JP2003231467A - Destination base station determining method for movable body and mobile communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To accurately determine a destination base station of a mobile station moving on a predetermined route. <P>SOLUTION: In a ground side controller 101, a traveling allowed position 104 provided to a train 103 is compared with a hand-over point 105, it is determined that the train 103 will travel beyond the hand-over point 105 if the traveling allowed position 104 exceeds the hand-over point 105, and a radio channel of a ground side radio controller 102 beyond the hand-over point 105 is reserved. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for determining a movement destination base station of a mobile station in a mobile communication system used for a mobile moving along a predetermined route, and more particularly,
The present invention relates to a technique for determining a destination ground side wireless device to be communicated next when a train in communication moves in a wireless train signal system in a railway security system.

[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 for switching the base station with which the mobile station communicates is required.

As a conventional handover in mobile communication, for example, there is a technique described in Japanese Patent Laid-Open No. 9-307943. According to this technique, the strength of the radio wave of the mobile station is detected by the movement prediction means at the adjacent base station or the like, and the destination base station of the mobile station is predicted. The base station determined to be the movement destination by the prediction interrupts the communication path between the mobile station and the base station that is the communication partner of the mobile station to make a conference call to make a handover reservation for the mobile station. When the mobile station detects that the radio wave from the base station, which is a communication partner, has weakened, the handover is performed by switching the communication destination to the base station (the base station that interrupted the communication path) determined to be the movement destination by prediction. To complete.

[0004]

By the way, in the conventional handover in mobile communication, the strength of the radio wave of the mobile station is detected by an adjacent base station or the like to predict the destination base station of the mobile station. . Further, the mobile station detects that the radio wave from the base station, which is the communication partner, has weakened, and switches the communication partner to the base station that is 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 destination of the mobile station may be erroneously predicted. If you make a mistake in predicting the destination of the mobile station,
Since the reservation cannot be normally made, the communication may be interrupted due to the handover, or the wireless base station may be frequently changed in an attempt to switch the communication to the correct base station, resulting in deterioration of the communication quality.

[0006] In particular, when the conventional handover in mobile communication is applied to a wireless train signal system in a railway security system, interruption of communication or deterioration of communication quality causes obstacles to updating train position information and control to trains. It causes obstacles to information transmission.

The present invention has been made in view of the above circumstances, and an object of the present invention is to accurately determine the destination base station of a mobile station traveling on a predetermined route. More specifically, in the wireless train signal system in the railway security system, by accurately determining the ground side wireless device to which the train side wireless device is mounted, the train side wireless device is reliably reserved Is to be able to do.

[0008]

In order to solve the above-mentioned problems, the present invention is a method of determining a base station of a moving destination of a mobile station mounted on a moving body moving on a predetermined route,
It is characterized in that a mobile station mounted on the mobile unit determines a base station to communicate next based on the current position of the mobile unit and the predetermined route along which the mobile unit moves.

According to the present invention, the base station to which the mobile station should communicate next is determined from the current position of the mobile body and a predetermined route along which the mobile body moves. It is possible to make a more accurate determination. Therefore, it is possible to reliably make a reservation at the movement-destination base station, so that it is possible to reduce communication interruption and communication quality deterioration due to a handover operation due to the movement-destination prediction error.

Further, according to the present invention applied to a train signal system in a railway security system, the present position of a train equipped with the train side wireless device transmitted from the train side wireless device is set to a plurality of ground side installed on the ground. Received by the ground-side wireless device in communication with the train-side wireless device of the wireless device, the current position of the train received, the current position of the other train, and the open state of the path ahead of the train On the basis of the above, the travel permission position, which is the farthest point on the track permitted to travel to the train, is calculated, and the calculated travel permission position is passed through the ground side wireless device in communication with the train side wireless device. A method for determining a ground-side wireless device of a destination of the train-side wireless device used in a train signal system for transmitting to the train-side wireless device, the method being 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.

Specifically, a handover point, which is a position on the track where the train-side wireless device changes the ground-side wireless device to be a communication partner, is predetermined between the ground-side wireless devices adjacent to each other in a communication area. The travel-permitted position of the train is between the ground-side wireless device in communication with the train-side wireless device mounted on the train and the ground-side wireless device whose communication area is adjacent to the ground-side wireless device. Position farther from the current position of the train than the handover point set in (may include the handover point)
In the case of, the ground-side wireless device including the travel-permitted position of the train in the communication area is determined to be the ground-side wireless device to be communicated next by the train-side wireless device mounted on the train.

