CN203554445U - High-reliability railway GSM-R digital optical fiber repeater - Google Patents
High-reliability railway GSM-R digital optical fiber repeater Download PDFInfo
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- CN203554445U CN203554445U CN201320683596.0U CN201320683596U CN203554445U CN 203554445 U CN203554445 U CN 203554445U CN 201320683596 U CN201320683596 U CN 201320683596U CN 203554445 U CN203554445 U CN 203554445U
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Abstract
The utility model provides a high-reliability railway GSM-R digital optical fiber repeater comprising near-end machines, far-end machines and an operation maintenance center. The near-end machines are connected with a base station via couplers and connected with the far-end machines via optical fibers and connected with the operation maintenance center via FE interfaces. The near-end machines and the far-end machines comprise primary path signals and secondary path signals which are accessed to two base station information sources respectively. Networking is formed by two paths of signals of multiple near-end machines and far-end machines. The primary and secondary signals are interleaved so that crossing and coverage of base station signals from roots can be realized. Each module in the near-end machines and the far-end machines has redundant backup. The high-reliability railway GSM-R digital optical fiber repeater has a single network interleaving and covering function so that coverage requirements of a CTCS-3 level train control system can be met. Besides, stability of the system is greatly enhanced via redundant backup of each module.
Description
Technical field
The utility model relates to railway signal transmission field, specifically a kind of railway GSM-R digital optical fiber repeater station of high reliability.
Background technology
At present, domestic market, simulation repeater has presented low-cost competition situation.Along with the further reduction of digital high-frequency amplification station cost, digital high-frequency amplification station will progressively replace simulation repeater.
Digital high-frequency amplification station has the features such as networking capability is strong, covering power is strong, noise is low, low in energy consumption, convenient debugging, failure rate is low, through in a few years development, has been tending towards ripe, indispensable in public network 2G/3G networking.
Many-sided advanced functions such as following repeater should possess multi-mode, intellectuality, low energy consumption, low cost, Operation and Maintenance is simple, highly reliable, extensibility is strong, and will be to the development in an all-round way of digitlization direction.
Digital optical fiber direct station and ICS repeater are the emphasis of current repeater development.Digital technology development and application table reveal and the more advantage of analogue technique and feature, the particularly development of software radio, with software, realize the function and application that originally could realize with hardware device, this volume, performance, equipment life, use material to equipment, all has real meaning to timely, the accurate and convenience of debugging.
Existing public network digital optical fiber repeater system, reliability does not reach the requirement of railway applications.Therefore along with domestic high-speed railway fast development, the digital optical fiber direct station of high reliability is that railway feeble field covers main product from now on.
Utility model content
The utility model provides a kind of railway GSM-R digital optical fiber repeater station of high reliability, realizes master and slave double loop, meets single net covering function that interweaves, and reliability is high, and stability is high.
The utility model comprises near-end machine, remote termination and operation maintenance center, near-end machine is connected with base station by coupler, by optical fiber, be connected with remote termination, by FE interface, be connected with operation maintenance center, near-end machine and remote termination include main path signal He Cong road signal, two paths of signals accesses respectively two base station information sources, and the two paths of signals of several near-end machines and remote termination forms respectively networking, and principal and subordinate's signal interleaving makes base station signal intersect and cover from root.
Further improve, in described near-end machine and remote termination, each module all has redundancy backup.
Further improve, described near-end machine and the connected mode of remote termination are star, chain, ring-like, single base station type or the Dual base stations type that interweaves that interweaves.
Further improve, described remote termination main path signal power ratio is from the high 6 ± 1db of road signal.
Further improve, between described near-end machine and remote termination, there is Ethernet pass-through channel or RS232 pass-through channel.
Further improve, described remote termination adopts leakage cable or antenna to carry out signal covering.
Further improve, described remote termination is equipped with light bypass.
The utility model beneficial effect is:
1, have single net covering function that interweaves, meet CTCS-3 level train control system coverage requirement, when main path signal fault, system is switched to from road signal and works on; When the remote termination machine of delaying, the remote termination of the right and left can cover by root, can not affect wireless signal proper communication, has increased greatly the reliability of system.
2, in near-end machine and remote termination, each module, by redundancy backup, when a certain module breaks down, automatically switches to spare module, and the system that do not affect is normally worked.
