CN115550883A - Ultrahigh-speed low-vacuum pipeline vehicle-ground wireless communication interference suppression method - Google Patents
Ultrahigh-speed low-vacuum pipeline vehicle-ground wireless communication interference suppression method Download PDFInfo
- Publication number
- CN115550883A CN115550883A CN202110737669.9A CN202110737669A CN115550883A CN 115550883 A CN115550883 A CN 115550883A CN 202110737669 A CN202110737669 A CN 202110737669A CN 115550883 A CN115550883 A CN 115550883A
- Authority
- CN
- China
- Prior art keywords
- radio base
- base station
- train
- speed
- speed flying
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004891 communication Methods 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000001629 suppression Effects 0.000 title claims description 18
- 238000005192 partition Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 19
- 239000002184 metal Substances 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000002955 isolation Methods 0.000 description 3
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W4/44—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H]
Abstract
The invention provides a method for suppressing vehicle-ground wireless communication interference of an ultrahigh-speed low-vacuum pipeline, which comprises the following steps: acquiring the real-time position of a high-speed flying train; the central control system determines the only radio base station needing to be started and the rest radio base stations needing to be turned off corresponding to the current position of the high-speed flying train; each radio base station switches on or off a carrier radio frequency transmission channel; judging whether the high-speed flying train drives away from the coverage range of the only started radio base station, if so, controlling the next radio base station on the running route of the high-speed flying train to start a carrier radio frequency transmitting channel, and closing the carrier radio frequency transmitting channels of other radio base stations except the next radio base station; otherwise, returning to judge whether the high-speed flying train drives away from the coverage range of the corresponding radio base station. By applying the technical scheme of the invention, the technical problem that the vehicle-ground communication performance is reduced due to the existence of multipath interference signals in the ultra-high-speed low-vacuum pipeline in the prior art can be solved.
Description
Technical Field
The invention relates to the technical field of vehicle-ground wireless communication, in particular to a method for suppressing vehicle-ground wireless communication interference of an ultrahigh-speed low-vacuum pipeline.
Background
The ultra-high speed low vacuum pipeline high speed flying train is a new generation ground traffic tool which runs in a low vacuum metal closed pipeline and takes electromagnetic force as power, and the designed speed per hour can reach 1000km/h. The high-speed flying train is one of the important measures of the strategy of the strong country of transportation, the train-ground wireless communication is an important component of the high-speed flying train, and the safe operation of the flying train cannot be left in a stable and reliable train-ground wireless communication system. Therefore, the research on the vehicle-ground wireless communication technology facing the ultra-high speed scene in the metal pipeline is necessary and urgent, is a scientific and technological problem which needs to be solved urgently, and is one of the important factors for the success and failure of the strategy of the strong traffic country.
Because each communication cell of the ground base station equipment of the train-ground wireless communication system in the low-vacuum metal pipeline has limited coverage distance, in order to meet the long-distance coverage, a mode that the cells are taken as a unit and a plurality of cells are connected in front and back to form continuous coverage is generally adopted, and reliable data transmission is provided for train-ground data. However, due to the inherent characteristics of the metal material of the pipeline, electromagnetic wave signals can be reflected when encountering metal, and due to the narrow space in the pipeline, radio signals can be reflected for multiple times in the sealed metal pipeline, so that a complex multipath effect is generated. The multipath propagation of wireless signals in the pipe is shown in fig. 6.
Due to the high running speed of the train in the ultrahigh-speed low-vacuum metal pipeline, for a train-ground wireless communication system, a wireless channel faces a complex Doppler effect, and due to the metal characteristic of the inner wall of the pipeline, the number of times of reflection of a wireless signal is large, so that a complex multipath effect is formed. The doppler effect and the multipath effect cause a wireless channel to present a fast time-varying characteristic, which brings a serious challenge to channel estimation and channel equalization of a receiver of the train-ground wireless communication system, so that demodulation performance of the receiver of the communication system deteriorates to cause performance degradation of the communication system, and a transmission rate is significantly reduced.
The LTE-M (urban rail transit vehicle-ground integrated communication system) is a TD-LTE (Time Division Long Term) system designed for urban rail transit integrated service requirements, and can simultaneously bear information such as a communication-based train control system (CBTC), video monitoring (IMS), a Passenger Information System (PIS), train running state monitoring and the like.
