CN201758393U - Digital optical fiber repeater system capable of realizing annular networking self-healing - Google Patents
Digital optical fiber repeater system capable of realizing annular networking self-healing Download PDFInfo
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- CN201758393U CN201758393U CN2010202501774U CN201020250177U CN201758393U CN 201758393 U CN201758393 U CN 201758393U CN 2010202501774 U CN2010202501774 U CN 2010202501774U CN 201020250177 U CN201020250177 U CN 201020250177U CN 201758393 U CN201758393 U CN 201758393U
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Abstract
The utility model relates to the repeater networking technology, in particular to a digital optical fiber repeater system capable of realizing annular networking self-healing. The digital optical fiber repeater system comprises a near-end unit and far-end units, the near-end unit comprises a duplexer, a low-noise amplifier, a frequency converter, a digital intermediate-frequency processing module and an optical fiber receiving and transmitting module which are in series connection successively, each far-end unit is used as a covering end and comprises a duplexer, a power amplifier module/low-noise amplifier, a frequency converter, a digital intermediate-frequency processing module and an optical receiving and transmitting module, an interface of each optical fiber receiving and transmitting module comprises a main port and a secondary port, the main port of the near-end unit is connected with the secondary port of each far-end unit through an optical fiber, the main port of each far-end unit is connected with a secondary port of the next far-end unit, and the far-end units at different levels are connected mutually until the main port of the last far-end unit is connected with the secondary port of the near-end unit, thereby forming an annular network. In addition, the digital optical fiber repeater system can effectively guarantee normal communication of data, and realize self-healing inverted switching when encountering problems of optical fiber open circuits and the like.
Description
Technical field
The present invention relates to the repeater networking technology, but related in particular to a kind of digital optical fiber repeater system of self-healing annular networking.
Technical background
Continuous development along with the 3G communication technology, demand for wireless network construction and wireless coverage increases day by day, and digital optical fiber direct station is because to have an antijamming capability with respect to analog equipment strong, and coverage distance is far away, and networking mode is flexible, has obtained application more and more widely.But at present the repeater networking structure most adopt one nearly one far away point-to-point, perhaps daisy chain, star-like topology.
For above networking mode, all be to adopt an optical fiber link to transmit the up-downgoing data message, this just requires very high for link security.In Fig. 1, near-end machine and four chain networks that remote termination is formed.Optical fiber between remote termination 2 and the remote termination 3 opens circuit, and then the near-end machine can't send to remote termination 3 and remote termination 4 to downlink data, and their upstream data also can't be delivered to the near-end machine, and network produces and opens circuit, and needs personnel's on-site manual to recover.Chain networking can't self-healing recovery, can't be applicable to the field that security requirement is higher.
Summary of the invention
The present invention is intended to overcome the weak point of existing networking mode and a kind of digital optical fiber repeater system of realizing self-healing annular networking is provided, the proper communication of data in its effectively assurance system, when problems such as optical fiber opens circuit occurring, can realize the self-healing switch-down, and device structure is simple, and is with low cost.
Data communication of the present invention has been carried out suitable modification based on the CPRI agreement at the concrete application of digital optical fiber direct station.
For achieving the above object, the present invention is achieved in that
But a kind of digital optical fiber repeater system of self-healing annular networking, it comprises near-end machine and remote termination;
Described near-end machine comprises duplexer, LNA, frequency converter, Digital IF Processing module and the optical fiber transceiver module of serial connection successively;
Described remote termination is as capped end, and it comprises duplexer, power amplifier module/LNA, frequency converter, Digital IF Processing module and the optical fiber transceiver module of serial connection successively;
The interface of described optical fiber transceiver module comprises that master port reaches from port; The master port of described near-end machine links to each other by optical fiber from port with remote termination, the master port of described remote termination links to each other from port with the next stage remote termination, the various level remote termination continues continuous according to this, until the master port of last remote termination and linking to each other of near-end machine from port, the makeup ring l network.
