JP6978238B2 - Base station equipment, communication systems, communication methods and programs - Google Patents

Description

The present invention relates to base station devices, communication systems, communication methods and programs, especially wireless communication systems used in mobile telephone networks.

A wireless communication system generally includes a plurality of base station devices. The service area in which the wireless communication system can provide the communication service is formed by arranging a plurality of coverages. Coverage refers to the range in which the radio waves transmitted by each base station device reach with a predetermined reception level. The range is also called a cell or a cover area. The cell may also refer to the base station device itself. The terminal device in the coverage area enables communication with the other party's device via the base station device. Further, a base station device that provides a communication service to a terminal device is called a serving cell, and a base station device installed within a predetermined range from the serving cell is called a peripheral base station. Peripheral base stations are also called adjacent cells.

Since communication is continued even if the terminal device during communication moves and exits from the coverage of the serving cell, the base station device related to the newly entering coverage is switched as a new serving cell. A series of processes for updating the serving cell is called a handover. Therefore, the serving cell notifies the connected terminal device of peripheral base station information as a candidate for a new serving cell. For example, in the mobile communication system described in Patent Document 1, the base station apparatus receives a request for handover of the mobile station apparatus to the base station apparatus, and transmits peripheral base station information held by the own apparatus. The mobile station device measures the signal from each peripheral base station device based on the peripheral base station information.

Japanese Unexamined Patent Publication No. 2009-81547

However, in the base station device installed in a mobile body such as a train or a bus, the peripheral base stations change sequentially with the movement. It is assumed that the mobile body stops at the stop and the occupant possessing the terminal device whose serving cell is the base station device installed in the mobile body leaves. When the peripheral base station information transmitted by the base station device installed in the mobile body is fixed, the terminal device discovers the base station device installed at the stop as a peripheral base station device that becomes a new serving cell. There are things you can't do. As a result of the inability to perform handover between the base station device installed in the stop and the base station device installed in the mobile body, the connection is interrupted. Further, it is assumed that a user who possesses a terminal device whose serving cell is a base station device installed in a stop area enters a mobile body. When the peripheral base station information transmitted by the base station device installed in the stop is fixed, the terminal device discovers the base station device installed in the mobile body as the peripheral base station device to be a new serving cell. There are things you can't do. In this case as well, the connection is interrupted as a result of the inability to perform handover between the base station device installed in the stop field and the base station device installed in the mobile body. In order to continue communication, the mobile station device needs to discover the base station device in the service area and reconnect with the found base station device.

The present invention has been made in view of the above points, and provides a base station apparatus, a communication system, a communication method, and a program capable of smoothly continuing communication regardless of entering and exiting a mobile body.

The present invention has been made to solve the above-mentioned problems, and one aspect of the present invention is a base station device installed in a mobile body, and the base stations installed in each of the stop areas scheduled to arrive. The identification information of the device and the validity information indicating its effectiveness are stored in the storage unit in association with each other, and the operation information indicating the current position of the moving body, the future stop place, and the estimated arrival time for each stop place. Is obtained from the operation management system, the stop place where the moving body stops next is specified based on the operation information, and the stop place is reached by the time when a person can leave the moving body at the stop place. The validity information associated with the identification information of the installed base station device is changed to the validity information indicating that the identification information is valid, and is associated with the validity information indicating that the identification information is valid. valid identification information is a base station apparatus that transmits including meta peripheral base station information.

According to the present invention, communication can be smoothly continued regardless of entering and exiting the mobile body.

