CN116022201A - Train control wireless communication system and method using PIS channel as redundancy - Google Patents
Train control wireless communication system and method using PIS channel as redundancy Download PDFInfo
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Abstract
The invention discloses a train control wireless communication system and a train control wireless communication method using a PIS channel as redundancy, wherein the system comprises an LTE train ground wireless transmission system and a PIS train ground wireless transmission system, a track side operation control system and a vehicle-mounted operation control system carry out real-time interaction of data through the LTE wireless channel and the PIS wireless channel, and the transmitted data can adopt a first-come first-use processing logic or a multi-channel data checking and verification processing mode. Because the technical characteristics and the wireless frequency point resources adopted by the wireless communication of the PIS system are different from those of the existing LTE technical system, the common-frequency interference probability of the whole system is reduced; meanwhile, the redundancy of the ground wireless communication channel is increased, the overall stability and reliability of the wireless system are improved, and the line operation service level is improved.
Description
Technical Field
The invention belongs to the technical field of rail transit train control wireless communication, and particularly relates to a train control wireless communication system and method using a PIS channel as redundancy.
Background
In the technical field of full-automatic operation of urban rail transit trains, a train operation control system is a key core system for guaranteeing the safety and efficiency of train operation. The main train operation control systems at the present stage are all communication-based train control systems, namely CBTC systems; on the other hand, with the continuous development of communication technology, the train-ground wireless data transmission of the operation control system adopts a wireless communication (Radio) mode, and then the train operation control system is called CBTC-R. The vehicle-mounted operation control subsystem and the trackside operation control system in the train operation control system need to realize real-time data interaction through wireless data transmission, so that the safety and the efficiency of train operation are ensured.
According to the definition of the International public transportation Consortium (UITP), the automatic train operation class is classified into GoA0, goA 1-GoA 4, 5 stages, and when the train operation is in GoA3 or GoA4, the automatic train operation class can be generally called full automatic train operation. The full-automatic operation of the train is realized by improving the redundancy of an operation control system, for example, an ATP system and an interlocking system which relate to driving safety generally adopt a redundancy architecture of 2 times 2 taking 2 and 3 taking 2, and even a redundancy architecture scheme of two sets of 2 times 2 taking 2 or two sets of 3 taking 2 is adopted on a core system of partial engineering, so that the reliability and the usability of the system are further improved.
Currently, the vehicle-ground wireless communication of the CBTC-R system generally adopts an LTE-M single technology system, and meanwhile, partial frequency resources (generally only 10 MHz) in 1785 MHz-1805 MHz (total 20 MHz) frequency band resources approved by the radio management committee are utilized. The LTE train-ground wireless communication system of the CBTC-R operation control system generally adopts a double-network hot standby redundant architecture, a wireless transmission medium adopts a coaxial leaky cable, and the architecture scheme of the wireless communication system can basically meet the requirements of a GoA3 or GoA 4-level train full-automatic operation scene.
However, the LTE devices are all common commercial products, and their own product structure is not a safety redundancy structure, even if a configuration scheme of dual-network redundancy is adopted, the average failure interval MTBF of the LTE wireless portion is ≡5×10 4 h is less than 10 of the MTBF of other safety related subsystems of the signal 5 h-level requirements. Along with the lengthening of engineering application years, the fault rate of LTE equipment also rises, so that the stability and reliability of a full-automatic operation system are reduced; on the other hand, the urban rail transit has fewer radio frequency resources, and once malicious specific frequency interference, temporary frequency interference or other rail coaxial leakage cable faults occur, the train-ground wireless communication is interrupted, the train is braked emergently, and the normal operation is interrupted; and the full-automatic train operation system of the GoA3 or GoA4 level is generally not provided with a full-time driver, so that once the fault occurs, the train is recovered to be operated for a long time, thereby leading to large-area late time and passengers to stay in the train or at a station, and causing adverse social influence.
Moreover, the existing single-mode LTE wireless network scheme does not carry out information verification, and the security of network data under extreme conditions is not guaranteed.
Disclosure of Invention
The present invention is directed to overcoming at least one of the deficiencies of the prior art and providing a system and method for column-controlled wireless communication utilizing PIS channels as redundancy.
The technical scheme of the invention is realized as follows: the invention discloses a train control wireless communication system utilizing a PIS channel as redundancy, which comprises an LTE train ground wireless transmission system and a PIS train ground wireless transmission system, wherein the LTE train ground wireless transmission system is positioned between a train carrying control system and a track side carrying control system and is used for realizing real-time data interaction between the train carrying control system and the track side carrying control system, the PIS train ground wireless transmission system is positioned between the train carrying control system and the track side carrying control system and is used for realizing real-time data interaction between the train carrying control system and the track side carrying control system, the PIS train ground wireless transmission system comprises a passenger information system, a PIS wireless transmission medium, a PIS vehicle-mounted wireless antenna and PIS vehicle-mounted wireless equipment, the passenger information system is connected with the track side carrying control system, the passenger information system is connected with the PIS wireless transmission medium, and the PIS vehicle-mounted wireless antenna is connected with the PIS vehicle-mounted wireless equipment through a vehicle-mounted network switch.
The PIS wireless transmission medium is used for realizing the transmission and the reception of wireless data of the PIS system, and the PIS vehicle-mounted wireless antenna is used for realizing the transmission and the reception of the wireless data of the PIS system.
Further, an information safety protection device is arranged between the passenger information system and the trackside operation control system.
Further, the PIS vehicle-mounted wireless equipment is connected with vehicle-mounted information safety protection equipment, and the vehicle-mounted information safety protection equipment is connected with a vehicle-mounted operation control system through a vehicle-mounted network switch.
Further, the LTE train-ground wireless transmission system comprises LTE network equipment, an LTE wireless transmission medium, an LTE vehicle-mounted wireless antenna and an LTE vehicle-mounted wireless access unit, wherein the LTE vehicle-mounted wireless antenna and the LTE vehicle-mounted wireless access unit are installed on a train, the LTE network equipment is connected with the trackside operation control system and the LTE wireless transmission medium, the LTE wireless transmission medium is used for realizing transmission and reception of LTE wireless data, the LTE vehicle-mounted wireless antenna is connected with the LTE vehicle-mounted wireless access unit, and the LTE vehicle-mounted wireless access unit is connected with the vehicle-mounted operation control system through a vehicle-mounted network switch.
