CN108235231B - Method and device for distinguishing train advancing direction in rail transit - Google Patents
Method and device for distinguishing train advancing direction in rail transit Download PDFInfo
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- CN108235231B CN108235231B CN201611178287.2A CN201611178287A CN108235231B CN 108235231 B CN108235231 B CN 108235231B CN 201611178287 A CN201611178287 A CN 201611178287A CN 108235231 B CN108235231 B CN 108235231B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/025—Services making use of location information using location based information parameters
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Abstract
The invention discloses a method and a device for judging the advancing direction of a train in rail transit, wherein the method comprises the following steps: acquiring cell information entered by a wireless communication terminal on a train; judging the type of a cell according to cell information, wherein the cell type comprises at least one of a cell of a first sending station, a cell of an intermediate station and a cell of a terminal station; and determining the traveling direction of the train according to the cell type. The travel direction of the train can be simply and conveniently judged, a position positioning device does not need to be added, and the cost is saved.
Description
Technical Field
The invention belongs to the technical field of communication, and particularly relates to a method and a device for judging the traveling direction of a train in rail transit.
Background
In a wireless communication scene of rail transit, the position of a wireless communication terminal on a train is accurately judged, and for judging the position of a switching point in wireless communication, it is very important to prejudge the behavior of the wireless communication terminal and the change trend of signal intensity. The accurate judgment of the position of the wireless terminal is beneficial to improving the communication quality of the whole system. In addition, the accurate position of the train can be further judged by judging the position of the wireless terminal, and the method is very important for judging the position of the train and even avoiding traffic accidents.
In a wireless communication scene of rail transit, the distance between a wireless communication terminal and a base station can be acquired through a ranging process. The position change relation with the base station can be judged through the distance change between the terminal and the base station. However, to accurately locate the position of the terminal, the current train running direction needs to be determined in addition to the distance between the terminal and the base station and the trend of the change of the distance.
At present, the method for judging the traveling direction of the train can be realized by a GPS positioning mode and the like, but the method needs a special GPS function to realize the position positioning, so that the traveling direction of the train is determined according to the position change, the method needs to increase the equipment cost investment, and the method cannot be used in underground railways, tunnels and other situations without GPS signals.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a method and an apparatus for determining a train traveling direction in rail transit. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
The embodiment of the invention provides a method for judging the advancing direction of a train in rail transit, which comprises the following steps:
acquiring cell information entered by a wireless communication terminal on a train;
judging the type of a cell according to cell information, wherein the cell type comprises at least one of a cell of a first sending station, a cell of an intermediate station and a cell of a terminal station;
and determining the traveling direction of the train according to the cell type.
In some optional embodiments, the cell information comprises address information of a cell;
correspondingly, the determining the type of the cell according to the cell information specifically includes:
and inquiring a pre-established corresponding relation table of the cell address and the cell type according to the cell address information, and determining the cell type as a cell of the initial station, a cell of the intermediate station or a cell of the terminal station.
In some optional embodiments, the determining the traveling direction of the train according to the cell type specifically includes:
when the train is electrified and started:
if the type of a cell entered by a wireless communication terminal on the train is a cell of a first sending station, judging that the advancing direction of the train is towards the direction of a terminal station;
if the type of a cell entered by a wireless communication terminal on the train is a terminal station cell, judging that the advancing direction of the train is towards the direction of a first station;
and if the cell type of the wireless communication terminal on the train is the middle station cell, judging that the advancing direction of the train is consistent with the former advancing direction.
In some optional embodiments, the determining the traveling direction of the train according to the cell type further includes:
under the normal operating condition of the train:
if the type of a cell entered by a wireless communication terminal on the train is a cell of a first sending station, starting timing, and when the timing delay time reaches a specified first delay time threshold, judging that the advancing direction of the train is changed to the direction of a terminal station;
if the type of the cell entered by the wireless communication terminal on the train is the terminal station cell, starting timing, and when the timing delay time reaches a specified second delay time threshold, judging that the advancing direction of the train is changed to the direction of the initial station;
and if the cell type of the wireless communication terminal on the train is the middle station cell, judging that the advancing direction of the train is consistent with the former advancing direction.
