DESCRIPTION
FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
[See section 10, Rule 13]
TRAIN CONTROL SYSTEM;
MITSUBISHI ELECTRIC CORPORATION, A CORPORATION ORGANISED
AND EXISTING UNDER THE LAWS OF JAPAN, WHOSE ADDRESS IS 7-3,
MARUNOUCHI 2-CHOME, CHIYODA-KU, TOKYO 100-8310, JAPAN
THE FOLLOWING SPECIFICATION PARTICULARLY DESCRIBES THE
INVENTION AND THE MANNER IN WHICH IT IS TO BE PERFORMED.
2
DESCRIPTION
TITLE OF THE INVENTION:
TRAIN CONTROL SYSTEM
5
Field
[0001] The present disclosure relates to a train control
system using radio.
10 Background
[0002] In recent years, a train control system using
wireless communication called communication based train
control (CBTC) has been introduced. In the train control
system using wireless communication, various types of
15 information including location information and control
information about a train are transmitted and received by
wireless communication between a ground wireless base
station installed along a railroad line and an on-board
wireless station installed in a traveling train. In such a
20 train control system, it is difficult for one ground
wireless base station to cover the entire area along the
railroad line, and multiple ground wireless base stations
are required in the entire area along the railroad line.
The ground wireless base stations are installed at
25 intervals of several hundred meters, and the on-board
wireless station requires handover for switching the ground
wireless base station as a communication destination as a
train moves.
[0003] Patent Literature 1 discloses a train control
30 system in which an on-vehicle system of a train includes a
plurality of on-vehicle wireless communication means
corresponding to wireless communication using a plurality
of kinds of frequencies used by a plurality of wireless
3
base stations installed on the ground, thereby the train
control system smoothly and reliably performs handover of a
plurality of wireless base stations in a ground-side
system.
5
Citation List
Patent Literature
[0004] Patent Literature 1: Japanese Patent Application
Laid-open No. 2011-166361
10
Summary of Invention
Problem to be solved by the Invention
[0005] However, in a case where a train enters a route
of another company, there is a case where the handover
15 cannot be performed because the wireless communication
system is different from that of a route of the own
company. In such a case, there is a problem that the train
cannot enter the route of another company.
[0006] The present disclosure has been made to solve the
20 problem described above, and an object thereof is to
provide a train control system that can reliably perform
handover and smoothly enter a route of another company when
a train enters the route of another company.
25 Means to Solve the Problem
[0007] In order to achieve the above object, in a train
control system for a train that travels on a route
including a first route managed by a first railway operator
and a second route that is adjacent to the first route and
30 is managed by a second railway operator, a train control
system according to the present disclosure includes: a
first ground control device installed on the first route; a
first wireless base station installed on the first route
4
and connected to the first ground control device; a second
ground control device installed on the second route; and a
second wireless base station installed on the second route
and connected to the second ground control device, in which
5 the first ground control device and the second ground
control device can communicate with each other, the first
ground control device performs handover reservation between
with all the first wireless base stations disposed between
a first station at which the train stops, the first station
10 being installed on the first route, and a second station at
which the train stops, the second station being installed
on the second route and adjacent to the first station, and
the first ground control device further transmits, to the
second ground control device, a handover reservation
15 request between with all the second wireless base stations
disposed between the first station and the second station,
and the second ground control device transmits, to the
first ground control device, a result of the handover
reservation request between with all the second wireless
20 base stations disposed between the first station and the
second station.