Further, a first program is preset in the vehicle-mounted operation control system, so that when the vehicle-mounted operation control system receives first data transmitted by the track-side operation control system through the LTE vehicle-to-ground wireless transmission system and the PIS vehicle-to-ground wireless transmission system, a first data processing step or a second data processing step is executed; the first data information comprises check data, a time stamp, train operation control information and equipment state information;
A first data processing step comprising: analyzing and checking first data information when the vehicle-mounted transportation control system receives the first data information, when the first data information is accurate, acquiring the first data information as effective data information of a current period, when the vehicle-mounted transportation control system receives the next first data information each time, analyzing the first data information, judging whether the first data information and the first data information of the current acquisition belong to data sent by a track side transportation control system of the same period or not, if yes, ignoring the first data information, if not, checking the first data information, and when the first data information is accurate, acquiring the first data information as effective data information of the next period;
a second data processing step comprising: the vehicle-mounted operation control system receives first data information in real time, when the vehicle-mounted operation control system receives at least two paths of first data information in a set time range T1, all the received first data information is analyzed, the first data information is checked, if the condition that at least two paths of first data information in the received multiple paths of first data are identical in content is met, the vehicle-mounted operation control system adopts the identical first data information as effective data information in a current period, and if the condition that at least two paths of first data information in the received multiple paths of first data are identical in content cannot be met, the vehicle-mounted operation control system confirms that the first data information in the current period is unreliable and enters the next period; if the situation that at least two paths of first data information are identical cannot be checked in N periods continuously occurs, the vehicle-mounted operation control system confirms that the wireless network is interfered or fails, and the vehicle-mounted operation control system alarms the failure and controls the train to stop in emergency braking.
Further, a second program is preset in the track side operation control system, so that when the track side operation control system receives second data transmitted by the vehicle-carrying control system through the LTE vehicle-to-ground wireless transmission system and the PIS vehicle-to-ground wireless transmission system, a third data processing step or a fourth data processing step is executed; the second data information comprises check data, a time stamp, trackside operation control information and equipment state information;
a third data processing step comprising: analyzing and checking the second data information when the trackside operation control system receives the first second data information, adopting the second data information as effective data information of the current period when the second data information is accurate, analyzing the second data information when the trackside operation control system receives the next second data information each time, judging whether the second data information and the second data information which is currently adopted belong to data sent by the same period vehicle operation control system, if yes, ignoring the second data information, if not, checking the second data information, and adopting the second data information as effective data information of the next period when the second data information is accurate;
a fourth data processing step comprising: the track side operation control system receives second data information in real time, when the track side operation control system receives at least two paths of second data information in a set time range T2, all the received second data information is analyzed, the second data information is checked, if the condition that at least two paths of second data information in the received multiple paths of second data are identical in content is met, the track side operation control system adopts the identical second data information as effective data information in the current period, and if the condition that at least two paths of second data information in the received multiple paths of second data are identical in content cannot be met, the track side operation control system confirms that the second data information in the current period is not authentic, and the next period is entered.
Further, if at least two paths of second data information cannot be checked to be the same in N periods continuously, the trackside operation control system confirms that the wireless network is interfered or has a fault, and the trackside operation control system carries out fault alarm and controls the related train to take emergency measures.
The invention also discloses a column control wireless communication method using the PIS channel as redundancy, which comprises the following steps:
an LTE train-ground wireless transmission system and a PIS train-ground wireless transmission system are respectively arranged between the vehicle-mounted operation control system and the trackside operation control system;
real-time data interaction is carried out between the vehicle carrying control system and the trackside carrying control system through an LTE vehicle-ground wireless transmission system;
real-time data interaction is carried out between the vehicle carrying control system and the trackside carrying control system through a PIS vehicle-ground wireless transmission system;
the track side operation control system sends first data to the vehicle-mounted operation control system at intervals of set time, wherein the first data information comprises check data, a time stamp, train operation control information and equipment state information, and the vehicle-mounted operation control system receives the first data information and executes a first data processing step or a second data processing step;
a first data processing step comprising: analyzing and checking first data information when the vehicle-mounted transportation control system receives the first data information, when the first data information is accurate, acquiring the first data information as effective data information of a current period, when the vehicle-mounted transportation control system receives the next first data information each time, analyzing the first data information, judging whether the first data information and the first data information of the current acquisition belong to data sent by a track side transportation control system of the same period or not, if yes, ignoring the first data information, if not, checking the first data information, and when the first data information is accurate, acquiring the first data information as effective data information of the next period;
A second data processing step comprising: the vehicle-mounted operation control system receives first data information in real time, when the vehicle-mounted operation control system receives at least two paths of first data information in a set time range T1, all the received first data information is analyzed, the first data information is checked, if the condition that at least two paths of first data information in the received multiple paths of first data are identical in content is met, the vehicle-mounted operation control system adopts the identical first data information as effective data information in a current period, and if the condition that at least two paths of first data information in the received multiple paths of first data are identical in content cannot be met, the vehicle-mounted operation control system confirms that the first data information in the current period is unreliable and enters the next period.
Further, if at least two paths of first data information cannot be checked to be the same in N periods continuously, the vehicle-mounted operation control system confirms that the wireless network is interfered or fails, and the vehicle-mounted operation control system alarms the failure and controls the emergency braking and stopping of the train.
Further, when the vehicle-mounted operation control system does not receive any first data information or only receives one path of first data information within the set time range T1, the vehicle-mounted operation control system confirms that the wireless network is interfered or fails, and the vehicle-mounted operation control system alarms in a failure mode and controls the train to stop in an emergency braking mode.