3, remote termination is equipped with light bypass, when a certain remote equipment power down or light are sent out alarm, automatically switches to light bypass, and its remote equipment of connecting below can normally receive fiber-optic signal.
4, remote termination main path signal power ratio, from the high 6 ± 1db of road signal, when the base station signal machine of delaying of main road is switched to from road signal, improves 6 ± 1dB from road signal automatically, has prevented the frequent switching of signal between principal and subordinate road.
5, operation maintenance center measures in real time the time delay between each remote termination and near-end machine and regulates, by consistent the time delay furnishing between any two remote terminations, can effectively prevent the co-channel interference that each far-end covers, can also eliminate the delay dispersion problem between overlapping covering between far-end list by adjusting time delay.
Accompanying drawing explanation
Fig. 1 is a kind of embodiment schematic diagram of GSM-R digital optical fiber direct station.
Fig. 2 is a kind of embodiment schematic diagram of near-end machine.
Fig. 3 is a kind of embodiment schematic diagram of remote termination.
Fig. 4 is near-end machine and remote termination Y-connection schematic diagram.
Fig. 5 is near-end machine and remote termination chain connection diagram.
Fig. 6 is near-end machine and the ring-like connection diagram of remote termination.
Fig. 7 is near-end machine and the remote termination list base station type schematic diagram that interweaves.
Fig. 8 is near-end machine and the remote termination Dual base stations type schematic diagram that interweaves.
Fig. 9 is for leaking cable type near-end machine structural representation.
Figure 10 is for leaking cable type remote termination structural representation.
Figure 11 is that embedded leakage cable monitoring modular forms schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Fig. 1 is a kind of embodiment schematic diagram of GSM-R digital optical fiber direct station, comprise near-end machine, remote termination and operation maintenance center, near-end machine is connected with base station by coupler, by optical fiber, be connected with remote termination, by FE interface, be connected with operation maintenance center, near-end machine and remote termination include main path signal He Cong road signal, two paths of signals accesses respectively two base station information sources, the two paths of signals of several near-end machines and remote termination forms respectively networking, and principal and subordinate's signal interleaving makes base station signal intersect and cover from root.
Near-end machine structure as depicted in figs. 1 and 2, is drawn together connected frequency-variable module and digital intermediate frequency plate, and frequency-variable module is connected to base station by duplexer, and frequency-variable module is all connected with power module and monitoring unit with digital intermediate frequency plate.
Remote termination structure as shown in figures 1 and 3, adopt and leak cable or antenna cover, comprise connected digital intermediate frequency plate and frequency-variable module, digital intermediate frequency plate is connected by optical fiber with the digital intermediate frequency plate in near-end machine, frequency-variable module is connected into antenna or is leaked cable by power amplifier and duplexer successively, antenna or leakage cable are linked back on frequency-variable module by filter and LNA module, and each module is all connected with power module and monitoring unit.
The general work pattern of equipment is as follows:
1) near-end machine receives the signal of GSM-R mobile communication base station, by frequency-variable module, be down-converted to intermediate-freuqncy signal, through analog signal/digital signal, be transformed into digital signal, by digital base band processor unit, digital signal packed and be converted to serial data mode, then sending to remote termination through fiber optical transceiver;
2) remote termination receives the descending digital signal of near-end machine, by digital base band processor unit solution frame, the frequency of by digital filtering mode, each system being selected again carries out digital filtering processing, the digital signal obtaining is reverted to intermediate-freuqncy signal, through frequency-variable module, upconvert to GSM-R frequency again, through transmitter, launch;
3) the up signal that remote termination receives from GSM-R mobile terminal is after remote termination receiving subsystem receives, by frequency-variable module, be down-converted to intermediate-freuqncy signal, then be transformed into digital signal, carry out after digital noise reduction processing simultaneously, by optical fiber transmission, get back to near-end machine, the signal that near-end machine is converted to GSM-R mobile communication base station by digital signal is issued base station reception again;
4) the main path signal He Cong road signal of near-end machine and remote termination looping networking respectively, makes two base station cell signals intersect and cover from root, and when a remote termination is delayed machine, the remote termination of the right and left covers signal from root, replaces the remote termination work of the machine of delaying.
