CN204119529U - Digital fiber remote radio trackside wireless communication system - Google Patents
Digital fiber remote radio trackside wireless communication system Download PDFInfo
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- CN204119529U CN204119529U CN201420391459.4U CN201420391459U CN204119529U CN 204119529 U CN204119529 U CN 204119529U CN 201420391459 U CN201420391459 U CN 201420391459U CN 204119529 U CN204119529 U CN 204119529U
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- 238000004891 communication Methods 0.000 title claims abstract description 39
- 239000000835 fiber Substances 0.000 title claims abstract description 29
- 239000013307 optical fiber Substances 0.000 claims abstract description 12
- 238000012545 processing Methods 0.000 claims description 82
- 230000003287 optical effect Effects 0.000 claims description 54
- 238000012544 monitoring process Methods 0.000 claims description 18
- 238000001914 filtration Methods 0.000 claims description 6
- 230000003321 amplification Effects 0.000 claims description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 4
- 229940123361 Quorum sensing inhibitor Drugs 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
- H04W36/087—Reselecting an access point between radio units of access points
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The utility model relates to communication technical field, particularly relates to a kind of digital fiber remote radio trackside wireless communication system.This digital fiber remote radio trackside wireless communication system comprises near-end machine and some remote terminations; Described near-end machine is connected with a remote termination by optical fiber; Described remote termination connects some other remote terminations by optical fiber in the mode of serial type cascade; Each remote termination is arranged along Along Railway.Compared with prior art, adopt the digital fiber remote radio trackside wireless communication system that the utility model provides, can significantly reduce the train of running at high speed enterprising work news time base station switching frequency, thus ensure the stability that communicates on the train of running at high speed.
Description
Technical field
The utility model relates to communication technical field, particularly relates to a kind of digital fiber remote radio trackside wireless communication system.
Background technology
Along with Large scale construction and the application of domestic high-speed railway, at present for the trackside wireless communication system of high-speed railway, because exist between Doppler frequency shift and coverage cell and frequently switch two large problems, thus the covering of high-speed railway trackside is caused to occur the difficult problem that user terminal communication access interruption rate height even cannot communicate.
Current Domestic Carriers adopts the intensive coverage mode of traditional macro base station, because baseband processing portion mainly towards be ordinary consumption user, the Doppler frequency shift of train high-speed mobile do not revised and optimize, the coverage distance of macro base station is limited simultaneously, quickly through adjacent several base station coverage area, the frequent switching of signal coverage areas can must be caused when train is run at high speed.Based on above 2 points, traditional macro base station coverage mode cannot ensure the stability communicated with the external world on the train of running at high speed.
This problem is frequently switched for evading minizone, what high-speed railway trackside wireless communication system external at present adopted is that analog optical fiber zooms out communication mode, there is the problems such as loss affect greatly, internal noise high, the hardware device quantity of input large, integrated communication efficiency low of communication distance by optical fiber because analog optical fiber zooms out communication, the wireless access of low rate can only be met.Traditional radio frequency stretch system, baseband processing portion is not integrated in near-end machine, and general design and installation is in indoor environment, is not suitable for the engineering actual demand that high-speed railway wire is arranged net.
Utility model content
Technical problem to be solved in the utility model is, provides a kind of digital fiber remote radio trackside wireless communication system, reduces at the enterprising base station switching frequency worked when interrogating of the train of running at high speed.The utility model is achieved in that
A kind of digital fiber remote radio trackside wireless communication system, comprises near-end machine and some remote terminations; Described near-end machine is connected with a remote termination by optical fiber; Described remote termination connects some other remote terminations by optical fiber in the mode of serial type cascade; Each remote termination is arranged along Along Railway.
Further, described near-end machine comprises the baseband processing module, the first digital signal processing module and the first optical module unit that connect successively;
Described baseband processing module is used for baseband signal to encode, and is sent to the first digital signal processing module after the baseband signal after coding is converted to baseband rf signal;
Described first digital signal processing module is used for being sent after the baseband rf signal received from baseband processing module coding by the first optical module unit;
Described first digital signal processing module is also sent to baseband processing module after being decoded by the baseband rf signal received by the first optical module unit;
Described baseband processing module is also converted to baseband signal after being decoded by the baseband rf signal received from the first digital signal processing module.
Further, described first optical module unit comprises two the first optical transceiver modules; Described two the first optical transceiver modules connect a remote termination separately, and the first digital signal processing module of all corresponding with it near-end machine of these two first optical transceiver modules connects.
Further, described near-end machine also comprises the first gigabit ethernet interface be connected with described first digital signal processing module.
