CN210958812U - Train-ground wireless communication system and base station system thereof - Google Patents
Train-ground wireless communication system and base station system thereof Download PDFInfo
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- CN210958812U CN210958812U CN201921979860.9U CN201921979860U CN210958812U CN 210958812 U CN210958812 U CN 210958812U CN 201921979860 U CN201921979860 U CN 201921979860U CN 210958812 U CN210958812 U CN 210958812U
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Abstract
The utility model discloses a train-ground wireless communication system and a base station system thereof, which comprises a first base station system, a second base station system, a third base station system, a first vehicle-mounted transmitting and receiving system, a second vehicle-mounted transmitting and receiving system and a control center, wherein the control center is used for controlling the first vehicle-mounted transmitting and receiving system to be in electric communication with the second base station system according to the position of a train; or the second on-board transmit receive system is in electrical communication with a third base station system; or the first base station system is in electrical communication with either the first on-board transmit receive system or the second on-board transmit receive system. The first base station system comprises a base station, antennas and a power divider, wherein the antennas comprise two different types of antennas. According to the train communication method and the train communication system, different communication devices are arranged in different sections, the train is controlled to communicate with the corresponding communication device in each section, seamless connection of the train-ground wireless communication system among different communication modes is achieved, frequency bandwidth resources are effectively utilized, and cost is saved.
Description
Technical Field
The utility model belongs to the technical field of the car ground communication technique and specifically relates to a car ground wireless communication system and basic station system thereof is related to.
Background
At present, an LTE system has the characteristics of high bandwidth, high mobility, long-range coverage, high scalability, and the like, can solve the problems of instability, poor mobility, and the like of the existing wireless system, and is currently widely applied to a rail transit vehicle-ground wireless communication system. The LTE frequency band which can be used by division in the rail transit industry is 1.785 GHz-1.805 GHz. At present, the rail transit application environment is mainly divided into a tunnel, a ground and an overhead, the tunnel can be regarded as a closed space, external different network system interference is basically avoided, and an uplink line and a downlink line are divided into two tunnels, so that the uplink line and the downlink line are basically free of interference. The ground and the elevated section are both open spaces, the electromagnetic environment is worse, and the interference is easy to generate with the electric power, petroleum and other special networks which are also approved to adopt the 1.8GHz frequency band, so that the co-frequency interference of different networks is formed. Since the subway 1.8GHz dedicated frequency band is adjacent to the downlink frequency band of the China Mobile DCS1800 system and the uplink frequency band of the China telecom LTE FDD system, no guard band interval exists between the frequency bands, and the subway LTE train-ground wireless system and the related network of the operator may generate adjacent frequency interference.
The main media for wireless communication transmission of rail transit vehicles are free radio, leaky cable and leaky waveguide. Because the free wireless antenna and the leakage cable have certain advantages in cost and construction, for example, communication signals of the free wireless communication technology are transmitted in the air, the wireless communication technology is convenient and simple to arrange, the transmission distance is large, and the range is wide when the transmission antenna is used for transmitting signals. The leaky cable wireless communication technology is to propagate wireless signals by slotting a coaxial cable; the leakage cable radiates signals to the side, so that the leakage cable is easily interfered by the outside and simultaneously interferes the outside; the crack waveguide has the characteristics of low loss, interference resistance and uniform signal distribution, and has very weak influence on other systems.
Thus, generally free wireless and leaky cables are used more often, or a combination of both. The corresponding free wireless vehicle-mounted receiving antenna is generally arranged at the top of the train, the leakage cable is generally arranged at the side surface of the train, and the crack waveguide is arranged on the track bed. In a ground line and an overhead line section, as the vehicle-mounted receiving antenna of the free wireless and leakage cable is arranged at the position of the roof of the car, the external interference signal can be received more easily, and meanwhile, the interference can be caused to the external system, in order to reduce the same frequency interference of the external system, most rail transit owners can only select a frequency band of a certain frequency band within 1.785 GHz-1.805 GHz for use, but can not use all 20MHz, so that the waste of frequency resources is caused. In a more serious case, uplink and downlink lines of the system interfere with each other, and the communication quality is seriously affected.