Functions of the equipments require as follows:
1. the inhibition of making an uproar of the up end
Equipment is supported the inhibition of making an uproar of the up end, meets following functions requirement:
A) separately the up link of each remote equipment DRRU is controlled, reduced upstream noise phase mutual interference between each remote equipment DRRU, eliminate the up noise jamming to base station;
B) equipment adopts carrier wave frequency selection method, and the carrier frequency only information source community being used amplifies, and filtering inoperative frequency reduces the upstream noise level that arrives base station;
C) support time slot automatic cut-off function, for the time slot being under idle condition, turn-off, further reduce upstream noise.
2. automatic delay adjustment
Equipment is supported automatic delay adjustment, meets following functions requirement:
A) measure in real time the time delay between each remote termination DRRU and near-end machine DMU, should support mode manually or automatically to regulate, should be by consistent the time delay furnishing between any two DRRU, effectively prevent the co-channel interference that each far-end covers.
B) by adjusting time delay, eliminate the delay dispersion problem between overlapping covering between far-end list.
3. multiple redundancy group net mode
Between near-end machine and remote termination equipment, support star, chain, ring-like, the redundancy group net modes such as type interweave.
4. light bypass functionality
Remote termination equipment should possess light bypass functionality, when a certain remote termination device looses power or light are sent out alarm, automatically switches to light bypass, and its remote termination equipment of connecting below can normally receive fiber-optic signal.
5. should adopt CPRI standard transmission interface and Digital Optical Terminal technology
A) radiofrequency signal does not decay with the decay of light signal, in long distance and many shunt transmitting procedures, keeps dynamic range constant;
B) support calculating and the correction to digital propagation delay time;
C) support daisy chain transmission means and signal repeatedly to regenerate;
D) Digital Optical Terminal should possess high stability and high reliability, reduces maintenance cost.
6. there is redundancy diversity reception function
Consider the link balance problem covering, up have a redundancy takeover diversity function, and takeover diversity function can obtain extra diversity gain, thereby balance sysmte uplink and downlink link signal has effectively improved the anti-fading property of upward signal.
7. automatic carrier track
When base station changes carrier frequency, remote termination changes from motion tracking carrier wave.
8. high speed pass-through channel
Between the digital intermediate frequency plate of near-end machine and remote termination, there is Ethernet pass-through channel (Ethernet transmission rate >=100Mbps) or RS232(RS232 transmission rate >=38400bps) pass-through channel.
9. network management function
<1> local monitor function
Local monitor function should meet following requirement:
I) by computer connection device;
Ii) should be supported between DMU and DRRU and switch arbitrarily;
Iii) should possess parameter is inquired about and the function such as setting, alarm inquiry and software download.
<2> remote maintenance functions
Remote maintenance functions should meet following requirement:
I) should support Ethernet mode that monitor data is accessed to Surveillance center;
Ii) support parameter to inquire about and setting, alarm inquiry;
Iii) support remote download function.
System feature is as follows:
1, single net covering that interweaves
there is the redundant cover of neighbor cell signal, adopt the master and slave soverlay technique that interweaves.As shown in Figure 7, two base station cell signals intersect and cover from root, in order to prevent frequent switching, remote termination main signal, than from the high 6dB of signal, when the base station signal on active and standby road is delayed after machine, improves 6dB automatically from road, guarantee to continue to cover, when the remote termination machine of delaying, the remote termination of the right and left can cover by root, can not affect wireless signal proper communication.
Adopt the GSM-R covering that interweaves, should meet the following requirements:
A) near, remote termination should arrange main road He Cong road, accesses respectively two base station information sources;
B) main road He Cong road all adopts ring-shaped network;
C) automatically to control main road Yu Cong road signal power difference be 6 ± 1dB to far-end function.
D) after remote termination main path signal fault, automatically close main road, and automatic lifting is from road signal power 6dB.
E) webmaster is supported main road, from road near-end machine, remote termination is managed and controlled.
2, module redundancy backup
The redundancy backup of the critical components such as power module, optical module, power amplifier module, monitoring unit, digital intermediate frequency conversion module (digital intermediate frequency plate and frequency-variable module are integrated), and possess automatic switching function.
2.1 power module Hot Spares
Power module should adopt parallel way to connect, but power module outlet mouth need be considered safeguard measure.Main power supply should adopt Hot Spare mode, must guarantee seamless switching between power module.