When the present invention is applied to the train signal system in the railway security system, the ground-side wireless device with which the train-side wireless device should communicate next is equipped with the train-side wireless device calculated as railway security information. It is determined by comparing the travel-permitted position of the train with a handover point, which is a position on the track where the train-side wireless device changes the ground-side wireless device to be a communication partner. Therefore, it becomes possible to more accurately determine the destination ground-side wireless device. Therefore, it is possible to reliably make a reservation to the ground side wireless device of the moving destination, so that it is possible to reduce the interruption of communication and the deterioration of communication quality in the handover operation due to the prediction error of the moving destination.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An 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, the train signal system to which this embodiment is applied includes a train side wireless transmission device 111 and a vehicle position calculation device 112 mounted on a train 103 traveling on a track, and a train side wireless transmission. The ground side wireless transmission devices 102a to 102c installed in different communication areas (control ranges) so as to be able to perform wireless communication with the device 111.
(Hereinafter, also simply referred to as the ground side wireless transmission device 102)
And ground control devices 101a to 101c (hereinafter, also simply referred to as ground control device 101) for controlling each of the ground side wireless transmission devices 102a to 102c, and a ground connection device connected to the ground control device 101 via a communication network. The station interlocking device 109 that collects information such as the direction of the vessel and the opening status of the route (state of the traffic light).

Although FIG. 1 shows three terrestrial radio transmission devices 102 and three terrestrial control devices 101, the number is naturally not limited to these numbers.

In the train signal system configured as described above, 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 moving distance from the station. , Position information 107 that 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) that is a communication partner.

Next, the ground side wireless transmission device 102 which has received the position information 107 receives the position information 107 from the ground control device 101 which controls the ground side wireless transmission device 102.
(101a in the example shown in FIG. 1).

Next, the ground control device 101 having 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 permitted position 104 for the train 103. Here, the travel permitted position is the farthest point on the track where the train is allowed to travel, that is, on the track where the train can travel safely without colliding with or derailing another train. Is the limit point of. The travel-permitted position has been conventionally used for automatic train control in a railway security system, and a method for determining it will be briefly described.

The ground control device 101 recognizes 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. Stores the linear data of the track on which the train runs, and the information such as the opening status of the route and the orientation of the rolling device received from the station interlocking device 109. By using these information, the ground under the control is controlled. With respect to the train recognized from the position information received from the side wireless transmission device 102, the state of the track in front of the train is checked, and a search is made until an unopened route end, a preceding train, or the like that hinders the running of the train is found. When there is a branch, it is determined which of the branch destinations is to be searched from the direction of the rolling device. As a result of the search, the obstacle position found is set as the travel-permitted position.

The ground control device 101 receives the position information 1 received from the ground side wireless transmission device 102 under control.
When the travel permission position 104 of the train 103 recognized from 07 is determined, the train 10 including the travel permission position 104 is determined.
Control information 106, which is information for controlling the traveling of No. 3, is generated, and the ground side wireless transmission device 102 under the control is generated.
Pass to.

Next, the ground-side wireless transmission device 102 that has received the control information 106 sends the control information 106 to the train 1
It transmits to the train side wireless transmission device 111 mounted in 03.

As described above, the travel-permitted position 104 is
It is determined by referring to information such as the opening status of the route and the orientation of the troll. Therefore, the travel-permitted position 104 is the train 1
03 indicates the direction in which the vehicle is scheduled to travel. Therefore,
In the present embodiment, in the ground control device 101, based on the travel-permitted position 104, the train-side wireless transmission device 111 mounted on the train 103 should communicate next, that is, the destination The ground-side wireless transmission device 102 is determined.

The ground control device 101 is on a track which is predetermined between the ground-side wireless transmission devices 102 whose communication areas are adjacent to each other and which changes the ground-side wireless transmission device 102 with which the train-side wireless transmission device 111 communicates. Stored are the handover points 105a to 105c, which are the positions, and the travel-permitted position 104 of the train 103 includes the ground-side wireless transmission device 102 and the communication area in communication with the train-side wireless transmission device 111 mounted on the train 103. The ground side wireless transmission device 10
It is checked whether or not it is on a handover point set between the ground-side wireless transmission device 102 adjacent to No. 2 and 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 or not the travel-permitted 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 travel-permitted position 104 of the train 103 is on the above handover point or at a position farther from the current position of the train 103 than the above handover point, the train 103 travels beyond the above handover point. Therefore, the ground side wireless transmission device 102 including the travel permitted position 104 of the train 103 in the communication area can be predicted as
The train-side wireless transmission device 111 installed in 03 is determined to be the ground-side wireless transmission device 102 to be communicated next. Figure 1
In the example shown in FIG.
It is determined that the train-side wireless transmission device 111 mounted on the No. 03 is the ground-side wireless transmission device 102 to be communicated next.

Next, the ground control device 101 operates the train 103.
The train-side wireless transmission device 111, which is installed in the vehicle, communicates with the train-side wireless transmission device 111 with respect to the ground-side control device 101 that controls the ground-side wireless transmission device 102 that has been determined to communicate next. A wireless channel reservation request 108 is transmitted. In the example shown in FIG. 1, the ground control device 101a transmits to the ground control device 101b a reservation request 108 for a wireless channel for communicating with the train-side wireless transmission device 111.