Effects of the Invention
[0008] In a train control system for a train that
25 travels on a route including a first route managed by a
first railway operator and a second route that is adjacent
to the first route and is managed by a second railway
operator, a train control system according to the present
disclosure includes: a first ground control device
30 installed on the first route; a first wireless base station
installed on the first route and connected to the first
ground control device; a second ground control device
installed on the second route; and a second wireless base
5
station installed on the second route and connected to the
second ground control device, in which the first ground
control device and the second ground control device can
communicate with each other, the first ground control
5 device performs handover reservation between with all the
first wireless base stations disposed between a first
station at which the train stops, the first station being
installed on the first route, and a second station at which
the train stops, the second station being installed on the
10 second route and adjacent to the first station, and the
first ground control device further transmits, to the
second ground control device, a handover reservation
request between with all the second wireless base stations
disposed between the first station and the second station,
15 and the second ground control device transmits, to the
first ground control device, a result of the handover
reservation request between with all the second wireless
base stations disposed between the first station and the
second station. As a result, when the train enters a route
20 of another company, it is possible to reliably perform
handover and smoothly enter the route of another company.
Brief Description of Drawings
[0009] FIG. 1 is a diagram illustrating a schematic
25 configuration of a train control system 1 according to an
embodiment.
FIG. 2 is a sequence diagram illustrating an example
of an operation of the train control system 1 according to
the embodiment.
30 FIG. 3 is a diagram illustrating an example of
handover reservation of the train control system 1
according to the embodiment.
FIG. 4 is a diagram illustrating another example of
6
the handover reservation of the train control system 1
according to the embodiment.
FIG. 5 is a conceptual diagram illustrating control of
a train by the train control system 1 according to the
5 embodiment.
FIG. 6 is a diagram illustrating a general
configuration example of hardware for implementing the
train control system 1 according to the embodiment.
10 Description of Embodiments
[0010] Hereinafter, an embodiment of a train control
system according to the present disclosure will be
described with reference to the drawings. Note that, in
the drawings, identical or equivalent portions are denoted
15 by the same reference numerals.
[0011] FIG. 1 is a configuration diagram of a train
control system 1 according to an embodiment of the present
disclosure. The train control system 1 illustrated in FIG.
1 includes a train 10, a station 60, a station 61, a ground
20 control device 30, a ground control device 40, a wireless
base station 31, a wireless base station 32, a wireless
base station 41, and a wireless base station 42. The train
10 travels in a direction of an arrow 51 on a track 50.
In FIG. 1, in the train control system 1, a route on
25 which the train 10 travels is sectioned into a route A and
a route B. The route A and the route B are adjacent
routes. In FIG. 1, areas separated by a one dotted chain
line are individually illustrated as the route A and the
route B. The track 50 is laid across the route A and the
30 route B. The route A is a route managed by a first railway
operator, and the route B is a route managed by a second
railway operator.
[0012] On the route A, the station 60, the ground
7
control device 30, the wireless base station 31, and the
wireless base station 32 are installed. Further, on the
route B, the station 61, the ground control device 40, the
wireless base station 41, and the wireless base station 42
5 are installed. Here, the number of wireless base stations
disposed in each of the route A and the route B is two, but
the number of wireless base stations may be one or three or
more.
[0013] The train 10 includes an on-board control device
10 (not illustrated) for controlling traveling and stopping.
In order to control the train 10, the on-board control
device communicates with the ground control device 30 and
the ground control device 40 via an on-board wireless
station (not illustrated) installed in the train 10.
15 [0014] The ground control device 30 can communicate with
the wireless base station 31 and the wireless base station
32 via a ground network 21. The ground control device 30
transmits control information about the train 10 between
with the wireless base station 31 and the wireless base
20 station 32, and controls the wireless base stations at the
time of handover for switching the wireless base station as
a connection destination of the on-board wireless station
of the train 10 when the train 10 moves on the track 50.
For example, the on-board wireless station of the train 10
25 switches the connection destination of the wireless
communication from the wireless base station 31 to the
wireless base station 32 by performing the handover as the
train 10 moves on the track 50 in a direction from the
wireless base station 31 toward the wireless base station
30 32. In addition, the ground control device 30 receives
train location information from the train 10 via the
wireless base station 31 and the wireless base station 32,
and grasps a location of the train 10 from the received
8
train location information. On the basis of the location
information acquired from the train 10, stop limit
information about the train 10 is calculated, and the stop
limit information is transmitted to the train 10 via the
5 wireless base station 31 and the wireless base station 32.
