CN1282310C - Underground space passive relay communication system - Google Patents
Underground space passive relay communication system Download PDFInfo
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- CN1282310C CN1282310C CN 200410012171 CN200410012171A CN1282310C CN 1282310 C CN1282310 C CN 1282310C CN 200410012171 CN200410012171 CN 200410012171 CN 200410012171 A CN200410012171 A CN 200410012171A CN 1282310 C CN1282310 C CN 1282310C
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- passive repeater
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Abstract
The present invention discloses a passive relay communication system for an underground space, which relates to a relay device for communication in an underground space and belongs to the technical field of the communication. The passive relay communication system is composed of fixed or movable base stations, fixed or movable passive relay devices, a power distribution synthesizer, cables with low loss, etc. The passive relay devices are simultaneously arranged on tunnels and locomotives according to the relationship between the transmission coefficients of waveguide waves in the tunnels and the sizes of the cross sections of the tunnels during the traffic jam, which can effectively utilize the useful spaces of the tunnels. Thereby, the electrical waves in the underground space have minimum transmission loss, which reaches the purpose of the communication in the tunnels. The present invention has the advantages of passive relay work, low cost, less investment, simple circuit structure, easy manufacture and production, stable performance, convenient installation and maintenance, etc. and is particularly suitable for being used as passive relay communication devices in places, such as undergrounds, mines, the tunnels, underground parking areas, etc.
Description
Technical field
The present invention relates to a kind of underground space passive relay communication system in the communications field, be specially adapted to occasions such as subway, mine, tunnel, underground parking and make trunking traffic.
Background technology
In underground space radio communication, subway communication for example, mine communication, the underground parking, occasions such as tunnel, the communication equipment that generally use present home and abroad is that leaky cable adds active repeater, it is mainly by leaky cable, actively directly put, power-supply system and network management system are formed the active relaying communication system, this equipment has the following disadvantages: the one, invest too big, the price of leaking one kilometer on cable is about 100,000 yuan, the price that active repeater is one is about 150,000 yuan, with stop spacing is that two kilometers subways are example, its common configuration is four kilometers at least and leaks cable, four active repeaters, at least 100 ten thousand yuans.The 2nd, this method networking complexity, and to be equipped with a set of network administration systems, also want fund input.The 3rd, its management, maintenance difficult in some underground space, such as subway, can not enter repairing in vehicling operation, and carry out the night that can only be arranged in stoppage in transit, in order to guarantee to run without interruption, must consider backup, and this has strengthened the input of engineering again.
Summary of the invention
The objective of the invention is to avoid the weak point in the above-mentioned background technology and provide that a kind of passive work, cost are low, the underground space passive relay communication system of small investment, and the present invention also have circuit structure simple, make and produce easily, stable performance, be convenient to characteristics such as installation and maintenance.
The object of the present invention is achieved like this: it comprises the fixed communication base station, power is mixer along separate routes, low loss cable, the mobile communication base station, the 1st grade to the 5th grade fixing passive repeater, mobile passive repeater, wherein the fixed communication base station is connected with power shunt mixer by low loss cable, power mixer along separate routes carries out shunt or closes the road signal power, power along separate routes mixer by 5 road communication ports respectively by low loss cable and the 1st grade to the 5th grade fixedly passive repeater connect and compose program relay cascaded structure transmitt or receive signal, the mobile communication base station is connected with mobile passive repeater by low loss cable and receives or send signal of communication, and mobile passive repeater is by wireless transmission method and the 1st grade to the 5th grade fixedly passive repeater follow procedure relay cascaded structure received signal or transmission signal.
Every grade of the present invention fixedly passive repeater or mobile passive repeater includes mixer, the 1st to the No. 10 phase shifter, the 1st to the No. 10 exciter along separate routes, wherein mixer carries out shunt or closes the road transmitt or receive signal along separate routes, be connected with the 1st to the No. 10 phase shifter by cable respectively by 1 to 10 tunnel signalling channels, the the 1st to the No. 10 phase shifter is connected with the 1st to the No. 10 exciter by cable respectively after to the transmitt or receive signal phase shift, and the 1st to the No. 10 exciter sends or receiving communication signal with wireless transmission method.