In some optional embodiments, the first delay time threshold is greater than a running time after the cell enters the initial station when running towards the initial station, and is less than a sum of the running time after the cell enters the initial station and a parking time at the initial station;
the second delay time threshold is larger than the running time of the cell after entering the terminal station when running towards the terminal station direction, and is smaller than the sum of the running time after entering the terminal station and the parking time at the terminal station.
The embodiment of the present invention further provides a device for determining a train traveling direction in rail transit, including:
the acquisition module is used for acquiring cell information entered by a wireless communication terminal on the train;
the judging module is used for judging the type of the cell according to the cell information, wherein the cell type comprises at least one of a cell of a first sending station, a cell of an intermediate station and a cell of a terminal station;
and the determining module is used for determining the traveling direction of the train according to the cell type.
In some optional embodiments, the obtaining module is specifically configured to obtain cell information including address information of a cell; accordingly, the method can be used for solving the problems that,
the judgment module is specifically configured to:
and inquiring a pre-established corresponding relation table of the cell address and the cell type according to the cell address information, and determining the cell type as a cell of the initial station, a cell of the intermediate station or a cell of the terminal station.
In some optional embodiments, the determining module is specifically configured to:
when the train is electrified and started:
if the type of a cell entered by a wireless communication terminal on the train is a cell of a first sending station, judging that the advancing direction of the train is towards the direction of a terminal station;
if the type of a cell entered by a wireless communication terminal on the train is a terminal station cell, judging that the advancing direction of the train is towards the direction of a first station;
and if the cell type of the wireless communication terminal on the train is the middle station cell, judging that the advancing direction of the train is consistent with the former advancing direction.
In some optional embodiments, the determining module is further configured to:
under the normal operating condition of the train:
if the type of a cell entered by a wireless communication terminal on the train is a cell of a first sending station, starting timing, and when the timing delay time reaches a specified first delay time threshold, judging that the advancing direction of the train is changed to the direction of a terminal station;
if the type of the cell entered by the wireless communication terminal on the train is the terminal station cell, starting timing, and when the timing delay time reaches a specified second delay time threshold, judging that the advancing direction of the train is changed to the direction of the initial station;
and if the cell type of the wireless communication terminal on the train is the middle station cell, judging that the advancing direction of the train is consistent with the former advancing direction.
In some optional embodiments, the determining module is specifically configured to:
the appointed first delay time threshold is larger than the running time of the cell after entering the initial station when running towards the initial station direction and is smaller than the sum of the running time after entering the initial station and the parking time at the initial station;
the specified second delay time threshold is larger than the running time of the cell after entering the terminal station when running towards the terminal station direction, and is smaller than the sum of the running time after entering the terminal station and the parking time at the terminal station.
The method and the device for judging the advancing direction of the train in the rail transit, provided by the embodiment of the invention, can be used for accurately judging the advancing direction of the train according to the condition of the cell through which the train passes without adding a special position detection module, are simple and convenient to realize, are very suitable for the scene of the rail transit, and can be used for judging the advancing direction of the train without increasing equipment cost.
For the purposes of the foregoing and related ends, the one or more embodiments include the features hereinafter fully described and particularly pointed out in the claims. The following description and the annexed drawings set forth in detail certain illustrative aspects and are indicative of but a few of the various ways in which the principles of the various embodiments may be employed. Other benefits and novel features will become apparent from the following detailed description when considered in conjunction with the drawings and the disclosed embodiments are intended to include all such aspects and their equivalents.
Drawings
The accompanying drawings, which are included to provide a further understanding 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 and not to limit the invention. In the drawings:
fig. 1 is a flowchart of a method for determining a traveling direction of a train in rail transit according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a relationship between a train and a cell according to a first embodiment of the present invention;
FIG. 3 is a flowchart of a method for determining a traveling direction of a train in rail transit according to a second embodiment of the present invention;
fig. 4 is a flowchart of a method for determining a train traveling direction in rail transit according to a third embodiment of the present invention;
fig. 5 is a schematic structural diagram of a device for determining a traveling direction of a train in rail transit according to an embodiment of the present invention.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of embodiments of the invention encompasses the full ambit of the claims, as well as all available equivalents of the claims. Embodiments of the invention may be referred to herein, individually or collectively, by the term "invention" merely for convenience and without intending to voluntarily limit the scope of this application to any single invention or inventive concept if more than one is in fact disclosed.