Next, when the ground control apparatus 101 receives a notification indicating that the reservation has been made from the ground control apparatus 101 that has requested the reservation of the wireless channel, the information of the reserved wireless channel is sent to the ground control apparatus under control. It is transmitted to the train side wireless transmission apparatus 111 via the side wireless transmission apparatus 101. In response to this, when the train 103 reaches the communication area of the ground side wireless transmission device 102 for which the train 103 is determined to perform the next communication, the train side wireless transmission device 111 uses the reserved wireless channel. It communicates with the ground-side wireless transmission device 102. In the example shown in FIG. 1, the current position of the train 103 calculated by the vehicle position calculation device 112 is the handover point 105.
When it 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.

In the ground control device 101, the travel permitted position of the train 103, which is determined based on the current position of the train 103 newly sent from the train side wireless transmission device 111, is installed in the train 103. Side wireless transmission device 1
11 when moving to a position closer to the current position of the train 103 than the handover point set between the ground-side wireless transmission device 102 that is in communication with 11 and the ground-side wireless transmission device 102 that reserved the wireless channel. The reservation cancel request 113 is transmitted to the terrestrial control apparatus 101 that controls the terrestrial radio transmission apparatus 102 that has reserved the channel, and the fact is notified via the terrestrial radio transmission apparatus 101 under the control. , To the train-side wireless transmission device 111.

As described above, in the present embodiment, by referring to the travel-permitted position used for automatic control of the train in the railway security system, the ground side wireless transmission device 102 to which the train 103 is moved is accurately determined. Then, it becomes possible to reserve the wireless channel. Further, if the travel-permitted position moves and the schedule is changed, the reservation request can be canceled.

Next, the ground control device 101, which is a main component of the train signal system of the present 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 apparatus 101 shown in FIG.

As shown in the figure, the ground control device 101 is
Ground side wireless transmission device communication unit 201, station interlocking device communication unit 209, inter-ground control device communication unit 207, train tracking unit 202, travel permission position calculation unit 203, control information creation unit 208, and handover point. The storage medium 205, the destination determination unit 204, and the reservation requesting unit 206 are provided.

The terrestrial radio transmission apparatus communication unit 201 receives position information 107 from the terrestrial radio transmission apparatus 102 under control.
Is received and passed to the train tracking unit 202. Further, the control information 106 created by the control information creation unit 208, which will be described later, the reservation request for the wireless channel received by the inter-ground-control-device communication unit 101, and the cancellation request for the reservation are issued to the ground-side wireless transmission device 102 under control. Pass to.

The train tracking unit 202 has a database of 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 train identification information and the current position are recognized from the information, and the current position of the train on the database is updated.

The station interlocking device communication section 209 has a database of information such as the opening status of the route and the orientation of the troll device, and the station interlocking device 1 is operated at a constant cycle, for example, every one second.
09, communicates with 09, receives information such as the opening status of the route and the orientation of the rolling device, and updates the database.

The inter-ground-control-device communication section 207 has a database of the current position of each train equipped with the train-side wireless transmission device 111 that is in communication 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 another ground control device 101 at a cycle of 1 second, acquires the current position of each train, and updates the database. Further, the inter-ground controller communication unit 207 transmits a reservation request or reservation cancellation request of a wireless channel created by a reservation request unit 206 described later to another ground controller 101 or from another ground controller 101. It receives the reservation request and reservation cancellation request of the received wireless channel.

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

The control information creation unit 208 includes information for each train whose travel-permitted position determined by the travel-permitted position calculation unit 203, including the travel-permitted position of the train, for controlling the travel of the train. Control information 106 is generated.

The handover point storage medium 205 is a ground control device 10 including the handover point storage medium 205.
The ground-side wireless transmission device 102, which is predetermined between the ground-side wireless transmission device 102 controlled to 1 and the ground-side wireless transmission device 102 whose communication area is adjacent to the ground-side wireless transmission device 111, is a communication partner of the train-side wireless transmission device 111. Of the handover points 105a to 105c, which are the positions on the line to be changed, and the terrestrial radio transmission apparatus 102 beyond the handover points 105a to 105c, that is, the handover points 105a to 105c.
The ground side wireless transmission apparatus 102 controlled by the ground control apparatus 101 including the handover point storage medium 205 and the communication area (control range) of the adjacent ground side wireless transmission apparatus 102 are stored in association with each other via the 5c. is doing.

The movement destination determination unit 204 refers to the travel-permitted position of the train determined by the travel-permitted position calculation unit 203 and the handover point stored in the handover point storage medium 205, and moves the train-side wireless transmission apparatus 111. The preceding ground side wireless transmission device 102 is determined.

The reservation requesting unit 206 has a destination determining unit 204.
A reservation request for a wireless channel is made to the ground side wireless transmission apparatus 102 that has been determined to be the destination. In addition, when the travel-permitted position moves and the ground-side wireless transmission device 102 once determined to be the destination by the destination determination unit 204 is removed from the destination, the ground-side wireless transmission device 102 is performed. Create a cancellation request for a reserved wireless channel. In addition, the reservation requesting unit 206 includes the inter-ground controller communication unit 207.
The wireless channel reservation request and the wireless channel reservation cancel request received in step 3 are passed to the ground side wireless transmission device communication unit 201.

