CN107147463A - A kind of GPON carries the method and system of base station passed-back traffic - Google Patents
A kind of GPON carries the method and system of base station passed-back traffic Download PDFInfo
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- CN107147463A CN107147463A CN201710305096.6A CN201710305096A CN107147463A CN 107147463 A CN107147463 A CN 107147463A CN 201710305096 A CN201710305096 A CN 201710305096A CN 107147463 A CN107147463 A CN 107147463A
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- Prior art keywords
- clock signal
- base station
- ont
- sent
- signal
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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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0201—Add-and-drop multiplexing
- H04J14/0202—Arrangements therefor
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
Abstract
The invention discloses a kind of method that GPON carries base station passed-back traffic, it is related to communication technical field, optical sender is launched and upper layer network identical clock signal, and all ONT Optical Network Terminal ONT are sent to by Optical Distribution Network ODN, clock signal is sent to the base station of connection corresponding with ONT by ONT, and the data-signal of user terminal is synchronously returned to upper layer network by base station according to clock signal.The method that the GPON that the present invention is provided carries base station passed-back traffic, can keep clock synchronous, it is ensured that the quality of high speed transmission data.
Description
Technical field
The present invention relates to communication technical field, and in particular to a kind of GPON carries the method and system of base station passed-back traffic.
Background technology
Passive multi-plexing light accessing system GPON technologies are latest generation broadband passive light Integrated access standards, with high bandwidth, high
Efficiency, large coverage, user interface is abundant to wait many merits, and realization access network service broadband is considered as by most of operators
Change, the desirable technique of synthesization transformation.
The fundamental block diagram of GPON systems as shown in Figure 1, the optical link that GPON systems include being installed on console for centralized control is whole
The ONT Optical Network Terminal ONT of OLT, the Optical Distribution Network ODN comprising Passive Optical Components and user terminal, ONT is held to be connected with base station,
OLT is connected with upper layer network, and GPON systems can provide the user the multiple business such as data, voice, IPTV, really realizes three nets
Fusion.
For 4G and the technical requirements of 5G mobile communication in future, base station equipment is needed and the local side apparatus of the OLT first line of a couplet is kept
Clock is synchronous, and deviation range will be maintained at millisecond even nanosecond rank, it is desirable to which very high, in general, base station equipment can make
Synchronous timing signal is obtained with GPS, but there is fault rate height in this scheme, cost is high, and antenna, which is installed, addresses difficult, erector
Journey amount is big, the problems such as aggravating cost of investment and be difficult in maintenance, it is necessary to which the clock that base station is solved by other approach is synchronously asked
Topic, transmits synchronizing clock signals to base station by the return network of base station, is a perfect solution of comparison.Traditional
GPON systems do not carry out the transmission of clock sync signal, therefore, how to solve the transmission of the clock signal of GPON internal systems,
The problem of being current urgent need to resolve.
The content of the invention
For defect present in prior art, base station passed-back traffic is carried it is an object of the invention to provide a kind of GPON
Method, clock can be kept synchronous, it is ensured that the quality of high speed transmission data.
To achieve the above objectives, the present invention is adopted the technical scheme that：
A kind of method that GPON carries base station passed-back traffic, optical sender transmitting and upper layer network identical clock signal,
And all ONT Optical Network Terminal ONT, the ONT are sent to by Optical Distribution Network ODN are sent to the clock signal and institute
The base station of ONT correspondence connections is stated, the base station is according to the clock signal synchronously returns to the data-signal of user terminal
Upper layer network.
On the basis of above-mentioned technical proposal, following steps are specifically included：
S1：The upper layer network sends data-signal to optical line terminal OLT, and the OLT sends the data-signal
To wave multiplexer, meanwhile, optical sender modulation and the upper layer network identical clock signal, and it is sent to wave multiplexer；
S2：Clock signal after the data-signal and modulation is carried out wavelength-division multiplex by the wave multiplexer, and by described
ODN is sent to all ONT, and the ONT demodulates the clock signal, and is sent to the base station of connection corresponding with the ONT.
On the basis of above-mentioned technical proposal, the data-signal is different with clock signal wavelength.
On the basis of above-mentioned technical proposal, step S1 also includes step：When the optical sender is by described after modulation
Clock signal is sent to image intensifer, and the image intensifer amplifies the clock signal, and the clock signal after amplification is sent out
Give wave multiplexer.
On the basis of above-mentioned technical proposal, the ONT is demodulated after the clock signal, and the clock signal is put
Big and Shape correction, and pass through phase lock loop locks, it is then forwarded to the base station.
Present invention also offers the system that a kind of GPON carries base station passed-back traffic, including：Upper layer network, optical sender,
Optical Distribution Network ODN, some ONT Optical Network Terminal ONT and the base station of some connections corresponding with the ONT；
The optical sender is used to launch and upper layer network identical clock signal, and is sent to the ODN；The ODN
For receiving the clock signal, and it is sent to the ONT；The ONT is used to receive the clock signal, and is sent to therewith
The base station of correspondence connection；The base station is used to the data-signal of user terminal is synchronously returned into institute according to the clock signal
State upper layer network.