In order to solve the problems that a position positioning module needs to be added and the equipment cost is increased when the train advancing direction is judged in the prior art, the embodiment of the invention provides a train advancing direction judging method aiming at a rail transit scene. The method is realized by aiming at the characteristics of the scene of rail transit, can be applied to various scenes needing to judge the running direction of the train in the rail transit, and is realized by the wireless terminal on the train, and the moving direction of the wireless terminal on the train can be estimated after the running direction of the train is judged, so that the method can be widely used for pre-judging the switching point of the wireless terminal, pre-judging the behavior of the wireless terminal, positioning the position of the train, a train control system and the like in the wireless communication.
Example one
The embodiment of the invention provides a method for judging the advancing direction of a train in rail transit, the flow of which is shown in figure 1, and the method comprises the following steps:
step S101: and acquiring cell information entered by a wireless communication terminal on the train.
In the process of power-on starting and normal operation of a train, when the train enters a certain cell, a wireless communication terminal on the train acquires information of the entering cell, wherein the cell information can comprise address information of the cell, such as an MAC address. Of course, the base station number, the base station location, etc. of the cell may also be included, and the address information is taken as an example in the present invention.
Step S102: and judging the type of the cell according to the cell information.
The cell type includes at least one of a head station cell, an intermediate station cell, and a terminal station cell. After the cell information is obtained, whether the type of the cell where the train enters is a cell of a first sending station, a cell of an intermediate station or a cell of a terminal station can be determined according to the cell information. When the type of the cell is judged, the pre-established corresponding relation table of the cell address and the cell type can be inquired according to the cell address information, and the type of the cell is determined to be an initial station cell, an intermediate station cell or a terminal station cell.
The train is characterized in that a first departure station and a terminal station are relatively fixed in the running process by combining the characteristics of rail transit. The train travels back and forth between the origination station and the destination station. The wireless communication base stations are arranged along the track and respectively cover different areas of the track. Different communication base stations have a single Media Access Control (MAC) address that can be used to identify the different base stations. The MAC address is broadcast periodically during the wireless communication. The wireless terminal, upon receiving the MAC address, can determine in which cell the base station is located. Because the initial station and the terminal station are relatively fixed, the MAC address of the initial station, the MAC address of the terminal station and the MAC addresses of all intermediate stations can be configured in advance in the running process of the train, so that when a wireless communication terminal enters a certain cell, whether the wireless communication terminal enters the corresponding cell or not can be determined. This implementation principle is shown in fig. 2:
in fig. 2, the train configuration address MAC _1 is the address of the head-end station, the addresses MAC _2, MAC _3, … …, MAC _ N +1, MAC _ N +2, … …, and MAC _ N-1 are the addresses of the intermediate stations, and the address MAC _ N is the address of the end-end station. Therefore, when the corresponding MAC address is obtained, whether the current cell is located in the cell of the initial station, the cell of the terminal station or the cell of the intermediate station can be judged. It is specifically noted that since the train travels back and forth between the origin terminals, the destination is also the origin of a particular passenger for passengers boarding the destination in the direction of the origin. In this scheme, in order to clearly distinguish the stations at both ends, the station at one end is referred to as a head station, and the station at the other end is referred to as a destination station.
Step S103: and determining the traveling direction of the train according to the cell type.
When the train traveling direction is judged, the judgment needs to be carried out according to the condition that the train is just powered on to operate and the condition that the train has already operated for a period of time.
When the train is electrified and started:
if the type of a cell entered by a wireless communication terminal on the train is a cell of a first sending station, judging that the advancing direction of the train is towards the direction of a terminal station;
if the type of a cell entered by a wireless communication terminal on the train is a terminal station cell, judging that the advancing direction of the train is towards the direction of a first station;
and if the cell type of the wireless communication terminal on the train is the middle station cell, judging that the advancing direction of the train is consistent with the former advancing direction.