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

First, the terrestrial radio transmission apparatus communication section 201
Is from the ground-side wireless transmission device 102 under control to the train 103.
Upon receiving the position information 107 of the train tracking unit 20
Pass 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 travel-permitted position calculation unit 203 determines 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 controller communication unit 207. , Station interlocking device communication unit 20
Information such as the opening status of the route and the orientation of the rolling device stored in the database 9 is acquired. Then, the travel-permitted position of the train 103 whose current position has been updated in step 301 is determined using the acquired information and the linear data of the track stored in advance by the travel-permitted position calculation unit 203 (step 302). .

That is, with respect to the train 103, the track condition in front of the current position of the train 103 (in the traveling direction) is checked until an obstacle such as an unopened route end or a preceding train that interferes with the running of the train 103 is found. Search for. When there is a branch, it is determined which of the branch destinations is to be searched from the direction of the rolling device. The obstacle position found as a result of the search is set as the travel-permitted position 104 of the train 103.

Next, the destination decision 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-permitted position 104 of the train 103 determined in step 302 is checked (step 303).

Next, the destination decision 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 between the train 103 and the travel-permitted position 104 of the train 103, the train 103 is located in front of the train 103 (direction of travel) and
It is checked whether or not there is a handover point on the travel-permitted position 104 of the train 103 or on the current position side of the train 103 with respect to the travel-permitted position 104 of the train 103. In other words,
It is checked whether or not the travel-permitted position 104 of the train 103 exists on the handover point or beyond the handover point, and there is a handover point having a positional relationship distant from the current position of the train 103 (step 304).

When there is a handover point having such a positional relationship, the terrestrial radio transmission apparatus 102 controlled by the terrestrial control apparatus 101 and the terrestrial radio transmission apparatus 102 which is adjacent to the terrestrial radio transmission apparatus 102 with the handover point in between, Train 103
(Step 305), and if not, the identification information of the ground control device 101 that controls the adjacent ground side wireless transmission device 102, and the train The identification information 103 and the identification information of 103 are passed to the reservation requesting unit 206 to instruct the reservation request of the wireless channel.

On the other hand, when there is no handover point having such a positional relationship, it is checked whether or not the wireless channel reservation for the train 103 has been made (step 308). A ground control device 1 for controlling the ground wireless transmission device 102 in which the reservation is made.
The identification information of 01 and the identification information of the train 103 are passed to the reservation requesting unit 206 to instruct to make a reservation cancellation request for the wireless channel.

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

In response to this, the ground control device 10 which has received the reservation request 108 for the radio channel for the train 103
1 examines the vacant status of the wireless channel of the ground side wireless transmission apparatus 102 under control via the ground side wireless transmission apparatus communication unit 201, and if there is a vacancy, the train that has the wireless channel installed in the train 103 It is assigned to a channel for 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 requesting unit 206 receives an instruction to create a reservation cancellation request for a wireless channel from the destination determining unit 204, the reservation requesting unit 206 determines that the ground control device 101 is identified by the identification information received from the destination determining unit 204. On the other hand, the wireless channel reservation cancellation request 113 for the train 103 is created (step 309). Upon receiving the reservation cancellation request 113 for the wireless channel from the reservation requesting unit 206, the inter-ground controller communication unit 207 transmits this to the target ground controller 101 (step 31).
0).

In response to this, the ground control device 101, which has received the reservation cancellation request 113 of the wireless channel for the train 103, controls the ground side wireless transmission device 102 via the ground side wireless transmission device communication unit 201. 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 generator 208 determines that the train 10
Control information 106, which is information for controlling the train 103, including the travel-permitted position 104 of No. 3 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 made, the control information 106 is created including the information of the wireless channel. Further, when the reservation of the wireless channel for the train 103 is canceled, the control information 106 is created including the information to that effect.

Next, the ground side wireless transmission device communication section 201
Is the control information 106 of the train 103 received from the control information creation unit 208, and the ground side wireless transmission device 1 under control.
02 (step 312). In response to this, the ground-side wireless transmission device 102 transmits the control information 106 to the train 10
It transmits to the train side wireless transmission device 111 mounted in No. 3.

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.
4 is a flowchart for explaining the process of No. 4 in FIG.

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

Next, the destination determining unit 204 determines the travel-permitted position 104 of the train 103 determined in step 303 of FIG.
Checks whether it is inside or outside the communication area extracted in step 401 (step 40
2) If it is within the communication area, it is determined that the travel-permitted position 104 of the train 103 does not exceed the handover point (step 403), and steps 308 to 31 in FIG.
After executing 0 (step 411), step 3 in FIG.
Go 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-permitted position 104 of the train 103 determined in step 303 of FIG.
When it is determined that the communication area is outside the communication area extracted in step 401, the movement destination determination unit 204 determines the handover points 105a to 105a stored in the handover point storage medium 205.
The information of the handover point stored at the head of the information of 105c is searched (step 404).