The interference control technique proposed by 3GPP LTE (3 rd Generation Partnership Project LTE) mainly includes: inter-cell interference coordination (ICIC), inter-cell interference randomization, inter-cell interference cancellation, beam forming, and the like. The inter-cell interference coordination is also called as 'soft frequency reuse', frequency resources are divided into a plurality of reuse sets for vehicle-ground communication terminals located at different positions in a cell to use, and the frequency resources used by different terminals are not overlapped any more, so that the interference can be effectively reduced; interference randomization can be realized by scrambling, interleaving multiple access, frequency hopping and other modes to convert the interference into white noise; the inter-cell interference elimination can eliminate strong interference sources of some adjacent cells by a method for identifying adjacent cell interference, and has obvious effect of relieving the interference of a communication system; the beam forming is similar to the beam forming method of an intelligent antenna in TD-SCDMA (Time Division-synchronization Code Division Multiple Access), and the interference among partial cells is eliminated through the isolation of spatial orientation. Among these anti-interference technologies, inter-cell interference coordination (ICIC) is the most important and mature anti-interference technology in the industry at present.
The current inter-cell interference coordination (ICIC) technology mainly adopts a Soft Frequency Reuse (SFR) technology, for cell edge users, although the interference between adjacent cells is reduced, as only part of frequency resources are available, the data throughput of the edge users is greatly reduced, and although the wireless channel environment is improved, the cell throughput is sacrificed, and in the specific application process, a tradeoff needs to be made between the two.
In addition, the interference randomization interference reduction method mainly adopts scrambling, interleaving multiple access, frequency hopping and the like, is more suitable for working on a wider communication frequency band, and cannot reduce the energy of interference signals; the inter-cell interference elimination technology can only eliminate strong interference signals of some adjacent cells, and the interference in the actual communication system is mainly generated by overlapping a plurality of small interference signals and cannot be effectively eliminated; the beam forming adopts a space division multiplexing technology, and the purpose of interference suppression is realized by using a space isolation means, but the space isolation cannot be fully used for realizing space division multiplexing in the ultrahigh-speed low-vacuum pipeline due to narrow space, and the technology is not the optimal choice for the scene interference suppression of the ultrahigh-speed low-vacuum metal pipeline.
Disclosure of Invention
The invention provides a method for suppressing vehicle-ground wireless communication interference of an ultrahigh-speed low-vacuum pipeline, which can solve the technical problem that the vehicle-ground communication performance is reduced due to the existence of multipath interference signals in the ultrahigh-speed low-vacuum pipeline in the prior art.
The invention provides a ground wireless communication interference suppression method for an ultra-high-speed low-vacuum pipeline train, which comprises the following steps: the ground positioning device acquires the real-time position of the high-speed flying train and transmits the real-time position to the central control system; the central control system determines the only radio base station needing to be started and the rest radio base stations needing to be switched off corresponding to the current position of the high-speed flying train according to the real-time position of the high-speed flying train and the network position distribution of the radio base stations; the central control system transmits the on or off decision of each radio base station to the ground subarea radio control units, the ground subarea radio control units send carrier channel on or off commands to the corresponding radio base stations according to the on or off decision of each radio base station, and each radio base station opens or closes a carrier radio frequency transmitting channel according to the carrier channel on or off commands so that the high-speed flying train is only positioned in the coverage range of one radio base station at the current position; the central control system judges whether the high-speed flying train drives away from the coverage range of the only started radio base station according to the real-time position of the high-speed flying train, if so, the central control system controls the next radio base station on the running route of the high-speed flying train to start a carrier radio frequency transmitting channel through a ground subarea radio control unit, and closes the carrier radio frequency transmitting channels of the other radio base stations except the next radio base station until the high-speed flying train stops running so as to complete the interference suppression of the ultrahigh-speed low-vacuum pipeline train-ground wireless communication; otherwise, returning to judge whether the high-speed flying train drives away from the coverage range of the corresponding radio base station.
Furthermore, the ground positioning device comprises a laser coding real-time positioning device, the laser coding real-time positioning device comprises a positioning transmitting device and a positioning receiving device, the positioning transmitting device is located in the high-speed flying train and used for transmitting laser signals, and the positioning receiving device is located on the ground and used for receiving the laser signals.
Further, the central control system transmits the on or off decision of each radio base station to the ground partition radio control unit through the core network control unit of the vehicle-ground wireless communication system.