After the train has been running for a period of time, under the normal running state of the train:
if the type of a cell entered by a wireless communication terminal on the train is a cell of a first sending station, starting timing, and when the timing delay time reaches a specified first delay time threshold, judging that the advancing direction of the train is changed to the direction of a terminal station;
if the type of the cell entered by the wireless communication terminal on the train is the terminal station cell, starting timing, and when the timing delay time reaches a specified second delay time threshold, judging that the advancing direction of the train is changed to the direction of the initial station;
and if the cell type of the wireless communication terminal on the train is the middle station cell, judging that the advancing direction of the train is consistent with the former advancing direction.
The first delay time threshold is greater than the running time of the cell after entering the initial station when running towards the initial station direction and less than the sum of the running time after entering the initial station and the parking time at the initial station; the second delay time threshold is larger than the running time of the cell after entering the terminal station when running towards the terminal station, and is smaller than the sum of the running time after entering the terminal station and the parking time at the terminal station.
Example two
The second embodiment of the present invention provides a method for determining a train traveling direction in rail transit, which is described in terms of a situation that a train has just been powered on to operate, and a flow of the method is shown in fig. 3, and the method includes the following steps:
step S301: the equipment is just powered on or the train is just running.
Step S302: and checking the cell type entered by the train wireless communication equipment.
If the cell of the initial station is located, executing step S303; if the terminal is in the cell, go to step S304; if so, step S305 is executed.
Step S303: and judging that the train running direction is towards the terminal station.
And if the type of the cell entered by the wireless communication terminal on the train is the cell of the initial station, judging that the advancing direction of the train is towards the direction of the terminal station.
Step S304: and judging that the running direction of the train is towards the direction of the initial station.
And if the type of the cell entered by the wireless communication terminal on the train is the terminal station cell, judging that the traveling direction of the train is to run towards the direction of the initial station.
Step S305: and in an abnormal state, the original direction is kept unchanged.
And if the cell type of the wireless communication terminal on the train is the middle station cell, judging that the advancing direction of the train is consistent with the former advancing direction. In this case, the vehicle is normally stopped in an abnormal state and then started by powering on.
Step S306: the train enters a normal running state.
When the wireless communication terminal is just powered on, because the train running directions of the initial station and the terminal station are unique, the train departing from the base station cell where the initial station is located can only run towards the terminal station, and the train departing from the base station cell where the terminal station is located can only run towards the initial station. When the train just starts to operate, the wireless communication terminal on the train just starts to operate, and if the train is in the cell of the initial station, the train can be judged to operate towards the direction of the terminal station. On the contrary, if the train runs in the direction of the initial station, the train can be judged to run in the direction of the initial station. Under normal circumstances, the wireless communication terminal does not start operating at the intermediate station. When such a situation occurs, there are many cases where there are abnormal causes such as temporary power failure and equipment failure. Under the condition, the failure recovery is assumed to be fast, the original train running direction is kept unchanged, and meanwhile, an abnormal alarm mechanism can be triggered.
EXAMPLE III
The third embodiment of the present invention provides a method for determining a train traveling direction in rail transit, which is described in terms of a situation that a train is in a normal running state after having run for a period of time, and a flow of the method is shown in fig. 4, and the method includes the following steps:
step S401: the train is in a normal running state.
After the train is in a normal running state, the train returns to the terminal station to continue running towards the initial station, and returns to the terminal station to run after arriving at the initial station.
In this case, when a train enters a cell of a starting station or a terminal station during operation, since the train changes its traveling direction within the cell of the starting station and the terminal station, both traveling directions are possible in both cells. The scheme is unique in how to judge the running direction of the train in the range of the cells covered by the base stations of the initial station and the terminal station.
Step S402: and checking the cell type entered by the train wireless communication equipment.
If yes, executing step S403; if the cell is the terminal station, go to step S405; if so, step S407 is executed.
Step S403: the timing monitoring is started, and step S404 is executed after the timing is finished.
And if the cell type entered by the wireless communication terminal on the train is the cell of the first sending station, starting timing.
Step S404: and judging that the train running direction is towards the terminal station.
When the counted delay time reaches a first delay time threshold value, it is determined that the traveling direction of the train is changed to the direction of the terminal. And returns to step S401.