Next, the movement destination determination unit 204 retrieves the information of the communication area of the ground side wireless transmission device located ahead of the read out handover point (step 405), and the running of the train 103 decided in step 303 of FIG. Permission 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-permitted 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-permitted position 104 of the train 103 determined in step 303 of FIG.
When it is determined that the communication point is outside the communication area extracted in step 405, the movement destination determination unit 204 determines the handover point 105a to the handover point 105a stored in the handover point storage medium 205.
It is checked whether or not there is information that has not been referred to in the information of 105c (step 408), and if there is information, that information is searched (step 410) and the process returns to step 405. On the other hand, if there is not, the travel permitted position 1 of the train 103
04 is a train-side wireless transmission device 1 mounted on the train 103
Even though 11 is outside the communication area of the ground-side wireless transmission device 102 with which it is communicating, the handover points 105 a to 10 a-10 stored in the handover point storage medium 205 are stored.
It means that none of 5c is exceeded. In this case, it is determined that there is an error in the travel permitted 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, the format of a wireless channel reservation request / reservation cancellation request transmitted from the ground control apparatus 101 to another ground control apparatus 101 will be described.

FIG. 5 is a diagram for explaining a format example of the wireless channel reservation request 108 transmitted from the inter-ground controller 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 wireless channel. It is composed of identification information (ID) of the side wireless transmission device 111 and information indicating the type of reservation request or reservation cancellation request. As described above, the reservation request unit 206
Receives the identification information of the ground-side wireless transmission device 102 of the destination, 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 based on these information, the reservation request 108. Or reservation cancellation request 11
Create 3.

The format in which the ground control device 101 that receives the reservation request 108 notifies the ground control device 101 that has transmitted the reservation request 108 of the reserved wireless channel is the same as that shown in FIG. Can be configured. In this case, information about the reserved wireless channel may be included in the type information.

Next, the linear data of the line held by the travel-permitted 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 communication apparatus 102. Here, paying attention to the linear data of the track held by the travel-permitted position calculating unit 203 of the ground control apparatus 101a, and the relationship between the handover point stored in the handover point storage medium 205 and the communication area of each upper radio transmission apparatus 102. Shows.

First, the linear data of the track held by the travel-permitted position calculating section 203 will be described. Ground control device 1
The travel permission position calculation unit 203 of 01a is the ground control device 1
01a controls the communication area of the ground-side wireless transmission device 102a and the ground-side wireless transmission devices 102b and 102c adjacent to the ground-side wireless transmission device 102a, at least for the lines belonging to the communication areas, the shape of the line and the line It stores the installed switches and traffic lights as linear data. According to the example shown in FIG. 6, linear data is stored for each of the up line (line segment 1) and the down line (line segment 2). As described above, the travel-permitted position calculation unit 203 includes 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 inter-ground controller communication unit 207, and A train that seeks the travel-permitted position by expanding the route opening status and the orientation of the troll device stored in the database of the station interlocking device communication unit 209 on the track specified by the stored linear data. Check the track condition in front of the current position (direction of travel), and search until you find an obstacle that does not allow the train to run, such as an unopened track edge or a preceding train, to find the position where the train is permitted to travel. decide.

Next, the 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 apparatus 101a is on the line,
Controlled by the ground side wireless transmission device 102a and the communication point of the ground side wireless transmission device 102a adjacent to the communication area of the ground side wireless transmission device, the handover point set at the boundary, and the ground side wireless device located beyond the handover point. The transmission device, that is, the communication area of the ground side wireless transmission device 102a adjacent to the ground side wireless transmission device 102a via the handover point is 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, in the handover point storage medium 205, for each handover point, the position of the handover point and the identification information (ID) of the terrestrial radio transmission apparatus 102 ahead of the handover point are combined. The table 114 stored as, the control range (communication area) of the terrestrial radio transmission device and the identification information of the terrestrial control device connected to the terrestrial radio transmission device for each upper radio transmission device ( ID) and a table 115 that is stored as a pair. Here, the control range may be represented by, for example, the starting distance and the ending distance for each line segment.

As described above, the movement destination determination unit 204 of the ground control unit 101a reads out the information of the handover point from the table 114, reads out the control range of the ground side wireless transmission device contained in the read information from the table 115, and reads out the control range. The process of checking whether or not the travel-permitted position of the train determined by the travel-permitted position calculation unit 203 is within the read control range is sequentially performed on the handover points stored in the table 114. Then, the terrestrial radio transmission apparatus of the moving destination 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 the travel-permitted position of the train is at the handover point or at a position beyond the handover point. It is possible to accurately determine the terrestrial radio transmission device of the moving destination to be communicated next.
Therefore, it is possible to efficiently reserve a wireless channel, and it is possible to prevent communication interruption and communication quality deterioration due to a handover operation.

Specifically, the train travel permitted position is calculated only in the traveling direction of the train because it is calculated in consideration of the road opening situation and the orientation of the rolling machine. For example, in FIG.
As shown in, when the train 103 advances to a branch destination, the travel-permitted position 104 is calculated only at the branch destination to which the train 103 heads. Therefore, by referring to the travel-permitted position 104, it is possible to accurately determine to which branch destination the train 103 will travel. Also, after the train 103 approaches near the handover point 105b,
In the case of returning in the opposite direction without exceeding the handover point 105b, the route beyond the handover point 105b is not opened, and therefore the travel-permitted position 104 is not calculated at a position exceeding the handover point 105b. Therefore, it is possible to improve the utilization efficiency of the wireless channel without making unnecessary 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 gist thereof.