Further, the vehicle-mounted operation control system sends second data to the track side operation control system at intervals of set time, the second data information comprises check data, a time stamp, track side operation control information, equipment state information and the like, and the track side operation control system receives the second data information and executes a third data processing step or a fourth data processing step;
a third data processing step comprising: analyzing and checking the second data information when the trackside operation control system receives the first second data information, adopting the second data information as effective data information of the current period when the second data information is accurate, analyzing the second data information when the trackside operation control system receives the next second data information each time, judging whether the second data information and the second data information which is currently adopted belong to data sent by the same period vehicle operation control system, if yes, ignoring the second data information, if not, checking the second data information, and adopting the second data information as effective data information of the next period when the second data information is accurate;
a fourth data processing step comprising: the track side operation control system receives second data information in real time, when the track side operation control system receives at least two paths of second data information in a set time range T2, analyzing all the received second data information, checking the second data information, if the condition that at least two paths of second data information in the received multiple paths of second data are identical in content is met, the track side operation control system adopts the identical second data information as effective data information in the current period, and if the condition that at least two paths of second data information in the received multiple paths of second data are identical in content cannot be met, the track side operation control system confirms that the second data information in the current period is not authentic, and then the next period is entered; if the condition that at least two paths of second data information are checked to be the same cannot occur in N periods continuously, the trackside operation control system confirms that the wireless network is interfered or fails, the trackside operation control system alarms the failure, and the related train is controlled to take emergency measures.
Further, the vehicle-mounted operation control system receives instruction information of a user, when the vehicle-mounted operation control system receives first instruction information of the user, the vehicle-mounted operation control system executes a first data processing step, and when the vehicle-mounted operation control system receives second instruction information of the user, the vehicle-mounted operation control system executes a second data processing step.
Further, the first area and the second area are divided in advance, when the train is located in the first area, the vehicle-mounted operation control system executes the first data processing step, and when the train is located in the second area, the vehicle-mounted operation control system executes the second data processing step.
Further, interference detection is performed, when the measured interference amount is smaller than or equal to a set threshold value, the vehicle-mounted operation control system executes a first data processing step, and when the measured interference amount is larger than the set threshold value, the vehicle-mounted operation control system executes a second data processing step.
The invention has at least the following beneficial effects:
at present, the industry has a single-mode LTE wireless network scheme, the reliability and the stability of the system are relatively weak, and the failure of LTE wireless network core equipment, or the failure of a trackside wireless transmission medium, or the occurrence of frequency interference can cause emergency braking and stopping of a train, so that the normal operation of the train is interrupted; particularly in a full-automatic operation system, a full-time driver is not configured on a train, so that the train ground wireless communication is failed, the operation speed of the train is recovered to be slower, and the operation service quality is reduced.
Compared with the existing scheme, the invention provides a column control wireless communication scheme which uses PIS channels as redundancy. The track side operation control system and the vehicle-mounted operation control system can carry out real-time interaction of data through two wireless channels of LTE and PIS, and the data transmission can adopt a first-come first-use processing logic or a multi-channel data checking and verification processing mode. Because the technical characteristics and the wireless frequency point resources adopted by the wireless communication of the PIS system are different from those of the existing LTE technical system, the common-frequency interference probability of the whole system is reduced; meanwhile, the redundancy of the ground wireless communication channel is increased, the overall stability and reliability of the wireless system are improved, and the line operation service level is improved.
And because the invention adopts the processing scheme of multipath information verification, the safety of network data under extreme conditions can be improved, and the driving safety is ensured.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of an architecture of a train control wireless communication system using PIS channels as redundancy according to an embodiment of the present invention;
fig. 2 is a data flow diagram of a train control wireless communication system using PIS channels as redundancy according to an embodiment of the present invention.
In the drawing, 1 is a trackside operation control system, 2 is LTE network equipment, 3 is an LTE wireless transmission medium, 4 is an LTE vehicle-mounted wireless antenna, 5 is an LTE vehicle-mounted wireless access unit, 6 is a vehicle-mounted network switch, 7 is a vehicle-mounted operation control system, 8 is information safety protection equipment, 9 is a passenger information system, 10 is a PIS wireless transmission medium, 11 is a PIS vehicle-mounted wireless antenna, 12 is a PIS vehicle-mounted wireless equipment, and 13 is vehicle-mounted information safety protection equipment.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second" may include one or more such features, either explicitly or implicitly; in the description of the present invention, unless otherwise indicated, the meaning of "a plurality", "a number" or "a plurality" is two or more.
Example 1
Referring to fig. 1, an embodiment of the present invention provides a train control wireless communication system using a PIS channel as redundancy, including an LTE train ground wireless transmission system and a PIS train ground wireless transmission system, where the LTE train ground wireless transmission system is located between a train carrying control system 7 and a track side carrying control system 1, for implementing real-time data interaction between the train carrying control system 7 and the track side carrying control system 1, the PIS train ground wireless transmission system is located between the train carrying control system 7 and the track side carrying control system 1, for implementing real-time data interaction between the train carrying control system 7 and the track side carrying control system 1, the PIS train ground wireless transmission system includes a passenger information system 9, a PIS wireless transmission medium 10, and a PIS vehicle-mounted wireless antenna 11 and a PIS vehicle-mounted wireless device 12 mounted on a train, where the passenger information system 9 is connected to the track side carrying control system 1, the passenger information system 9 is connected to the PIS wireless transmission medium 10, the PIS vehicle-mounted wireless antenna 11 is connected to the PIS vehicle-mounted wireless device 12, and the PIS vehicle-mounted wireless device 12 is connected to the train-mounted wireless device 7 via the train carrying control system 6.
The PIS wireless transmission medium 10 is used for sending and receiving wireless data of a PIS system, and the PIS vehicle-mounted wireless antenna 11 is used for sending and receiving wireless data of the PIS system.
Further, an information safety protection device 8 is arranged between the passenger information system 9 and the trackside operation control system 1.
Further, the PIS in-vehicle wireless device 12 is connected to an in-vehicle information security device 13, and the in-vehicle information security device 13 is connected to the in-vehicle operation control system 7 via the in-vehicle network switch 6.