When the train stops at a first departure station or a terminal station, a large number of passengers need to get on or off the train, and even the train needs to be cleaned, so the stop time is long. Due to the limited coverage area of a single base station, the travel time (T-RUN) of a train from entering a cell where a head-end or a terminal is located to stopping is small compared with the stopping time (T-STOP). Although the speed at which the train travels and the stopping time may fluctuate per train number, the fluctuation is less than the stopping time (T-STOP). And the train will reverse the direction of travel after the end of the stopping time. Therefore, a DELAY time (T-DELAY) is set, and the value of the T-DELAY is larger than the traveling time (T-RUN) from entering the cell to stopping of all the trains and smaller than the sum of the traveling time (T-RUN) from entering the cell to stopping of all the trains and the stopping time (T-STOP). The wireless communication terminal on the train changes the traveling direction of the train to the direction toward the terminal station after the time of T-DELAY. Namely, the first delay time threshold is larger than the running time of the cell after entering the initial station when running towards the initial station direction, and is smaller than the sum of the running time after entering the initial station and the parking time at the initial station.
Taking the initial station as an example, the train traveling direction is not immediately modified after the train enters the coverage cell of the initial station, and the train traveling direction is still set to be towards the initial station. And starting timing at the same time, and modifying the traveling direction of the train to be towards the terminal station after the DELAY time (T-DELAY) is passed. Since the value of T _ DELAY is greater than the running time (T-RUN), the direction of train travel is not changed until the train arrives at the primary stop and stops. This determination is in accordance with the actual situation. After the train stops, the train starts traveling in the direction of the terminal. Since the DELAY time T-DELAY is smaller than the sum of T-RUN and T-STOP, the traveling direction of the train is already changed to the terminal direction before the train starts traveling in the terminal direction, in accordance with the actual situation.
Step S405: the timing monitoring is started, and step S406 is executed after the timing is finished.
And if the type of the cell entered by the wireless communication terminal on the train is the terminal station cell, starting timing.
Step S406: and judging that the running direction of the train is towards the direction of the initial station.
When the timing delay time reaches a specified second delay time threshold value, judging that the advancing direction of the train is changed to the direction of the initial station; and returns to step S401.
The situation of the terminal station is similar to that of the first terminal station, namely the second delay time threshold is larger than the running time of the cell after entering the terminal station when running towards the terminal station direction and is smaller than the sum of the running time after entering the terminal station and the parking time at the terminal station. Referring to step S404 specifically, details are not repeated here.
Step S407: the original direction is kept unchanged.
And if the cell type of the wireless communication terminal on the train is the middle station cell, judging that the advancing direction of the train is consistent with the former advancing direction.
Based on the same inventive concept, an embodiment of the present invention further provides a device for determining a train traveling direction in rail transit, which has a structure shown in fig. 5 and includes: an acquisition module 501, a judgment module 502 and a determination module 503.
An obtaining module 501, configured to obtain cell information of a wireless communication terminal on a train.
A determining module 502, configured to determine a cell type according to cell information, where the cell type includes at least one of a cell of a first sending station, a cell of an intermediate station, and a cell of a terminal station.
A determining module 503, configured to determine a traveling direction of the train according to the cell type.
Preferably, the obtaining module 501 is specifically configured to obtain cell information including address information of a cell; correspondingly, the determining module 502 is specifically configured to query a pre-established correspondence table between cell addresses and cell types according to the cell address information, and determine that the cell type is an originating cell, an intermediate cell, or a terminating cell.
Preferably, the determining module 503 is specifically configured to:
when the train is electrified and started:
if the type of a cell entered by a wireless communication terminal on the train is a cell of a first sending station, judging that the advancing direction of the train is towards the direction of a terminal station;
if the type of a cell entered by a wireless communication terminal on the train is a terminal station cell, judging that the advancing direction of the train is towards the direction of a first station;
and if the cell type of the wireless communication terminal on the train is the middle station cell, judging that the advancing direction of the train is consistent with the former advancing direction.
Preferably, the determining module 503 is further configured to:
under the normal operating condition of the train:
if the type of a cell entered by a wireless communication terminal on the train is a cell of a first sending station, starting timing, and when the timing delay time reaches a specified first delay time threshold, judging that the advancing direction of the train is changed to the direction of a terminal station;
if the type of the cell entered by the wireless communication terminal on the train is the terminal station cell, starting timing, and when the timing delay time reaches a specified second delay time threshold, judging that the advancing direction of the train is changed to the direction of the initial station;
and if the cell type of the wireless communication terminal on the train is the middle station cell, judging that the advancing direction of the train is consistent with the former advancing direction.