On the basis of above-mentioned technical proposal, in addition to optical line terminal OLT and wave multiplexer, the OLT is for receiving institute
The data-signal of upper layer network transmission is stated, and the data-signal is sent to the wave multiplexer；
The optical sender is additionally operable to modulate the clock signal, and the clock signal after modulation is sent into multiplex
Device；
The wave multiplexer is used to receive and data-signal described in wavelength-division multiplex and the clock signal after modulation, and by ripple
The signal divided after multiplexing is sent to all ONT by the ODN；
The ONT is additionally operable to demodulate the clock signal received, and the clock signal after demodulation is sent to
The base station of connection corresponding with the ONT.
On the basis of above-mentioned technical proposal, the data-signal is different with clock signal wavelength.
On the basis of above-mentioned technical proposal, the system also includes image intensifer, and the image intensifer is used to receive simultaneously
Amplify the clock signal after the optical sender modulation.
On the basis of above-mentioned technical proposal, the ONT is additionally operable to after the clock signal is demodulated believe the clock
Number it is amplified and Shape correction, and passes through phase lock loop locks, is then forwarded to the base station.
Compared with prior art, the advantage of the invention is that：The method that the GPON of the present invention carries base station passed-back traffic, can
To keep clock synchronous, it is ensured that the quality of high speed transmission data.
Brief description of the drawings
Fig. 1 is the system schematic of GPON carrying base station passed-back traffics in the embodiment of the present invention；
Fig. 2 is the method flow diagram of GPON carrying base station passed-back traffics in the embodiment of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
The embodiment of the present invention provides a kind of method that GPON carries base station passed-back traffic, optical sender transmitting and upper layer network
Identical clock signal, and all ONT Optical Network Terminal ONT are sent to by Optical Distribution Network ODN, ONT sends clock signal
The base station of ONT correspondence connections is given, the data-signal of user terminal is synchronously returned to upper layer network by base station according to clock signal.
Shown in Figure 2, the method for GPON carryings base station passed-back traffic specifically includes following steps in the embodiment of the present invention：
S1：Upper layer network sends data-signal to optical line terminal OLT, and data-signal is sent to wave multiplexer by OLT, together
When, optical sender is modulated and upper layer network identical clock signal, and is sent to wave multiplexer；
S2：Clock signal after data-signal and modulation is carried out wavelength-division multiplex by wave multiplexer, and is sent to by ODN all
ONT, ONT demodulation clock signals, and be sent to the base station of connection corresponding with ONT.
In the present embodiment, data-signal is different with clock signal wavelength.Step S1 also includes：Optical sender is by after modulation
Clock signal is sent to image intensifer, image intensifer amplification clock signal, and the clock signal after amplification is sent into wave multiplexer.
In step S2, after ONT demodulation clock signals, clock signal is amplified and Shape correction, and passes through phase lock loop locks, then sent out
Give base station.
It is shown in Figure 1, the system that a kind of GPON carries base station passed-back traffic is also provided in the embodiment of the present invention, including：
Upper layer network, optical line terminal OLT, optical sender, image intensifer, wave multiplexer, Optical Distribution Network ODN, some ONT Optical Network Terminals
ONT and the base station of some connections corresponding with ONT.
Optical sender is used to launch and upper layer network identical clock signal and modulation clock signal, and is sent to light
Amplifier；Image intensifer is used to receiving and amplifying the clock signal after optical sender modulation, and the clock signal after modulation is sent out
Give wave multiplexer；OLT is used for the data-signal for receiving upper layer network transmission, and data-signal is sent into wave multiplexer；Wave multiplexer
For the clock signal received and after wavelength division multiplexed data signal and modulation, and the signal after wavelength-division multiplex is sent to ODN；
ODN is used to receive the clock signal after wavelength-division multiplex, and is sent to all ONT；ONT is used to receive clock signal and demodulation
The clock signal received, and the clock signal after demodulation is amplified, Shape correction and phase lock loop locks, be then forwarded to
The base station of connection corresponding with ONT.Base station is used to the data-signal of user terminal is synchronously returned into upper layer network according to clock signal.
Data-signal is different with clock signal wavelength.
In the present embodiment, ONT is amplified to the clock signal after demodulation, Shape correction and phase lock loop locks, can be with
The clock signal of outputting high quality.
The method that the GPON of the present invention carries base station passed-back traffic, base station is according to clock signal by the data-signal of user terminal
Upper layer network synchronously is returned to, the clock signal of base station and the clock signal of upper layer network can be made to keep synchronous, so as to ensure
The quality of high speed transmission data.
After tested, the method that base station passed-back traffic is carried using above-mentioned GPON, it is ensured that the clock signal essence of ONT outputs
Degree is consistent with the clock signal of upper layer network within 200ns, meets required precision of the 4G base stations to clock signal.
The present invention is not limited to the above-described embodiments, for those skilled in the art, is not departing from
On the premise of the principle of the invention, some improvements and modifications can also be made, these improvements and modifications are also considered as the protection of the present invention
Within the scope of.The content not being described in detail in this specification belongs to prior art known to professional and technical personnel in the field.