The present invention fixedly the 1st to the No. 10 exciter of passive repeater is installed in respectively on left and right, the top wall of the underground space, and the 1st to the No. 10 exciter of mobile passive repeater is installed in respectively on left and right, the top casing of moving carriage-table.
The low-loss of the present invention fixedly excitation loss of passive repeater or mobile passive repeater is satisfied passive repeater field intensity coverage less than the coupling loss in the leaky cable system loss.
The present invention compares background technology and has following advantage:
1, the present invention fixedly passive repeater or mobile passive repeater adopt non-transformer work, installation and maintenance are convenient in so stable performance, but even the operation of fault-free freedom from repairs, do not need alternate device, reduced equipment amount and equipment investment.
2, cost price of the present invention is cheap, invests for a short time, does not need expensive leakage cable, does not need network management system, and therefore power-supply system can reduce cost greatly, and user's economy can be born.
3, the present invention fixes or existing active communication base station can be adopted in the mobile communication base station, so circuit structure is simple, makes and produces easily, and fixing or mobile passive repeater adopts ripe circuit block, is convenient to produce in batches, applies.
Description of drawings
Fig. 1 is an embodiment of the invention electricity principle calcspar.
Fig. 2 is the fixedly electric principle calcspar of passive repeater or mobile passive repeater of every grade of the present invention.
Among Fig. 1: 1 is that fixed communication base station, 2 is power mixer along separate routes, 3-2 to 3-5 be the 1st grade to the 5th grade fixedly passive repeater, 4 be low loss cable for mobile communication base station, 6 for mobile passive repeater, 5.
Among Fig. 2: 7 for mixer, 8-1 to 8-10 are that the 1 road to the No. 10 phase shifter, 9-1 to 9-10 are the 1 road to the No. 10 exciter along separate routes.
Embodiment
With reference to Fig. 1, Fig. 2, the present invention includes fixed communication base station 1, power mixer 2, fixedly passive repeater 3, mobile passive repeater 4, mobile communication base station 5, low loss cable 6 along separate routes.Embodiment the present invention presses Fig. 1 connection line.Fixed communication base station 1 and mobile communication base station 5 its effects are to send or receiving communication signal, embodiment is an example by railway tunnel communication, existing fixed communication base station on the platform is adopted in fixed communication base station 1, and existing mobile communication base station on the locomotive ride is adopted in mobile communication base station 5.Fixed communication base station 1 sends a signal to power mixer 2 along separate routes by low loss cable 6 transmission, or received power mixer 2 signal of communication after synthetic along separate routes.Power mixer 2 along separate routes becomes 5 road signals to be transferred to 5 grades of fixedly passive repeater 3-1 to 3-5 by low loss cable 6 respectively sending signal allocation.Or 5 grades fixedly synthetic one road signal of communication of received signal of passive repeater 3 transfer to fixed communication base station 1,5 grades of fixing passive repeater 3 configuration program relay cascaded structure formula transmitt or receive signals, its effect is in order further to extend fixedly passive repeater 3 field intensity coverages, to prolong the communication distance in the tunnel.It can be provided with the fixedly passive repeater 3 of different progression according to the length difference in tunnel embodiment.If the length in tunnel is no more than 2 kilometers, it can not pass through power division road mixer 2 with the fixing passive repeater 3 of one-level, directly finishes the transmitting-receiving communication process by low loss cable 6 and fixed communication base station 1.Mobile communication base station 5 directly is connected reception fixed communication base station 1 signal or reaches communication objective to fixed communication base station 1 transmission signal by low loss cable 6 with mobile passive repeater 4.
The loss of low loss cable 6 of the present invention is less than the loss of leaky cable system loss, guarantee fixing like this or mobile passive repeater 3 or 4 with fixing or mobile communication base station 1 or 5 between minimum loss is arranged, thereby can make them obtain the transmission signals of maximum.Embodiment adopts the enough little low loss cable of loss to satisfy passive relay and can communicate by letter, and low loss cable 6 adopts commercially available general low loss cable to make.