Further, described near-end machine also comprises the first monitoring module; Described first monitoring module is connected with described baseband processing module and the first digital signal processing module, for monitoring configuration information and the operating state of described baseband processing module and the first digital signal processing module.
Further, described remote termination comprises the second optical module unit, the second digital signal processing module, power amplifier module unit, filter cell and the antenna element that connect successively;
Described second digital signal processing module is used for being received the baseband rf signal from near-end machine or other remote terminations connected by described second optical module unit and being decoded to it, and is sent to described power amplifier module unit after decoded baseband rf signal is converted to radiofrequency signal;
Described power amplifier module unit is used for being sent to described filter cell by after the radiofrequency signal received from described second optical module unit amplification;
Described filter cell is used for being sent after the radiofrequency signal filtering received from described power amplifier module unit by described antenna element;
Described filter cell is also for being sent to described power amplifier module unit by after the radiofrequency signal received by described antenna element filtering;
Described power amplifier module unit is also sent to described second digital signal processing module after the radiofrequency signal received from described filter cell being amplified;
Described second digital signal processing module is also for encoding the radiofrequency signal received from described power amplifier module unit and being sent by described second optical module unit after being converted to baseband rf signal.
Further, described second optical module unit comprises two the second optical transceiver modules; Described two the second optical transceiver modules be used for its before and after the near-end machine of cascade or remote termination set up cascade connection, and the second digital signal processing module of all corresponding with it remote termination of these two second optical transceiver modules connects.
Further, described power amplifier module unit comprises the first power amplifier module and the second power amplifier module; Described filter cell comprises the first filter and the second filter; Described antenna element comprises the first antenna and the second antenna;
Described first power amplifier module is connected with described first filter; Described first filter is connected with described first antenna;
Described second power amplifier module is connected with described second filter; Described second filter is connected with described second antenna.
Further, described second digital signal processing module is connected with gigabit ethernet interface.
Further, described remote termination also comprises the second monitoring module; Described second monitoring module is connected with described second digital signal processing module and described power amplifier module unit, for monitoring configuration information and the operating state of described second digital signal processing module and described power amplifier module unit.
Further, described near-end machine or remote termination have integrated water-proof cabinet.
Further, described baseband processing module is also connected with GPS interface.
Near-end machine and remote termination also can comprise a power module, for providing operating voltage for each functional module in near-end machine and remote termination or unit.The first optical transceiver module in near-end machine and remote termination and the second optical transceiver module can adopt SFP optical transceiver module, what SFP was " SMALL FORM PLUGGABLE " writes a Chinese character in simplified form, for the meaning of " SFP ", SFP optical transceiver module volume is little, thus make to arrange more optical transceiver module in formed objects space, or reduce the volume of the device adopting optical transceiver module.
Compared with prior art, adopt the digital fiber remote radio trackside wireless communication system that the utility model provides, can significantly reduce the train of running at high speed enterprising work news time base station switching frequency, thus ensure the stability that communicates on the train of running at high speed.
Accompanying drawing explanation
Fig. 1: the digital fiber remote radio trackside wireless communication system that the utility model provides arranges schematic diagram;
Fig. 2: near-end machine structural representation in above-mentioned digital fiber remote radio trackside wireless communication system;
Fig. 3: remote termination structural representation in above-mentioned digital fiber remote radio trackside wireless communication system.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.
As shown in Figure 1, the utility model provides a kind of digital fiber remote radio trackside wireless communication system, and this system comprises near-end machine 1 and some remote terminations 2.Wherein, near-end machine 1 is connected with a remote termination 2 by optical fiber, and this remote termination 2 connects some other remote terminations 2 by optical fiber in the mode of serial type cascade again.Each remote termination 2 is arranged along Along Railway, and quorum sensing inhibitor is carried out in the community (i.e. the other community 6 of rail) that can be used for Along Railway.So-called serial type cascade is so a kind of connected mode: the remote termination 2 be connected with near-end machine 1 and some other remote terminations 2 are connected, like this, each remote termination 2 of series connection can as the node of exchanges data, thus make each remote termination 2 of series connection can carry out exchanges data by other remote terminations 2 be connected between this remote termination 2 and this near-end machine 1 with this near-end machine 1.During signal downlink, near-end machine 1 is for receiving the baseband signal of base station 3, and after baseband signal being converted to baseband rf signal by Optical Fiber Transmission to each remote termination 2 with its serial type cascade, each remote termination 2 sends after again this baseband rf signal being converted to radiofrequency signal, signals reverse process during signal uplink.It can thus be appreciated that the remote termination more than 2 of series connection, the signal of base station 3 just can zoom out place far away, and namely the signal cover of base station 3 is wider.But the remote termination more than 2 of series connection, the issuable delay that communicates is larger, and communication stability also can be affected, and therefore, remote termination 2 quantity of series connection is also conditional.Because these remote terminations 2 of series connection all communicate with same base station 3, therefore, if each remote termination 2 of series connection is arranged along Along Railway interval, make the signal coverage areas seamless connection along the railway of each remote termination 2, so, when train is walked in the signal coverage areas of these remote terminations 2 of connecting, mobile terminal on train does not need to carry out base station 3 and switches, if arrange the digital fiber remote radio trackside wireless communication system that many covers are so along the railway, the train of running at high speed enterprising work news time base station 3 frequently just can be avoided to switch, thus ensure that the stability communicated on the train of running at high speed.