[0015] The ground control device 40 can communicate with
the wireless base station 41 and the wireless base station
42 via a ground network 22. The ground control device 40
transmits control information about the train 10 between
10 with the wireless base station 41 and the wireless base
station 42, and controls the wireless base stations at the
time of handover for switching the wireless base station as
a connection destination of the on-board wireless station
of the train 10 when the train 10 moves on the track 50.
15 For example, the on-board wireless station of the train 10
switches the connection destination of the wireless
communication from the wireless base station 41 to the
wireless base station 42 by performing the handover as the
train 10 moves on the track 50 in a direction from the
20 wireless base station 41 toward the wireless base station
42. In addition, the ground control device 40 receives
train location information from the train 10 via the
wireless base station 41 and the wireless base station 42,
and grasps a location of the train 10 from the received
25 train location information. On the basis of the location
information acquired from the train 10, stop limit
information about the train 10 is calculated, and the stop
limit information is transmitted to the train 10 via the
wireless base station 41 and the wireless base station 42.
30 [0016] The station 60 is disposed on the route A. The
station 60 is a station closest to the route B among stop
stations disposed on the route A in a traveling direction
of the train 10. The station 61 is disposed on the route
9
B. The station 61 is a station closest to the route A
among stop stations disposed on the route B in the
traveling direction of the train 10.
[0017] The wireless base station 31 and the wireless
5 base station 32 can communicate with the ground control
device 30 via the ground network 21. The wireless base
station 31 and the wireless base station 32 are wireless
base stations disposed on the route A. In a case where the
train 10 standing at the station 60 travels in the
10 direction of the arrow 51, the wireless base station 31 and
the wireless base station 32 are disposed in this order
from a side closer to the station 60.
[0018] The wireless base station 41 and the wireless
base station 42 can communicate with the ground control
15 device 40 via the ground network 22. The wireless base
station 41 and the wireless base station 42 are wireless
base stations disposed on the route B. In a case where the
train 10 standing at the station 60 travels in the
direction of the arrow 51, the wireless base station 41 and
20 the wireless base station 42 are disposed in this order
from a side closer to the station 60.
[0019] The wireless base station 31, the wireless base
station 32, the wireless base station 41, and the wireless
base station 42 are wireless base stations installed
25 between the stations 60 and 61. In the traveling direction
of the train 10, the wireless base station 31, the wireless
base station 32, the wireless base station 41, and the
wireless base station 42 are disposed in this order from a
side closer to the station 60.
30 [0020] The ground control device 30 and the ground
control device 40 can communicate with each other via a
ground network 20. When the train 10 travels from the
station 60 disposed on the route A toward the station 61
10
disposed on the route B, the ground control device 30
transmits, to the ground control device 40, a handover
reservation request for establishing a state where the
train 10 can communicate with the wireless base station 41
5 and the wireless base station 42. In addition, when the
train 10 travels from the station 61 toward the station 60,
the ground control device 40 transmits, to the ground
control device 30, a handover reservation request for
establishing a state where the train 10 can communicate
10 with the wireless base station 32 and the wireless base
station 31. Details will be described later.
[0021] Here, handover reservation will be described.