For example, in the above embodiment, the ground control device 101 is configured by one device as shown in FIG. 2, but it may be configured by two devices as shown in FIG. Good. That is, in the security ground control device 801, information such as the opening condition of the route and the orientation of the rolling device is fetched from the station interlocking device 109, and the travel permission position that guarantees the safety of the travel of the train 103 is determined and the control information is determined. In the information ground control device 802, communication with the ground side wireless transmission device 102 under control, communication with another ground control device 101, and train side wireless transmission device mounted on the train 103 are created. 111 may be made to judge the ground side wireless transmission apparatus 102 which should communicate next.

By thus 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, since the determination of the travel-permitted position is important for ensuring the safety of train travel, high reliability is required. Therefore, as shown in FIG.
By dividing the security ground control device 801 and the information ground control device 802 into two and multiplexing the security ground control device 801 into the operation system and the quasi-purpose system, the reliability can be improved. In addition, about each block which comprises the ground control apparatus 101 shown in FIG. 8, what is attached | subjected with the same code | symbol as what is shown in FIG. 2 has the same function.

In FIG. 8, the destination determination unit 204a
The travel-permitted position calculated by the travel-permitted position calculation unit 203 cannot be directly referenced. Therefore, the destination determination unit 20
4a is the control information 10 created by the control information creating unit 208.
When 6 is transmitted to the ground side wireless transmission apparatus 102 under control via the ground side wireless transmission apparatus communication unit 201, the travel permitted position is extracted with reference to the content of the control information 106.
The operation after taking out the travel-permitted position is basically the same as that of the above-mentioned embodiment, and therefore its explanation is omitted. However, when it is necessary to reserve a wireless channel due to the taken travel permitted position and the wireless channel is reserved, the movement destination determination unit 204a causes the other ground control device 101 to operate.
The information of the reserved wireless channel received from the control information 106 is included in the ground side wireless transmission device communication unit 201.
Pass to. In addition, when it is necessary to cancel the reservation of the wireless channel due to the taken travel permitted position, the fact is included in the control information 106, and the ground side wireless transmission device communication unit 2 is included.
Pass to 01.

As described above, the ground control device 101 includes the security ground control device 801 that determines the travel-permitted position by fetching route opening information from the station interlocking device 109, and the ground-side wireless transmission device to which the train is moved. When configured separately from the information ground control device 802 that determines 102, let's determine the ground-side wireless transmission device 102 to which the train is moving, using information such as the opening status of the route and the orientation of the rolling device. Then, a protocol for transmitting these pieces of 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 from the security ground control device 801 to determine the above is only the travel-permitted position included in the control information 106. Therefore, 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
It becomes possible to configure the ground control device 101.

In the above-described embodiment, the train side wireless transmission device 111 determines the destination ground side wireless transmission device 102 to communicate with next by the ground control device 101, but the present invention is not limited to this. It is not limited. For example, as shown in FIG. 9, the train-side wireless transmission apparatus 111 determines the destination ground-side wireless transmission apparatus 102 to be communicated next with the ground-side wireless transmission apparatus that is in communication with the train-side wireless transmission apparatus 111. You may make it perform in 102.

In the example shown in FIG. 9, the destination determination unit 204
b, the handover point storage medium 205, and the reservation requesting unit 206 are provided in the terrestrial radio transmission apparatus 102, unlike the terrestrial control apparatus 101 shown in FIG. In addition, about each block which comprises the ground control apparatus 101 and the ground side radio transmission apparatus 102 shown in FIG. 9, what is attached | subjected with the same code | symbol as what is shown in FIG. 2 has the same function.

In FIG. 9, the destination determination unit 204b is
Refer to the travel-permitted position 104 included in the control information 106 transmitted from the ground control apparatus 101 that controls the ground-side wireless transmission apparatus 102 to the ground-side wireless transmission apparatus 102 including the destination determination unit 204b. Thus, similarly to the above embodiment, the ground-side wireless transmission device 102 to which the train is moving is determined. Then, the judgment result is passed to the reservation requesting unit 206.

The reservation requesting unit 206 creates a reservation request for a wireless channel or a reservation cancellation request according to the result of the determination, and the ground-side wireless transmission apparatus 1 via the communication network.
Communication unit 901 between ground-side wireless transmission devices for communication between
Thus, the wireless channel reservation request or reservation cancellation request is transmitted to the terrestrial radio transmission apparatus 102 that is the destination of the request. Then, via the inter-terrestrial wireless transmission device communication unit 901, a reply is received from the destination wireless transmission device 102 of the reservation request or reservation cancellation request.

When the reservation requesting unit 206 makes a reservation for a wireless channel, the destination determining unit 204b stores the information of the reserved wireless channel received from the ground-side wireless transmission device 102 of the reservation destination in the control information 106. It is also passed to the wireless control device 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.