As shown in Figure 2, in this digital fiber remote radio trackside wireless communication system, near-end machine 1 can comprise baseband processing module 101, first digital signal processing module 102 and the first optical module unit 103 that connect successively.Wherein, baseband processing module 101 for baseband signal being encoded, and is sent to the first digital signal processing module 102 after the baseband signal after coding is converted to baseband rf signal; First digital signal processing module 102 is sent by the first optical module unit 103 after being encoded by the baseband rf signal received from baseband processing module 101; First digital signal processing module 102 is also sent to baseband processing module 101 after being decoded by the baseband rf signal received by the first optical module unit 103; Baseband processing module 101 is also converted to baseband signal after being decoded by the baseband rf signal received from the first digital signal processing module 102.
First optical module unit 103 can comprise two the first optical transceiver modules 1031.These two the first optical transceiver modules 1031 connect a remote termination 2 separately, and the first digital signal processing module 102 of these two all corresponding with it near-end machines 1 of the first optical transceiver module 1031 connects.Like this, as shown in Figure 1, near-end machine 1 can serial type cascade multiple stage remote termination 2 in both direction along the railway simultaneously, thus can reduce the layout quantity of near-end machine 1.
Near-end machine 1 also can comprise the first gigabit ethernet interface 106, and this first gigabit ethernet interface 106 is connected with the first digital signal processing module 102, can be used for railway interests and makes other IP-based expanded application.
Near-end machine 1 also can comprise the first monitoring module 104, and this first monitoring module 104 is connected with baseband processing module 101 and the first digital signal processing module 102, can be used for configuration information and the operating state of monitoring baseband processing module 101 and the first digital signal processing module 102.In near-end machine 1, baseband processing module 101 also can connect GPS interface 105, GPS interface 105 for external GPS module, to obtain GPS clock signal, meets the requirement of Base-Band Processing clock synchronous.
For supporting the demand of high-speed railways high-speed mobile, the baseband processing module 101 of near-end machine 1 have employed special Doppler shift measurement and pre-compensation techniques, while guarantee standard 4G terminal transparency, solves the problem of bullet train mobility support.First digital signal processing module 102 of near-end machine 1 have employed the technology of power and delay equalization, solves the consistency problem of quorum sensing inhibitor well.
As shown in Figure 3, in this digital fiber remote radio trackside wireless communication system, remote termination 2 can comprise the second optical module unit 201, second digital signal processing module 202, power amplifier module unit 203, filter cell 204 and the antenna element 205 that connect successively.Wherein, second digital signal processing module 202 is for the baseband rf signal that received by the second optical module unit 201 from near-end machine 1 or other remote terminations 2 connected and decode to it, and is sent to power amplifier module unit 203 after decoded baseband rf signal is converted to radiofrequency signal; Power amplifier module unit 203 is sent to filter cell 204 after the radiofrequency signal received from the second optical module unit 201 being amplified; Filter cell 204 is for sending after the radiofrequency signal received from power amplifier module unit 203 filtering by antenna element 205; Filter cell 204 is also for being sent to power amplifier module unit 203 by after the radiofrequency signal received by antenna element 205 filtering; Power amplifier module unit 203 is also sent to the second digital signal processing module 202 after the radiofrequency signal received from filter cell 204 being amplified; Second digital signal processing module 202 is also for encoding the radiofrequency signal received from power amplifier module unit 203 and being sent by the second optical module unit 201 after being converted to baseband rf signal.