Further, the LTE train-ground wireless transmission system includes an LTE network device 2, an LTE wireless transmission medium 3, and an LTE vehicle-mounted wireless antenna 4 and an LTE vehicle-mounted wireless access unit 5 mounted on a train, where the LTE network device 2 is connected with the trackside operation control system 1 and the LTE wireless transmission medium 3, the LTE wireless transmission medium 3 is used for implementing transmission and reception of LTE wireless data, the LTE vehicle-mounted wireless antenna 4 is connected with the LTE vehicle-mounted wireless access unit 5, and the LTE vehicle-mounted wireless access unit 5 is connected with the vehicle-mounted operation control system 7 through a vehicle-mounted network switch 6.
Further, a first program is preset in the vehicle-mounted operation control system 7, so that when the vehicle-mounted operation control system 7 receives first data transmitted by the track-side operation control system 1 through the LTE vehicle-to-ground wireless transmission system and the PIS vehicle-to-ground wireless transmission system, a first data processing step or a second data processing step is executed; the first data information comprises check data, a time stamp, train operation control information, equipment state information and the like;
A first data processing step comprising: analyzing and checking the first data information when the vehicle-mounted control system 7 receives the first data information, when the first data information is accurate, acquiring the first data information as effective data information of the current period, when the vehicle-mounted control system 7 receives the next first data information each time, analyzing the first data information, judging whether the first data information and the first data information of the current acquisition belong to data sent by the track side control system 1 of the same period, if yes, ignoring the first data information, if not, checking the first data information, and when the first data information is accurate, acquiring the first data information as effective data information of the next period;
a second data processing step comprising: the vehicle-mounted operation control system 7 receives first data information in real time, when the vehicle-mounted operation control system 7 receives at least two paths of first data information in a set time range T1 (T1 is set according to requirements), all the received first data information is analyzed, the first data information is checked, if the fact that at least two paths of first data information in multiple paths of received first data are identical in content is met, the vehicle-mounted operation control system 7 adopts the identical first data information as effective data information in a current period, if the fact that at least two paths of first data information in multiple paths of received first data are identical in content cannot be met, the vehicle-mounted operation control system 7 confirms that the first data information in the current period is unreliable, and the next period is entered; if the situation that at least two paths of first data information are identical cannot be checked in N periods continuously occurs, the vehicle-mounted operation control system 7 confirms that the wireless network is interfered or fails, the vehicle-mounted operation control system 7 alarms in a failure mode, and the train is controlled to stop in an emergency braking mode.
And when the first data information is checked, if the first data information is inaccurate, the first data information is ignored, and the next first data information is waited to be received.
The content of the first data sent by the same periodic track side operation control system 1 through the first system train-ground wireless transmission system and the second system train-ground wireless transmission system (the vehicle carrying control system 7) is the same.
And judging whether each piece of first data belongs to the data sent by the trackside operation control system 1 in the same period according to the time stamp obtained by analysis.
Further, when the vehicle-mounted control system 7 does not receive any first data information or only receives one path of first data information within the set time range T1, the vehicle-mounted control system 7 recognizes that the wireless network is interfered or failed, and the vehicle-mounted control system 7 alarms in a failure mode and controls the train to stop in an emergency braking mode.
Further, a second program is preset in the track side operation control system 1, so that when the track side operation control system 1 receives second data transmitted by the vehicle carrying control system 7 through the LTE vehicle-to-ground wireless transmission system and the PIS vehicle-to-ground wireless transmission system, a third data processing step or a fourth data processing step is executed; the second data information comprises check data, a time stamp, trackside operation control information, equipment state information and the like;
A third data processing step comprising: analyzing and checking the second data information when the trackside operation control system 1 receives the first second data information, adopting the second data information as effective data information of the current period when the second data information is accurate, analyzing the second data information when the trackside operation control system 1 receives the next second data information each time, judging whether the second data information and the second data information which is currently adopted belong to data sent by the same period vehicle operation control system 7, if yes, ignoring the second data information, if not, checking the second data information, and adopting the second data information as effective data information of the next period when the second data information is accurate;
a fourth data processing step comprising: the track side operation control system 1 receives second data information in real time, when the track side operation control system 1 receives at least two paths of second data information in a set time range T2 (T2 is set according to requirements), analyzing all the received second data information, checking the second data information, if the condition that at least two paths of second data information in the received multiple paths of second data are identical in content, the track side operation control system 1 adopts the identical second data information as effective data information in the current period, and if the condition that at least two paths of second data information in the received multiple paths of second data are identical in content cannot be met, the track side operation control system 1 confirms that the second data information in the current period is not authentic, and then the next period is entered; if the situation that at least two paths of second data information are identical cannot be checked in N periods continuously occurs, the trackside operation control system 1 confirms that the wireless network is interfered or has a fault, the trackside operation control system 1 carries out fault alarm, and the related train is controlled to take emergency measures.
And when the second data information is checked, if the second data information is inaccurate, ignoring the second data information and waiting for receiving the next second data information.
The content of the second data sent by the same period vehicle carrying control system 7 through the first system vehicle-ground wireless transmission system and the second system vehicle-ground wireless transmission system (the rail side operation control system 1) is the same.
And judging whether each piece of second data belongs to the data sent by the vehicle-mounted control system 7 in the same period according to the time stamp obtained by analysis.
Further, when the trackside operation control system 1 does not receive any second data information or only receives one second data information within the set time range T2, the trackside operation control system 1 recognizes that the wireless network is interfered or has a fault, the trackside operation control system 1 performs fault alarm, and controls the related train to take emergency measures.
Further, the trackside operation control system 1 is an indoor operation control system device arranged at each station, vehicle base, control center and the like, and comprises an ATS subsystem device, a trackside ATP/ATO subsystem device, an interlocking subsystem device, a maintenance monitoring subsystem device, a data transmission subsystem and the like, wherein each subsystem needs to interact with the vehicle-mounted operation control system 7 in real time through a vehicle-to-ground wireless communication subsystem, and comprises ATS schedule information, train movement authorization information, safety protection information and the like.