It is a conceptual diagram which shows the 1st example of the communication system which concerns on 1st Embodiment. It is a conceptual diagram which shows the 2nd example of the communication system which concerns on 1st Embodiment. It is a schematic block diagram which shows the structural example of the base station apparatus which concerns on 1st Embodiment. It is a schematic block diagram which shows the structural example of the base station apparatus which concerns on 1st Embodiment. It is a schematic block diagram which shows the structural example of the terminal apparatus which concerns on 1st Embodiment. It is a figure which shows the 1st example of the peripheral base station information which concerns on 1st Embodiment. It is a figure which shows the 2nd example of the peripheral base station information which concerns on 1st Embodiment. It is a figure which shows the 3rd example of the peripheral base station information which concerns on 1st Embodiment. It is a figure which shows the 4th example of the peripheral base station information which concerns on 1st Embodiment. It is a figure which shows the example of the processing flow which concerns on 1st Embodiment. It is a conceptual diagram which shows the example of the communication system which concerns on 2nd Embodiment. It is a figure which shows the 1st example of the peripheral base station information which concerns on 2nd Embodiment. It is a figure which shows the 2nd example of the peripheral base station information which concerns on the 2nd Embodiment.

(First Embodiment)
Hereinafter, the first embodiment of the present invention will be described with reference to the drawings.
1 and 2 are conceptual diagrams showing an example of the communication system 1 according to the present embodiment.
1 and 2 show an example in which the communication system 1 is applied to a railway.
As shown in FIG. 1, the communication system 1 includes a plurality of base station devices 10-10, 10-20, 20-1, and 20-2. The base station devices 10-10, 10-20, 20-1, and 20-2 form a public communication network that enables communication using a predetermined wireless communication method (for example, LTE (Long Term Evolution)).
The base station devices 10-10 and 10-20 are installed in the trains 1 and 2 which are mobile bodies, respectively. The base station devices 20-1 and 20-2 are installed in the premises of stations 1 and 2, which are stop areas, respectively. ID10, ID20, ID1 and ID2 are assigned as the identification information of the base station devices 10-10, 10-20, 20-1 and 20-2, respectively. In the following description, a base station device installed in a mobile body such as the base station device 10-10 and 10-20 may be referred to as a "mobile cell", and the mobile cell may be collectively referred to as a base station device 10. Base station devices installed in a stop area such as base station devices 20-1 and 20-2 are referred to as "fixed cells" and may be collectively referred to as base station devices 20.

Base station devices 10-10 and 10-20 will be installed at stations 1 and 2 at stations 1 and 2 that will stop next, before passengers with terminal devices 30 can leave from trains 1 and 2. The peripheral base station information is updated so as to include the identification information of the base station devices 20-1 and 20-2. With the update, the peripheral base station information possessed by the base station devices 10-10 and 10-20 will include ID1 indicating the base station device 20-1 and ID2 indicating the base station device 20-2, respectively. The base station devices 10-10 and 10-20 notify the terminal device 30 that communicates with the own device of the updated peripheral base station information. Therefore, the terminal device 30 having the base station device 10-10 as the serving cell specifies the base station device 20-1 specified by ID1 as a candidate for the serving cell based on the notified peripheral base station information as the peripheral base station. Can be done. Therefore, when the passenger of the train 1 leaves the station 1 while possessing the operating terminal device 30, the terminal device 30 continues the communication by the handover from the base station device 10-10 to the base station device 20-1. can do.

On the other hand, the base station devices 20-1 and 20-2 are the base station devices 10 installed in the trains 1 and 2 until passengers can enter the trains that stop next at stations 1 and 2. The peripheral base station information is updated to include the identification information of -10 and 10-20. With the update, the peripheral base station information possessed by the base station devices 20-1 and 20-2 will include an ID 10 indicating the base station device 10-10 and an ID 20 indicating the base station device 10-20, respectively. The base station devices 20-1 and 20-2 notify the terminal device that communicates with the own device of the updated peripheral base station information. Therefore, the terminal device (not shown) having the base station device 20-1 as the serving cell refers to the notified peripheral base station information and surrounds the base station device 10-10 to which the ID 10 is assigned as a candidate for the serving cell. It can be specified as a base station. Therefore, even when the user enters the train 1 while possessing the terminal device from the station 1, the terminal device continues the communication by the handover from the base station device 20-1 to the base station device 10-10. be able to.