As another kind of scheme, the present invention includes a near-end machine and remote termination;
Described near-end machine can comprise duplexer, LNA, frequency converter, Digital IF Processing module and the optical fiber transceiver module of serial connection successively;
Described remote termination is as capped end, and it comprises duplexer, power amplifier module/LNA, frequency converter, Digital IF Processing module and the optical fiber transceiver module of serial connection successively;
The interface of described optical fiber transceiver module comprises master port; The master port of described near-end machine links to each other by optical fiber from port with remote termination, and the master port of described remote termination links to each other from port with the next stage remote termination, and the various level remote termination continues continuous according to this, forms the chrysanthemum chain structure.
As a kind of preferred version, near-end machine of the present invention can be selected one; Described remote termination is at least one.
Further, Digital IF Processing module of the present invention comprise string also/and string manipulation module, modulus/D/A converter module and FPGA module.
The present invention has realized the networking mode flexibly of direct discharging station under the prerequisite that does not increase hardware cost.A plurality of ports of near-end machine can be realized annular networking, chrysanthemum chain networking simultaneously.And designed distinctive data communications method and realized that self-healing annular networking switches.Optical fiber open circuit and the situation of device damage under, still can guarantee the direct discharging station operate as normal.
Description of drawings
The invention will be further described below in conjunction with the drawings and specific embodiments.Protection scope of the present invention not only is confined to the statement of following content.
Fig. 1 is near-end machine and four chain network diagram that remote termination is formed in the prior art;
Fig. 2 is a system architecture diagram of the present invention;
Fig. 3 is a networking topological diagram of the present invention;
Fig. 4 is a Digital IF Processing module principle block diagram of the present invention.
Embodiment
Referring to Fig. 2, Fig. 3 and shown in Figure 4, but a kind of digital optical fiber repeater system of self-healing annular networking, and it comprises a near-end machine and at least one remote termination;
Described near-end machine comprises duplexer, LNA, frequency converter, Digital IF Processing module and the optical fiber transceiver module of serial connection successively;
Described remote termination is as capped end, and it comprises duplexer, power amplifier module/LNA, frequency converter, Digital IF Processing module and the optical fiber transceiver module of serial connection successively;
The interface of described optical fiber transceiver module comprises that master port reaches from port; The master port of described near-end machine links to each other by optical fiber from port with remote termination, the master port of described remote termination links to each other from port with the next stage remote termination, the various level remote termination continues continuous according to this, until the master port of last remote termination and linking to each other of near-end machine from port, the makeup ring l network.
As another kind of networking mode, the present invention includes a near-end machine and remote termination;
Described near-end machine comprises duplexer, LNA, frequency converter, Digital IF Processing module and the optical fiber transceiver module of serial connection successively;
Described remote termination is as capped end, and it comprises duplexer, power amplifier module/LNA, frequency converter, Digital IF Processing module and the optical fiber transceiver module of serial connection successively;
The interface of described optical fiber transceiver module comprises master port; The master port of described near-end machine links to each other by optical fiber from port with remote termination, and the master port of described remote termination links to each other from port with the next stage remote termination, and the various level remote termination continues continuous according to this, forms the chrysanthemum chain structure.
Digital IF Processing module of the present invention comprise string also/and string manipulation module, modulus/D/A converter module and FPGA module.