Second optical module unit 201 can comprise two the second optical transceiver modules 2011, these two the second optical transceiver modules 2011 for its before and after the near-end machine 1 of cascade or remote termination 2 set up cascade connection, and the second digital signal processing module 202 of these two all corresponding with it remote terminations 2 of the second optical transceiver module 2011 connects.Remote termination 2 shown in Fig. 3 is the remote termination 2 be directly connected with near-end machine 1, and an one optical transceiver module is connected with near-end machine 1, and another optical transceiver module is connected with another remote termination 2.If not the remote termination 2 be directly connected with near-end machine 1, then two the second optical transceiver modules 2011 of remote termination 2 are all connected with remote termination 2.
Power amplifier module unit 203 can comprise the first power amplifier module 2031 and the second power amplifier module 2032, and filter cell 204 comprises the first filter 2041 and the second filter 2042, and antenna element 205 comprises the first antenna 2051 and the second antenna 2052.Wherein, the first power amplifier module 2031 is connected with the first filter 2041; First filter 2041 is connected with the first antenna 2051; Second power amplifier module 2032 is connected with the second filter 2042; Second filter 2042 is connected with the second antenna 2052.First power amplifier module 2031 and all integrated power amplifier module of the second power amplifier module 2032, all include low noise amplifier and power amplifier.Low noise amplifier is sent to the second digital signal processing module 202 after can be used for that the signal of the first antenna 2051 received through the first filter 2041 or the second filter 2042 or the second antenna 2052 is carried out signal amplification, and, be sent to the first antenna 2051 or the second antenna 2052 through the first filter 2041 or the second filter 2042 after the signal received from the second digital signal processing module 202 is carried out power amplification, then send.
Second digital signal processing module 202 also can connect the second gigabit ethernet interface 206, can be the application needs that client provides more Along Railway business.
Remote termination 2 also can comprise the second monitoring module 208, and this second monitoring module 208 is connected with the second digital signal processing module 202 and power amplifier module unit 203, for monitoring configuration information and the operating state of the second digital signal processing module 202 and power amplifier module unit 203.
In digital fiber remote radio trackside wireless communication system provided by the utility model, near-end machine 1 or remote termination 2 all have integrated water-proof cabinet, and its each functional unit or module are all arranged in this integrated water-proof cabinet, are convenient to be arranged in outdoor.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection range of the present utility model.
Claims (12)
1. a digital fiber remote radio trackside wireless communication system, is characterized in that, comprises near-end machine and some remote terminations; Described near-end machine is connected with a remote termination by optical fiber; Described remote termination connects some other remote terminations by optical fiber in the mode of serial type cascade; Each remote termination is arranged along Along Railway.
2. digital fiber remote radio trackside wireless communication system as claimed in claim 1, it is characterized in that, described near-end machine comprises the baseband processing module, the first digital signal processing module and the first optical module unit that connect successively;
Described baseband processing module is used for baseband signal to encode, and is sent to the first digital signal processing module after the baseband signal after coding is converted to baseband rf signal;
Described first digital signal processing module is used for being sent after the baseband rf signal received from baseband processing module coding by the first optical module unit;
Described first digital signal processing module is also sent to baseband processing module after being decoded by the baseband rf signal received by the first optical module unit;
Described baseband processing module is also converted to baseband signal after being decoded by the baseband rf signal received from the first digital signal processing module.
3. digital fiber remote radio trackside wireless communication system as claimed in claim 2, it is characterized in that, described first optical module unit comprises two the first optical transceiver modules; Described two the first optical transceiver modules connect a remote termination separately, and the first digital signal processing module of all corresponding with it near-end machine of these two first optical transceiver modules connects.
4. digital fiber remote radio trackside wireless communication system as claimed in claim 2, it is characterized in that, described near-end machine also comprises the first gigabit ethernet interface be connected with described first digital signal processing module.
5. digital fiber remote radio trackside wireless communication system as claimed in claim 2, it is characterized in that, described near-end machine also comprises the first monitoring module; Described first monitoring module is connected with described baseband processing module and the first digital signal processing module, for monitoring configuration information and the operating state of described baseband processing module and the first digital signal processing module.
6. digital fiber remote radio trackside wireless communication system as claimed in claim 1, it is characterized in that, described remote termination comprises the second optical module unit, the second digital signal processing module, power amplifier module unit, filter cell and the antenna element that connect successively;
Described second digital signal processing module is used for being received the baseband rf signal from near-end machine or other remote terminations connected by described second optical module unit and being decoded to it, and is sent to described power amplifier module unit after decoded baseband rf signal is converted to radiofrequency signal;
Described power amplifier module unit is used for being sent to described filter cell by after the radiofrequency signal received from described second optical module unit amplification;
Described filter cell is used for being sent after the radiofrequency signal filtering received from described power amplifier module unit by described antenna element;
Described filter cell is also for being sent to described power amplifier module unit by after the radiofrequency signal received by described antenna element filtering;
Described power amplifier module unit is also sent to described second digital signal processing module after the radiofrequency signal received from described filter cell being amplified;
Described second digital signal processing module is also for encoding the radiofrequency signal received from described power amplifier module unit and being sent by described second optical module unit after being converted to baseband rf signal.