Every grade of the present invention fixedly passive repeater 3 or mobile passive repeater 4 it comprise mixer 7, No. 10 phase shifter 8-1 or 8-10, No. 10 exciter 9-1 to 9-10 along separate routes, Fig. 2 is their embodiment electricity principle calcspars, and presses Fig. 2 connection line.7 effects of shunt mixer are fixing or mobile communication base station 1 or 5 to be sent signals be divided into synthetic 1 road signal input of received signal fixing or mobile communication base station 1 or 5 that 1 to 10 road signals are transferred to 1 to 10 phase shifter 8-1 to 8-10 or 1 to No. 10 phase shifters 8 are imported.The effect of phase shifter 8 is transferred to No. 10 exciter 9-1 to 9-10 respectively after each road is sent the signal phase shift, or being transferred to mixer 7 along separate routes after the received signal phase shift of No. 10 exciters 9 again, signal after the phase shift can overcome the co-channel interference under the specified conditions, because homogenous frequency signal equates in amplitude, phase difference is 180 just to occur serious co-channel interference when spending, phase shifter 8 is spent through making the phase difference between them behind the phase modulation function each road homogenous frequency signal away from 180, avoided co-channel interference, embodiment mixer 7, phase shifter 8 along separate routes all adopts commercially available universal component to make.No. 10 exciter 9-1 to 9-10 effect is the received signal electromagnetic field to be converted to the signal of telecommunication, to input to that the corresponding phase shifter 8 in each road receives or each road phase shifter 8 is needed to send signal be converted to electromagnetic signal by each road exciter 9 and send.The excitation loss of exciter 9 of the present invention is less than the coupling loss in the leaky cable system loss, satisfy passive repeater field intensity coverage, embodiment exciter 9 adopts homemade plate aerial exciter to make, and makes its excitation loss enough little, satisfies the field intensity coverage.
Every grade of the present invention fixedly the 1st to the No. 10 exciter 9-1 to 9-10 of passive repeater 3 is installed in respectively on left and right, the top wall of the underground space (as the tunnel), the the 1st to the No. 10 exciter 9-1 to 9-10 of mobile passive repeater 4 is installed in respectively on left and right, the top casing of moving carriage-table, to guarantee to make full use of the usable reflection space, owing to be inversely proportional to the cross-sectional area in tunnel at the reflection loss of underground space space wave.The low exciter 9 of the general tunnel wall of embodiment is installed in overhead that distance is 2 meters, and higher exciter is installed in overhead and highly is 4 meters.And according to the size of the underground space, select exciter 9 to need the way of usefulness, select No. 3 exciters 9, No. 3 phase shifters can satisfy communicating requirement the underground space less (as the tunnel).
Mounting structure of the present invention is as follows: fixed communication base station 1 utilizes existing device to be installed on the platform, and mobile communication base station 5 utilizes existing device to be installed on the locomotive ride (or moving target).It is in 500 * 400 * 40 millimeters the mainframe box that shunt mixer 7, phase shifter 8 in fixing or mobile passive repeater 3 or 4 is installed in a size length * wide * height, be equipped with on the panel of mainframe box the cable socket that is connected with base station (or power division synthesizer) and with exciter 9 gang sockets.Fixedly the mainframe box of passive repeater 3 is installed in the tunnel, each road exciter 9 installs that tunnels are left and right, on the top wall, the mainframe box of mobile passive repeater 4 is installed on the locomotive, each road exciter 9 is installed in that the locomotive ride is left and right, on the railway carriage of top, press Fig. 1, Fig. 2 by the invention of low loss cable 6 link costs passive in communication system.
The concise and to the point operation principle of the present invention is as follows: when fixed communication base station 1 sender is posted a letter, through low loss cable 6, power along separate routes mixer 2 signal is transferred to fixedly passive repeater 3, fixedly passive repeater 3 is sent signal by exciter 9 after shunt, phase shift again.The signal that sends is received by the exciter in the mobile passive repeater 49, converts the signal of telecommunication to after phase shift, mixer closes behind the road by low loss cable 6, is transferred to mobile communication base station 5 and receives along separate routes.Process is posted a letter with the process of posting a letter of above-mentioned fixed communication base station 1 in mobile communication base station 5, and it is communication objective to reach the underground space.