But a kind of data communications method of digital optical fiber repeater system of self-healing annular networking comprises the transfer of data of down link and the transfer of data of up link; The transfer of data of described down link is implemented as follows according to this:
(101) the near-end machine is coupled to downstream signal from the base station and amplifies through LNA; Frequency converter transfers radiofrequency signal to intermediate frequency through down-conversion and enters the Digital IF Processing module; Carry out AD conversion then, enter FPGA and carry out digital processing, data are packed according to communication protocol, carry out again and go here and there conversion, encode, send to remote termination on the link by the optical fiber transceiver module successively through master port at last;
(102) remote termination receive downlink data from port after, through decoding, the string and the conversion after enter FPGA; FPGA unpacks according to communication protocols, extracts local IQ data, through Digital Up Convert, enters the DAC digital-to-analogue conversion, upconverts to radiofrequency signal through frequency converter again, is transmitted into antenna then and finishes the radio frequency covering after power amplifier unit amplifies; To not belong to local data simultaneously and repack the back by the farther remote termination of master port transmission in conjunction with the control information of this locality;
(103) after last remote termination receives downstream signal in the loop network link, extract local IQ data, and after will not belonging to local data and repacking, pass confirming of near-end machine back from port in conjunction with local control information;
The transfer of data of described up link is implemented as follows according to this:
(201) each remote termination is amplifying by LNA from the up data of travelling carriage, after frequency converter is down-converted to intermediate frequency, again after the digital intermediate frequency module is handled, repack after synthetic with the up data of optical fiber transceiver module, oppositely be up to the near-end machine step by step along optical fiber;
(202) after the near-end machine receives the up data of remote termination, data are closed the road stack, by with above-mentioned descending inverse process data being sent to the base station, corresponding control information in the while deal with data.
The present invention realizes that the process of self-healing switch-down is as follows when annular networking:
(301) the near-end machine is set up a remote termination location registers control word in advance, sends from near-end machine master port, transmits successively along down link;
(302) after each remote termination received the location registers control word from it from port, the position of registration and record oneself sent to the next stage remote termination from master port then;
(303) after the positional information of registration of last remote termination and record oneself, the location registers control word from its master port send to the near-end machine from port; The near-end machine is confirmed annular link operate as normal according to the Position Control word; Simultaneously the near-end machine do not handle its descending IQ data from port, receive only its control information;
(304) when system breaks down, then this remote termination sends it back near-end machine master port to the location registers control word along former optical fiber is reverse after having registered the positional information of oneself;
(305) the near-end machine confirms specifically to open circuit remote termination according to the positional information control word of sending back, and according to this positional information former annular link is split into two chrysanthemum tandem links;
(306) all remote terminations that are in the link that opens circuit switch its principal and subordinate's port when forming new daisy chain, with the recovered clock of master port in the former looped network reference clock as system.
System of the present invention comprises a near-end machine, and at least one remote termination.The near-end machine generally is positioned at machine room near the base station, by duplexer, and frequency converter, the Digital IF Processing module, at least one pair of optical fiber transceiver module connects to form.Remote termination is as capped end, by duplexer, and power amplifier module, LNA, frequency converter, the Digital IF Processing module, a pair of optical fiber transceiver module connects to form.System configuration as shown in Figure 2.
For near-end machine and remote termination, one a pair of optical module interface is as master port, and another is as from port.The master port of near-end machine links to each other with optical fiber from port with remote termination, and from linking to each other successively from port of the remote termination of the master port of terminal and subordinate, finally the master port of last remote termination and near-end machine links to each other the makeup ring l network from port.As near- end machine 1,2 port among Fig. 3, with remote termination 1,2,3,4 have formed loop network.
Simultaneously, the near-end machine also can be by the topological structure of an optical module interface and many remote termination composition chrysanthemum chains.In Fig. 3,3,4 ports of near-end machine respectively with remote termination 5,6,7 and remote termination 8,9 formed the chain network of serial connection.
So in Fig. 3, network topology structure of the present invention can be configured to hub-and-spoke configuration at main stor(e)y, can be configured to loop configuration and chrysanthemum chain structure flexibly in the sublayer.
The Digital IF Processing module that the present invention relates to is finished modulus/digital-to-analogue conversion, and the optical fiber communication data protocol is handled, Digital Down Convert, up-conversion, the string of data also/and string manipulation, its structure is as shown in Figure 4.