The ATS subsystem equipment is responsible for monitoring the running condition of a track, the trackside ATP/ATO subsystem equipment is responsible for calculating and generating safety control data of train running and control data of automatic train running, the interlocking subsystem equipment is responsible for calculating and controlling the running state of the whole-line operation control equipment according to safety logic such as track section, turnout opening and closing, signal machine display and the like, the maintenance monitoring subsystem is used for collecting and monitoring the running state of the whole-line operation control equipment, the data transmission subsystem is used for realizing data wired network interaction between each subsystem and related equipment and network transmission safety between different system equipment, and each system can generate real-time data interaction with the vehicle-mounted operation control system 7 through an LTE wireless network and a PIS wireless network so as to jointly ensure the safe and efficient running of the train.
The LTE network device 2 refers to related devices of a main-flow train-ground wireless communication technical scheme of an urban rail transit control system at the present stage, and mainly comprises an EPC core network, a BBU baseband processing unit, an RRU radio frequency unit, a combiner and the like, wherein a dual-network redundancy structure is generally adopted in the rail transit control system. The LTE network equipment 2 can realize the mutual conversion and receiving and transmitting functions of wireless-wired data according to the LTE standard, the LTE network equipment 2 of the urban railway traffic control system is configured in a double-network redundancy mode, and has a certain fault-tolerant mechanism, and the utilized frequency point resources and spectrum bandwidth resources are generally between 1785 MHz-1805 MHz special frequencies. In fig. 1, "3" indicates that the LTE wireless transmission medium 3 generally includes a coaxial leaky cable, an antenna, etc., and in the track traffic control system, a redundancy mode is generally adopted, that is, 2 coaxial leaky cables, or a dual-frequency antenna, etc., are laid, but a single coaxial leaky cable may also be adopted.
The LTE wireless transmission medium 3 generally comprises a coaxial leaky cable and an antenna, has a signal transmission function, and can radiate and receive controlled electromagnetic wave energy, so that the transmission and the reception of LTE wireless data of the urban railway traffic control system are realized; the coaxial leaky cable and the antenna are passive devices and are laid along a track traffic line; the coaxial leaky cable can be laid continuously along the line, the transmitted wireless field intensity is more uniform, but the requirement for laying and installing along the line is relatively higher; the antennas are arranged at intervals along the line, the interval distance is closely related to factors such as line conditions, antenna power and the like, the wireless field intensity emitted by the antennas is attenuated along with the transmission distance, but the installation position of the antennas is flexible, and the installation requirement is relatively low.
The LTE wireless transmission medium 3 generally adopts a redundancy mode in the track traffic control system, i.e. lays 2 coaxial leaky cables, or dual-frequency antennas, etc., but may also adopt a single coaxial leaky cable.
The LTE vehicle-mounted wireless antenna 4 is arranged on a train and can realize the transmission and the reception of LTE wireless data of the operation control system.
The LTE vehicle-mounted wireless access unit 5TAU is arranged on a train and provides train-ground data access service. The LTE in-vehicle wireless access unit 5TAU is connected to the LTE in-vehicle wireless antenna 4 and the in-vehicle network switch 6.
The information safety protection device 8 is arranged beside a track, is generally used as a part of a data transmission subsystem beside the track of the train control system, and is used for data safety isolation between the operation control system and a related interface system, and generally comprises a firewall and the like. The method mainly realizes the safety protection of the data interfaces of other systems except the train control system, and mainly can prevent virus invasion and hacking and has audit function on interaction data.
And the vehicle-mounted network switch 6 is used for converging and receiving network data of the vehicle-mounted control system 7 and the trackside control system 1.
The vehicle-mounted control system 7 generally includes an on-board ATP/ATO device or the like.
The passenger information system 9PIS generally comprises various servers, data transmission equipment and the like of the passenger information system 9, and specifically refers to PIS system equipment arranged in a control center, wherein the PIS system equipment comprises a center server, a video streaming server, a consultation application server, a vehicle-mounted video control terminal, a vehicle-mounted video monitor, video-audio switching control equipment, data transmission equipment (including vehicle-ground wireless transmission equipment) and the like, and a vehicle-ground transmission subsystem of the PIS system generally adopts Wifi wireless network equipment and adopts a single network architecture mode.
The PIS wireless transmission medium 10 generally includes various wireless electromagnetic wave energy radiation and receiving devices such as coaxial leaky cable and antenna.
The PIS vehicle-mounted wireless antenna 11 is arranged on a train and can realize the transmission and the reception of wireless data of a PIS system.
The PIS vehicle-mounted wireless device 12 is installed on a train, and generally includes a vehicle-mounted wireless access unit or the like, and provides wireless data access service to the PIS vehicle.
The vehicle-mounted information safety protection device 13 generally comprises a firewall device, and is installed on a train to mainly realize the safety protection of a data interface of a train control system and a PIS system.
The vehicle-ground wireless data transmission of the operation control system is that the trackside operation control system 1 and the vehicle-mounted operation control system 7 simultaneously perform data transmission through LTE and PIS vehicle-ground wireless channels.
In the process of vehicle-ground wireless information transmission, the trackside operation control system 1 simultaneously transmits the same data information to vehicle-mounted operation control equipment through a wireless network of an LTE wireless network and a wireless network of a PIS system, wherein the data information comprises digital bits such as check data, time stamps, control information, state information and the like; under normal conditions, the vehicle-mounted operation control device can acquire 3 paths of data information through a dual-system wireless network system, as shown in fig. 2, "11" and "22" represent data information transmitted to the vehicle-mounted operation control system 7 by the trackside operation control system 1 through the dual-network redundant LTE network device 2, in fig. 2, "33" represents data information transmitted to the vehicle-mounted operation control system 7 by the trackside operation control system 1 through the PIS wireless network device, and the PIS system network generally adopts a single-network architecture, so "33" represents single-path data information, and of course, the PIS system network can also be set into a multi-network architecture, and "33" represents multi-path data information.
Because of the difference in network architecture, communication protocol, equipment chip processing capacity and the like of the vehicle-ground wireless transmission system of the LTE network and the PIS system, the time of multipath data information received by the vehicle-mounted operation control equipment is in and out; meanwhile, the problems of interference, equipment failure and the like exist, and the problems that 1 path or multiple paths of data cannot be received and the like are likely to occur; therefore, in the present invention, the processing rule of the vehicle-mounted control device for the multipath data is as follows:
1) The method adopts a first-come first-serve processing mode: that is, no matter whether all multipath data information can be received, the vehicle-carried control system 7 only collects the data information received first and ignores the data information received subsequently; the real-time performance of the processing mode is strong, but the security of network data under the condition of opposite terminals is difficult to guarantee, and a certain risk exists.