The handover reservation is to enable the on-board wireless
station to communicate with the wireless base station. The
15 on-board wireless station communicates with the wireless
base station by using a wireless resource allocated by the
wireless base station. Examples of the wireless resource
include a time slot, a frequency slot, and the like. When
the wireless resource for communicating with the on-board
20 wireless station is allocated in the wireless base station,
the on-board wireless station and the wireless base station
can communicate with each other. Whereas, when the
wireless resource for communicating with the on-board
wireless station is not allocated in the wireless base
25 station, the on-board wireless station and the wireless
base station cannot communicate with each other. The
handover reservation request means that the on-board
wireless station requests allocation of the wireless
resource of the wireless base station as a handover
30 destination, to enable communication with the wireless base
station as the handover destination. The handover
reservation request is performed by the on-board control
device to the ground control device connected to the
11
wireless base station as the handover destination, via the
on-board wireless station, the wireless base station
currently performing communication, and the ground control
device connected to the wireless base station currently
5 performing communication. The ground control device
connected to the wireless base station as the handover
destination determines propriety of allocation of the
wireless resource of the wireless base station requested
for the handover. Handover reservation establishment means
10 a state where the wireless resource of the wireless base
station as the handover destination can be allocated, and
the on-board wireless station and the wireless base station
as the handover destination can communicate with each
other. A state where the handover reservation is not
15 established means a state where the wireless resource of
the wireless base station as the handover destination
cannot be allocated, and thus the on-board wireless station
and the wireless base station as the handover destination
cannot communicate with each other. Examples of the case
20 where the wireless resource cannot be allocated include a
case where there is no free space in the wireless resource
of the wireless base station, and a case where
communication between the ground control device and the
wireless base station cannot be properly performed due to a
25 communication load situation.
[0022] Here, in order to simplify the description, in
the traveling direction of the train 10, a path to the
station 60 on the route A will be expressed as a “path 71”,
a path from the station 60 to a boundary between the route
30 A and the route B will be expressed as a “path 72”, a path
from the boundary between the route A and the route B to
the station 61 will be expressed as a “path 73”, and a path
from the station 61 on the route B will be expressed as a
12
“path 74”. Further, a path between the station 60 and the
station 61 will be expressed as a “shared path 80”. The
shared path 80 is a path consisting of the path 72 and the
path 73.
5 [0023] Next, an operation of the train control system 1
according to the embodiment of the present disclosure will
be described. FIG. 2 is a sequence diagram illustrating an
example of operations of the train 10, the ground control
device 30, and the ground control device 40 when allocation
10 reservation of a wireless resource associated with handover
is performed.
[0024] First, the train 10 stops at the station 60, and
the on-board control device requests the ground control
device 30 for entry into the shared path 80 via the on15 board wireless station (S101). The ground control device
30 receives, from the train 10, a request for entry into
the shared path 80 (S102). The ground control device 30
transmits, to the train 10, a departure inhibition signal
indicating that the train does not depart from the station
20 60 (S103). The train 10 receives the departure inhibition
signal from the ground control device 30, and continues to
stand at the station 60 (S104). After transmitting the
departure inhibition signal to the train 10 in S103, the
ground control device 30 creates a handover destination
25 list of the route A in the shared path 80. Specifically,
the ground control device 30 creates the list of handover
destinations including all the wireless base stations
disposed on the path 72 of the route A. Here, the ground
control device 30 allocates a wireless resource of the
30 wireless base station 31 and the wireless base station 32,
establishes handover reservation, and creates a list of
handover destinations including the wireless base station
31 and the wireless base station 32 (S105). Next, the
13
ground control device 30 transmits a handover reservation
request of the path 73 to the ground control device 40
(S106). The ground control device 40 receives the handover
reservation request of the path 73 from the ground control
5 device 30 (S107). The ground control device 40 determines
wireless resource allocation propriety by setting all the
wireless base stations disposed on the path 73 of the route
B as the wireless base stations as the handover
destination. (S108). The ground control device 40
10 transmits, to the ground control device 30, a result of the
wireless resource allocation propriety of the path 73, that
is, a handover reservation result that is a result for the
handover reservation request from the ground control device
30 (S109). The ground control device 30 receives the
15 handover reservation result of the path 73 from the ground
control device 40 (S110). The ground control device 30
transmits, to the train 10, a signal indicating departure
inhibition cancellation propriety indicating propriety of
entry into the shared path 80 (S111). The train 10
20 receives a signal indicating the departure inhibition
cancellation propriety from the ground control device 30
(S112).
[0025] Next, a case where the handover reservation of
the shared path 80 is established will be described. FIG.