When annular networking, the process of the transfer of data of down link is as follows:
1, the near-end machine is coupled to downstream signal from the base station and amplifies through LNA, and frequency converter transfers radiofrequency signal to intermediate frequency through down-conversion and enters the Digital IF Processing module.Transfer digital signal to by the AD sampling then, enter FPGA and carry out digital processing, data are packed according to communication protocol, enter the SERDES chip again and carry out and go here and there conversion, 10B/8B coding sends to remote termination on the link by optical module through master port at last successively.
2, remote termination receive downlink data from port after, carry out 10B/8B decoding through SERDES, enter FPGA after string and the conversion.FPGA unpacks according to communication protocols, extracts local IQ data through Digital Up Convert, enters the DAC digital-to-analogue conversion, upconverts to radiofrequency signal through frequency converter again, is transmitted into antenna then and finishes the radio frequency covering after power amplifier unit amplifies.To not belong to local data simultaneously and repack the back by the farther remote termination of master port transmission in conjunction with the control information of this locality.
3, after last remote termination receives downstream signal in the loop network link, extract local IQ data, and after will not belonging to local data and repacking, pass confirming of near-end machine back from port in conjunction with local control information.
When annular networking, the process of the transfer of data of up link is as follows:
1, each remote termination is amplifying by LNA from the up data of travelling carriage, after frequency converter is down-converted to intermediate frequency, again after the digital intermediate frequency module is handled, repacks after synthetic with the up data of optical module, prolongs optical fiber and oppositely is up to the near-end machine step by step.
2, after the near-end machine receives the up data of remote termination, data are closed the road stack, by data being sent to the base station with above-mentioned descending inverse process.Corresponding control information in the while deal with data.
When annular networking, realize that the process of self-healing switch-down is as follows:
1, the near-end machine is set up a remote termination location registers control word in advance, sends from near-end machine master port, transmits successively along down link.
2, after each remote termination received the location registers control word from it from port, the position of registration and record oneself sent to the next stage remote termination from master port then.
3, after the positional information of registration of last remote termination and record oneself, the location registers control word from its master port send to the near-end machine from port.The near-end machine is confirmed annular link operate as normal according to the Position Control word.Simultaneously near-end do not handle its descending IQ data from port, receive only its control information.
4, when owing to optical fiber damage or equipment fault, cause any remote termination can't be when the next stage remote termination is communicated by letter, then this remote termination sends it back near-end machine master port to the location registers control word along former optical fiber is reverse after having registered the positional information of oneself.
5, the near-end machine confirms from which platform remote termination generation to open circuit according to the positional information control word of sending back, and according to this positional information former annular link is split into two chrysanthemum tandem links.
6, under the normal condition, remote termination adopt its from the recovered clock of port as the system synchronization clock, so when forming new daisy chain, need switch its principal and subordinate's port at all remote terminations that are in the link that opens circuit, switch to the reference clock of the recovered clock of master port in the former looped network as system.Guarantee the clock synchronization of whole network.
Illustrate above-mentioned self-healing annular networking handoff procedure again below in conjunction with Fig. 3:
A, as among Fig. 3, near-end machine port one, 2 with remote termination 101,201,301,401 have formed loop network.Wherein near-end machine port one is as master port, and port 2 is as from port.Under the situation of looped network operate as normal, downlink data sends from near-end machine master port port one, prolongs optical fiber and passes to remote termination 101,201,301,401 successively.The reverse optical fiber that prolongs is through remote termination 401,301 simultaneously for upstream data, and 201,101 pass the port one of near-end machine back.Remote termination 101,201,301,401 system synchronization clock all are the recovered clock that receives the previous stage data from port one separately.As scheme among the C, remote termination 401 is last remote termination, it passes to near-end machine port 2 with the Position Control word from its port 2.After near-end machine port 2 receives the Position Control word, confirm the loop network operate as normal.