2) The processing mode of multipath information verification is adopted, and the data information is required to be processed and checked, so that the real-time performance of the mode is relatively weak, but the safety of network data under extreme conditions can be improved, and the driving safety is ensured; the specific flow is as follows:
(1) In the set time range T, namely whether all the multi-channel data information can be received or not, the vehicle-mounted operation control system 7 at least needs to acquire 2 channels of data information and checks the data information after decoding; if at least 2 paths of data information are completely the same, the vehicle-mounted operation control system 7 takes the data as control information; if the received multipath data cannot have the same check condition of at least 2 paths of information, the system determines that the data information in the polling period is not credible and enters the next polling period; if at least 2 paths of information cannot be checked to be the same in N polling periods continuously, the system recognizes that the wireless network is interfered or failed, and the vehicle-mounted operation control system 7 reports the failure and controls the emergency braking and stopping of the train.
(2) In the set time range T, the vehicle-mounted control system 7 does not receive the data information or can only acquire 1 path of data information, and then the vehicle-mounted control system 7 determines that the wireless network is interfered or fails, and the vehicle-mounted control system 7 reports the failure and controls the train to stop in emergency braking.
The invention uses PIS channel as redundant train control wireless communication scheme, based on existing LTE system wireless network, uses train-ground wireless communication data channel of PIS system as redundant data channel of LTE wireless network, thereby reinforcing weak link of urban rail traffic train control system in single system train-ground wireless communication problem, and improving stability and reliability of whole system.
The invention is suitable for the train operation control system in the technical field of full-automatic operation, and meets the requirements on the stability and the usability of the train operation control system under the full-automatic operation working condition by improving the redundancy of the train-ground wireless communication scheme.
Example two
Referring to fig. 1 and 2, the embodiment of the invention also discloses a train control wireless communication method using a PIS channel as redundancy, which comprises the following steps:
an LTE train-ground wireless transmission system and a PIS train-ground wireless transmission system are respectively arranged between the vehicle-mounted operation control system 7 and the trackside operation control system 1;
Real-time data interaction is carried out between the vehicle-carrying control system 7 and the trackside operation control system 1 through an LTE vehicle-ground wireless transmission system;
the real-time data interaction is carried out between the vehicle carrying control system 7 and the trackside operation control system 1 through a PIS vehicle-ground wireless transmission system;
the trackside operation control system 1 transmits first data including check data, a time stamp, train operation control information, equipment status information, and the like to the vehicle-mounted operation control system 7 every set time, and the vehicle-mounted operation control system 7 receives the first data information and performs the first data processing step or the second data processing step.
A first data processing step comprising: analyzing and checking the first data information when the vehicle-mounted control system 7 receives the first data information, when the first data information is accurate, acquiring the first data information as effective data information of the current period, when the vehicle-mounted control system 7 receives the next first data information each time, analyzing the first data information, judging whether the first data information and the first data information of the current acquisition belong to data sent by the track side control system 1 of the same period, if yes, ignoring the first data information, if not, checking the first data information, and when the first data information is accurate, acquiring the first data information as effective data information of the next period;
A second data processing step comprising: the vehicle-mounted operation control system 7 receives first data information in real time, when the vehicle-mounted operation control system 7 receives at least two paths of first data information in a set time range T1 (T1 is set according to requirements), all the received first data information is analyzed, the first data information is checked, if the fact that at least two paths of first data information in multiple paths of received first data are identical in content is met, the vehicle-mounted operation control system 7 adopts the identical first data information as effective data information in a current period, if the fact that at least two paths of first data information in multiple paths of received first data are identical in content cannot be met, the vehicle-mounted operation control system 7 confirms that the first data information in the current period is unreliable, and the next period is entered; if the situation that at least two paths of first data information are identical cannot be checked in N periods continuously occurs, the vehicle-mounted operation control system 7 confirms that the wireless network is interfered or fails, the vehicle-mounted operation control system 7 alarms in a failure mode, and the train is controlled to stop in an emergency braking mode.
If the vehicle-mounted control system 7 can receive the multi-path data information transmitted by the LTE vehicle-ground wireless transmission system, the vehicle-mounted control system 7 can receive the single-path data information or the multi-path data information transmitted by the PIS vehicle-ground wireless transmission system.
Further, when the vehicle-mounted control system 7 does not receive any first data information or only receives one path of first data information within the set time range T1, the vehicle-mounted control system 7 recognizes that the wireless network is interfered or failed, and the vehicle-mounted control system 7 alarms in a failure mode and controls the train to stop in an emergency braking mode.
Further, the vehicle-mounted operation control system 7 receives instruction information of a user, when the vehicle-mounted operation control system 7 receives first instruction information of the user, the vehicle-mounted operation control system 7 executes a first data processing step, and when the vehicle-mounted operation control system 7 receives second instruction information of the user, the vehicle-mounted operation control system 7 executes a second data processing step. The invention can pre-specify or manually adjust (through man-machine interaction adjustment) one of the first data processing step and the second data processing step after the vehicle-mounted operation control system 7 receives the first data information.
Further, the first area and the second area are divided in advance, and when the train is located in the first area, the vehicle-mounted operation control system 7 performs the first data processing step, and when the train is located in the second area, the vehicle-mounted operation control system 7 performs the second data processing step. The present invention can set the sub-areas to execute the first data processing step and the second data processing step, for example, the present invention can be set in the area with less interference, such as the first area, the vehicle-mounted operation control system 7 executes the first data processing step, and in the area with more interference, such as the second area, the vehicle-mounted operation control system 7 executes the second data processing step. In the invention, the single-line underground line section in the rail traffic can be identified as a region with little interference, namely a first region, and the multi-line parallel underground line section, the overhead line section and the ground line section are identified as regions with more interference, namely a second region.