25 3 is a conceptual diagram illustrating that handover
reservation of the shared path 80 is established. When the
ground control device 30 receives the request for entry
into the shared path 80 from the train 10 described in S102
of FIG. 2, as described in S105 of FIG. 2, the ground
30 control device 30 determines whether it is possible to
allocate the wireless resource of all the wireless base
stations disposed on the route A in the shared path 80,
specifically, the wireless base station 31 and the wireless
14
base station 32. When the wireless resource of the
wireless base station 41 and the wireless base station 42
can be secured, the ground control device 30 performs
wireless resource allocation and establishes handover
5 reservation. In other words, the ground control device 30
establishes handover reservation of all the wireless base
stations disposed on the path 72 of the first railway
operator in the shared path 80. Next, as described in S106
of FIG. 2, the ground control device 30 requests the ground
10 control device 40 for handover reservation of all the
wireless base stations disposed on the route B in the
shared path 80, specifically, the wireless base station 41
and the wireless base station 42. In other words, the
ground control device 30 requests handover reservation of
15 all the wireless base stations disposed on the path 73 of
the second railway operator, which is an entry destination
of the train 10 in the shared path 80. The ground control
device 40 determines whether it is possible to allocate a
wireless resource of the wireless base station 41 and the
20 wireless base station 42 disposed on the path 73. When the
wireless resource of the wireless base station 41 and the
wireless base station 42 can be secured, the ground control
device 40 establishes handover reservation of the wireless
base station 41 and the wireless base station 42, and
25 transmits, to the ground control device 30, a handover
reservation result indicating that the handover reservation
is established, as a response to the handover reservation
request. As described in S110 of FIG. 2, when receiving
the handover reservation result indicating the result of
30 establishment of the handover reservation of the path 73
from the ground control device 40, the ground control
device 30 transmits the signal indicating the departure
inhibition cancellation propriety to the train 10 as
15
described in S111 of FIG. 2. When the ground control
device 30 receives the result of the handover reservation
establishment, the ground control device 30 transmits, to
the train 10, a departure permission signal indicating
5 cancellation of the departure inhibition for the station
60. Here, the signal indicating the departure inhibition
cancellation propriety is to be the departure permission
signal. The train 10 receives the departure permission
signal for the station 60 from the ground control device
10 30, and can depart from the station 60.
[0026] Next, a case where the handover reservation of
the shared path 80 is not established will be described.
FIG. 4 is a conceptual diagram illustrating that handover
reservation of the shared path 80 is not established. When
15 the ground control device 30 receives the request for entry
into the shared path 80 from the train 10, the ground
control device 30 establishes handover reservation of all
the wireless base stations disposed on the route A in the
shared path 80, specifically, the wireless base station 31
20 and the wireless base station 32. In other words, the
ground control device 30 establishes handover reservation
of all the wireless base stations disposed on the path 72
of the first railway operator in the shared path 80. Next,
the ground control device 30 requests the ground control
25 device 40 for handover reservation of all the wireless base
stations disposed on the route B in the shared path 80,
specifically, the wireless base station 41 and the wireless
base station 42. In other words, the ground control device
30 requests handover reservation of all the wireless base
30 stations disposed on the path 73 of the second railway
operator, which is an entry destination of the train 10 in
the shared path 80. The ground control device 40
determines whether it is possible to allocate a wireless
16
resource of the wireless base station 41 and the wireless
base station 42 disposed on the path 73. When the wireless
resource of the wireless base station 41 and the wireless
base station 42 disposed on the path 73 cannot be secured,
5 the ground control device 40 cannot perform the handover
reservation of the wireless base station 41 and the
wireless base station 42. The ground control device 40
transmits, to the ground control device 30, a handover
reservation result indicating that the handover reservation
10 is not established, as a response to the handover
reservation request. As described in S110 of FIG. 2, when
the ground control device 30 receives, from the ground
control device 40, the handover reservation result
indicating the result that the handover reservation of the
15 path 73 is not established, the ground control device 30
transmits, to the train 10, the signal indicating the
departure inhibition cancellation propriety, as illustrated
in S111 of FIG. 2. When the ground control device 30
receives the reservation result indicating that the
20 handover reservation is not established, the ground control
device 30 transmits, to the train 10, the departure
inhibition signal indicating that the departure inhibition
for the station 60 is continued. Here, the signal
indicating the departure inhibition cancellation propriety
25 is to be the departure inhibition signal. The train 10
receives the departure inhibition signal for the station 60
from the ground control device 30, and continues to stand
at the station 60.