Claims (10)
1. a kind of method that GPON carries base station passed-back traffic, it is characterised in that：Optical sender is launched and upper layer network identical
Clock signal, and all ONT Optical Network Terminal ONT are sent to by Optical Distribution Network ODN, the ONT sends out the clock signal
The base station of connection corresponding with the ONT is given, the base station synchronously returns the data-signal of user terminal according to the clock signal
It is transmitted to the upper layer network.
2. the method that GPON as claimed in claim 1 carries base station passed-back traffic, it is characterised in that specifically include following step
Suddenly：
S1：The upper layer network sends data-signal to optical line terminal OLT, and the data-signal is sent to conjunction by the OLT
Ripple device, meanwhile, optical sender modulation and the upper layer network identical clock signal, and it is sent to wave multiplexer；
S2：Clock signal after the data-signal and modulation is carried out wavelength-division multiplex by the wave multiplexer, and is sent out by the ODN
All ONT are given, the ONT demodulates the clock signal, and is sent to the base station of connection corresponding with the ONT.
3. the method that GPON as claimed in claim 2 carries base station passed-back traffic, it is characterised in that：The data-signal and when
Clock signal wavelength is different.
4. the method that GPON as claimed in claim 2 carries base station passed-back traffic, it is characterised in that step S1 also includes step
Suddenly：The clock signal after modulation is sent to image intensifer by the optical sender, and the image intensifer amplifies the clock
Signal, and the clock signal after amplification is sent to wave multiplexer.
5. the method that GPON as claimed in claim 2 carries base station passed-back traffic, it is characterised in that：The ONT demodulation is described
After clock signal, the clock signal is amplified and Shape correction, and passes through phase lock loop locks, be then forwarded to the base
Stand.
6. the system that a kind of GPON carries base station passed-back traffic, it is characterised in that including：Upper layer network, optical sender, light distribution
Network ODN, some ONT Optical Network Terminal ONT and the base station of some connections corresponding with the ONT；
The optical sender is used to launch and upper layer network identical clock signal, and is sent to the ODN；The ODN is used for
The clock signal is received, and is sent to the ONT；The ONT is corresponded to therewith for receiving the clock signal, and being sent to
The base station of connection；The base station is described for synchronously being returned to the data-signal of user terminal according to the clock signal
Layer network.
7. the system that a kind of GPON as claimed in claim 6 carries base station passed-back traffic, it is characterised in that：Also include optical link
Terminal OLT and wave multiplexer, the OLT are used to receive the data-signal that the upper layer network is sent, and the data-signal is sent out
Give the wave multiplexer；
The optical sender is additionally operable to modulate the clock signal, and the clock signal after modulation is sent into wave multiplexer；
The wave multiplexer is used to receive and data-signal described in wavelength-division multiplex and the clock signal after modulation, and wavelength-division is answered
Signal after is sent to all ONT by the ODN；
The ONT is additionally operable to demodulate the clock signal received, and the clock signal after demodulation is sent to and institute
State the base station of ONT correspondence connections.
8. the system that a kind of GPON as claimed in claim 7 carries base station passed-back traffic, it is characterised in that：The data-signal
It is different with clock signal wavelength.
9. the system that a kind of GPON as claimed in claim 6 carries base station passed-back traffic, it is characterised in that：The system is also wrapped
Image intensifer is included, the image intensifer is used to receiving and amplifying the clock signal after the optical sender modulation.
10. the system that a kind of GPON as claimed in claim 6 carries base station passed-back traffic, it is characterised in that：The ONT is also used
The clock signal is amplified and Shape correction in after the clock signal is demodulated, and passes through phase lock loop locks, then sent out
Give the base station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710305096.6A CN107147463A (en) | 2017-05-03 | 2017-05-03 | A kind of GPON carries the method and system of base station passed-back traffic |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710305096.6A CN107147463A (en) | 2017-05-03 | 2017-05-03 | A kind of GPON carries the method and system of base station passed-back traffic |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108882255A (en) * | 2018-06-15 | 2018-11-23 | 上海中兴易联通讯股份有限公司 | A kind of framework of the PON carrying room household LTE subsystem |
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| CN102045322A (en) * | 2009-10-23 | 2011-05-04 | 中兴通讯股份有限公司 | Network system and method for information synchronization in same |
| CN201830258U (en) * | 2010-05-19 | 2011-05-11 | 大唐移动通信设备有限公司 | Time-signal transmission system and equipment |
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2017
- 2017-05-03 CN CN201710305096.6A patent/CN107147463A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060188257A1 (en) * | 2005-01-27 | 2006-08-24 | Samsung Electronics Co.; Ltd | Method for transmitting data in synchronous Ethernet passive optical network |
| CN102045322A (en) * | 2009-10-23 | 2011-05-04 | 中兴通讯股份有限公司 | Network system and method for information synchronization in same |
| CN201830258U (en) * | 2010-05-19 | 2011-05-11 | 大唐移动通信设备有限公司 | Time-signal transmission system and equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108882255A (en) * | 2018-06-15 | 2018-11-23 | 上海中兴易联通讯股份有限公司 | A kind of framework of the PON carrying room household LTE subsystem |
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Application publication date: 20170908 |