JP2000168556A - Base station deciding method for moving destination of mobile station and mobile object communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely perform a reservation at a ground side radio device of a moving destination by deciding a base station to which communication is to be performed next by a mobile station mounted on a mobile object moving by a preliminarily fixed route. SOLUTION: At first, an automatic location calculating device 112 calculates a present location of a train 103 and prepares positional information 107 by a method measuring the speed of the train 103 and calculating a moving distance from a station. The prepared positional information is delivered to a train side radio transmission device 111. The train side radio transmission device 111 transmits positional information 107 to a ground side radio transmission device 102a to be a communication opposite party. Next, the ground side radio transmission device 102a receiving positional information delivers positional information 107 to a ground control device 101a controlling the ground side radio transmission device 102a. Next, the ground control device 101a recognizes discriminating information on the train 103 from positional information 107 and the present location of the train 103 and determines a traveling permission location 104 for the train 103.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a technique for determining a destination base station of a mobile station in a mobile communication system used for a mobile moving on a predetermined route.
In a wireless train signal system in a railway security system, the present invention relates to a technology for determining a ground-side wireless device to which communication is to be performed next when a train in communication moves.

[0002]

2. Description of the Related Art In mobile communication, since one base station cannot communicate with all mobile stations, a plurality of base stations are installed to communicate with the mobile stations. Therefore, as the mobile station moves, an operation called handover in which the mobile station switches the base station of the communication destination is required.

As a conventional handover in mobile communication, for example, there is a technique described in Japanese Patent Application Laid-Open No. 9-307943. According to this technique, the strength of a radio wave of a mobile station is detected by an adjacent base station or the like by a movement prediction unit, and a destination base station of the mobile station is predicted. The base station determined to be the destination by the prediction interrupts the communication path between the mobile station and the base station with which the mobile station communicates, sets a conference call, and makes a handover reservation for the mobile station. When the mobile station detects that the radio wave from the base station that is the communication partner has weakened, the mobile station switches the communication destination to the base station that is determined to be the destination (the base station that interrupted the communication channel) by prediction, and performs handover. Complete.

[0004]

By the way, in the conventional handover in mobile communication, the base station to which the mobile station is to move is predicted by detecting the strength of the radio wave of the mobile station at an adjacent base station or the like. . Further, the mobile station detects that the radio wave from the base station as the communication partner has weakened, and switches the communication partner to the base station determined to be the destination by prediction.

However, the strength of the radio wave is easily affected by the environment, and in some cases, the prediction of the destination of the mobile station may be erroneous. Incorrectly predicting the destination of the mobile station,
Since the reservation cannot be made normally, there is a possibility that communication is interrupted by handover, or that the wireless base station is frequently changed in an attempt to switch the communication to the correct base station, resulting in deterioration of communication quality.

[0006] In particular, when the conventional handover in mobile communication is applied to a radio train signal system in a railway security system, the interruption of communication or the deterioration of communication quality may be caused by obstacles in updating the position information of the train or control of the train. Causes a failure in the transmission of information.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to accurately determine a destination base station of a mobile station moving on a predetermined route. More specifically, in the wireless train signal system in the railway security system, by accurately determining the destination ground-side wireless device of the train equipped with the train-side wireless device, it is possible to reliably reserve the destination ground-side wireless device. Is to be able to do.

[0008]

According to the present invention, there is provided a method for determining a destination base station of a mobile station mounted on a mobile unit moving on a predetermined route, comprising:
A mobile station mounted on the mobile unit determines a base station with which the mobile unit should perform next communication based on the current position of the mobile unit and the predetermined route on which the mobile unit moves.

According to the present invention, the mobile station determines the next base station with which communication is to be performed based on the current position of the mobile body and a predetermined route in which the mobile body moves. It is possible to make a more accurate determination. Therefore, a reservation can be reliably made to the destination base station, and thus communication interruption and deterioration of communication quality due to a handover operation due to a destination prediction error can be reduced.

In addition, the present invention applied to a train signal system in a railway security system, according to the present invention, transmits a current position of a train on which the train-side wireless device is transmitted from a train-side wireless device to a plurality of ground-side installed on the ground. The current position of the received train, the current position of the other train, and the open state of the course ahead of the train are received by the ground side wireless device communicating with the train side wireless device among the wireless devices. Based on the above, the travel permission position which is the farthest point on the track where the train is permitted to travel is calculated, and the calculated travel permission position is calculated via the ground side radio device communicating with the train side radio device. A method of determining a destination ground-side wireless device of a train-side wireless device used in a train signal system that transmits to the train-side wireless device, wherein the train-side wireless device is mounted on the train from a travel-permitted position of the train. And judging the ground side wireless device to be next communication said train-side wireless device.

More specifically, a handover point, which is a position on a track at which the train-side wireless device changes the ground-side wireless device with which the train-side wireless device communicates, is predetermined between the ground-side wireless devices having adjacent communication areas. In advance, the traveling permission position of the train is set between the ground-side wireless device communicating with the train-side wireless device mounted on the train and the communication area between the ground-side wireless device adjacent to the ground-side wireless device. At a position farther from the current position of the train than the handover point set at (or may include on the handover point)
, The ground-side wireless device including the train-permitted position in the communication area is determined as the ground-side wireless device with which the train-side wireless device mounted on the train should communicate next.

When the present invention is applied to a train signal system in a railway security system, the ground-side wireless device with which the train-side wireless device should communicate next has the train-side wireless device calculated as railway security information. The determination is made by comparing the train travel permitted position with a handover point, which is a position on the track at which the train-side wireless device changes the ground-side wireless device as the communication partner. For this reason, it is possible to more accurately determine the destination ground-side wireless device. Therefore, the reservation can be reliably made to the destination terrestrial-side wireless device, so that communication interruption and deterioration of communication quality due to a handover operation due to a prediction error of the destination can be reduced.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below.