[0027] Here, as an example in which the handover
30 reservation is not established, a case has been described
in which the handover reservation of the wireless base
station 41 and the wireless base station 42 of the path 73
is not established, but other cases may be adopted. For
17
example, a case may be adopted in which the handover
reservation is not established in any one of the wireless
base stations on the path 72 or the path 73. In addition,
as a cause of not establishing the handover, a case has
5 been described in which the wireless resource of the
wireless base station 41 and the wireless base station 42
cannot be secured, but other cases may be adopted. For
example, a case may be adopted in which the ground control
device 30 and the ground control device 40 cannot
10 communicate due to a system failure or the like.
[0028] Next, control of the train 10 permitted to enter
the shared path 80 will be described. FIG. 5 is a
conceptual diagram illustrating control of the train 10
permitted to enter the shared path 80. The train 10 is
15 controlled with a communication specification for traveling
on a route of the first railway operator until the train 10
stops at the station 60, that is, while the train 10 is
present on the path 71. Specifically, the communication
between the on-board control device of the train 10 and the
20 ground control device 30 is performed in a first
communication mode which is a communication specification
of the first railway operator, and the train 10 is
controlled.
[0029] The train 10 having received the departure
25 permission signal for the station 60 from the ground
control device 30 departs from the station 60 and enters
the path 72. At the time of entering the path 72, the onboard control device of the train 10 switches the
communication mode between with the ground control device
30 30 from the first communication mode to a degeneration mode
which is a second communication mode. Here, in the
degeneration mode, when the ground control device 30 and
the train 10 perform communication, information limited to
18
information necessary for controlling the train 10 is
transmitted and received. Examples of the information
necessary for controlling the train 10 include train
location information and stop limit information. The on5 board control device of the train 10 switches the
communication mode between with the ground control device
30 to the degeneration mode, and the train 10 travels on
the path 72 and enters the path 73. When the train 10
enters the path 73, the on-board control device of the
10 train 10 communicates with the ground control device 40 in
the degeneration mode. The on-board control device of the
train 10 switches the communication mode between with the
ground control device 40 from the degeneration mode, which
is the second communication mode, to a third communication
15 mode, while traveling on the path 73 or standing at the
station 61. The third communication mode is a
communication specification for traveling on a route of the
second railway operator. When the train 10 travels after
the path 74, communication with the ground control device
20 40 is performed in the third communication mode.
[0030] As described above, the train 10 travels in the
degeneration mode on the shared path 80. The degeneration
mode is a communication mode in which communication with
the ground control device 30 and the ground control device
25 40 is possible. Here, a reason for travelling in the
degeneration mode in the shared path 80 will be described.
There is a case where communication specifications of the
first railway operator and the second railway operator are
different. Examples in which the communication
30 specifications are different includes a case where the
communication specification of the first railway operator
is a specification in which large-capacity communication is
possible, while the communication specification of the
19
second railway operator is a specification in which largecapacity communication is not possible, and a case where
communication formats of the first railway operator and the
second railway operator are different. When the train 10
5 enters the path 73 in the first communication mode that is
the communication specification of the first railway
operator, the train 10 cannot communicate with the ground
control device 40 of the second railway operator that does
not support the first communication mode. When the train
10 10 cannot communicate with the ground control device 40,
the train stops in consideration of safety. Even if
reservation of the wireless base station disposed on the
path 73 is secured, when communication cannot be performed,
the train 10 stops. That is, the train 10 stops between
15 the station 60 and the station 61. In order to avoid such
a situation, the train 10 switches to the degeneration mode
in which communication with the ground control device 30
and the ground control device 40 is possible, to
communicate with the ground control device 30 and the
20 ground control device 40. By performing communication in
the degeneration mode, the train 10 can smoothly perform
handover when entering the path 73 from the path 72, and
the train 10 can be reliably controlled.