The radio control device 902 transmits the position information 107 received from the train side radio transmission device 111 in communication to the 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 processing can be performed only by the terrestrial radio transmission apparatus 102. As a result, it is possible to clearly distinguish the operation of each device such that the ground control device 101 only controls the running of the train and the ground side wireless transmission device 102 only controls the communication with the train. And distribute the load,
It is possible to simplify the system configuration.

Further, although the case where the present invention is applied to the train signal system in the railway security system has been described, the present invention is mounted on a moving body such as a route bus in which a mobile station moves along a predetermined route. It is widely applicable to mobile communication systems. In this case, instead of the travel-permitted position, based on the current position of the route bus and a predetermined route, the mobile station (vehicle-side wireless transmission device) mounted on the route bus determines the destination of the next communication. The base station (ground side wireless transmission device) may be determined. Also,
Based on the traffic congestion situation obtained from the traffic information, the route bus predicts the time to reach the communication area of the determined base station of the next destination to communicate with, that is, the time to reach the handover point. , According to the prediction result,
It may be possible to determine whether or not to make a reservation for a wireless channel to the base station of the moving destination to be communicated next.

[0089]

As described above, according to the present invention,
With the above configuration, the mobile station can accurately determine the base station to which the mobile station should communicate next. Therefore, it is possible to reliably make a reservation at the movement-destination base station. It is possible to reduce communication interruption and deterioration of communication quality in the handover operation.

[Brief description of 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 a 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.

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

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

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

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

FIG. 8 is a schematic block diagram of a ground control device 101 in a modified example of the embodiment of the present invention.

FIG. 9 is a schematic block diagram of a ground control device 101 and a ground side wireless transmission device 102 in a modified example of an embodiment of the present invention.

[Explanation of symbols]

101a-101c Ground control device 102a to 102c Ground-side wireless transmission device 103 train 104 Travel permitted position 105a-105c Handover point 106 control information 107 location information 108 Reservation request 109 station interlocking device 111 Train side wireless transmission device 112 Vehicle position calculation device 113 Request to cancel reservation 201 Ground side wireless transmission device communication unit 202 Train Tracking Department 203 Travel Allowed Position Calculation Unit 204, 204a, 204b Destination determination unit 205 Handover point storage medium 206 Reservation request section 207 Communication unit between ground controllers 208 Control information creation unit 209 Station interlocking device communication department 801 Security ground control device 802 Information ground control device 901 Communication unit between ground side wireless transmission devices 902 wireless control device

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[Procedure amendment]

[Submission date] January 6, 2003 (2003.1.6)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Title of invention

[Correction method] Change

[Correction content]

Title: Method of determining base station of moving destination and mobile communication system

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yasushi Yokosuka             7-1-1, Omika-cho, Hitachi-shi, Ibaraki Prefecture             Inside the Hitachi Research Laboratory, Hitachi Ltd. (72) Inventor Keisuke Toji             5-2-1 Omika-cho, Hitachi City, Ibaraki Prefecture             Ceremony company Hitachi Ltd. Omika factory (72) Inventor Masayuki Shoji             5-2-1 Omika-cho, Hitachi City, Ibaraki Prefecture             Ceremony company Hitachi Ltd. Omika factory (72) Inventor Hiroyuki Akiyama             1070 Ichimo, Hitachinaka City, Ibaraki Prefecture Stock Association             Hitachi, Ltd. Mito factory (72) Inventor Naohiro Kasuya             1070 Ichimo, Hitachinaka City, Ibaraki Prefecture Stock Association             Hitachi, Ltd. Mito factory (72) Inventor Noriharu Amitani             4-6 Kanda Surugadai, Chiyoda-ku, Tokyo             Hitachi, Ltd. System Division F term (reference) 5H115 PA08 PC02 PG01 QA10 SF27                       SJ09 SL01 SL06 TZ02 UB05                 5H161 AA01 BB02 BB11 CC13 DD21                       EE04                 5K067 AA23 BB05 DD20 EE02 EE10                       EE16 EE24 JJ51

Claims (11)