Furthermore, the central control unit comprises an intelligent decision module, the intelligent decision module acquires the signal coverage level of each radio base station by learning the coverage parameters of the radio base station network, and determines the on or off of each radio base station according to the real-time position of the high-speed flying train and the signal coverage level of each radio base station.
Further, the judgment criteria of the coverage area of the high-speed flying train driving away from the only opened radio base station are as follows: the intelligent decision module judges that the signal coverage level of the uniquely started radio base station corresponding to the real-time position of the high-speed flying train is smaller than the signal coverage level of the next radio base station on the running route of the high-speed flying train, and the difference between the two levels is larger than a preset threshold value.
The technical scheme of the invention is applied to provide an ultrahigh-speed low-vacuum pipeline vehicle-ground wireless communication interference suppression method, and the ultrahigh-speed low-vacuum pipeline vehicle-ground wireless communication interference suppression method adopts an intelligent means, reduces the multipath interference of a remote radio base station and the multipath interference in an ultrahigh-speed low-vacuum pipeline by turning off unnecessary carrier radio frequency transmission channels of the radio base station, ensures the channel quality of a wireless channel and does not lose the data transmission rate performance index of a communication system. Compared with the prior art, the technical scheme of the invention can solve the technical problem that the vehicle-ground communication performance is reduced due to the existence of multipath interference signals in the ultra-high-speed low-vacuum pipeline in the prior art.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a flow chart illustrating a method for suppressing ultra-high speed low vacuum pipeline train-ground wireless communication interference according to an embodiment of the present invention;
FIG. 2 illustrates a schematic structural diagram of a ground locating device provided in accordance with an exemplary embodiment of the present invention;
fig. 3 is a schematic diagram illustrating turning on or off of each radio base station in high-speed flying train operation according to an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating a decision principle of an intelligent decision module according to an embodiment of the present invention;
FIG. 5 is a graph illustrating data transmission rate comparison provided in accordance with a specific embodiment of the present invention;
fig. 6 shows a diagram of multipath signal interference in a pipeline in the prior art.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
As shown in fig. 1 to 5, according to an embodiment of the present invention, there is provided an ultra-high speed low vacuum pipeline vehicle-ground wireless communication interference suppression method, including: the ground positioning device acquires the real-time position of the high-speed flying train and transmits the real-time position to the central control system; the central control system determines the only radio base station needing to be started and the rest radio base stations needing to be switched off corresponding to the current position of the high-speed flying train according to the real-time position of the high-speed flying train and the network position distribution of the radio base stations; the central control system transmits the on or off decision of each radio base station to the ground subarea radio control units, the ground subarea radio control units send carrier channel on or off commands to the corresponding radio base stations according to the on or off decision of each radio base station, and each radio base station opens or closes a carrier radio frequency transmitting channel according to the carrier channel on or off commands so that the high-speed flying train is only positioned in the coverage range of one radio base station at the current position; the central control system judges whether the high-speed flying train drives away from the coverage range of the only started radio base station according to the real-time position of the high-speed flying train, if so, the central control system controls the next radio base station on the running route of the high-speed flying train to start a carrier radio frequency transmitting channel through a ground subarea radio control unit, and closes the carrier radio frequency transmitting channels of the other radio base stations except the next radio base station until the high-speed flying train stops running so as to complete the interference suppression of the ultrahigh-speed low-vacuum pipeline train-ground wireless communication; otherwise, returning to judge whether the high-speed flying train drives away from the coverage range of the corresponding radio base station.
By applying the configuration mode, the invention provides the ultrahigh-speed low-vacuum pipeline vehicle-ground wireless communication interference suppression method which adopts an intelligent means, reduces the multipath interference of a remote radio base station and the multipath interference in the ultrahigh-speed low-vacuum pipeline by turning off an unnecessary carrier radio frequency transmission channel of the radio base station, ensures the channel quality of a wireless channel and does not lose the data transmission rate performance index of a communication system. Compared with the prior art, the technical scheme of the invention can solve the technical problem that the vehicle-ground communication performance is reduced due to the existence of multipath interference signals in the ultra-high-speed low-vacuum pipeline in the prior art.