[0031] The ground control device 30 and the ground
25 control device 40 include at least a processor, a memory, a
receiver, and a transmitter, and an operation of each
device can be implemented by software. FIG. 6 is a diagram
illustrating a general configuration example of hardware
that implements the ground control device 30 and the ground
30 control device 40 of the train control system 1 according
to the embodiment. The device illustrated in FIG. 6
includes a processor 1001, a memory 1002, a receiver 1003,
and a transmitter 1004, and the processor 1001 performs
20
computation and control by software by using received data.
The memory 1002 stores received data or data necessary for
the processor 1001 to perform computation and control, and
also stores software. The receiver 1003 is an interface
5 that receives signals or information input to the ground
control device 30 and the ground control device 40. The
transmitter 1004 is an interface that transmits signals or
information output from the ground control device 30 and
the ground control device 40. Note that a plurality of
10 processors 1001, a plurality of memories 1002, a plurality
of receivers 1003, and a plurality of transmitters 1004 may
be provided.
[0032] In a train control system for a train that
travels on a route including a first route managed by a
15 first railway operator and a second route that is adjacent
to the first route and is managed by a second railway
operator, a train control system according to the
embodiment includes: a first ground control device
installed on the first route; a first wireless base station
20 installed on the first route and connected to the first
ground control device; a second ground control device
installed on the second route; and a second wireless base
station installed on the second route and connected to the
second ground control device, in which the first ground
25 control device and the second ground control device can
communicate with each other, the first ground control
device performs handover reservation between with all the
first wireless base stations disposed between a first
station at which the train stops, the first station being
30 installed on the first route, and a second station at which
the train stops, the second station being installed on the
second route and adjacent to the first station, and the
first ground control device further transmits, to the
21
second ground control device, a handover reservation
request between with all the second wireless base stations
disposed between the first station and the second station,
and the second ground control device transmits, to the
5 first ground control device, a result of the handover
reservation request between with all the second wireless
base stations disposed between the first station and the
second station. As a result, when the train enters a route
of the second railway operator from a route of the first
10 railway operator, it is possible to reliably perform
handover and smoothly enter the route of the second railway
operator.
[0033] In the train control system according to the
embodiment, the first ground control device can prevent the
15 train from stopping between a route of the first railway
operator and a route of the second railway operator, by
transmitting, to the train, a departure inhibition signal
indicating that departure from the first station is
inhibited.
20 [0034] In the train control system according to the
embodiment, when handover reservation between with all the
second wireless base stations is established in response to
the handover reservation request from the first ground
control device, the second ground control device transmits,
25 to the first ground control device, a handover reservation
result indicating that the handover reservation is
established. As a result, when the train enters a route of
the second railway operator from a route of the first
railway operator, it is possible to reliably perform
30 handover and smoothly enter the route of the second railway
operator.
[0035] In the train control system according to the
embodiment, when the first ground control device receives,
22
from the second ground control device, a handover
reservation result indicating that the handover reservation
is established, the first ground control device transmits a
departure permission signal indicating cancellation of the
5 departure inhibition to the train. As a result, when the
train enters a route of the second railway operator from a
route of the first railway operator, it is possible to
reliably perform handover and smoothly enter the route of
the second railway operator.
10 [0036] In the train control system according to the
embodiment, when departing from the first station or after
departing from the first station, the train switches a
communication mode between with the first ground control
device from a first communication mode, which is a normal
15 communication mode when the train travels on the first
route, to a second communication mode, which is a
communication mode including only information necessary for
controlling the train in the first ground control device
and the second ground control device. As a result, when
20 the train enters a route of the second railway operator
from a route of the first railway operator, it is possible
to reliably perform handover and smoothly enter the route
of the second railway operator.