Therefore, it is an urgent need to solve the above-mentioned problems by designing a train-ground wireless communication system to effectively utilize frequency bandwidth resources and improve system reliability.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a train ground wireless communication system and basic station system thereof to different external environment, sets up two kinds of communication mode in the system, according to communication mode's advantage, communication when corresponding different external environment respectively reaches the purpose of effectively utilizing the frequency bandwidth resource, improvement system reliability.
The above technical scheme of the utility model can be realized through following technical scheme to the purpose:
a base station system in a vehicle-ground wireless communication system comprises a base station, antennas and a power divider, wherein the antennas comprise two different types of antennas, the two different types of antennas comprise ground antennas and split waveguide antennas, or ground antennas and leaky cable antennas, the two different types of antennas are respectively connected with the power divider by feeders, and the power divider is electrically connected with the base station.
The utility model discloses further set up to: the ground antenna comprises a forward antenna and a backward antenna for extending transmission distance.
The above mentioned utility model discloses an above-mentioned utility model purpose still can realize through following technical scheme:
a train-ground wireless communication system is used for communication between a train and the ground and comprises a first base station system, a second base station system, a third base station system, a first vehicle-mounted transmitting and receiving system, a second vehicle-mounted transmitting and receiving system and a control center, wherein the control center is used for controlling the first vehicle-mounted transmitting and receiving system to be in electric communication with the second base station system according to the position of the train; or the second on-board transmit receive system is in electrical communication with a third base station system; or the first base station system is in electrical communication with either the first on-board transmit receive system or the second on-board transmit receive system.
The utility model discloses further set up to: the second base station system includes a ground-free wireless antenna system and the first on-board transmit receive system includes a ground-free wireless receive system.
The utility model discloses further set up to: the second base station system comprises a crack waveguide wireless system, and the second vehicle-mounted transmitting and receiving system comprises a crack waveguide wireless receiving system.
The utility model discloses further set up to: the second base station system comprises a leaky cable wireless system, and the second vehicle-mounted transmitting and receiving system comprises a leaky cable wireless receiving system.
The utility model discloses further set up to: the second base station system is arranged in the tunnel section, the first base station system is arranged near the tunnel exit, and the third base station system is arranged in the ground/overhead section.
The utility model discloses further set up to: the slot waveguide antenna and the backward antenna in the first base station system are positioned on one side of the third base station system, and the forward antenna is positioned on one side of the second base station system.
The utility model discloses further set up to: the control center comprises a control switch circuit which is used for controlling the first vehicle-mounted transmitting and receiving system or the second vehicle-mounted transmitting and receiving system to work.
Compared with the prior art, the utility model has the beneficial technical effects that:
1. according to the train-ground wireless communication system, aiming at the travelling sections in different external environments, two communication devices are arranged on the train-mounted system according to the advantages of various communication modes, and different communication modes are adopted for communication respectively, so that frequency bandwidth resources are effectively utilized, and the cost is saved;
2. furthermore, different communication devices are arranged in different sections, and the train is controlled to communicate with the corresponding communication device in each section, so that seamless connection of the train-ground wireless communication system among different communication modes is realized, and the reliability of the system is improved;
3. furthermore, the base station system with two communication modes is arranged, seamless connection of the train between different communication modes of two different sections is achieved, and reliable operation of the train-ground wireless communication system is guaranteed.
Drawings
Fig. 1 is a schematic structural diagram of a vehicle-ground wireless communication system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a base station system according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The utility model discloses a base station system among train ground wireless communication system, as shown in fig. 2, including the basic station, the ware 2 is divided to the merit, ground backward antenna 4, ground forward antenna 41, crack waveguide antenna 5, the merit divide ware 2 to pass through the feeder respectively with the basic station, ground backward antenna 4, ground forward antenna 41, crack waveguide antenna 5 is connected, a communication mode for through ground antenna, two different grade types of crack waveguide antenna communicates, wherein ground backward antenna 4, ground forward in antenna 41 forward, backward is relative speaking, its real front and back is corresponding with the direction that the train went ahead. The two antennas in opposite directions are arranged, so that the transmission distance can be prolonged, the number of base stations is reduced, and the cost is saved.