In the invention, in order to realize the interference suppression of the ultrahigh-speed low-vacuum pipeline train-ground wireless communication, firstly, a ground positioning device acquires the real-time position of a high-speed flying train and transmits the real-time position to a central control system. The high-speed flying train moves in the vacuum pipeline, the motion model of the high-speed flying train in the vacuum metal pipeline is determined, and the central control system can accurately calculate the specific position of the high-speed flying train in the pipeline according to the motion model of the high-speed flying train at any moment, so that the application of the subsequent carrier radio frequency channel intelligent turn-off technology is facilitated.
As an embodiment of the present invention, in order to accurately locate the position of the high-speed flying train at each moment, the ground locating device may be configured to include a laser coding real-time locating device, where the laser coding real-time locating device includes a locating transmitting device and a locating receiving device, the locating transmitting device is located in the high-speed flying train and is used to transmit a laser signal, and the locating receiving device is located on the ground and is used to receive the laser signal. Through the laser coding real-time positioning device, the central control system can position the high-speed flying train in real time, and the positioning precision is millimeter level, as shown in fig. 2.
In the invention, after the central control system acquires the real-time position of the high-speed flying train, the central control system determines the only radio base station to be started and the rest radio base stations to be switched off corresponding to the current position of the high-speed flying train according to the real-time position of the high-speed flying train and the distribution of the network positions of the radio base stations.
In the planning stage of the communication network, the positions of the radio base stations in the radio base station network are determined, and the coverage area of each radio base station is also determined, so that the only radio base station to be started corresponding to the current position of the high-speed flying train can be determined according to the real-time position of the high-speed flying train, and the high-speed flying train is in the coverage area of the only started radio base station at the current position.
In the invention, after determining the only radio base station needing to be started and the rest radio base stations needing to be shut off corresponding to the current position of the high-speed flying train, the central control system transmits the starting or shutting-off decision of each radio base station to the ground subarea radio control unit, the ground subarea radio control unit sends a carrier channel starting instruction or shutting-off instruction to the corresponding radio base station according to the starting or shutting-off decision of each radio base station, and each radio base station starts or shuts off a carrier radio frequency transmitting channel according to the carrier channel starting instruction or shutting-off instruction, so that the high-speed flying train is only positioned in the coverage range of one radio base station at the current position.
By applying the configuration mode, as shown in fig. 3, the high-speed flying train in the vacuum metal pipeline is only in the coverage range of one radio base station at any time, the radio base station is normally opened, the other radio base stations are closed, the multipath interference signals from a distant place can be minimized, the communication quality of a wireless channel is obviously enhanced, the data transmission rate of the train-ground wireless communication system is obviously improved, the performance is more stable and reliable, and the performance of the train-ground wireless communication system is ensured.
As an embodiment of the present invention, the central control system may transmit the on or off decision of each radio base station to the ground partition radio control unit through the core network control unit of the vehicle-ground wireless communication system.
In the invention, after each radio base station opens or closes the carrier radio frequency transmitting channel according to the carrier channel opening instruction or the closing instruction, the central control system judges whether the high-speed flying train drives away from the coverage range of the only opened radio base station according to the real-time position of the high-speed flying train, if so, the central control system controls the next radio base station on the running route of the high-speed flying train to open the carrier radio frequency transmitting channel through the ground subarea radio control unit, and closes the carrier radio frequency transmitting channels of the other radio base stations except the next radio base station until the high-speed flying train stops running to finish the ground radio communication interference suppression of the ultra-high-speed low-vacuum pipeline maglev system; otherwise, returning to judge whether the high-speed flying train drives away from the coverage range of the corresponding radio base station.
By applying the configuration mode, after the high-speed flying train leaves the coverage range of the currently and only opened radio base station, the central control system can make a decision in time to ensure that the train-ground wireless communication system is not interfered by remote multipath signals.
In order to ensure that the carrier radio frequency transmitting channel of the next radio base station can be smoothly opened after the high-speed flying train leaves the coverage range of the uniquely opened radio base station, the configurable central control unit comprises an intelligent decision module, after the communication network planning is finished, the intelligent decision module acquires the signal coverage level of each radio base station by learning the coverage parameters of the radio base station network, and determines the opening or closing of each radio base station according to the real-time position of the high-speed flying train and the signal coverage level of each radio base station. The intelligent decision module can ensure that the carrier radio frequency transmitting channel of the previous radio base station can be accurately closed and the carrier radio frequency transmitting channel of the next radio base station can be accurately opened.