Claims (4)
1, a kind of underground space passive relay communication system, it comprises fixed communication base station, power mixer, low loss cable along separate routes, the mobile communication base station, it is characterized in that also comprising the 1st grade to the 5th grade fixedly passive repeater, mobile passive repeater, wherein the fixed communication base station is connected with power shunt mixer by low loss cable, and power mixer along separate routes carries out shunt or closes the road signal power; Power along separate routes mixer by 5 road communication ports respectively by low loss cable with the 1st grade to the 5th grade fixedly passive repeater be connected to come configuration program relay cascaded structure transmitt or receive signal, the mobile communication base station is connected with mobile passive repeater by low loss cable and receives or send signal of communication, and mobile passive repeater is by the fixing passive repeater follow procedure relay cascaded structure received signal or send signal of wireless transmission method and the 1st grade to the 5th grade.
2, underground space passive relay communication system according to claim 1, fixedly passive repeater or mobile passive repeater include mixer along separate routes to it is characterized in that every grade, the the 1st to the No. 10 phase shifter, the the 1st to the No. 10 exciter, wherein mixer carries out shunt or closes the road transmitt or receive signal along separate routes, be connected with the 1st to the No. 10 phase shifter by cable respectively by 1 to 10 tunnel signalling channels, the the 1st to the No. 10 phase shifter is connected with the 1st to the No. 10 exciter by cable respectively after to the transmitt or receive signal phase shift, and the 1st to the No. 10 exciter sends or receiving communication signal with wireless transmission method.
3, underground space passive relay communication system according to claim 1 and 2, it is characterized in that every grade fixedly the 1st to the No. 10 exciter of passive repeater be installed in respectively on left and right, the top wall of the underground space, the 1st to the No. 10 exciter of mobile passive repeater is installed in respectively on left and right, the top casing of moving carriage-table.
4, underground space passive relay communication system according to claim 3, the excitation loss that it is characterized in that fixing passive repeater or mobile passive repeater satisfies passive repeater field intensity coverage less than the coupling loss in the leaky cable system loss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410012171 CN1282310C (en) | 2004-03-04 | 2004-03-04 | Underground space passive relay communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410012171 CN1282310C (en) | 2004-03-04 | 2004-03-04 | Underground space passive relay communication system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1561014A CN1561014A (en) | 2005-01-05 |
| CN1282310C true CN1282310C (en) | 2006-10-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200410012171 Expired - Fee Related CN1282310C (en) | 2004-03-04 | 2004-03-04 | Underground space passive relay communication system |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11177577B2 (en) * | 2017-02-21 | 2021-11-16 | 3M Innovative Properties Company | Passive repeater device, microwave network, and method of designing a repeater device |
| CN107425901B (en) * | 2017-04-21 | 2019-10-25 | 广东轻工职业技术学院 | A kind of mobile communication passive signal covering system and method |
| CN108566239A (en) * | 2018-04-27 | 2018-09-21 | 西南交通大学 | A kind of GSM-R Railway Mobile Radios System relays station and its application |
| GB2575241B (en) * | 2018-05-17 | 2023-02-01 | Swisscom Ag | A telecommunications system |
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Owner name: HEBEI FAR EAST COMMUNICATIONS SYSTEM ENGINEERING Free format text: FORMER OWNER: NO.54 INSTITUTE OF CHINA ELECTRONICS SCIENCE + TECHNOLOGY GROUP Effective date: 20081031 |
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Effective date of registration: 20081031 Address after: No 589, West Zhongshan Road, Shijiazhuang, Hebei: 050081 Co-patentee after: No.54 Inst., China Electronic Sci. & Tech. Group Co. Patentee after: Hebei Far East Communication System Engineering Co., Ltd. Address before: 54 computer companies, 589 West Zhongshan Road, Hebei, Shijiazhuang Province, China: 050081 Patentee before: No.54 Inst., China Electronic Sci. & Tech. Group Co. |
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Granted publication date: 20061025 Termination date: 20160304 |
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