The base station systems are all arranged on the trackside ground, and the base stations are communication signal base stations.
The slot waveguide antenna 5 can also employ a leaky cable antenna.
The utility model discloses a train-ground wireless communication system, as shown in figure 1, including first base station system, second base station system, third base station system, first on-vehicle transmission and reception system, second on-vehicle transmission and reception system, control center is used for according to the position of train, controls first on-vehicle transmission and reception system and second base station system electric communication; or the second on-board transmit receive system is in electrical communication with a third base station system; or the first base station system is in electrical communication with either the first on-board transmit receive system or the second on-board transmit receive system.
Specifically, the first base station system is shown in fig. 2, and is not described again.
The second base station system comprises a base station 1, a power divider 2, a ground backward antenna 4 and a ground forward antenna, wherein the power divider 2 is connected with the ground backward antenna 4 through a feeder 3 and is respectively connected with the ground forward antenna and the base station 1 through feeders, and the second base station system is used for receiving and amplifying ground antenna signals and then transmitting the signals through the ground antennas. The power divider 2 is used for power division between antennas.
The second base station system comprises a base station, a power divider and a slot waveguide antenna 5, wherein the slot waveguide antenna also comprises a forward slot waveguide antenna and a backward slot waveguide antenna, and the purpose of the setting is to prolong the transmission distance of signals.
The second base station system is arranged in the tunnel section, the first base station system is arranged near the tunnel exit, and the third base station system is arranged in the ground/overhead section.
The slot waveguide antenna and the backward antenna in the first base station system are positioned on one side of the third base station system, and the forward antenna is positioned on one side of the second base station system. In this way, a ground antenna communication system is formed between the second base station system and the first base station system. A communication mode of a crack waveguide is formed between the third base station system and the first base station system, and the signals are completely linked between sections, so that the reliability of the signals in the running process of the train is ensured.
As shown in fig. 2, a first vehicle-mounted transmitting and receiving system and a second vehicle-mounted transmitting and receiving system are arranged on the train 6;
specifically, the first vehicle-mounted transmitting and receiving system comprises a vehicle-mounted receiving antenna 7, a vehicle-mounted wireless terminal 9 and a control center 10. The control center 10 is electrically connected with the vehicle-mounted receiving antenna 7 and the vehicle-mounted wireless terminal 9 respectively and is used for realizing communication with the ground antenna.
The vehicle-mounted receiving antenna 7 is a ground-based free antenna.
The second vehicle-mounted transmitting and receiving system comprises a crack waveguide receiving antenna 8, a vehicle-mounted wireless terminal 9 and a control center 10, wherein the control center 10 is electrically connected with the crack waveguide receiving antenna 8 and the vehicle-mounted wireless terminal 9 respectively and used for realizing communication with the crack waveguide antenna.
And the second base station system and the first vehicle-mounted transmitting and receiving system form ground free wireless communication. Accordingly, the third base station system and the second vehicle-mounted transmitting and receiving system form crack waveguide wireless communication. In the first base station system section, the control center controls the first vehicle-mounted transmitting and receiving system or the second vehicle-mounted transmitting and receiving system to work according to the external environment.
The control center comprises a control switch circuit. Between the first base station system section and the second base station system, the control center controls the first vehicle-mounted transmitting and receiving system to work; between the first base station system section and the third base station system, the control center controls the second vehicle-mounted transmitting and receiving system to enter into work.
In a specific embodiment of the present invention, the second base station system includes a leaky cable wireless system, and the second vehicle-mounted transceiver system includes a leaky cable wireless receiver system.