As an embodiment of the present invention, the criterion for determining that a high-speed flying train leaves the coverage area of the only opened radio base station is as follows: the intelligent decision module judges that the signal coverage level of the uniquely started radio base station corresponding to the real-time position of the high-speed flying train is smaller than the signal coverage level of the next radio base station on the running route of the high-speed flying train, and the difference between the two levels is larger than a preset threshold value.
Specifically, as shown in fig. 4, before the high-speed flying train moves to point a, since the signal coverage level of the radio base station 1 which is currently and only turned on is higher, the difference between the signal coverage level of the radio base station 1 and the signal coverage level of the next radio base station 2 on the running route of the high-speed flying train is greater than a preset threshold, the carrier radio frequency transmission channel of the radio base station 1 is kept in an on state, and the carrier channel of the radio base station 2 is kept in an off dormant state; when the high-speed flying train runs between the point A and the point B, the absolute value of the difference between the wireless signal levels of the radio base stations 1 and 2 is smaller than a preset threshold value, the carrier radio frequency transmitting channel of the radio base station 1 is kept open, the carrier radio frequency transmitting channel of the radio base station 2 is in a standby state, and a starting instruction is ready to be received all the time; when the high-speed flying train runs to the position at or after the point B, because the signal coverage level of the radio base station 2 is higher than that of the radio base station 1, the difference between the signal coverage level of the radio base station 2 and the signal coverage level of the radio base station 1 is greater than a preset threshold value, the carrier radio frequency transmitting channel of the radio base station 2 is opened, and the carrier radio frequency transmitting channel of the radio base station 1 is closed. In the present invention, the preset threshold may be adjustably set according to a signal coverage level of the radio base station and a distance between the radio base stations.
In this embodiment, when the high-speed flying train runs between the point a and the point B, in order to prevent the radio base station 2 from receiving no opening command and affecting the radio signal coverage of the next train, a fixed time delay may be set after the radio base station 2 is opened, that is, within the fixed time delay, if the radio base station 2 does not receive the command for opening the carrier radio frequency transmission channel, the radio base station 2 autonomously opens the carrier radio frequency transmission channel.
The core idea of the method for suppressing the train-ground wireless communication interference of the ultrahigh-speed low-vacuum pipeline based on the intelligent turn-off of the carrier channel is that when a high-speed flying train flies at an ultrahigh speed in a closed metal low-vacuum pipeline, a ground positioning device can acquire the position of the high-speed flying train in real time and transmit the position to a central control system, the central control system judges which radio base station the current high-speed flying train is in, and sends out an instruction for turning off other radio base stations, and only signals of the radio base station covering the current high-speed flying train are reserved. When the high-speed flying train continues flying forwards, the radio base stations are switched on and off, the process is continuously repeated, and the high-speed flying train is only within the coverage range of one radio base station at any time so as to ensure that the interference degree of wireless signals is minimum.
As can be seen from the comparison of the data transmission rates of the train-ground wireless communication systems in table 1, when a high-speed flying train runs to the same position and the wireless interference suppression method of the present invention is not adopted, the train-ground wireless communication system is interfered to a certain extent due to the existence of numerous multipath interference components in the pipeline, so that the data transmission rate of the communication system is maintained at a lower level; after the wireless interference suppression method is adopted, the high-speed flying train is only covered under one radio base station, the radio frequency channel of the adjacent base station is intelligently closed, and the receiver of the communication system is not interfered by remote multipath signals any more, so that the data transmission rate of the train-ground wireless communication system is improved to a certain degree. Simulation data show that the data transmission rate is improved by 30% by adopting the wireless interference suppression method of the invention, and the effect is obvious, as shown in fig. 5.