[Claims] 1. A method of determining a base station of a moving destination of a mobile station mounted on a moving body moving on a predetermined route, comprising: a current position of the moving body and the predetermined movement of the moving body. A base station determination method of a destination of a mobile station, characterized in that a mobile station mounted on the mobile unit determines a base station to communicate next from a route. 2. The current position of the train equipped with the train-side wireless device transmitted from the train-side wireless device is used to communicate with the train-side wireless device among the plurality of ground-side wireless devices installed on the ground. A track that is allowed to travel to the train based on the current position of the train received by the ground-side wireless device, the received current position of another train, and the open state of the route ahead of the train. A train signal system for calculating a travel permission position which is the farthest point above and transmitting 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 for determining a ground-side wireless device to be used as a moving destination of a train-side wireless device, wherein the train-side wireless device mounted on the train is to communicate next from a travel-permitted position of the train. To judge And a method for determining a ground-side wireless device to which a train-side wireless device has moved. 3. The method for determining a ground side wireless device to which the train side wireless device of claim 2, wherein the train side wireless device changes the ground side wireless device with which the train side wireless device communicates. Is defined in advance between the ground-side wireless devices whose communication areas are adjacent to each other, and the travel-permitted position of the train is the ground-side wireless device in communication with the train-side wireless device mounted on the train. When the device and the communication area are located farther from the current position of the train than the handover point set between the ground-side wireless device and the adjacent ground-side wireless device, the travel-permitted position of the train is communicated. The ground side of the destination of the train-side wireless device, characterized in that the ground-side wireless device included in the area is determined as the ground-side wireless device to be communicated next by the train-side wireless device mounted on the train. Wireless device determination method. 4. The method of determining a ground-side wireless device to which the train-side wireless device of claim 3, wherein the train-side wireless device installed in the train should perform communication, is determined. A method for determining a ground-side wireless device to which a train-side wireless device has moved, characterized in that a reservation is made for a wireless channel for communication with the train-side wireless device. 5. The method of determining a ground side wireless device to which the train side wireless device of claim 4, wherein the train has a wireless channel reserved for a ground side wireless device to be communicated next. For a train equipped with a side wireless device, the newly calculated travel permitted position of the train is
Moved to a position closer to the current position of the train than the handover point set between the ground-side wireless device that is communicating with the train-side wireless device and the ground-side wireless device that made the reservation for the wireless channel. In this case, the method of determining the ground side wireless device to which the train side wireless device has moved is cancelled, with respect to the ground side wireless device that has made the reservation for the wireless channel. 6. The current position of the train equipped with the train-side wireless device transmitted from the train-side wireless device is used to communicate with the train-side wireless device among the plurality of ground-side wireless devices installed on the ground. A track that is allowed to travel to the train based on the current position of the train received by the ground-side wireless device, the received current position of another train, and the open state of the route ahead of the train. A train signal system that calculates a travel-permitted position that is the farthest point above, and transmits the calculated travel-permitted position to the train-side wireless device via the ground-side wireless device that is in communication with the train-side wireless device. The train characterized in that the train-side wireless device mounted on the train is equipped with a destination determination unit that determines the ground-side wireless device to be communicated next from the calculated travel-permitted position of the train. Signal system. 7. The train signal system according to claim 6, wherein the movement destination determination means determines that the train-side wireless device is predetermined between the ground-side wireless devices adjacent to each other in a communication area. The train has a storage unit for storing a handover point which is a position on the track for changing the ground side wireless device, and the calculated travel-permitted position of the train is one of the handover points stored in the storage unit. The current position of the train from the handover point set between the ground-side wireless device and the ground-side wireless device that is in communication with the train-side wireless device installed in When the train-side wireless device mounted on the train is to communicate next time, the ground-side wireless device that includes the travel-permitted position of the train in the communication area when it is located away from Train signal system and determines that the side wireless device. 8. The train signal system according to claim 6 or 7, wherein the moving destination determination means determines that the train-side wireless device mounted on the train should perform next communication. A train signal system which reserves a wireless channel for communication with the train-side wireless device for the train-side wireless device. 9. The train signal system according to claim 8, wherein the movement destination determination unit has a train side wireless device in which a wireless channel is reserved for the ground side wireless device to be communicated next. For a train equipped with, the newly calculated travel permitted position of the train is the ground-side wireless device that is communicating with the train-side wireless device and the ground-side wireless device that has made a reservation for the wireless channel. When moving to a position closer to the current position of the train than the handover point set between them, the reservation of the radio channel is canceled with respect to the ground side wireless device that made the reservation of the radio channel. Train signal system. 10. The train signal system according to claim 6, 7, 8 or 9, which relates to a plurality of ground control devices provided corresponding to each of the plurality of ground side wireless devices, and an opening state of a route. A station interlocking device that collects information, a communication network that connects the plurality of ground control devices and the station interlocking device, and each of the plurality of ground control devices receives the train from the corresponding ground side wireless device. The current position of the other trains received from the other control device via the communication network, and based on the opening state of the route received from the station interlocking device via the communication network, Based on the travel-permitted position calculation means for calculating the travel-permitted position of the train that has received the current position from the ground-side wireless device and the travel-permitted position of the train calculated by the travel-permitted position calculation means, the train is mounted on the train. 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 are provided corresponding to each of the plurality of ground side radio devices, and an open / close state of a track. A station interlocking device that collects information, a communication network that connects the plurality of ground control devices and the station interlocking device, and each of the plurality of ground control devices receives the train from the corresponding ground side wireless device. Of the current position of the other trains received from the other control device via the communication network, and the open state of the track received from the station interlocking device via the communication network, A travel-permitted position calculating means for calculating a travel-permitted position of the train that has received the current position from the ground-side wireless device, wherein each of the plurality of ground-side wireless devices respectively has the travel-permitted position of the corresponding ground control device; It is characterized in that the train-side wireless device mounted on the train is provided with the destination determination device that determines the ground-side wireless device to be communicated next from the travel-permitted position of the train calculated by the output means. Train signal system.