2.2 optical module redundancy backups
Equipment should adopt light bypass, loop fashion, makes optical module have redundant backup function.Connected mode as shown in Figure 1.
2.3 power amplifier module redundancy backups
Remote termination should adopt active and standby power amplifier mode to carry out redundancy backup.Direct discharging station acquiescence work power amplifier be primary be that primary power amplifier radio-frequency (RF) switch is opened, standby power amplifier radio-frequency (RF) switch is closed.When primary power amplifier breaks down (can analog amplifier fault warning), equipment automatically switches to standby power amplifier and first closes primary power amplifier switch, then opens standby power amplifier switch.
Power amplifier switching should have manual switchover function and can to power amplifier, work power amplifier be manually set by debugging software or webmaster.Connected mode as shown in Figure 3.
2.4 monitoring unit redundancy backups
Direct discharging station acquiescence job control plate is primary, when master board generation data wire is obstructed or during fault (can simulated failure), and when standby control board operating state is normal, main control board can automatically switch to standby control board, and direct discharging station still can normally be worked; After main control board is recovered, automatically switch to main control board work.
2.5 digital intermediate frequency conversion modules (integrated digital intermediate frequency plate and frequency-variable module) redundancy backup
Direct discharging station should have the backup of digital intermediate frequency conversion module redundancy, and connected mode is shown in shown in Fig. 2 and Fig. 3, the primary signal of primary digital intermediate frequency conversion module controls, and standby digital intermediate frequency conversion module controls is from road signal.
While connecting according to Fig. 1 mode, near-end machine main road He Cong road is connected with the main road He Cong road of same remote termination, realizes redundant backup function.It is that direct discharging station is when normally work that the output signal that requires control board can control standby digital intermediate frequency conversion module has or not, primary digital intermediate frequency conversion module output signal, standby digital intermediate frequency conversion module non-output signal, after primary digital intermediate frequency plate or frequency-variable module break down (can simulated failure), automatically switch to the work of standby digital intermediate frequency conversion module, if after primary digital intermediate frequency conversion module failure all recovers, the primary digital intermediate frequency conversion module work of automatically switching back again.
Fig. 4 to Fig. 8 is near-end machine and remote termination connected mode schematic diagram, comprises star, chain, ring-like, single base station type or the Dual base stations type that interweaves that interweaves.
If remote termination adopts leakage cable, mode covers, and stand alone type leakage cable monitoring equipment needs independent power supply and uses installation, and needs to use extra access device and power splitter or 3dB electric bridge to introduce monitor signal; There are in actual use some inconvenience.Can use embedded leakage cable monitoring equipment, be installed to GSM-R optical fiber repeater far-end machine inside, easy to use and reliable.Leak cable type digital optical fiber direct station formation and see shown in Fig. 9 and Figure 10, the inner composition of embedded leakage cable monitoring modular as shown in Figure 11, comprises monitor board, 5VDC power module, RS232 debug port, electric bridge and two radio station.
The concrete application approach of the utility model is a lot; the above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; do not departing under the prerequisite of the utility model principle; can also make some improvement, these improve and also should be considered as protection range of the present utility model.
Claims (7)
1. the railway GSM-R digital optical fiber repeater station of a high reliability, comprise near-end machine, remote termination and operation maintenance center, near-end machine is connected with base station by coupler, by optical fiber, be connected with remote termination, by FE interface, be connected with operation maintenance center, it is characterized in that: near-end machine and remote termination include main path signal He Cong road signal, two paths of signals accesses respectively two base station information sources, the two paths of signals of several near-end machines and remote termination forms respectively networking, and principal and subordinate's signal interleaving makes base station signal intersect and cover from root.
2. the railway GSM-R digital optical fiber repeater station of high reliability according to claim 1, is characterized in that: in described near-end machine and remote termination, each module all has redundancy backup.
3. the railway GSM-R digital optical fiber repeater station of high reliability according to claim 1 and 2, is characterized in that: described near-end machine and the connected mode of remote termination are star, chain, ring-like, single base station type or the Dual base stations type that interweaves that interweaves.
4. the railway GSM-R digital optical fiber repeater station of high reliability according to claim 1 and 2, is characterized in that: described remote termination main path signal power ratio is from the high 6 ± 1db of road signal.
5. the railway GSM-R digital optical fiber repeater station of high reliability according to claim 1 and 2, is characterized in that: between described near-end machine and remote termination, have Ethernet pass-through channel or RS232 pass-through channel.