The vehicle-mounted control system 7 has a function of automatically measuring the current position of the train, and the vehicle-mounted control system 7 can judge the given area to which the train belongs according to the current train position information, namely, can adopt a corresponding data receiving and transmitting strategy.
Further, the vehicle-mounted operation control system 7 may also have a wireless interference measurement function, and the wireless interference measurement may perform interference measurement for the first network system and the second network system at the same time; when the measured amount of interference is small, i.e. the amount of interference is less than or equal to the set threshold value, the vehicle-mounted operation control system 7 may employ the first data processing step, and when the measured amount of interference is large, i.e. greater than the set threshold value, the vehicle-mounted operation control system 7 performs the second data processing step.
When the vehicle-mounted operation control system 7 performs the first data processing step, the general trackside operation control system 1 performs the third data processing step, and when the vehicle-mounted operation control system 7 performs the second data processing step, the general trackside operation control system 1 performs the fourth data processing step. Of course, the present invention is not limited to the above embodiment, and may be set as desired.
The present invention may also be configured to set a program for executing the first data processing step only in the vehicle-mounted operation control system 7, or may be configured to set a program for executing the second data processing step only in the vehicle-mounted operation control system 7.
Further, the vehicle-mounted operation control system 7 transmits second data to the trackside operation control system 1 at intervals of a set time, the second data information includes check data, a time stamp, trackside operation control information, equipment state information and the like, and the trackside operation control system 1 receives the second data information and executes a third data processing step or a fourth data processing step;
a third data processing step comprising: analyzing and checking the second data information when the trackside operation control system 1 receives the first second data information, adopting the second data information as effective data information of the current period when the second data information is accurate, analyzing the second data information when the trackside operation control system 1 receives the next second data information each time, judging whether the second data information and the second data information which is currently adopted belong to data sent by the same period vehicle operation control system 7, if yes, ignoring the second data information, if not, checking the second data information, and adopting the second data information as effective data information of the next period when the second data information is accurate;
a fourth data processing step comprising: the track side operation control system 1 receives second data information in real time, when the track side operation control system 1 receives at least two paths of second data information in a set time range T2 (T2 is set according to requirements), analyzing all the received second data information, checking the second data information, if the condition that at least two paths of second data information in the received multiple paths of second data are identical in content, the track side operation control system 1 adopts the identical second data information as effective data information in the current period, and if the condition that at least two paths of second data information in the received multiple paths of second data are identical in content cannot be met, the track side operation control system 1 confirms that the second data information in the current period is not authentic, and then the next period is entered; if the situation that at least two paths of second data information are identical cannot be checked in N periods continuously occurs, the trackside operation control system 1 confirms that the wireless network is interfered or has a fault, the trackside operation control system 1 carries out fault alarm, and the related train is controlled to take emergency measures.
If the track side operation control system 1 can receive the multi-path data information transmitted by the LTE train-ground wireless transmission system, the track side operation control system 1 can receive the single-path data information or the multi-path data information transmitted by the PIS train-ground wireless transmission system.
Further, when the trackside operation control system 1 does not receive any second data information or only receives one second data information within the set time range T2, the trackside operation control system 1 recognizes that the wireless network is interfered or has a fault, the trackside operation control system 1 performs fault alarm, and controls the related train to take emergency measures.
The present invention may set a program for executing the third data processing step only in the trackside operation control system 1, or may set a program for executing the fourth data processing step only in the trackside operation control system 1.
The invention uses PIS channel as redundant train control wireless communication scheme, based on existing LTE system wireless network, uses train-ground wireless communication data channel of PIS system as redundant data channel of LTE wireless network, thereby reinforcing weak link of urban rail traffic train control system in single system train-ground wireless communication problem, and improving stability and reliability of whole system. According to the train control wireless communication system, the PIS channel is used as a redundant train control wireless communication scheme, and even if an LTE wireless network fails, the train control subsystem can perform real-time data interaction with the trackside operation control subsystem through the train ground wireless network of the PIS system, so that the redundancy and feasibility of the train ground wireless communication system are further enhanced. The track side operation control system 1 and the vehicle-mounted operation control system 7 can perform real-time interaction of data through two wireless channels of LTE and PIS, and the data transmission can adopt a first-come first-use processing logic or a multi-channel data checking and verification processing mode. Because the technical characteristics and the wireless frequency point resources adopted by the wireless communication of the PIS system are different from those of the existing LTE technical system, the common-frequency interference probability of the whole system is reduced; meanwhile, the redundancy of the ground wireless communication channel is increased, the overall stability and reliability of the wireless system are improved, and the line operation service level is improved.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (10)
1. A column control wireless communication system utilizing a PIS channel as redundancy, characterized by: the system comprises an LTE train-ground wireless transmission system and a PIS train-ground wireless transmission system, wherein the LTE train-ground wireless transmission system is positioned between a train carrying control system and a rail side carrying control system and is used for realizing real-time data interaction between the train carrying control system and the rail side carrying control system, the PIS train-ground wireless transmission system is positioned between the train carrying control system and the rail side carrying control system and is used for realizing real-time data interaction between the train carrying control system and the rail side carrying control system, the PIS train-ground wireless transmission system comprises a passenger information system, a PIS wireless transmission medium, a PIS vehicle-mounted wireless antenna and PIS vehicle-mounted wireless equipment, the passenger information system is connected with the rail side carrying control system, the passenger information system is connected with the PIS wireless transmission medium, the PIS vehicle-mounted wireless antenna is connected with the PIS vehicle-mounted wireless equipment, and the PIS vehicle-mounted wireless equipment is connected with the vehicle-mounted carrying control system through a vehicle network switch.
2. A train control wireless communication system utilizing a PIS channel as redundancy in accordance with claim 1, wherein: and information safety protection equipment is arranged between the passenger information system and the trackside operation control system.
3. A train control wireless communication system utilizing a PIS channel as redundancy in accordance with claim 1, wherein: the PIS vehicle-mounted wireless equipment is connected with the vehicle-mounted information safety protection equipment, and the vehicle-mounted information safety protection equipment is connected with the vehicle-mounted operation control system through the vehicle-mounted network switch.