Preferably, the determining module 503 is specifically configured to:
the appointed first delay time threshold is larger than the running time of the cell after entering the initial station when running towards the initial station direction and is smaller than the sum of the running time after entering the initial station and the parking time at the initial station;
the specified second delay time threshold is larger than the running time of the cell after entering the terminal station when running towards the terminal station direction, and is smaller than the sum of the running time after entering the terminal station and the parking time at the terminal station.
The method and the device of the embodiment of the invention fully consider the characteristics of train operation, fully utilize the difference between the stop time of the train and the time of the train passing through the cell, and simply, conveniently and quickly judge the train advancing direction by combining the unique characteristics of rail transit. The method is different from the traditional method of utilizing a train schedule or other external input information, the method for judging the train advancing is simply utilized by the MAC address of the wireless communication base station, various solutions under special conditions are fully considered, the judgment of the train advancing direction can be realized by utilizing the wireless communication base station under the condition of not adding a positioning module aiming at the characteristics of rail transit, and the cost is greatly reduced.
Unless specifically stated otherwise, terms such as processing, computing, calculating, determining, displaying, or the like, may refer to an action and/or process of one or more processing or computing systems or similar devices that manipulates and transforms data represented as physical (e.g., electronic) quantities within the processing system's registers and memories into other data similarly represented as physical quantities within the processing system's memories, registers or other such information storage, transmission or display devices. Information and signals may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
It should be understood that the specific order or hierarchy of steps in the processes disclosed is an example of exemplary approaches. Based upon design preferences, it is understood that the specific order or hierarchy of steps in the processes may be rearranged without departing from the scope of the present disclosure. The accompanying method claims present elements of the various steps in a sample order, and are not intended to be limited to the specific order or hierarchy presented.
In the foregoing detailed description, various features are grouped together in a single embodiment for the purpose of streamlining the disclosure. This method of disclosure is not to be interpreted as reflecting an intention that the claimed embodiments of the subject matter require more features than are expressly recited in each claim. Rather, as the following claims reflect, invention lies in less than all features of a single disclosed embodiment. Thus, the following claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.
Those of skill would further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. The ASIC may reside in a user terminal. Of course, the processor and the storage medium may reside as discrete components in a user terminal.
For a software implementation, the techniques described herein may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein. The software codes may be stored in memory units and executed by processors. The memory unit may be implemented within the processor or external to the processor, in which case it can be communicatively coupled to the processor via various means as is known in the art.
What has been described above includes examples of one or more embodiments. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing the aforementioned embodiments, but one of ordinary skill in the art may recognize that many further combinations and permutations of various embodiments are possible. Accordingly, the embodiments described herein are intended to embrace all such alterations, modifications and variations that fall within the scope of the appended claims. Furthermore, to the extent that the term "includes" is used in either the detailed description or the claims, such term is intended to be inclusive in a manner similar to the term "comprising" as "comprising" is interpreted when employed as a transitional word in a claim. Furthermore, any use of the term "or" in the specification of the claims is intended to mean a "non-exclusive or".
Claims (8)
1. A method for judging the advancing direction of a train in rail transit is characterized by comprising the following steps:
acquiring cell information entered by a wireless communication terminal on a train;
judging the type of a cell according to cell information, wherein the cell type comprises at least one of a cell of a first sending station, a cell of an intermediate station and a cell of a terminal station;
determining the advancing direction of the train according to the cell type and the train running state; the train operation state includes: the train is powered on and started and runs normally;
when the train is in a normal running state:
if the type of a cell entered by a wireless communication terminal on the train is a cell of a first sending station, starting timing, and when the timing delay time reaches a specified first delay time threshold, judging that the advancing direction of the train is changed to the direction of a terminal station;
if the type of the cell entered by the wireless communication terminal on the train is the terminal station cell, starting timing, and when the timing delay time reaches a specified second delay time threshold, judging that the advancing direction of the train is changed to the direction of the initial station;
and if the cell type of the wireless communication terminal on the train is the middle station cell, judging that the advancing direction of the train is consistent with the former advancing direction.