6. the railway GSM-R digital optical fiber repeater station of high reliability according to claim 1 and 2, is characterized in that: described remote termination adopts leakage cable or antenna to carry out signal covering.
7. the railway GSM-R digital optical fiber repeater station of high reliability according to claim 1 and 2, is characterized in that: described remote termination is equipped with light bypass.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103595478A (en) * | 2013-11-01 | 2014-02-19 | 南京泰通科技有限公司 | High-reliability GSM-R digital optical fiber repeater and working method thereof |
| CN104506238A (en) * | 2015-01-07 | 2015-04-08 | Comlab（北京）通信***设备有限公司 | Analog repeater |
| CN105188160A (en) * | 2015-09-25 | 2015-12-23 | 南京泰通科技股份有限公司 | GSM-R special distributed base station for railways |
| CN106850032A (en) * | 2017-01-19 | 2017-06-13 | 京信通信技术(广州)有限公司 | The redundancy backup near-end machine of digital optical fiber direct station, remote termination and its system |
| CN106936501A (en) * | 2016-12-27 | 2017-07-07 | 南京泰通科技股份有限公司 | Dual-port GSM R micro-power digital optical fiber direct amplification station equipments |
| CN107070528A (en) * | 2016-12-31 | 2017-08-18 | 南京泰通科技股份有限公司 | The GPS optical fiber repeaters of high reliability railway applications |
| CN112865850A (en) * | 2020-12-31 | 2021-05-28 | 京信网络***股份有限公司 | Repeater station |
| CN114337796A (en) * | 2022-03-02 | 2022-04-12 | 南京典格通信科技有限公司 | Redundancy backup method and system for digital optical fiber repeater |
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2013
- 2013-11-01 CN CN201320683596.0U patent/CN203554445U/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103595478A (en) * | 2013-11-01 | 2014-02-19 | 南京泰通科技有限公司 | High-reliability GSM-R digital optical fiber repeater and working method thereof |
| CN104506238A (en) * | 2015-01-07 | 2015-04-08 | Comlab（北京）通信***设备有限公司 | Analog repeater |
| CN105188160A (en) * | 2015-09-25 | 2015-12-23 | 南京泰通科技股份有限公司 | GSM-R special distributed base station for railways |
| CN106936501A (en) * | 2016-12-27 | 2017-07-07 | 南京泰通科技股份有限公司 | Dual-port GSM R micro-power digital optical fiber direct amplification station equipments |
| CN107070528A (en) * | 2016-12-31 | 2017-08-18 | 南京泰通科技股份有限公司 | The GPS optical fiber repeaters of high reliability railway applications |
| CN106850032A (en) * | 2017-01-19 | 2017-06-13 | 京信通信技术(广州)有限公司 | The redundancy backup near-end machine of digital optical fiber direct station, remote termination and its system |
| WO2018133636A1 (en) * | 2017-01-19 | 2018-07-26 | 京信通信***（中国）有限公司 | Redundant backup near-end machine, remote-end machine and system for digital optical fiber repeater |
| CN106850032B (en) * | 2017-01-19 | 2023-06-20 | 京信网络***股份有限公司 | Redundant backup near-end machine, far-end machine and system of digital optical fiber repeater |
| CN112865850A (en) * | 2020-12-31 | 2021-05-28 | 京信网络***股份有限公司 | Repeater station |
| CN112865850B (en) * | 2020-12-31 | 2022-05-06 | 京信网络***股份有限公司 | Repeater station |
| CN114337796A (en) * | 2022-03-02 | 2022-04-12 | 南京典格通信科技有限公司 | Redundancy backup method and system for digital optical fiber repeater |
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Owner name: NANJING TICOM TECHNOLOGY CO., LTD. Free format text: FORMER NAME: NANJING TAITONG S + T CO., LTD. |
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Address after: Fei Lu Yuhua Economic Development Zone of Nanjing City, Jiangsu Province, No. 210000 12-8 Patentee after: NANJING TICOM TECH Co.,Ltd. Address before: 210039, 35, Hui Feng Avenue, Yuhuatai Economic Development Zone, Nanjing, Jiangsu Patentee before: Nanjing Ticom Science & Technology Co.,Ltd. |
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Granted publication date: 20140416 |