The implementation principle of the embodiment is as follows: because the tunnel section is a relatively closed area, a free wireless communication mode is adopted, the frequency bandwidth is fully utilized, two communication modes exist in the tunnel entrance section because the external environment is semi-closed and semi-open, the communication modes are switched, and the ground/overhead section is communicated by adopting a crack waveguide or leakage wireless communication mode.
According to the method and the device, different communication modes are adopted in different sections, the advantages of various communication modes are fully utilized, and the integrity and the reliability of communication are guaranteed in the whole operation process of the train.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (9)
1. A base station system in a vehicle-to-ground wireless communication system, characterized in that: the antenna comprises two different types of antennas, wherein the two different types of antennas comprise a ground antenna and a slot waveguide antenna or a ground antenna and a leaky cable antenna, the two different types of antennas are respectively connected with the power divider by adopting a feeder line, and the power divider is electrically connected with the base station.
2. The base station system in a train-ground wireless communication system according to claim 1, wherein: the ground antenna comprises a forward antenna and a backward antenna for extending transmission distance.
3. A train-ground wireless communication system for communication between a train and the ground, comprising: the system comprises a first base station system, a second base station system, a third base station system, a first vehicle-mounted transmitting and receiving system, a second vehicle-mounted transmitting and receiving system and a control center, wherein the control center is used for controlling the first vehicle-mounted transmitting and receiving system to be in electric communication with the second base station system according to the position of a train; or the second on-board transmit receive system is in electrical communication with a third base station system; or the first base station system is in electrical communication with either the first on-board transmit receive system or the second on-board transmit receive system; the base station system of claim 1 or 2 is applied to the first base station system, the second base station system and the third base station system.
4. The vehicle-to-ground wireless communication system according to claim 3, wherein: the second base station system includes a ground-free wireless antenna system and the first on-board transmit receive system includes a ground-free wireless receive system.
5. The vehicle-to-ground wireless communication system according to claim 3, wherein: the second base station system comprises a crack waveguide wireless system, and the second vehicle-mounted transmitting and receiving system comprises a crack waveguide wireless receiving system.
6. The vehicle-to-ground wireless communication system according to claim 3, wherein: the second base station system comprises a leaky cable wireless system, and the second vehicle-mounted transmitting and receiving system comprises a leaky cable wireless receiving system.
7. The vehicle-to-ground wireless communication system according to claim 3, wherein: the second base station system is arranged in the tunnel section, the first base station system is arranged near the tunnel exit, and the third base station system is arranged in the ground/overhead section.
8. The vehicle-to-ground wireless communication system according to claim 7, wherein: the slot waveguide antenna and the backward antenna in the first base station system are positioned on one side of the third base station system, and the forward antenna is positioned on one side of the second base station system.
9. The vehicle-to-ground wireless communication system according to claim 3, wherein: the control center comprises a control switch circuit which is used for controlling the first vehicle-mounted transmitting and receiving system or the second vehicle-mounted transmitting and receiving system to work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921979860.9U CN210958812U (en) | 2019-11-16 | 2019-11-16 | Train-ground wireless communication system and base station system thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921979860.9U CN210958812U (en) | 2019-11-16 | 2019-11-16 | Train-ground wireless communication system and base station system thereof |
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| CN210958812U true CN210958812U (en) | 2020-07-07 |
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| CN201921979860.9U Active CN210958812U (en) | 2019-11-16 | 2019-11-16 | Train-ground wireless communication system and base station system thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115913267A (en) * | 2023-01-04 | 2023-04-04 | 慧铁科技有限公司 | Vehicle-ground high-speed communication device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115913267A (en) * | 2023-01-04 | 2023-04-04 | 慧铁科技有限公司 | Vehicle-ground high-speed communication device |
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Effective date of registration: 20220526 Address after: 100035 No.2 Xizhimenwai street, Xicheng District, Beijing Patentee after: BEIJING SUBWAY OPERATION Corp. Address before: 100089 building 25, a 5, Deshengmenwai West Street, Haidian District, Beijing Patentee before: SUBWAY OPERATION TECHNOLOGY R & D CENTER, BEIJING SUBWAY OPERATION CO.,LTD. |