CN113830138A - 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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- 238000000034 method Methods 0.000 title claims abstract description 56
- 238000004873 anchoring Methods 0.000 claims abstract description 13
- 230000006854 communication Effects 0.000 description 11
- 101100059544 Arabidopsis thaliana CDC5 gene Proteins 0.000 description 10
- 101100244969 Arabidopsis thaliana PRL1 gene Proteins 0.000 description 10
- 102100039558 Galectin-3 Human genes 0.000 description 10
- 101100454448 Homo sapiens LGALS3 gene Proteins 0.000 description 10
- 101150115300 MAC1 gene Proteins 0.000 description 10
- 101150051246 MAC2 gene Proteins 0.000 description 10
- 238000004891 communication Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 4
- 238000012937 correction Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
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- 238000004364 calculation method Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L25/00—Recording or indicating positions or identities of vehicles or trains or setting of track apparatus
- B61L25/02—Indicating or recording positions or identities of vehicles or trains
- B61L25/023—Determination of driving direction of vehicle or train
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0077—Transmission or use of information for re-establishing the radio link of access information of target access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
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Abstract
The invention discloses a method and a device for judging the advancing direction of a train in rail transit, which comprises the following steps: a mobile station on the train is accessed to an anchoring station, and the traveling direction of the train is preliminarily judged according to the type of the anchoring station; when a mobile station on the train accesses a non-anchor station, the traveling direction is kept unchanged; and judging whether the current advancing direction is correct or not in real time according to a post-feedback method. The method provided by the invention can simply and accurately judge the advancing direction of the train without adding a position positioning device, and can save the cost.
Description
Technical Field
The invention belongs to the technical field of rail transit, and particularly relates to a method and a device for judging the traveling direction of a train in the rail transit.
Background
In a wireless communication scene of rail transit, it is very important to a communication Based Train Control system cbtc (communication Based Train Control system) to accurately determine a traveling method of a Train, and currently, determining a traveling direction of a Train may be implemented by a GPS positioning or the like, but this method requires a special GPS function to implement position positioning and determines the traveling direction of the Train according to a change in position, and this method requires an increase in equipment cost, and cannot be used in situations where there is no GPS signal, such as an underground railway, a tunnel, or the like.
Disclosure of Invention
In view of the above, the present invention provides a method and an apparatus for determining a train traveling direction in rail transit, which do not require other hardware units such as a GPS, preliminarily determine the train traveling direction according to the type of an anchor station accessed by a mobile station on the train, determine whether the traveling direction is wrong in real time by comparing the sequence of MAC addresses of two access base stations before and after the train, and correct the traveling direction in time, thereby improving the success rate of system switching.
A method for judging the advancing direction of a train in rail transit comprises the following steps:
a mobile station on the train is accessed to an anchoring station, and the traveling direction of the train is preliminarily judged according to the type of the accessed anchoring station; the anchor station types include: at least one of a starting point base station, a destination base station and a one-way tunnel base station;
in particular, the method comprises the following steps of,
when the type of an anchor station accessed by the mobile station is a starting base station, the traveling direction is towards the direction of a terminal station;
when the type of an anchor station accessed by the mobile station is a terminal station, the traveling direction is towards the direction of a starting station;
in some optional embodiments, the train operation track includes a unidirectional tunnel base station, which can be used as an anchor station in the present invention, when a mobile station on a train accesses the unidirectional tunnel base station, the traveling direction is a unidirectional tunnel direction, and it can be determined through the unidirectional tunnel direction that the traveling direction is toward the terminal station or toward the starting station.
When a mobile station on the train accesses a non-anchor station, the traveling direction is kept unchanged;
the non-anchor station is other base stations except the anchor station in the train track;
and judging whether the current advancing direction is correct or not in real time according to a post-feedback method, wherein the post-feedback method is based on the MAC addresses of all base stations obtained in advance, and the advancing direction of the train is judged by a mobile station on the train according to the sequence of the media access control MAC addresses of the access base stations.
Further, the post-feedback method includes:
the method comprises the steps of obtaining MAC addresses of base stations in a train track in advance;
a mobile station on a train is sequentially accessed to two base stations;
respectively obtaining current base station information of a mobile station accessing the two base stations, wherein the current base station information comprises: the MAC address of the current access base station, the MAC address of the last base station in the adjacent cell information and the MAC address of the next base station in the adjacent cell information;
it should be noted that, when the timing advance of the mobile station accessing the base station is smaller than the preset timing advance threshold, that is, the mobile station accesses the base station tower, the current base station information of the mobile station accessing the base station is obtained and recorded;
the invention limits the access position of the mobile station relative to the base station under the tower so as to ensure that the currently accessed base station is the base station with the strongest access of the mobile station, thereby ensuring that the acquired information of the current base station is effective.
Specifically, a mobile station sequentially accesses a first base station and a second base station, where the first base station and the second base station are adjacent base stations or separated by one base station;
wherein, when the first base station and the second base station are adjacent base stations:
if the MAC address of the current access base station of the first base station is the same as the MAC address of the last base station in the adjacent cell information of the second base station, the traveling direction is from the first base station to the second base station;
if the MAC address of the last base station in the adjacent cell information of the first base station is the same as the MAC address of the current access base station of the second base station, the traveling direction is from the second base station to the first base station;
when the first base station and the second base station are separated by one base station:
if the MAC address of the next base station in the adjacent cell information of the first base station is the same as the MAC address of the previous base station in the adjacent cell information of the second base station, the traveling direction is from the first base station to the second base station;
if the MAC address of the last base station in the adjacent cell information of the first base station is the same as the MAC address of the next base station in the adjacent cell information of the second base station, the traveling direction is from the second base station to the first base station;
and judging whether the train runs towards the starting station or the terminal station according to the position relation of the first base station and the second base station along the track.
The invention also provides a device for judging the traveling direction of the train in the rail transit, which comprises the following components:
the first judging module is used for preliminarily judging the advancing direction of the train according to the type of the accessed anchor station when a mobile station on the train accesses the anchor station; the anchor station types include: at least one of a starting point base station, a destination base station and a one-way tunnel base station;
the first judging module is further used for judging that the train advancing direction is kept unchanged when a mobile station on the train accesses a non-anchor station;
and the second judging module is used for judging whether the current train advancing direction is correct in real time, and judging the train advancing direction according to the front-back sequence of the MAC addresses of the mobile station access base station media access control based on the MAC addresses of the base stations obtained in advance.
The first determination module is specifically configured to,
when a mobile station on a train accesses a starting point base station, judging that the traveling direction is towards the direction of a terminal station;
when a mobile station on a train accesses a terminal station, judging that the traveling direction is towards the direction of a starting station;
when a mobile station on a train accesses a one-way tunnel base station, the traveling direction is determined to be the one-way tunnel direction, and the one-way tunnel direction is to run towards a terminal station or to run towards a starting station.
The second determination module includes:
the comparing unit is used for comparing the timing advance of the mobile station accessing the base station with a preset timing advance threshold, and when the timing advance of the mobile station accessing the base station is determined to be smaller than the preset timing advance threshold, the acquiring unit acquires the current base station information of the mobile station accessing the base station;
an obtaining unit, configured to obtain current base station information of a mobile station accessing a base station, where the current base station information includes: the MAC address of the current access base station, the MAC address of the last base station in the adjacent cell information and the MAC address of the next base station in the adjacent cell information;
the determining unit is used for judging the train advancing direction according to the current base station information of the two base stations;
the determining unit is specifically configured to:
the mobile station is sequentially accessed to a first base station and a second base station which are adjacent base stations,
if the MAC address of the current access base station of the first base station is the same as the MAC address of the last base station in the adjacent cell information of the second base station, the traveling direction is from the first base station to the second base station;
if the MAC address of the last base station in the adjacent cell information of the first base station is the same as the MAC address of the current access base station of the second base station, the traveling direction is from the second base station to the first base station;
and judging whether the train runs towards the starting station or the terminal station according to the position relation of the first base station and the second base station along the track.
The first base station and the second base station are separated by one base station:
if the MAC address of the next base station in the adjacent cell information of the first base station is the same as the MAC address of the previous base station in the adjacent cell information of the second base station, the traveling direction is from the first base station to the second base station;
if the MAC address of the last base station in the adjacent cell information of the first base station is the same as the MAC address of the next base station in the adjacent cell information of the second base station, the traveling direction is from the second base station to the first base station;
and judging whether the train runs towards the starting station or the terminal station according to the position relation of the first base station and the second base station along the track.
The invention achieves the following beneficial technical effects:
1. the method and the device for judging the advancing direction of the train in the rail transit can accurately judge the advancing direction of the train by an anchor station method and a post-feedback method, are simple and convenient to realize, and do not need to increase the equipment cost.
2. The post-feedback judgment method provided by the invention requires that the mobile station is considered to be effective only when the mobile station is connected with the base station tower, and can ensure the effectiveness of network access, thereby ensuring the accuracy of the acquired current base station information and improving the accuracy of the judgment result.
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 train traveling direction in rail transit according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating a train traveling direction determination according to a type of a mobile station access base station according to an embodiment of the present invention;
fig. 3 is a flowchart of a method for determining a train traveling direction by a post-feedback method according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of a device for determining a traveling direction of a train in rail transit according to a third embodiment of the present invention;
fig. 5 is a schematic structural diagram of a second determining module according to a third 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 aiming at the characteristics of the track traffic scene, and can be applied to various scenes in which the running direction of the train in the track traffic needs to be judged.
Example one
The embodiment provides a method for judging the train traveling direction in rail transit, the flow of which is shown in fig. 1, and the method comprises the following steps:
step S1: a mobile station on the train is accessed to an anchoring station, and the traveling direction of the train is preliminarily judged according to the type of the accessed anchoring station;
the anchor station types include: at least one of a starting point base station, a destination base station and a one-way tunnel base station;
the train is characterized in that a starting station and a terminal station are relatively fixed in the running process of the train by combining the characteristics of rail transit, the train runs back and forth between the starting station and the terminal station, and the running direction of the train is towards the terminal station or towards the starting station. Wireless communication base stations arranged along the track cover different areas of the track, and the communication base stations have single Media Access Control (MAC) addresses which can be used for identifying different base stations; the MAC address can be broadcasted at regular time in the wireless communication process, the mobile station obtains the MAC address of each base station arranged along the track in advance, and the mobile station can judge which base station the mobile station accesses when receiving the MAC address in the advancing process of the train;
in the present embodiment, in order to clearly distinguish stations at both ends, a station at one end is referred to as a starting station, and the other end is referred to as a terminal.
Fig. 2 shows a schematic diagram of a method for determining a train traveling direction according to a type of a base station through which a mobile station accesses a network;
exemplarily, 8 wireless communication base stations are arranged along the track: A. b, C, D, E, F, G, H eight base stations, defining A station as starting base station, H station as terminal station, the running direction from A station to H station is running towards terminal station, the running direction from H station to A station is running towards starting station, the A station and H station of terminal station can be used as anchoring station in the invention;
when a mobile station on a train accesses a starting base station A, namely the train passes through the station A, the moving direction is towards the terminal station;
when a mobile station on a train accesses a terminal base station H station, namely the train passes through the H station, the traveling direction is towards the starting station.
In some possible embodiments, the train operation track comprises one-way tunnels, that is, when the train passes through the one-way tunnels, the train can only operate in a single direction and cannot reversely operate; the wireless communication base station arranged in the one-way tunnel can be used as an anchor station in the invention to judge the train advancing direction;
when a mobile station on a train accesses a one-way tunnel base station, the direction of the train is the direction of the one-way tunnel, the one-way tunnel runs towards a terminal station or a starting station, and the running direction of the train can be judged according to the direction of the one-way tunnel.
Step S2: when the mobile station on the train accesses the non-anchor station, the advancing direction of the train is kept unchanged;
the non-anchor stations are all other base stations except the anchor station on the train running track;
exemplarily, a train is electrically operated at an anchor station, and when a mobile station accesses a starting base station A, the train is judged to be operated towards a terminal station; when passing the non-anchor station B, C, D, E, F, G, the train is still moving in the direction of the terminal station;
exemplarily, a train is electrically operated at an anchor station, and when a mobile station accesses a terminal base station H, the train is judged to be operated towards a starting station; the train direction is still traveling in the direction of the origin station when passing the non-anchor station B, C, D, E, F, G.
Step S3: judging whether the current advancing direction is correct in real time according to a post-feedback method, wherein the post-feedback method is used for judging the advancing direction of the train according to the front and back sequence of the MAC address of the mobile station access base station on the basis of the MAC addresses of all base stations obtained in advance;
if the train is not electrified at the anchoring station, meets an emergency or a non-operation time period, and the like, the train may have special conditions of running tracks such as reverse running, turning around, track changing and the like, and at the moment, if the judgment result of the anchoring station is taken as the running direction, an error occurs, so a post-feedback judgment method is needed to carry out real-time inspection on the judgment results of the step S1 and the step S2, and if the judgment of the train direction is wrong, the correction is carried out immediately;
due to the linear characteristic of rail transit and the distance between base stations of several hundred meters, when a mobile station passes through different base stations, the running direction of a train can be determined according to the sequence of the access base stations.
Example two
The embodiment specifically introduces a method for determining a train traveling direction by using a post-feedback method, which includes, as shown in fig. 3:
step S31: a mobile station on a train is sequentially accessed to two base stations;
the two base stations can be adjacent base stations or separated by one base station;
step S32: respectively acquiring current base station information of a mobile station accessing two base stations, wherein the current base station information comprises: the MAC address of the current access base station, the MAC address of the last base station in the adjacent cell information and the MAC address of the next base station in the adjacent cell information;
in order to ensure the validity of access, the post-feedback judgment method requires that the mobile station is considered to be valid only when the mobile station is below a base station tower, namely the real-time timing advance of the mobile station from the base station is less than a preset threshold;
in a wireless communication system, ubiquitous signal interference may cause that a mobile station cannot correctly access a base station to be accessed, and if the MAC address of the base station accessed at any position is used as an effective address to participate in calculating the train direction, a calculation error may be caused. The invention limits the position of the mobile station relative to the base station under the tower, even if interference exists, the signal-to-noise ratio of the mobile station is very large, and the probability of wrong access is very small, so that the effective premise of the feedback judgment method can be ensured that the currently accessed base station is the base station with the strongest access of the mobile station;
when TA of the mobile station accessing the base station is less than TA threshold1That is, when the mobile station is connected to the base station tower, the current base station information is obtained and recorded.
Step S33: the direction of travel is determined from the current base station information of the two base stations.
The MAC address of each base station on the train running track is obtained in advance, and the mobile station can judge which base station is accessed to the network according to the received MAC address of the access base station;
a mobile station is sequentially accessed to a first base station and a second base station, wherein the first base station and the second base station are adjacent base stations or are separated by one base station; the traveling direction of the train can be judged by comparing the current base station information of the first base station and the second base station.
1) The first base station and the second base station are adjacent base stations: the mobile station firstly accesses a first base station and then accesses a second base station;
the current base station information of the first base station includes: MAC address cur _ joined _ MAC1 of the current access base station, MAC address cur _ joined _ last _ MAC1 of the last base station in the neighbor cell information, and MAC address cur _ joined _ next _ MAC1 of the next base station in the neighbor cell information;
the current base station information of the second base station includes: MAC address cur _ joined _ MAC2 of the current access base station, MAC address cur _ joined _ last _ MAC2 of the last base station in the neighbor cell information, and MAC address cur _ joined _ next _ MAC2 of the next base station in the neighbor cell information;
if the MAC address cur _ joined _ MAC1 of the current access base station of the first base station is the same as the MAC address cur _ joined _ last _ MAC2 of the last base station in the adjacent cell information of the second base station, the traveling direction is from the first base station to the second base station;
if the MAC address cur _ joined _ last _ MAC1 of the previous base station in the neighbor cell information of the first base station is the same as the MAC address cur _ joined _ MAC2 of the currently accessed base station of the second base station, the traveling direction is from the second base station to the first base station.
2) The first base station and the second base station are separated by one base station: the mobile station firstly accesses a first base station and then accesses a second base station;
the current base station information of the first base station includes: MAC address cur _ joined _ MAC1 of the current access base station, MAC address cur _ joined _ last _ MAC1 of the last base station in the neighbor cell information, and MAC address cur _ joined _ next _ MAC1 of the next base station in the neighbor cell information;
the current base station information of the second base station includes: MAC address cur _ joined _ MAC2 of the current access base station, MAC address cur _ joined _ last _ MAC2 of the last base station in the neighbor cell information, and MAC address cur _ joined _ next _ MAC2 of the next base station in the neighbor cell information;
if the next base station MAC address cur _ joined _ next _ MAC1 in the adjacent cell information of the first base station is the same as the last base station MAC address cur _ joined _ last _ MAC2 in the adjacent cell information of the second base station, the traveling direction is from the first base station to the second base station;
if the last base station MAC address cur _ joined _ last _ MAC1 in the adjacent cell information of the first base station is the same as the next base station MAC address cur _ joined _ next _ MAC2 in the adjacent cell information of the second base station, the traveling direction is from the second base station to the first base station;
judging whether the train runs towards the starting station or the terminal station according to the position relation of the first base station and the second base station along the track;
exemplarily, the first base station and the second base station are arranged along the track in a direction from the starting station to the end station, and when the determination result is that the train runs from the first base station to the second base station, the train runs in a direction towards the end station; the first base station and the second base station are arranged according to the direction from the terminal station to the starting station, and when the judgment result shows that the train runs from the first base station to the second base station, the train runs in the direction from the starting station.
According to the post-feedback method, when the train passes through two continuous base stations at any time, the train advancing direction is judged, the current advancing direction is checked, and when the post-feedback method judges that the current advancing direction is wrong, correction is carried out immediately;
exemplarily, the mobile station accesses the anchor station a, determines that the traveling direction is toward the terminal station according to the step S31, and when accessing the non-anchor station B, determines that the traveling direction remains unchanged and still moves toward the terminal station in the step S32, at this time, the above result can be checked according to the step S33, and determines the traveling direction of the train according to the sequence of the MAC addresses of the mobile station accessing the anchor station a and the anchor station B, and when determining that the traveling direction of the train is toward the terminal station, that is, the current traveling direction of the train is correct;
when the train continues to access the non-anchor station C, step S32 judges that the traveling direction is kept unchanged and the train still runs towards the terminal station; judging the train advancing direction according to the sequence of the MAC addresses of the mobile station accessing the B station and the C station, and correcting the current advancing direction to be the starting direction when the step S32 judges that the train advancing direction is the running towards the starting direction, namely the current advancing direction is wrong;
therefore, the train continuously passes through the two base stations and is judged by a back feedback method, whether the current advancing direction is correct or not is judged in real time, and correction is carried out.
EXAMPLE III
The embodiment provides a device 300 for judging the traveling direction of a train in rail transit, as shown in fig. 4, comprising:
a first determination module 310, configured to, when a mobile station on a train accesses an anchor station, preliminarily determine a train traveling direction according to a type of the accessed anchor station; the anchor station types include: a starting point base station, a destination base station and a one-way tunnel base station;
the first determining module 310 is further configured to determine that the traveling direction remains unchanged when the mobile station on the train accesses the non-anchor station;
and the second determination module 320 is configured to determine whether the current train traveling direction is correct in real time, and determine the train traveling direction according to a sequence of a mobile station on the train accessing a base station MAC address.
The first determination module 310 is, in particular,
when a mobile station on a train accesses a starting point base station, judging that the traveling direction is towards the direction of a terminal station;
when a mobile station on a train accesses a terminal station, judging that the traveling direction is towards the direction of a starting station;
when a mobile station on a train accesses a one-way tunnel base station, the direction of the train is determined to be the direction of the one-way tunnel, and the one-way tunnel runs towards a terminal station or towards a starting station.
The second determination module 320, as shown in fig. 5, includes:
a comparing unit 321, configured to compare the timing advance of the mobile station accessing the base station with a preset timing advance threshold, and when it is determined that the timing advance of the mobile station accessing the base station is smaller than the preset timing advance threshold, the obtaining unit obtains current base station information of the mobile station accessing the base station;
an obtaining unit 322, configured to obtain current base station information of a mobile station accessing a base station, where the current base station information includes: the MAC address of the current access base station, the MAC address of the last base station in the adjacent cell information and the MAC address of the next base station in the adjacent cell information;
a determining unit 323 configured to determine a traveling direction according to current base station information of the at least two base stations;
the determining unit 323 is specifically configured to:
the mobile station is sequentially accessed to a first base station and a second base station which are adjacent base stations,
if the MAC address of the current access base station of the first base station is the same as the MAC address of the last base station in the adjacent cell information of the second base station, the traveling direction is from the first base station to the second base station;
if the MAC address of the last station base station in the adjacent cell information of the first base station is the same as the MAC address of the current access base station of the second base station, the traveling direction is from the second base station to the first base station; and judging that the train moves towards the starting station or the terminal station according to the geographic positions of the first base station and the second base station.
The determining unit 323 is specifically configured to:
the mobile station is sequentially accessed to a first base station and a second base station, wherein the first base station and the second base station are separated by one base station:
if the MAC address of the next station in the adjacent cell information of the first base station is the same as the MAC address of the previous station in the adjacent cell information of the second base station, the traveling direction is from the first base station to the second base station;
if the MAC address of the last base station in the adjacent cell information of the first base station is the same as the MAC address of the next base station in the adjacent cell information of the second base station, the traveling direction is from the second base station to the first base station;
and judging that the train moves towards the starting station or the terminal station according to the geographic positions of the first base station and the second base 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.
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.
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 (11)
1. A method for judging the advancing direction of a train in rail transit is characterized by comprising the following steps:
a mobile station on the train is accessed to an anchoring station, and the traveling direction of the train is preliminarily judged according to the type of the accessed anchoring station; the anchor station types include: at least one of a starting point base station, a destination base station and a one-way tunnel base station;
when a mobile station on the train accesses a non-anchor station, the traveling direction is kept unchanged;
and judging whether the current advancing direction is correct or not in real time according to a post-feedback method, wherein the post-feedback method is based on pre-obtained Media Access Control (MAC) addresses of all base stations, and a mobile station on the train judges the advancing direction of the train according to the front and back sequence of the MAC addresses of the access base stations.
2. The method for determining the traveling direction of a train according to claim 1,
when the type of an anchor station accessed by the mobile station is a starting base station, the traveling direction is towards the direction of a terminal station;
when the type of an anchor station accessed by the mobile station is a terminal station, the traveling direction is towards the direction of a starting station;
when the type of the anchor station accessed by the mobile station is a unidirectional tunnel base station, the advancing direction is a unidirectional tunnel direction, and the unidirectional tunnel direction runs towards the direction of a terminal station or towards the direction of a starting station.
3. The method of discriminating a traveling direction of a train according to claim 1, wherein the post-feedback method comprises:
pre-obtaining a Media Access Control (MAC) address of each base station;
a mobile station on a train is sequentially accessed to two base stations; the two base stations are adjacent base stations or separated by one base station;
respectively obtaining current base station information of a mobile station accessing the two base stations, wherein the current base station information comprises: the MAC address of the current access base station, the MAC address of the last base station in the adjacent cell information and the MAC address of the next base station in the adjacent cell information;
the direction of travel is determined from the current base station information of the two base stations.
4. The method for determining the traveling direction of a train according to claim 3,
and when the timing advance of the mobile station accessing the base station is smaller than a preset timing advance threshold, namely the mobile station accesses the base station tower, acquiring and recording the current base station information of the mobile station accessing the base station.
5. The method for determining the traveling direction of a train according to claim 3,
the mobile station is sequentially accessed to a first base station and a second base station, and the first base station and the second base station are adjacent base stations:
if the MAC address of the current access base station of the first base station is the same as the MAC address of the last base station in the adjacent cell information of the second base station, the traveling direction is from the first base station to the second base station;
if the MAC address of the last base station in the adjacent cell information of the first base station is the same as the MAC address of the current access base station of the second base station, the traveling direction is from the second base station to the first base station;
and judging whether the train runs towards the starting station or the terminal station according to the position relation of the first base station and the second base station along the track.
6. The method for determining the traveling direction of a train according to claim 3,
the mobile station is sequentially accessed to a first base station and a second base station, and the first base station and the second base station are separated by one base station:
if the MAC address of the next base station in the adjacent cell information of the first base station is the same as the MAC address of the previous base station in the adjacent cell information of the second base station, the traveling direction is from the first base station to the second base station;
if the MAC address of the last base station in the adjacent cell information of the first base station is the same as the MAC address of the next base station in the adjacent cell information of the second base station, the traveling direction is from the second base station to the first base station;
and judging whether the train runs towards the starting station or the terminal station according to the position relation of the first base station and the second base station along the track.
7. A device for judging the traveling direction of a train in rail transit is characterized by comprising:
the first judging module is used for preliminarily judging the advancing direction of the train according to the type of the accessed anchoring station when a mobile station on the train is accessed to the anchoring station; the anchor station types include: at least one of a starting point base station, a destination base station and a one-way tunnel base station;
the first judging module is further used for judging that the train advancing direction is kept unchanged when a mobile station on the train accesses a non-anchor station;
and the second judging module is used for judging whether the current train advancing direction is correct in real time, and judging the train advancing direction according to the front-back sequence of the MAC address of the access base station of the mobile station based on the media access control MAC address of each base station obtained in advance.
8. The apparatus of claim 7, wherein the first determination module is specifically configured to,
when the type of an anchor station accessed by the mobile station is a starting base station, judging that the traveling direction is towards the direction of a terminal station;
when the type of an anchor station accessed by the mobile station is a terminal station, judging that the traveling direction is to run towards the starting station;
and when the type of the anchor station accessed by the mobile station is a unidirectional tunnel base station, judging that the advancing direction is the unidirectional tunnel direction, wherein the unidirectional tunnel direction runs towards the direction of a terminal station or towards the direction of a starting station.
9. The apparatus of claim 7, wherein the second determination module comprises:
the comparing unit is used for comparing the timing advance of the mobile station accessing the base station with a preset timing advance threshold, and when the timing advance of the mobile station accessing the base station is determined to be smaller than the preset timing advance threshold, the acquiring unit acquires the current base station information of the mobile station accessing the base station;
an obtaining unit, configured to obtain current base station information of a mobile station accessing a base station, where the current base station information includes: the MAC address of the current access base station, the MAC address of the last base station in the adjacent cell information and the MAC address of the next base station in the adjacent cell information;
and the determining unit is used for determining the train advancing direction according to the current base station information of the two base stations.
10. The apparatus of claim 9, wherein the determining unit is specifically configured to:
the mobile station is sequentially accessed to a first base station and a second base station which are adjacent base stations,
if the MAC address of the current access base station of the first base station is the same as the MAC address of the last base station in the adjacent cell information of the second base station, the traveling direction is from the first base station to the second base station;
if the MAC address of the last base station in the adjacent cell information of the first base station is the same as the MAC address of the current access base station of the second base station, the traveling direction is from the second base station to the first base station;
and judging whether the train runs towards the starting station or the terminal station according to the position relation of the first base station and the second base station along the track.
11. The apparatus of claim 9, wherein the determining unit is specifically configured to:
the mobile station is sequentially accessed to a first base station and a second base station, wherein the first base station and the second base station are separated by one base station:
if the MAC address of the next base station in the adjacent cell information of the first base station is the same as the MAC address of the previous base station in the adjacent cell information of the second base station, the traveling direction is from the first base station to the second base station;
if the MAC address of the last base station in the adjacent cell information of the first base station is the same as the MAC address of the next base station in the adjacent cell information of the second base station, the traveling direction is from the second base station to the first base station;
and judging whether the train runs towards the starting station or the terminal station according to the position relation of the first base station and the second base station along the track.
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