TABLE 1 data transmission rate comparison table for train-ground wireless communication system
| Base station distance (m) | 100 | 200 | 300 | 400 | 500 |
| Closing function (Mbps) | 5.16 | 5.15 | 5.145 | 5.13 | 5.1 |
| Opening function (Mbps) | 6.81 | 6.74 | 6.72 | 6.67 | 6.61 |
| Rate boosting | 31.9％ | 30.8％ | 30.6％ | 30.0％ | 29.6％ |
In summary, the present invention provides a method for suppressing vehicle-ground wireless communication interference of an ultra-high speed low vacuum pipeline, which adopts an intelligent approach, reduces multipath interference of a remote radio base station and multipath interference in the ultra-high speed low vacuum pipeline by turning off an unnecessary carrier radio frequency transmission channel of the radio base station, and ensures channel quality of a wireless channel without losing data transmission rate performance indexes of a communication system. Compared with the prior art, the technical scheme of the invention can solve the technical problem that the vehicle-ground communication performance is reduced due to the multipath interference signals existing in the ultra-high-speed low-vacuum pipeline in the prior art.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
For ease of description, spatially relative terms such as "over 8230," "upper surface," "above," and the like may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; 'above" may include both orientations "at 8230; \8230;' above 8230; 'at 8230;' below 8230;" above ". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and unless otherwise stated, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. A method for suppressing vehicle-ground wireless communication interference of an ultrahigh-speed low-vacuum pipeline is characterized by comprising the following steps:
the ground positioning device acquires the real-time position of the high-speed flying train and transmits the real-time position to the central control system;
the central control system determines the only radio base station needing to be started and the rest radio base stations needing to be switched off corresponding to the current position of the high-speed flying train according to the real-time position of the high-speed flying train and the network position distribution of the radio base stations;
the central control system transmits the on or off decision of each radio base station to the ground subarea radio control units, the ground subarea radio control units send carrier channel on instructions or off instructions to the corresponding radio base stations according to the on or off decision of each radio base station, and each radio base station opens or turns off a carrier radio frequency transmitting channel according to the carrier channel on instructions or off instructions so that the high-speed flying train is only positioned in the coverage range of one radio base station at the current position;
the central control system judges whether the high-speed flying train drives away from the coverage range of the only started radio base station according to the real-time position of the high-speed flying train, if so, the central control system controls the next radio base station on the running route of the high-speed flying train to start a carrier radio frequency transmitting channel through the ground subarea radio control unit, and closes the carrier radio frequency transmitting channels of the other radio base stations except the next radio base station until the high-speed flying train stops running so as to complete the interference suppression of the ultra-high-speed low-vacuum pipeline train-ground wireless communication; otherwise, returning to judge whether the high-speed flying train drives away from the coverage range of the corresponding radio base station.
2. The method for suppressing the interference of ultra-high-speed low-vacuum pipeline train-ground wireless communication according to claim 1, wherein the ground positioning device comprises a laser coding real-time positioning device, the laser coding real-time positioning device comprises a positioning transmitting device and a positioning receiving device, the positioning transmitting device is located in the high-speed flying train and used for transmitting laser signals, and the positioning receiving device is located on the ground and used for receiving the laser signals.
3. The ultra-high-speed low-vacuum pipeline vehicle-ground wireless communication interference suppression method according to claim 1 or 2, wherein the central control system transmits the on or off decision of each radio base station to the ground partition radio control unit through a vehicle-ground wireless communication system core network control unit.
4. The method for suppressing interference of ultra-high speed low vacuum pipeline train-ground wireless communication according to any one of claims 1 to 3, wherein the central control unit comprises an intelligent decision module, the intelligent decision module obtains signal coverage levels of each radio base station by learning coverage parameters of a radio base station network, and determines the on or off of each radio base station according to the real-time position of the high speed flying train and the signal coverage levels of each radio base station.