4. A train control wireless communication system utilizing a PIS channel as redundancy in accordance with claim 1, wherein: the LTE train-ground wireless transmission system comprises LTE network equipment, an LTE wireless transmission medium, an LTE vehicle-mounted wireless antenna and an LTE vehicle-mounted wireless access unit, wherein the LTE vehicle-mounted wireless antenna and the LTE vehicle-mounted wireless access unit are installed on a train, the LTE network equipment is connected with a trackside operation control system and the LTE wireless transmission medium, the LTE wireless transmission medium is used for realizing transmission and reception of LTE wireless data, the LTE vehicle-mounted wireless antenna is used for realizing transmission and reception of the LTE wireless data, the LTE vehicle-mounted wireless antenna is connected with the LTE vehicle-mounted wireless access unit, and the LTE vehicle-mounted wireless access unit is connected with the vehicle-mounted operation control system through a vehicle-mounted network switch.
5. A train control wireless communication system utilizing a PIS channel as redundancy in accordance with claim 1, wherein: a first program is preset in the vehicle-mounted operation control system, so that when the vehicle-mounted operation control system receives first data transmitted by the track-side operation control system through the LTE vehicle-to-ground wireless transmission system and the PIS vehicle-to-ground wireless transmission system, a first data processing step or a second data processing step is executed; the first data information comprises check data, a time stamp, train operation control information and equipment state information;
a first data processing step comprising: analyzing and checking first data information when the vehicle-mounted transportation control system receives the first data information, when the first data information is accurate, acquiring the first data information as effective data information of a current period, when the vehicle-mounted transportation control system receives the next first data information each time, analyzing the first data information, judging whether the first data information and the first data information of the current acquisition belong to data sent by a track side transportation control system of the same period or not, if yes, ignoring the first data information, if not, checking the first data information, and when the first data information is accurate, acquiring the first data information as effective data information of the next period;
A second data processing step comprising: the vehicle-mounted operation control system receives first data information in real time, when the vehicle-mounted operation control system receives at least two paths of first data information in a set time range T1, all the received first data information is analyzed, the first data information is checked, if the condition that at least two paths of first data information in the received multiple paths of first data are identical in content is met, the vehicle-mounted operation control system adopts the identical first data information as effective data information in a current period, and if the condition that at least two paths of first data information in the received multiple paths of first data are identical in content cannot be met, the vehicle-mounted operation control system confirms that the first data information in the current period is unreliable and enters the next period; if the situation that at least two paths of first data information are identical cannot be checked in N periods continuously occurs, the vehicle-mounted operation control system confirms that the wireless network is interfered or fails, and the vehicle-mounted operation control system alarms the failure and controls the train to stop in emergency braking.
6. A method of column control wireless communication utilizing a PIS channel as redundancy, comprising the steps of:
an LTE train-ground wireless transmission system and a PIS train-ground wireless transmission system are respectively arranged between the vehicle-mounted operation control system and the trackside operation control system;
Real-time data interaction is carried out between the vehicle carrying control system and the trackside carrying control system through an LTE vehicle-ground wireless transmission system;
real-time data interaction is carried out between the vehicle carrying control system and the trackside carrying control system through a PIS vehicle-ground wireless transmission system;
the track side operation control system sends first data to the vehicle-mounted operation control system at intervals of set time, wherein the first data information comprises check data, a time stamp, train operation control information and equipment state information, and the vehicle-mounted operation control system receives the first data information and executes a first data processing step or a second data processing step;
a first data processing step comprising: analyzing and checking first data information when the vehicle-mounted transportation control system receives the first data information, when the first data information is accurate, acquiring the first data information as effective data information of a current period, when the vehicle-mounted transportation control system receives the next first data information each time, analyzing the first data information, judging whether the first data information and the first data information of the current acquisition belong to data sent by a track side transportation control system of the same period or not, if yes, ignoring the first data information, if not, checking the first data information, and when the first data information is accurate, acquiring the first data information as effective data information of the next period;
A second data processing step comprising: the vehicle-mounted operation control system receives first data information in real time, when the vehicle-mounted operation control system receives at least two paths of first data information in a set time range T1, all the received first data information is analyzed, the first data information is checked, if the condition that at least two paths of first data information in the received multiple paths of first data are identical in content is met, the vehicle-mounted operation control system adopts the identical first data information as effective data information in a current period, and if the condition that at least two paths of first data information in the received multiple paths of first data are identical in content cannot be met, the vehicle-mounted operation control system confirms that the first data information in the current period is unreliable and enters the next period.
7. The method of column-controlled wireless communication using PIS channels as redundancy as recited in claim 6, wherein: if the situation that at least two paths of first data information are identical cannot be checked in N periods continuously occurs, the vehicle-mounted operation control system confirms that the wireless network is interfered or fails, and the vehicle-mounted operation control system alarms the failure and controls the train to stop in emergency braking;
when the vehicle-mounted operation control system does not receive any first data information or only receives one path of first data information within the set time range T1, the vehicle-mounted operation control system confirms that the wireless network is interfered or fails, and the vehicle-mounted operation control system carries out failure alarm and controls the train to stop in emergency braking.
8. The method of column-controlled wireless communication using PIS channels as redundancy as recited in claim 6, wherein: the vehicle-mounted operation control system receives the instruction information of the user, when the vehicle-mounted operation control system receives the first instruction information of the user, the vehicle-mounted operation control system executes the first data processing step, and when the vehicle-mounted operation control system receives the second instruction information of the user, the vehicle-mounted operation control system executes the second data processing step.
9. The method of column-controlled wireless communication using PIS channels as redundancy as recited in claim 6, wherein: the method comprises the steps that a first area and a second area are divided in advance, when a train is located in the first area, the vehicle-mounted operation control system executes a first data processing step, and when the train is located in the second area, the vehicle-mounted operation control system executes a second data processing step.
10. The method of column-controlled wireless communication using PIS channels as redundancy as recited in claim 6, wherein: and performing interference detection, wherein when the measured interference amount is smaller than or equal to a set threshold value, the vehicle-mounted operation control system performs a first data processing step, and when the measured interference amount is larger than the set threshold value, the vehicle-mounted operation control system performs a second data processing step.
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