FIG. 1 is a schematic configuration diagram of an entire train signal system in a railway security system to which an embodiment of the present invention is applied.

As shown in the figure, a train signal system to which the present embodiment is applied includes a train-side wireless transmission device 111 and an own-vehicle position calculating device 112 mounted on a train 103 running on a track, and a train-side wireless transmission device. Ground-side wireless transmission devices 102a to 102c installed in different communication areas (control ranges) so that wireless communication with the device 111 can be performed.
(Hereinafter, also simply referred to as “terrestrial-side wireless transmission device 102”)
And ground control devices 101a to 101c (hereinafter, also simply referred to as ground control device 101) for controlling the ground-side wireless transmission devices 102a to 102c, respectively, and a point connected to the ground control device 101 via a communication network. And a station interlocking device 109 for collecting information such as the direction of the vessel and the opening status of the route (the state of the traffic light).

Although FIG. 1 shows three terrestrial-side wireless transmission devices 102 and three terrestrial control devices 101, it is needless to say that the numbers are not limited to these numbers.

In the train signal system having the above configuration, first, the vehicle position calculating device 112 calculates the current position of the train 103 by a method such as measuring the speed of the train 103 and calculating the travel distance from the station. Then, position information 107 which is information indicating the current position of the train 103 is created. Then, the created position information 107 is passed to the train-side wireless transmission device 111. In response to this, the train-side wireless transmission device 111 transmits the received position information 107 to the ground-side wireless transmission device 102 (102a in the example shown in FIG. 1), which is the communication partner.

Next, the terrestrial-side wireless transmission device 102 that has received the position information 107 transmits the position information 107 to the terrestrial control device 101 that controls the terrestrial-side wireless transmission device 102.
(101a in the example shown in FIG. 1).

Next, the ground control device 101 that has received the position information 107 recognizes the identification information of the train 103 and the current position from the position information 107 and determines the travel permission position 104 for the train 103. Here, the traveling permission position is the farthest point on the track where the train is permitted to travel, that is, on the track where the train can travel safely without colliding with another train or derailing. Is the limit of The travel permission position has been conventionally used for automatic control of a train in a railway security system, and a method of determining the position will be briefly described.

The ground control device 101 receives the current position of the train recognized from the position information received from the ground-side wireless transmission device 102 under control, the current position of the train received from another ground control device 101, and the like. It stores the linear data of the track on which the train travels, and the information received from the station interlocking device 109, such as the opening status of the route and the direction of the switch, and uses these information to control the ground under control. For the train recognized from the position information received from the side wireless transmission device 102, the state of the track ahead of the train is checked, and a search is made until a train hindrance such as an unopened track end or a preceding train is found. If there is a branch, it is determined which of the branch destinations should be searched from the direction of the switch. The position of the obstacle found as a result of the search is set as the traveling permission position.

The terrestrial control device 101 receives the position information 1 received from the terrestrial-side wireless transmission device 102 under control.
07, the travel permission position 104 of the train 103 recognized is determined.
3 is generated, and the control information 106 is used to control the traveling of the terrestrial-side wireless transmission device 102 under control.
Pass to.

Next, the terrestrial-side wireless transmission device 102 that has received the control information 106 transmits the control information 106 to the train 1
The data is transmitted to the train-side wireless transmission device 111 mounted on the vehicle.

As described above, the travel permission position 104 is
It is determined by referring to information such as the opening status of the route and the direction of the switch. For this reason, the traveling permission position 104 corresponds to the train 1
03 indicates the direction in which the vehicle is to travel. Therefore,
In the present embodiment, in the ground control device 101, based on the travel permission position 104, the train-side wireless transmission device 111 mounted on the train 103 communicates with the ground-side wireless transmission device 102 to be communicated next, that is, The terrestrial-side wireless transmission device 102 is determined.

The ground control device 101 is provided between the ground-side wireless transmission devices 102 whose communication areas are adjacent to each other. The handover points 105a to 105c, which are the positions, are stored, and the traveling permission position 104 of the train 103 is determined by the terrestrial-side wireless transmission device 102 and the communication area that are communicating with the train-side wireless transmission device 111 mounted on the train 103. The ground-side wireless transmission device 10
It is checked whether the train 103 is located on a handover point set between the wireless communication apparatus 2 and the adjacent terrestrial-side wireless transmission apparatus 102 or at a position farther from the current position of the train 103 than the handover point. In the example shown in FIG. 1, the ground control device 101a checks whether the travel permission position 104 of the train 103 is on the handover point 105b or at a position farther from the current position of the train 103 than the handover point 105b.

When the traveling permission position 104 of the train 103 is located at the above-mentioned handover point or at a position farther from the current position of the train 103 than the above-mentioned handover point, the train 103 travels beyond the above-mentioned handover point. Therefore, the ground-side wireless transmission device 102 including the travel permission position 104 of the train 103 in the communication area is changed to the train 1
The train-side wireless transmission device 111 mounted on the wireless communication device 03 is determined to be the ground-side wireless transmission device 102 with which communication is to be performed next. FIG.
In the example shown in FIG. 1, the ground-side wireless transmission device 102b
The train-side wireless transmission device 111 mounted on the station 03 is determined as the ground-side wireless transmission device 102 with which communication is to be performed next.

Next, the ground control device 101
The train-side wireless transmission device 111 mounted on the base station communicates with the train-side wireless transmission device 111 to the ground-side control device 101 that controls the ground-side wireless transmission device 102 that is determined to perform communication next. Wireless channel reservation request 108 is transmitted. In the example illustrated in FIG. 1, the ground control device 101a transmits a wireless channel reservation request 108 for communicating with the train side wireless transmission device 111 to the ground control device 101b.

Next, upon receiving a notification that the reservation has been made from the ground control device 101 which has requested the reservation of the radio channel, the ground control device 101 transmits the information of the reserved radio channel to the terrestrial under control. It transmits to the train side wireless transmission device 111 via the side wireless transmission device 101. In response to this, when the train 103 reaches the communication area of the terrestrial-side wireless transmission device 102 that is determined to perform communication next, the train-side wireless transmission device 111 uses the reserved wireless channel to The communication with the ground-side wireless transmission device 102 is performed. In the example shown in FIG. 1, the current position of the train 103 calculated by the own-vehicle position calculating device 112 is the handover point 105.
When the number exceeds b, the train-side wireless transmission device 111 switches the communication partner from the ground-side wireless transmission device 102a to the ground-side wireless transmission device 102b.

Note that the ground control device 101 determines that the running permission position of the train 103 determined based on the current position of the train 103 newly transmitted from the train side radio transmission device 111 is the train mounted on the train 103. Side wireless transmission device 1
When the mobile terminal 11 moves to a position closer to the current position of the train 103 than a handover point set between the ground-side wireless transmission device 102 communicating with the wireless communication device 11 and the ground-side wireless transmission device 102 that has reserved the wireless channel, A reservation cancellation request 113 is transmitted to the terrestrial-side control device 101 that controls the terrestrial-side wireless transmission device 102 that has reserved the channel, and the fact is transmitted via the terrestrial-side wireless transmission device 101 under control. , To the train-side wireless transmission device 111.

As described above, in the present embodiment, by referring to the travel permission position used for the automatic control of the train in the railway security system, the ground-side wireless transmission device 102 to which the train 103 moves can be accurately determined. , And the reservation of the wireless channel can be performed. In addition, when the travel permitted position is moved and the schedule is changed, it is possible to cancel the reservation request.

Next, the ground control device 101, which is a main component of the train signal system of the embodiment described above, will be described in detail. The other configurations are the same as those conventionally used in the wireless train signal system in the railway security system, and thus detailed description thereof will be omitted.

FIG. 2 is a schematic block diagram of the ground control device 101 shown in FIG.

As shown, the ground control device 101
Ground-side wireless transmission device communication unit 201, station interlocking device communication unit 209, ground control device communication unit 207, train tracking unit 202, travel permitted position calculation unit 203, control information creation unit 208, handover point It comprises a storage medium 205, a destination determination unit 204, and a reservation request unit 206.

The terrestrial-side wireless transmission device communication section 201 transmits the position information 107 from the terrestrial-side wireless transmission device 102 under control.
And passes it to the train tracking unit 202. Also, the control information 106 created by the control information creation unit 208 described later, the wireless channel reservation request received by the ground control unit communication unit 101, and the cancellation request of the reservation are transmitted to the terrestrial-side wireless transmission device 102 under control. Pass to.

The train tracking unit 202 has, as a database, the current position of each train equipped with the train-side wireless transmission device 111 communicating with the ground-side wireless transmission device 102 under control. When the position information is received from the transmission device communication unit 201, the identification information and the current position of the train are recognized from the information, and the current position of the train on the database is updated.

The station interlocking device communication unit 209 has information such as the opening status of the route and the direction of the switch as a database.
09, and receives information such as the route opening status and the direction of the switch, and updates the database.

The inter-ground-control-device communication unit 207 has, as a database, the current position of each train equipped with the train-side wireless transmission device 111 communicating with the ground-side wireless device 102 under the control of the other ground control device 101. And a certain period,
For example, it communicates with the other ground control device 101 in a one-second cycle, acquires the current position of each train, and updates the database. The ground control unit communication unit 207 transmits a wireless channel reservation request or a reservation cancellation request created by the reservation request unit 206 to be described later to another ground control device 101 or transmitted from another ground control device 101. It receives a request for reservation or cancellation of reservation of the received wireless channel.

The permitted travel position calculating section 203 has linear data of the track, and the linear data and the train tracking section 2 are used.
02, the current position of each train in the database of the inter-ground control device communication unit 207, the current status of the route in the database of the station interlocking device communication unit 209, and the rolling state. Using the information such as the direction of the container, the travel permitted position of each train in the database of the train tracking unit 202 is determined in the manner described above.

The control information creating unit 208 includes, for each of the trains for which the permitted travel position determined by the permitted travel position calculation unit 203 has been determined, the information for controlling the travel of the train, including the permitted travel position of the train. Is generated.

The handover point storage medium 205 is the ground control device 10 having the handover point storage medium 205.
1 and a ground-side wireless transmission device 102 with which a train-side wireless transmission device 111 is a communication partner between the ground-side wireless transmission device 102 and a ground-side wireless transmission device 102 whose communication area is adjacent to the ground-side wireless transmission device 102. Points on the track to change the handover points 105a to 105c and the terrestrial-side wireless transmission device 102 beyond the handover points 105a to 105c, ie, the handover points 105a to 105c
5c, the terrestrial-side wireless transmission device 102 controlled by the terrestrial control device 101 having the handover point storage medium 205 and the communication area (control range) of the adjacent terrestrial-side wireless transmission device 102 are stored in association with each other. are doing.

The destination determining unit 204 refers to the train running permitted position determined by the running permitted position calculating unit 203 and the handover point stored in the handover point storage medium 205 to move the train side wireless transmission device 111. The terrestrial-side wireless transmission device 102 is determined.

The reservation requesting unit 206 includes a destination determining unit 204
A reservation request for a wireless channel is created for the terrestrial-side wireless transmission device 102 determined as the destination. In addition, when the travel permitted position moves and the destination-side determination unit 204 removes the terrestrial-side wireless transmission device 102 once determined as the destination from the destination, the operation is performed on the terrestrial-side wireless transmission device 102. Create a request to cancel the reservation of the reserved wireless channel. Further, the reservation request unit 206 includes a communication unit 207 between the ground control devices.
The wireless channel reservation request and the wireless channel reservation cancel request received in step S1 are passed to the terrestrial-side wireless transmission device communication unit 201.

Next, the operation of the ground control device 101 having the above configuration will be described. FIG. 3 is a flowchart for explaining the operation of the ground control device 101 shown in FIG.

First, the terrestrial-side wireless transmission device communication unit 201
From the ground-side wireless transmission device 102 under control to the train 103
Receiving the location information 107 of the train tracking unit 20
Hand over to 2. The train tracking unit 202 recognizes the identification information and the current position of the train 103 from the position information 107, and updates the current position of the train 103 on the database (Step 301).

Next, the permitted travel position calculation unit 203 calculates the current position of each train stored in the database of the train tracking unit 202 and the current position of each train stored in the database of the ground control unit communication unit 207. , Station interlocking device communication unit 20
9 to obtain information such as the path opening status and the direction of the switch. Then, using the obtained information and the linear data of the track stored in advance in the permitted travel position calculation unit 203, the permitted travel position of the train 103 whose current position is updated in step 301 is determined (step 302). .

That is, with respect to the train 103, the state of the track ahead (in the traveling direction) of the current position of the train 103 is examined, and until a train obstruction such as an unopened track end or a preceding train is found. Search for. If there is a branch, it is determined which of the branch destinations should be searched from the direction of the switch. The position of the obstacle found as a result of the search is set as the travel permission position 104 of the train 103.

Next, the destination determining unit 204 determines the handover point 105 stored in the handover point storage medium 205.
a to 105c are read, and the positional relationship between the train 103 and the travel permission position 104 determined in step 302 is checked (step 303).

Next, the destination determination unit 204 determines the handover point 105 stored in the handover point storage medium 205.
For each of a to 105c, based on the positional relationship with the travel permission position 104 of the train 103 examined in step 303, the train
It is checked whether there is a handover point on the current location side of the train 103 above the travel permission position 104 of the train 103 or the travel permission position 104 of the train 103. In other words,
It is checked whether or not the travel permission position 104 of the train 103 has a handover point in a positional relationship above or beyond the handover point and apart from the current position of the train 103 (step 304).

When there is a handover point having such a positional relationship, the ground-side wireless transmission device 102 controlled by the ground control device 101 and the ground-side wireless transmission device 102 adjacent to the handover point are interposed. Train 103
It is checked whether or not a wireless channel has been reserved (step 305). If not, the identification information of the ground control device 101 controlling the adjacent ground-side wireless transmission device 102 and the train The identification information 103 is passed to the reservation request unit 206 to instruct creation of a wireless channel reservation request.

On the other hand, if there is no handover point having such a positional relationship, it is checked whether or not a wireless channel has been reserved for the train 103 (step 308). Ground control device 1 that controls the ground-side wireless transmission device 102 in which the reservation is made.
The identification information of the train 103 and the identification information of the train 103 are passed to the reservation requesting unit 206 to instruct creation of a wireless channel reservation cancellation request.

Next, when the reservation request unit 206 receives an instruction to create a reservation request for a wireless channel from the destination determination unit 204, the reservation request unit 206 sends the request to the ground control device 101 specified by the identification information received from the destination determination unit 204. On the other hand, a wireless channel reservation request 108 for the train 103 is created (step 306). Communication unit 207 between ground control devices
Is a wireless channel reservation request 1 from the reservation request unit 206.
08, the ground control device 10
1 (step 307).

In response to this, the ground controller 10 receiving the wireless channel reservation request 108 for the train 103
1 checks the availability of the wireless channel of the ground-side wireless transmission device 102 under control via the ground-side wireless transmission device communication unit 201, and if there is an availability, the wireless channel is assigned to the train mounted on the train 103. The channel is allocated to a channel for performing communication with the side wireless transmission device 111, and the fact is notified to the ground-side control device 101 that has transmitted the reservation request.

On the other hand, when the reservation request unit 206 receives an instruction to create a wireless channel reservation cancellation request from the destination determination unit 204, the reservation request unit 206 sends the request to the ground control device 101 specified by the identification information received from the destination determination unit 204. On the other hand, a reservation cancellation request 113 for the wireless channel for the train 103 is created (step 309). Upon receiving the wireless channel reservation cancellation request 113 from the reservation requesting unit 206, the inter-ground-control-unit communication unit 207 transmits this to the target ground control unit 101 (step 31).
0).

Receiving the request, the ground controller 101 receiving the wireless channel reservation cancellation request 113 for the train 103 transmits via the ground wireless transmitter communication unit 201 the ground wireless transmitter 102 under control. The wireless channel reservation status is checked, and the wireless channel allocated to communicate with the train-side wireless transmission device 111 mounted on the train 103 is released.

Next, the control information creation unit 208
Then, control information 106 that includes the travel permission position 104 of No. 3 and controls the train 103 is created and passed to the ground-side wireless transmission device communication unit 201 (step 311). Here, when the reservation of the wireless channel for the train 103 is performed, the control information 106 is created including the information of the wireless channel. If the reservation of the wireless channel for the train 103 has been canceled, the control information 106 is created including information to that effect.

Next, the terrestrial-side wireless transmission device communication unit 201
Transmits the control information 106 of the train 103 received from the control information creating unit 208 to the terrestrial-side wireless transmission device 1 under control.
02 (step 312). In response, the terrestrial-side wireless transmission device 102 transmits the control information 106 to the train 10
3 is transmitted to the train-side wireless transmission device 111 mounted on the vehicle.

Next, the processing in steps 303 and 304 of the flow shown in FIG. 3 will be described in more detail. FIG. 4 shows steps 303 and 30 of the flow shown in FIG.
FIG. 9 is a flowchart for explaining the process in Step 4;

First, the destination determining unit 204 determines whether the train 103
The ground-side wireless transmission device 102 with which the train-side transmission device 111 mounted on the vehicle is communicating, that is, the destination determination unit 2
The communication area (control range) of the terrestrial-side wireless transmission device 102 controlled by the terrestrial-side control device 101 provided with the terminal 04 is extracted from the handover point storage medium 205 (step 40).
1).

Next, the destination determining unit 204 determines the permitted travel position 104 of the train 103 determined in step 303 of FIG.
Checks whether or not it is within the communication area extracted at step 401 or outside the communication area (step 40).
2) If it is within the communication area, it is determined that the travel permission position 104 of the train 103 does not exceed the handover point (step 403), and steps 308 to 31 in FIG.
0 (step 411), then step 3 in FIG.
Move to 11. However, in step 402, it is determined that the boundary of the communication area is outside the communication area.

In step 402, the travel permission position 104 of the train 103 determined in step 303 of FIG.
If it is determined in step 401 that it is out of the communication area extracted, the destination determination unit 204 determines the handover points 105 a to 105 a stored in the handover point storage medium 205.
The information of the handover point stored at the head is searched from the information of 105c (step 404).

Next, the destination determining unit 204 extracts the information of the communication area of the terrestrial-side wireless transmission device located beyond the read handover point (step 405), and the running of the train 103 determined in step 303 of FIG. Permitted position 104
Checks whether it is within the extracted communication area or outside the communication area (step 406). If it is within the communication area, it is determined that the travel permission position 104 of the train 103 is beyond the read handover point (step 407), and after executing steps 305 to 307 of FIG. 3 (step 412), The process moves to step 311 in FIG. However, in step 406, it is determined that the boundary of the communication area is within the communication area.

In step 406, the travel permission position 104 of the train 103 determined in step 303 of FIG.
If it is determined in step 405 that it is out of the communication area extracted, the destination determination unit 204 determines the handover points 105 a to 105 a stored in the handover point storage medium 205.
It is checked whether there is any information which has not been referred to yet among the information of 105c (step 408). If there is, the information is searched (step 410) and the process returns to step 405. On the other hand, if there is not, the travel permission position 1 of the train 103
04 is the train-side wireless transmission device 1 mounted on the train 103
11 is outside the communication area of the terrestrial-side wireless transmission device 102 with which the handover points 105a to 105a are stored in the handover point storage medium 205.
5c is not exceeded. In this case, it is determined that there is an error in the travel permission position 104 of the train 103 or the data stored in the handover point storage medium 205, and an error is output (step 409).

Next, a description will be given of a format of a wireless channel reservation request / reservation cancel request transmitted from the ground control apparatus 101 to another ground control apparatus 101.

FIG. 5 is a diagram for explaining an example of the format of a wireless channel reservation request 108 transmitted from the inter-ground-control-device communication unit 207.

As shown in the figure, the reservation request 108 includes the identification information (ID) of the destination ground control device 101, the identification information (ID) of the transmission source ground control device 101, and the train to be reserved for the radio channel. It consists of identification information (ID) of the side wireless transmission device 111 and information indicating the type of a reservation request or a reservation cancellation request. As described above, the reservation request unit 206
Receives the identification information of the destination terrestrial-side wireless transmission device 102, the identification information of the train, and the type of the reservation request or the reservation cancellation request from the destination determination unit 204, and determines the reservation request 108 based on these information. Or reservation cancellation request 11
Create 3.

The format in the case where the ground control apparatus 101 which has received the reservation request 108 notifies the ground control apparatus 101 which has transmitted the reservation request 108 of the reserved radio channel is also the same as that shown in FIG. Configuration. In this case, the information of the type may include the information of the reserved wireless channel.

Next, the linear data of the track held by the permitted travel position calculating section 203 and the information of the handover point stored in the handover point storage medium 205 will be described.

FIG. 6 is a diagram schematically showing the relationship between the line alignment, the handover point, and the communication area (control range) of the local radio transmission apparatus 102. Here, attention is paid to the linear data of the track held by the traveling permission position calculation unit 203 of the ground control device 101a, and the relationship between the handover point stored in the handover point storage medium 205 and the communication area of the upper wireless transmission device 102 in each place. Is shown.

First, the linear data of the track held by the permitted travel position calculating section 203 will be described. Ground control device 1
01a is the ground control device 1
01a is controlled by the communication area of the terrestrial radio transmission apparatus 102a and the communication area of each of the terrestrial radio transmission apparatuses 102b and 102c adjacent to the terrestrial radio transmission apparatus 102a. The installed switches, traffic lights, etc. are stored as linear data. According to the example shown in FIG. 6, linear data is stored for each of the up line (line section 1) and the down line (line section 2). As described above, the travel permission position calculation unit 203 calculates the current position of each train stored in the database of the train tracking unit 202, the current position of each train stored in the database of the ground control unit communication unit 207, and A train that seeks to obtain a travel permission position by expanding the track opening status and the direction of the point of the track stored in the database of the station interlocking device communication unit 209 on the track specified by the stored linear data. By checking the state of the track ahead (in the direction of travel) from the current position of the train, and searching until an obstacle that hinders the running of the train, such as an unopened track edge or a preceding train, is found, the permitted travel position of the train is determined. decide.

Next, information on the handover point stored in the handover point storage medium 205 will be described. As described above, the handover point storage medium 205 of the ground control device 101a is
A handover point set at the boundary between the communication area of the terrestrial radio transmission device 102a controlled by the terrestrial radio transmission device 102a and the communication area of the terrestrial radio transmission device adjacent to the terrestrial radio transmission device 102a; The transmission device, that is, the communication area of the adjacent terrestrial-side wireless transmission device via the handover point and the communication area of the adjacent terrestrial-side wireless transmission device are stored in association with each other.

FIG. 7 is a diagram for explaining an example of the data structure of the handover point storage medium 205 provided in the ground control apparatus 101a.

As shown in the figure, the handover point storage medium 205 stores, for each handover point, a position of the handover point and identification information (ID) of the terrestrial-side wireless transmission device 102 located ahead of the handover point. , The control range (communication area) of the terrestrial-side wireless transmission device and the identification information of the terrestrial control device connected to the terrestrial-side wireless transmission device (for each upper-side wireless transmission device) ID) are stored as a set. Here, the control range may be represented by, for example, a starting kilometer and a ending kilometer for each line section.

As described above, the destination determination unit 204 of the ground control unit 101a reads out the information of the handover point from the table 114, and reads out the control range of the ground-side wireless transmission device included in the read out information from the table 115. The process of checking whether or not the travel permitted position of the train determined by the permitted travel position calculation unit 203 is within the read control range is sequentially performed on the handover points stored in the table 114. Then, the destination ground-side wireless transmission device is determined.

The embodiment of the present invention has been described above.

According to the present embodiment, the train-side wireless transmission device mounted on the train is checked by checking whether or not the travel permission position of the train is on the handover point or beyond the handover point. Then, it is possible to accurately determine the terrestrial-side wireless transmission device to be moved next.
Therefore, it is possible to efficiently reserve a wireless channel, and it is possible to prevent interruption of communication and deterioration of communication quality due to a handover operation.

More specifically, the travel permission position of the train is calculated in consideration of the opening state of the route and the direction of the point machine, and thus is calculated only in the traveling direction of the train. For example, FIG.
As shown in FIG. 7, when the train 103 proceeds to the branch destination, the travel permission position 104 is calculated only at the branch destination to which the train 103 goes. Therefore, by referring to the travel permission position 104, it is possible to accurately determine to which of the branch destinations the train 103 travels. After the train 103 approaches the handover point 105b,
When the vehicle turns back in the reverse direction without exceeding the handover point 105b, the route exceeding the handover point 105b is not opened, so that the traveling permission position 104 is not calculated at a position exceeding the handover point 105b. For this reason, it is possible to increase the use efficiency of the wireless channel without making useless reservation of the wireless channel.

The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the invention.

For example, in the above embodiment, the ground control device 101 is constituted by one device as shown in FIG. 2, but it may be constituted by two devices as shown in FIG. Good. That is, the security ground control device 801 fetches information such as the opening status of the route and the direction of the switch from the station interlocking device 109, determines the travel permission position that guarantees the safety of the train 103, and sets the control information. 106, and the information ground control device 802 communicates with the controlled ground-side wireless transmission device 102, communicates with another ground control device 101, and the train-side wireless transmission device mounted on the train 103. The 111 may determine the terrestrial-side wireless transmission device 102 with which communication is to be performed next.

As described above, by dividing the ground control device 101 into two devices according to the purpose, the load on each device can be reduced, and the reliability of the entire system can be improved. In particular, the determination of the permitted travel position is important for ensuring the safety of traveling of the train, and high reliability is required. Therefore, as shown in FIG.
Is divided into two, a security ground control device 801 and an information ground control device 802, and the security ground control device 801 is multiplexed into an operation system and a quasi-use system, whereby reliability can be improved. In addition, about each block which comprises the ground control apparatus 101 shown in FIG. 8, what attaches | subjects the same code | symbol as what is shown in FIG. 2 has the same function.

In FIG. 8, the destination determining unit 204a
The permitted travel position calculated by the permitted travel position calculation unit 203 cannot be directly referred to. Therefore, the destination determining unit 20
4a is the control information 10 created by the control information creation unit 208.
6 is transmitted to the terrestrial-side wireless transmission device 102 under control via the terrestrial-side wireless transmission device communication unit 201, the traveling permission position is extracted with reference to the contents of the control information 106.
The operation after taking out the traveling permission position is basically the same as that of the above-described embodiment, and the description thereof will be omitted. However, the necessity of reservation of a wireless channel arises depending on the taken-out traveling permission position, and when the reservation of the wireless channel is performed, the destination determining unit 204a determines whether the other ground control device 101
The information on the reserved wireless channel received from the terrestrial-side wireless transmission device communication unit 201 is included in the control information 106.
Pass to. If it is necessary to cancel the reservation of the wireless channel due to the extracted traveling permission position, the fact is included in the control information 106 and the ground-side wireless transmission device communication unit 2 is notified.
Pass it to 01.

As described above, the ground control device 101 is provided with the security ground control device 801 which determines the permitted travel position by taking the route opening information and the like from the station interlocking device 109, and the ground side radio transmission device to which the train moves. In the case where the information processing apparatus is divided into the information ground control device 802 and the information ground control device 802 for determining the train 102, the ground-side wireless transmission device 102 to which the train moves is determined by using information such as the path opening status and the direction of the switch. Then, a protocol for transmitting such information to the information ground control device 802 is required. However, in the present embodiment, the ground-side wireless transmission device 102 at the destination of the train
The information required by the security ground control device 801 to determine is only the travel permission position included in the control information 106. For this reason, a communication protocol for transmitting information necessary for determining the ground-side wireless transmission device 102 to which the train has moved from the security ground control device 801 to the information ground control device 802 is separately prepared. Without
The ground controller 101 can be configured.

Further, in the above embodiment, the train-side wireless transmission device 111 determines the ground-side wireless transmission device 102 to which the next communication is to be made by the ground control device 101. It is not limited. For example, as shown in FIG. 9, the determination of the ground-side wireless transmission device 102 to which the train-side wireless transmission device 111 is to communicate next is performed by the ground-side wireless transmission device communicating with the train-side wireless transmission device 111. The processing may be performed at 102.

In the example shown in FIG.
b, the handover point storage medium 205 and the reservation request unit 206 are provided in the terrestrial-side wireless transmission device 102, unlike the terrestrial control device 101 shown in FIG. Note that, with respect to each block constituting the ground control device 101 and the ground-side wireless transmission device 102 shown in FIG. 9, those having the same reference numerals as those shown in FIG. 2 have the same functions.

In FIG. 9, the destination determining unit 204b
Refer to the travel permission position 104 included in the control information 106 transmitted from the ground control device 101 that controls the ground-side wireless transmission device 102 to the ground-side wireless transmission device 102 including the destination determination unit 204b. Thus, in the same manner as in the above embodiment, the ground-side wireless transmission device 102 to which the train moves is determined. Then, the determination result is passed to the reservation request unit 206.

The reservation request section 206 creates a request for reservation of a wireless channel or a request for canceling a reservation in accordance with the above determination result, and sends the request to the terrestrial-side wireless transmission device 1 via the communication network.
02, a communication unit 901 between the ground-side wireless transmission devices for performing communication between the communication devices 02
Thus, the transmission request is transmitted to the terrestrial-side wireless transmission device 102 that is the transmission destination of the reservation request or reservation cancellation request of the wireless channel. Then, via the communication unit 901 between the terrestrial-side wireless transmission devices, a reply is received from the terrestrial-side wireless transmission device 102 to which the reservation request or the reservation cancellation request is transmitted.

When the reservation requesting unit 206 has reserved a wireless channel, the destination determining unit 204b stores the information of the reserved wireless channel received from the terrestrial-side wireless transmission device 102 of the reservation destination in the control information 106. Handover to the wireless controller 902. When the reservation of the wireless channel is canceled, the fact is included in the control information 106 and passed to the wireless control device 902.

Radio control device 902 transmits position information 107 received from train side radio transmission device 111 during communication to ground control device 101. In addition, the destination determination unit 204
The control information 106 received from b is transmitted to the train side wireless transmission device 111.

By doing so, the handover process can be performed only by the terrestrial-side radio transmission device 102. As a result, the functions of each device can be clearly distinguished, such that the ground control device 101 controls only the running of the train and the ground-side wireless transmission device 102 controls only the communication with the train. And distribute the load,
The configuration of the system can be made simpler.

In this embodiment, a case has been described in which the present invention is applied to a train signal system in a railway security system. However, the present invention is mounted on a moving body in which a mobile station moves on a predetermined route, for example, a route bus. Widely applicable to mobile communication systems. In this case, a mobile station (vehicle-side wireless transmission device) mounted on the route bus is used as a destination of the next communication with the route bus based on the current position of the route bus and a predetermined route instead of the travel permission position. The base station (terrestrial-side wireless transmission device) may be determined. Also,
Based on the traffic congestion status and the like obtained from the traffic information, the route bus predicts the time to reach the communication area of the destination base station to be communicated next, that is, the time to reach the handover point. , According to the predictions,
Next, it may be determined whether or not to reserve a wireless channel to a destination base station to communicate with.

[0089]

As described above, according to the present invention,
According to the above configuration, the mobile station can accurately determine the base station with which to communicate next, so that the reservation can be reliably made to the destination base station, and therefore, the prediction of the destination depends on the prediction error. Disruption of communication and deterioration of communication quality in the handover operation can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an entire train signal system in a railway security system to which an embodiment of the present invention is applied.

FIG. 2 is a schematic block diagram of the ground control device 101 shown in FIG.

FIG. 3 is a flowchart for explaining the operation of the ground control device 101 shown in FIG. 2;

FIG. 4 is a flowchart for explaining processing in steps 303 and 304 of the flow shown in FIG. 3;

FIG. 5 is a diagram illustrating a format example of a wireless channel reservation request transmitted from the ground control device communication unit 207;

FIG. 6 is a diagram schematically illustrating a relationship between a line alignment, a handover point, and a communication area (control range) of each upper wireless transmission apparatus 102.

FIG. 7 is a diagram for explaining an example of a data structure of a handover point storage medium 205 provided in the ground control device 101.

FIG. 8 is a schematic block diagram of a ground control device 101 according to a modification of the embodiment of the present invention.

FIG. 9 is a schematic block diagram of a terrestrial control device 101 and a terrestrial-side wireless transmission device 102 according to a modification of the embodiment of the present invention.

[Explanation of symbols]

 101a to 101c Ground control device 102a to 102c Ground side wireless transmission device 103 Train 104 Run permission position 105a to 105c Handover point 106 Control information 107 Position information 108 Reservation request 109 Station interlocking device 111 Train side wireless transmission device 112 Own vehicle position calculation device 113 Reservation cancellation request 201 Ground side wireless transmission device communication unit 202 Train tracking unit 203 Travel permitted position calculation unit 204, 204a, 204b Move destination determination unit 205 Handover point storage medium 206 Reservation request unit 207 Communication unit between ground control devices 208 Control information Creation unit 209 Station interlocking device communication unit 801 Security ground control device 802 Information ground control device 901 Communication unit between ground side wireless transmission devices 902 Radio control device

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yasushi Yokosuka 7-1-1, Omika-cho, Hitachi City, Ibaraki Prefecture Inside Hitachi, Ltd. Hitachi Research Laboratory, Ltd. (72) Inventor Keisuke Togishi 5-chome, Omika-cho, Hitachi City, Ibaraki Prefecture No. 1 Hitachi, Ltd. Omika Plant (72) Inventor Masayuki Shoji 5-2-1 Omikacho, Hitachi City, Ibaraki Prefecture Hitachi, Ltd. Omika Plant (72) Inventor Hiroyuki Akiyama Hitachinaka City, Ibaraki Prefecture 1070 Ma, Hitachi Ltd.Mito Plant (72) Inventor Naohiro Kasuya 1070 Ma, Hitachinaka City, Ibaraki Prefecture Hitachi Ltd.Mito Plant (72) Inventor Noriharu Amiya Kanda Surugadai, Chiyoda-ku, Tokyo 4-6, F-term (reference) in Hitachi, Ltd. Systems Division 5H115 PG01 SL01 SL06 TD15 5H161 AA01 BB02 BB11 CC13 DD21 5K067 AA33 BB12 EE02 EE10 EE44 HH22 HH23 JJ39 JJ52 JJ71

Claims (11)