5. The method for suppressing the interference of ultra-high-speed low-vacuum pipeline train-ground wireless communication according to claim 4, wherein the criterion for judging that a high-speed flying train leaves the coverage area of the only opened radio base station is as follows: the intelligent decision module judges that the signal coverage level of the only started radio base station corresponding to the real-time position of the high-speed flying train is smaller than the signal coverage level of the next radio base station on the running route of the high-speed flying train, and the difference between the two levels is larger than a preset threshold value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110737669.9A CN115550883A (en) | 2021-06-30 | 2021-06-30 | Ultrahigh-speed low-vacuum pipeline vehicle-ground wireless communication interference suppression method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110737669.9A CN115550883A (en) | 2021-06-30 | 2021-06-30 | Ultrahigh-speed low-vacuum pipeline vehicle-ground wireless communication interference suppression method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115550883A true CN115550883A (en) | 2022-12-30 |
Family
ID=84705742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110737669.9A Pending CN115550883A (en) | 2021-06-30 | 2021-06-30 | Ultrahigh-speed low-vacuum pipeline vehicle-ground wireless communication interference suppression method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115550883A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040058678A1 (en) * | 2002-09-23 | 2004-03-25 | Detorbal Rene Fernand Emile | Method and apparatus for facilitating handovers for a group of mobile radios |
| JP2011114837A (en) * | 2009-11-30 | 2011-06-09 | Mitsubishi Electric Corp | Train radio system and train radio ground base station |
| CN103582091A (en) * | 2012-08-07 | 2014-02-12 | 中国移动通信集团公司 | Method and device for base station energy-saving operation in high-speed rail private network |
| CN111381237A (en) * | 2018-12-28 | 2020-07-07 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | Pipeline train positioning method and system based on laser reflection |
| CN112286045A (en) * | 2020-10-15 | 2021-01-29 | 天津津航计算技术研究所 | Start-stop control system for high-speed train with vacuum metal pipeline |
| WO2021036907A1 (en) * | 2019-08-30 | 2021-03-04 | 比亚迪股份有限公司 | Train control system and train control method |
-
2021
- 2021-06-30 CN CN202110737669.9A patent/CN115550883A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040058678A1 (en) * | 2002-09-23 | 2004-03-25 | Detorbal Rene Fernand Emile | Method and apparatus for facilitating handovers for a group of mobile radios |
| JP2011114837A (en) * | 2009-11-30 | 2011-06-09 | Mitsubishi Electric Corp | Train radio system and train radio ground base station |
| CN103582091A (en) * | 2012-08-07 | 2014-02-12 | 中国移动通信集团公司 | Method and device for base station energy-saving operation in high-speed rail private network |
| CN111381237A (en) * | 2018-12-28 | 2020-07-07 | 中国航天科工飞航技术研究院（中国航天海鹰机电技术研究院） | Pipeline train positioning method and system based on laser reflection |
| WO2021036907A1 (en) * | 2019-08-30 | 2021-03-04 | 比亚迪股份有限公司 | Train control system and train control method |
| CN112286045A (en) * | 2020-10-15 | 2021-01-29 | 天津津航计算技术研究所 | Start-stop control system for high-speed train with vacuum metal pipeline |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109347525A (en) | The self-adaptive multiple-beam of millimeter wave high-speed rail train-ground communication shapes and beam switching method | |
| US6792276B1 (en) | Hot spot with tailored range for extra frequency to minimize interference | |
| EP1733583B1 (en) | Mobile communications in a hierarchical cell structure | |
| US5577047A (en) | System and method for providing macrodiversity TDMA radio communications | |
| CN103442362B (en) | Communication device and method for interference coordination and energy conservation with same adopted | |
| CN106341821B (en) | LTE-based rail transit wireless data interference suppression method and system | |
| CN104796918A (en) | Wireless communication networking method | |
| US6301478B1 (en) | Intra cell handover and channel allocation to reduce interference | |
| CN104113897B (en) | A kind of cell energy-saving compensation coordination approach and equipment | |
| CN102316472B (en) | Vehicle access method based on long term evolution (LTE) and system thereof | |
| EP3342064B1 (en) | Power control in high speed scenario | |
| CN103516637A (en) | Downlink communication method in high speed railway system and device thereof | |
| CN102123470B (en) | Circuit switched domain based system and method for transmitting GSM-R (Global System for Mobile Communication-Railway) train control data in real time | |
| CN104717303A (en) | Three-module automatic switch signal transmitting center of high-speed train | |
| CN104735730A (en) | Switchover optimization method suitable for target base station in heterogeneous network | |
| CN202261813U (en) | Vehicle-mounted access system based on long term evolution (LTE) | |
| CN115550883A (en) | Ultrahigh-speed low-vacuum pipeline vehicle-ground wireless communication interference suppression method | |
| Chae et al. | A novel handover scheme in moving vehicular femtocell networks | |
| TW201421925A (en) | Method and apparatus for interference suppression in radio-over-fiber communication systems | |
| CN104902566B (en) | In a kind of high-iron carriage under wireless aps redundant configuration terminal device mobile location method and system | |
| CN112671500A (en) | Same frequency interference suppression method and corresponding communication terminal | |
| Ren et al. | A robust inter beam handover scheme for 5G mmWave mobile communication system in HSR scenario | |
| CN103096450A (en) | Power control method under high-speed moving scene | |
| CN109327875A (en) | A kind of transmission method technical field of the wireless communication transmissions device based on 4G module | |
| CN112788563B (en) | Communication mode selection and resource allocation method in rail transit vehicle-to-vehicle communication |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |