation and debugging the said equipment on existing communication line
The construction of communication network.
Due to trunking position may also it is in need send upstream data user terminal, so the present embodiment institute
The method of stating can also include:
S5, trunking receives the digital signal that second user terminal is sent, and the digital signal is converted to carrier wave
Signal, the carrier signal is sent to the headend.Trunking can also be provided with setting for carrier signal process chip
It is standby, for example, electric power modem, its digital signal for meeting 802.3 standards of IEEE that second user terminal can be sent
It is converted into being adapted to the analog electrical signal in power line transmission by processing, for representing uplink communication data.Specifically, will
Slave device port receives the digital signal for meeting IEEE802.3 standards to come by encryption, coding, modulation treatment, is converted to
It is adapted to the carrier wave analog signal in power cable transmission.
This method can utilize the coupling of coupler to transmit above-mentioned carrier signal, and coupler is usually separately mounted to one
The both ends of root cable, its act on be signal coupling and high_voltage isolation, i.e., the carrier signal sent equipment by coupling
It is coupled on cable and is transmitted, coupler is installed on original cable run, it is not necessary to change circuit, will not
Circuit is destroyed, above-mentioned coupler can be inductive coupler or capacity coupler.
Preferably, the S2 can include:
The carrier signal is coupled in the second cable by S21, the 4th coupler;
Carrier signal in second cable is coupled in the trunking by S22, the 3rd coupler.
The S3 can include:
Carrier signal after the gain is coupled in the first cable by S31, the second coupler;
Carrier signal after gain in first cable is coupled in the headend by S32, the first coupler.
It is highly preferred that first cable is the power transmission cable between the first switching station and the second switching station, first electricity
The first end of cable is the leading-out terminal of the ring main unit in first switching station, and the second end of first cable is described second to open
Close in ring main unit end of incoming cables;
Second cable is the power transmission cable between second switching station and the 3rd switching station, the of second cable
One end is the leading-out terminal of the ring main unit in second switching station, and the second end of second cable is in the 3rd switching station
Ring main unit end of incoming cables.
Switching station is for receiving electric power and distributing the power supply and distribution facility of electric power, and switchyard is known as in high-voltage fence.As before
Described in text, carrier signal is substantially a kind of electromagnetic signal, if carrier signal in transmitting procedure directly through switching station, must
Certain interference can be so subject to and influence the quality of signal.It is above-mentioned preferred in order to avoid influence of the switching station to signal quality
Scheme can utilize coupler make carrier signal across the switching station on transmission line, to improve the quality of carrier signal.
The modulation system of carrier signal has a variety of, and the headend, trunking, terminal device in the present embodiment are adopted
The uplink signal is handled with OFDM modulation systems, and the work frequency of itself is determined according to the transmission quality of the uplink signal
Rate, the operating frequency range can be 2-34MHz.
Mainly had the advantage that using OFDM technologies:1)Effectively overcome intersymbol interference, strong antijamming capability;2)Frequency band profit
With rate height;3)The equilibrium of system is simple etc..Terminal device can be selected using all according to the change of real-Time Signal Transfer quality
Or portion subcarriers, and the modulation system of subcarrier can be adjusted flexibly.
Obviously, the above embodiments are merely examples for clarifying the description, and the restriction not to embodiment.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of change or
Change.There is no necessity and possibility to exhaust all the enbodiments.And the obvious change thus extended out or
Among changing still in the protection domain of the invention.
Claims (3)
- A kind of 1. uplink signal processing method, it is characterised in that including:Terminal device receives the digital signal that the first user terminal is sent, and the digital signal of reception is converted to carrier signal, Send the carrier signal;The carrier signal that the terminal device is sent is coupled in the second cable by the 4th coupler;Carrier signal in second cable is coupled in trunking by the 3rd coupler;The trunking receives the carrier signal in second cable, and carries out gain to the carrier signal of reception, sends Carrier signal after gain;Carrier signal after the trunking gain is coupled in the first cable by the second coupler;Carrier signal after gain in first cable is coupled in headend by the first coupler;First cable is the power transmission cable between the first switching station and the second switching station, and the first end of first cable is institute The leading-out terminal of the ring main unit in the first switching station is stated, the second end of first cable is the ring main unit in second switching station End of incoming cables;Second cable is the power transmission cable between second switching station and the 3rd switching station, the first end of second cable It is the leading-out terminal of the ring main unit in second switching station, the second end of second cable is the ring in the 3rd switching station The end of incoming cables of net cabinet;The headend receives the carrier signal after the gain in first cable, and the carrier wave after the gain of reception is believed Number digital signal is converted to, sends the digital signal of conversion;Device of optical network unit receives the digital signal that the headend is sent, and the numeral that the headend is sent is believed Number optical signal is converted to, the optical signal is sent to optical line terminal.
- 2. according to the method described in claim 1, it is characterized in that, the method further includes:Trunking receives the digital signal that second user terminal is sent, and the digital signal that the second user terminal is sent Carrier signal is converted to, the carrier signal of conversion is sent to the headend.
- 3. method according to claim 1 or 2, it is characterised in that the headend, trunking, terminal device are adopted The uplink signal is handled with OFDM modulation systems, and the work frequency of itself is determined according to the transmission quality of the uplink signal Rate.
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