7. digital fiber remote radio trackside wireless communication system as claimed in claim 6, it is characterized in that, described second optical module unit comprises two the second optical transceiver modules; Described two the second optical transceiver modules be used for its before and after the near-end machine of cascade or remote termination set up cascade connection, and the second digital signal processing module of all corresponding with it remote termination of these two second optical transceiver modules connects.
8. digital fiber remote radio trackside wireless communication system as claimed in claim 6, it is characterized in that, described power amplifier module unit comprises the first power amplifier module and the second power amplifier module; Described filter cell comprises the first filter and the second filter; Described antenna element comprises the first antenna and the second antenna;
Described first power amplifier module is connected with described first filter; Described first filter is connected with described first antenna;
Described second power amplifier module is connected with described second filter; Described second filter is connected with described second antenna.
9. digital fiber remote radio trackside wireless communication system as claimed in claim 6, it is characterized in that, described second digital signal processing module is connected with gigabit ethernet interface.
10. digital fiber remote radio trackside wireless communication system as claimed in claim 6, it is characterized in that, described remote termination also comprises the second monitoring module; Described second monitoring module is connected with described second digital signal processing module and described power amplifier module unit, for monitoring configuration information and the operating state of described second digital signal processing module and described power amplifier module unit.
11. digital fiber remote radio trackside wireless communication systems as claimed in claim 1, it is characterized in that, described near-end machine or remote termination have integrated water-proof cabinet.
12. digital fiber remote radio trackside wireless communication systems as claimed in claim 2, it is characterized in that, described baseband processing module is also connected with GPS interface.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420391459.4U CN204119529U (en) | 2014-07-15 | 2014-07-15 | Digital fiber remote radio trackside wireless communication system |
| PCT/CN2014/095716 WO2016008271A1 (en) | 2014-07-15 | 2014-12-30 | Digital optical fiber radio remote rail side wireless communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420391459.4U CN204119529U (en) | 2014-07-15 | 2014-07-15 | Digital fiber remote radio trackside wireless communication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204119529U true CN204119529U (en) | 2015-01-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420391459.4U Expired - Fee Related CN204119529U (en) | 2014-07-15 | 2014-07-15 | Digital fiber remote radio trackside wireless communication system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN204119529U (en) |
| WO (1) | WO2016008271A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105763257A (en) * | 2016-04-25 | 2016-07-13 | 北京科技大学 | High-speed rail communication system |
| CN107786962A (en) * | 2017-10-20 | 2018-03-09 | 北京凤凰汇通科技有限公司 | Radio communication device and radio communication group row |
| CN107835052A (en) * | 2017-10-20 | 2018-03-23 | 北京凤凰汇通科技有限公司 | Wireless communications method |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108363087B (en) * | 2018-04-10 | 2023-09-26 | 厦门信同信息技术有限公司 | Railway positioning system using repeater and positioning method thereof |
| CN114189875A (en) * | 2021-10-26 | 2022-03-15 | 江苏通鼎宽带有限公司 | 5G4T4R intelligent distributed remote system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200973095Y (en) * | 2004-11-05 | 2007-11-07 | 京信通信系统（广州）有限公司 | Mobile communication digital optical fibre directly amplifying application system |
| CN101488811A (en) * | 2008-03-27 | 2009-07-22 | 赛乐(天津)微波科技有限公司 | Base station carrier optical fiber zooming distributed system based wave division multiplex mode |
| CN102006683B (en) * | 2010-11-27 | 2013-01-16 | 武汉虹信通信技术有限责任公司 | Digital radio-frequency remote system applied to double-communication system |
-
2014
- 2014-07-15 CN CN201420391459.4U patent/CN204119529U/en not_active Expired - Fee Related
- 2014-12-30 WO PCT/CN2014/095716 patent/WO2016008271A1/en active Application Filing
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105763257A (en) * | 2016-04-25 | 2016-07-13 | 北京科技大学 | High-speed rail communication system |
| CN107786962A (en) * | 2017-10-20 | 2018-03-09 | 北京凤凰汇通科技有限公司 | Radio communication device and radio communication group row |
| CN107835052A (en) * | 2017-10-20 | 2018-03-23 | 北京凤凰汇通科技有限公司 | Wireless communications method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016008271A1 (en) | 2016-01-21 |
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