[Claims] 1. A method for determining a destination base station of a mobile station mounted on a mobile unit that moves on a predetermined route, the method including determining a current position of the mobile unit and the predetermined position to which the mobile unit moves. A method for determining a base station to which a mobile station moves, wherein a mobile station mounted on the mobile body determines a base station with which communication is to be performed next based on a route. 2. The current position of a train on which the train-side wireless device is transmitted transmitted from the train-side wireless device, and the current position of the train on which the train-side wireless device is communicating with the train-side wireless device among a plurality of ground-side wireless devices installed on the ground. The current position of the train received and received by the ground-side wireless device, the current position of the other train, and the open condition of the route ahead of the train, based on which track the train is permitted to travel. In the train signal system that calculates the travel permission position that is the farthest point above, and transmits the calculated travel permission position to the train side wireless device via the ground side wireless device in communication with the train side wireless device. A method of determining a destination ground-side wireless device of a train-side wireless device to be used, wherein the train-side wireless device mounted on the train is to communicate next from a travel-permitted position of the train. Judge A method for determining a ground-side wireless device at a destination of a train-side wireless device. 3. The method according to claim 2, wherein the train-side wireless device moves to a ground-side wireless device that changes the ground-side wireless device with which the train-side wireless device communicates. Is predetermined between the ground-side wireless devices adjacent to each other in the communication area, and the travel-permitted position of the train is the ground-side wireless device communicating with the train-side wireless device mounted on the train. When the device and the communication area are located at positions farther from the current position of the train than a handover point set between the ground-side wireless device and the adjacent ground-side wireless device, communicate the traveling permission position of the train. Wherein the ground-side wireless device included in the area is determined as the ground-side wireless device with which the train-side wireless device mounted on the train should communicate next, and the ground-side destination of the train-side wireless device Wireless device determination method. 4. The method according to claim 3, wherein the train-side wireless device mounted on the train is determined to perform communication next. A method of determining a ground-side wireless device to which a train-side wireless device has moved, wherein the ground-side wireless device reserves a wireless channel for communicating with the train-side wireless device. 5. The method according to claim 4, wherein the ground-side wireless device to which the train-side wireless device moves is reserved for a wireless channel with the ground-side wireless device with which communication is to be performed next. For the train equipped with the side wireless device, the newly calculated traveling permission position of the train is
A handover point set between the ground-side wireless device communicating with the train-side wireless device and the ground-side wireless device that has reserved the wireless channel has moved to a position closer to the current position of the train. In such a case, the reservation of the wireless channel is canceled with respect to the ground-side wireless device that has made the reservation of the wireless channel. 6. The current position of a train equipped with the train-side wireless device transmitted from the train-side wireless device is determined by using the train-side wireless device that is communicating with the train-side wireless device among a plurality of ground-side wireless devices installed on the ground. The current position of the train received and received by the ground-side wireless device, the current position of the other train, and the open condition of the route ahead of the train, based on which track the train is permitted to travel. A train signal system that calculates the travel permission position that is the farthest point on the upper side and transmits the calculated travel permission position to the train side wireless device via the ground side wireless device communicating with the train side wireless device. A train determination device for determining a ground-side wireless device with which the train-side wireless device mounted on the train should communicate next, based on the calculated travel-permitted position of the train. Signal system. 7. The train signal system according to claim 6, wherein the destination determining means is configured so that the train-side wireless device is determined in advance between the ground-side wireless devices adjacent to each other in a communication area. And a storage means for storing a handover point which is a position on a track for changing the ground-side wireless device, wherein the calculated travel permission position of the train is one of the handover points stored in the storage means. The current position of the train is higher than the handover point set between the ground-side wireless device and the adjacent ground-side wireless device in which the ground-side wireless device and the communication area communicating with the train-side wireless device mounted on When the train-side wireless device mounted on the train is to communicate with the ground-side wireless device that includes the travel permission position of the train in the communication area when the train-side wireless device is next Train signal system and determines that the side wireless device. 8. The train signal system according to claim 6, wherein the destination determining unit determines that the train-side wireless device mounted on the train should perform communication next. A train signal system for reserving a wireless channel for communicating with the train-side wireless device with respect to the train-side wireless device. 9. A train signal system according to claim 8, wherein said destination determination means is configured to reserve a wireless channel with said ground side wireless device with which communication is to be performed next. For the train equipped with the above, the newly calculated travel permission position of the train is the ground-side wireless device communicating with the train-side wireless device and the ground-side wireless device that has reserved the wireless channel. When moving to a position closer to the current position of the train than the handover point set in between, the reservation of the wireless channel is canceled for the ground-side wireless device that has reserved the wireless channel. And train signal system. 10. The train signal system according to claim 6, 7, 8, or 9, wherein a plurality of ground control devices provided corresponding to each of the plurality of ground-side wireless devices and an open state of a track. A station interlocking device that collects information, and a communication network that connects the plurality of ground control devices and the station interlocking device, wherein the plurality of ground control devices each receive the train from the corresponding ground-side wireless device. The current position of the other train received from the other control device via the communication network, based on the open state of the route received from the station interlocking device via the communication network, The travel permission position calculating means for calculating the travel permission position of the train that has received the current position from the ground-side wireless device, and the train permission position calculated by the travel permission position calculation means, Train signal system characterized in that it comprises, said destination determining means for determining the ground-side wireless device to perform communication serial train side wireless device next. 11. The train signal system according to claim 6, 7, 8 or 9, wherein a plurality of ground control devices provided corresponding to each of the plurality of ground-side wireless devices and a state of opening / closing of a track. A station interlocking device that collects information, and a communication network that connects the plurality of ground control devices and the station interlocking device, wherein the plurality of ground control devices each receive the train from the corresponding ground-side wireless device. The current position of the other train received from the other control device via the communication network, based on the open state of the line received from the station interlocking device via the communication network, The vehicle further includes travel permission position calculating means for calculating a travel permission position of the train that has received the current position from the ground wireless device, wherein the plurality of ground wireless devices each correspond to the travel permission position of the corresponding ground control device. The travel-side determination device for determining the ground-side wireless device with which the train-side wireless device mounted on the train should perform next communication, based on the running permission position of the train calculated by the issuing device. Train signal system.