2. The method of claim 1, wherein the cell information includes address information of a cell;
correspondingly, the determining the type of the cell according to the cell information specifically includes:
and inquiring a pre-established corresponding relation table of the cell address and the cell type according to the cell address information, and determining the cell type as a cell of the initial station, a cell of the intermediate station or a cell of the terminal station.
3. The method of claim 1 or 2, wherein the determining the traveling direction of the train according to the cell type and the train running state further comprises:
when the train is electrified and started:
if the type of a cell entered by a wireless communication terminal on the train is a cell of a first sending station, judging that the advancing direction of the train is towards the direction of a terminal station;
if the type of a cell entered by a wireless communication terminal on the train is a terminal station cell, judging that the advancing direction of the train is towards the direction of a first station;
and if the cell type of the wireless communication terminal on the train is the middle station cell, judging that the advancing direction of the train is consistent with the former advancing direction.
4. The method of claim 1, wherein the first delay time threshold is greater than a running time after entering the initial station when the cell runs towards the initial station, and less than a sum of the running time after entering the initial station and a parking time at the initial station;
the second delay time threshold is larger than the running time of the cell after entering the terminal station when running towards the terminal station direction, and is smaller than the sum of the running time after entering the terminal station and the parking time at the terminal station.
5. A device for judging the traveling direction of a train in rail transit is characterized by comprising:
the acquisition module is used for acquiring cell information entered by a wireless communication terminal on the train;
the judging module is used for judging the type of the cell according to the cell information, wherein the cell type comprises at least one of a cell of a first sending station, a cell of an intermediate station and a cell of a terminal station;
the determining module is used for determining the advancing direction of the train according to the cell type and the train running state, wherein the train running state comprises the following steps: the train is powered on and started and runs normally;
the determining module is used for determining the following conditions in the normal running state of the train:
if the type of a cell entered by a wireless communication terminal on the train is a cell of a first sending station, starting timing, and when the timing delay time reaches a specified first delay time threshold, judging that the advancing direction of the train is changed to the direction of a terminal station;
if the type of the cell entered by the wireless communication terminal on the train is the terminal station cell, starting timing, and when the timing delay time reaches a specified second delay time threshold, judging that the advancing direction of the train is changed to the direction of the initial station;
and if the cell type of the wireless communication terminal on the train is the middle station cell, judging that the advancing direction of the train is consistent with the former advancing direction.
6. The apparatus of claim 5, wherein the obtaining module, in particular for obtaining cell information, includes address information of a cell; accordingly, the method can be used for solving the problems that,
the judgment module is specifically configured to:
and inquiring a pre-established corresponding relation table of the cell address and the cell type according to the cell address information, and determining the cell type as a cell of the initial station, a cell of the intermediate station or a cell of the terminal station.
7. The apparatus of claim 5 or 6, wherein the determination module is to:
when the train is electrified and started:
if the type of a cell entered by a wireless communication terminal on the train is a cell of a first sending station, judging that the advancing direction of the train is towards the direction of a terminal station;
if the type of a cell entered by a wireless communication terminal on the train is a terminal station cell, judging that the advancing direction of the train is towards the direction of a first station;
and if the cell type of the wireless communication terminal on the train is the middle station cell, judging that the advancing direction of the train is consistent with the former advancing direction.
8. The apparatus of claim 5, wherein the determination module is specifically configured to:
the appointed first delay time threshold is larger than the running time of the cell after entering the initial station when running towards the initial station direction and is smaller than the sum of the running time after entering the initial station and the parking time at the initial station;
the specified second delay time threshold is larger than the running time of the cell after entering the terminal station when running towards the terminal station direction, and is smaller than the sum of the running time after entering the terminal station and the parking time at the terminal station.
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| CN109856595A (en) * | 2018-11-22 | 2019-06-07 | 交控科技股份有限公司 | Rail traffic positioning system and method based on UWB |
| CN113830138B (en) * | 2020-06-23 | 2023-08-15 | 北京新岸线移动通信技术有限公司 | Method and device for judging train travelling direction in rail transit |
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