B, when the optical fiber between the remote termination 201,301 opens circuit among the figure, remote termination 201 can't be the descending remote termination 301 of passing to of Position Control word.Then remote termination 201 is passed to remote termination 101 to the Position Control word along former optical fiber link.Remote termination 101 is left intact, and directly passes to the near-end machine.
C, remote termination 301,401 can't receive the Position Control word, are in the network off state.Then remote termination 301,401 all resets to listening state to their two ports, simultaneously the synchronised clock of system is switched to the recovered clock of port 2.
Behind the Position Control word that D, near-end machine reception remote termination 201 are passed back, it is impassable to occur opening circuit between the affirmation remote termination 201,301.The near-end machine switches to master port to its port 2, then forms a new daisy chain serial connection network (referring to Fig. 1) with remote termination 401,301.
Be with being appreciated that, more than about specific descriptions of the present invention, only be used to the present invention is described and be not to be subject to the described technical scheme of the embodiment of the invention, those of ordinary skill in the art is to be understood that, still can make amendment or be equal to replacement the present invention, to reach identical technique effect; Use needs as long as satisfy, all within protection scope of the present invention.
Claims (4)
1. but the digital optical fiber repeater system of a self-healing annular networking is characterized in that, comprises near-end machine and remote termination;
Described near-end machine comprises duplexer, LNA, frequency converter, Digital IF Processing module and the optical fiber transceiver module of serial connection successively;
Described remote termination is as capped end, and it comprises duplexer, power amplifier module/LNA, frequency converter, Digital IF Processing module and the optical fiber transceiver module of serial connection successively;
The interface of described optical fiber transceiver module comprises that master port reaches from port; The master port of described near-end machine links to each other by optical fiber from port with remote termination, the master port of described remote termination links to each other from port with the next stage remote termination, the various level remote termination continues continuous according to this, until the master port of last remote termination and linking to each other of near-end machine from port, the makeup ring l network.
2. but the digital optical fiber repeater system of a self-healing annular networking is characterized in that, comprises a near-end machine and remote termination;
Described near-end machine comprises duplexer, LNA, frequency converter, Digital IF Processing module and the optical fiber transceiver module of serial connection successively;
Described remote termination is as capped end, and it comprises duplexer, power amplifier module/LNA, frequency converter, Digital IF Processing module and the optical fiber transceiver module of serial connection successively;
The interface of described optical fiber transceiver module comprises master port; The master port of described near-end machine links to each other by optical fiber from port with remote termination, and the master port of described remote termination links to each other from port with the next stage remote termination, and the various level remote termination continues continuous according to this, forms the chrysanthemum chain structure.
But 3. the digital optical fiber repeater system of self-healing annular networking according to claim 1 and 2, it is characterized in that: described near-end machine is one; Described remote termination is at least one.
4. but the digital optical fiber repeater system of self-healing annular networking according to claim 3 is characterized in that: described Digital IF Processing module comprise string also/and string manipulation module, modulus/D/A converter module and FPGA module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010202501774U CN201758393U (en) | 2010-07-07 | 2010-07-07 | Digital optical fiber repeater system capable of realizing annular networking self-healing |
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| CN2010202501774U CN201758393U (en) | 2010-07-07 | 2010-07-07 | Digital optical fiber repeater system capable of realizing annular networking self-healing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101902281A (en) * | 2010-07-07 | 2010-12-01 | 奥维通信股份有限公司 | Digital optical fiber repeater system with self-healing annular networking function and data communication method thereof |
-
2010
- 2010-07-07 CN CN2010202501774U patent/CN201758393U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101902281A (en) * | 2010-07-07 | 2010-12-01 | 奥维通信股份有限公司 | Digital optical fiber repeater system with self-healing annular networking function and data communication method thereof |
| CN101902281B (en) * | 2010-07-07 | 2014-05-14 | 奥维通信股份有限公司 | Digital optical fiber repeater system with self-healing annular networking function and data communication method thereof |
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