[0037] In the train control system according to the
25 embodiment, the train switches a communication mode between
with the second ground control device from the second
communication mode to a third communication mode which is a
normal communication mode when the train travels on the
second route. As a result, it is possible to travel in a
30 communication mode corresponding to a route of the second
railway operator.
[0038] In the train control system according to the
embodiment, when handover reservation between with all the
23
second wireless base stations is not established in
response to the handover reservation request from the first
ground control device, the second ground control device
transmits, to the first ground control device, a handover
5 reservation result indicating that the handover reservation
is not established. As a result, it is possible to prevent
the train from stopping between a route of the first
railway operator and a route of the second railway
operator.
10 [0039] In the train control system according to the
embodiment, when the first ground control device receives
the handover reservation result from the second ground
control device, the first ground control device
continuously transmits a departure inhibition signal to the
15 train. As a result, it is possible to prevent the train
from stopping between a route of the first railway operator
and a route of the second railway operator.
Reference Signs List
20 [0040] 1 train control system; 10 train; 20, 21, 22
ground network; 30, 40 ground control device; 31, 32, 41,
42 wireless base station; 50 track; 51 arrow; 60, 61
station; 71, 72, 73, 74 path; 80 shared path; 1001
processor; 1002 memory; 1003 receiver; 1004 transmitter.
25
24
We Claim :
[Claim 1] A train control system for a train that travels
on a route including a first route managed by a first
railway operator and a second route that is adjacent to the
5 first route and is managed by a second railway operator,
the train control system comprising:
a first ground control device installed on the first
route;
a first wireless base station installed on the first
10 route and connected to the first ground control device;
a second ground control device installed on the second
route; and
a second wireless base station installed on the second
route and connected to the second ground control device,
15 wherein
the first ground control device and the second ground
control device can communicate with each other,
the first ground control device performs handover
reservation between with all the first wireless base
20 stations disposed between a first station at which the
train stops, the first station being installed on the first
route, and a second station at which the train stops, the
second station being installed on the second route and
adjacent to the first station, and the first ground control
25 device further transmits, to the second ground control
device, a handover reservation request between with all the
second wireless base stations disposed between the first
station and the second station, and
the second ground control device transmits, to the
30 first ground control device, a result of the handover
reservation request between with all the second wireless
base stations disposed between the first station and the
second station.
25
[Claim 2] The train control system according to claim 1,
wherein
the first ground control device transmits, to the
5 train, a departure inhibition signal indicating inhibition
of departure from the first station.
[Claim 3] The train control system according to claim 2,
wherein
10 when the handover reservation between with all the
second wireless base stations is established in response to
a handover reservation request from the first ground
control device, the second ground control device transmits,
to the first ground control device, a handover reservation
15 result indicating that handover reservation is established.
[Claim 4] The train control system according to claim 3,
wherein
when the first ground control device receives, from
20 the second ground control device, the handover reservation
result indicating that handover reservation is established,
the first ground control device transmits, to the train, a
departure permission signal indicating cancellation of
departure inhibition.
25
[Claim 5] The train control system according to claim 4,
wherein
when departing from the first station or after
departing from the first station, the train switches a
30 communication mode between with the first ground control
device from a first communication mode to a second
communication mode, the first communication mode being a
normal communication mode when the train travels on the
26
first route, and the second communication mode being a
communication mode including only information necessary for
controlling the train in the first ground control device
and the second ground control device.
5
[Claim 6] The train control system according to claim 5,
wherein
the train switches a communication mode between with
the second ground control device from the second
10 communication mode to a third communication mode, the third
communication mode being a normal communication mode when
the train travels on the second route.
[Claim 7] The train control system according to claim 2,
15 wherein
when the handover reservation between with all the
second wireless base stations is not established in
response to a handover reservation request from the first
ground control device, the second ground control device
20 transmits, to the first ground control device, a handover
reservation result indicating that handover reservation is
not established.
[Claim 8] The train control system according to claim 7,
25 wherein
the first ground control device continuously transmits
the departure inhibition signal to the train when the first
ground control device receives the handover reservation
result from the second ground control device.