FIG. 2 shows a situation in which train 1 arrives at station 2 from station 1 and train 2 departs from station 2 over time. In this situation, the base station apparatus 10-10 updates from ID1 to ID2 as valid identification information included in the peripheral base station information (see FIG. 6 (ID10)). The base station device 10-10 notifies the terminal device 30 that communicates with the own device of the updated peripheral base station information. Therefore, the terminal device 30 whose serving cell is the base station device 10-10 identifies the base station device 20-2 to which the ID 2 is assigned as a candidate for the serving cell as the peripheral base station by referring to the notified peripheral base station information. can do. Therefore, even when the passenger of the train 1 leaves the station 2 while possessing the terminal device 30, the terminal device 30 communicates by handover from the base station device 10-10 to the base station device 20-2. You can continue.

On the other hand, the base station device 20-2 updates the peripheral base station information so as to include the identification information of the base station device 10-10 installed in the train 1. With the update, the peripheral base station information contained in the base station apparatus 20-2 will include the ID 10 (see FIG. 9 (ID 2)). The base station device 20-2 notifies the terminal device (not shown) that communicates with the own device of the updated peripheral base station information. Therefore, the terminal device having the base station device 20-2 as the serving cell refers to the notified peripheral base station information and specifies the base station device 10-10 to which the ID 10 is assigned as a candidate for the serving cell as the peripheral base station. be able to. Therefore, even when the user enters the train 1 from the station 2 while possessing the terminal device, the terminal device continues the communication by the handover from the base station device 20-2 to the base station device 10-10. be able to.
In the example shown in FIG. 2, the arrival of the train 2 at the new station and the arrival of the new train at the station 1 are not expected. Therefore, the peripheral base station information possessed by the base station devices 10-20 and 20-1 provided in the train 2 and the station 1, respectively, is not updated (see FIGS. 7 (ID 20) and 8 (ID 1)).

(Move cell)
Next, the configuration of the base station device 10 (moving cell) according to the present embodiment will be described.
FIG. 3 is a schematic block diagram showing a configuration example of the base station device 10 according to the present embodiment.
The base station apparatus 10 includes a control unit 12, a communication unit 14, and a storage unit 16.
The control unit 12 controls various functions of the base station apparatus 10. The control unit 12 includes a peripheral base station information update unit 122 and a communication control unit 124. The control unit 12 may be configured to include one or more control devices such as, for example, a CPU (Central Processing Unit). The control device reads a predetermined program stored in the storage unit 16 and performs a process instructed by an instruction described in the read program to realize the functions of the control unit 12 and other base station devices 10.

The peripheral base station information update unit 122 updates the peripheral base station information according to the positional relationship with the stop place where the mobile body in which the own device is installed will arrive next and the time change. In updating the peripheral base station information, the peripheral base station information update unit 122 is a base installed at the stop place where the mobile body stops next until the person can leave the mobile body. The identification information of the station apparatus 20 is included as at least a part of the peripheral base station information.

The stop place to be stopped next is the stop place to be stopped at the earliest time among the stop places where the moving body is scheduled to stop. If the moving object is a train or a bus, the next station or stop to arrive corresponds to the next stop. The ability of a person to leave a moving body corresponds to, for example, a state in which the moving body is stopped and the door of the closed moving body is opened.
In order to determine the opportunity to update the peripheral base station information, the peripheral base station information updating unit 122 acquires the operation information of the mobile body.

The operation information may include information on the current position of the moving body, a stop place to be a future destination of the moving body, and information on the estimated time of arrival for each stop place. The current position may be information that can at least identify the operating state of each moving object, such as a stop field or a movement section between adjacent stop fields, and is not necessarily information that indicates an absolute position such as latitude and longitude. It does not have to be. The peripheral base station information updating unit 122 receives, for example, operation information regarding the operation of the mobile body from the operation management system at predetermined time (for example, 10 to 30 seconds) from the operation management system via the communication unit 14. The operation management system is, for example, an automatic operation management system (PTC: Programmed Traffic Control) for a railway operator, a bus operator, or the like to manage or control the operation of a mobile body. Further, the operation information may be scheduled time information (timetable) indicating the arrival place for each moving object and the estimated arrival time at each arrival place. The peripheral base station information updating unit 122 can specify the moving section or the arrival place at the current time of the mobile body in which the own device is installed by referring to the scheduled time information.

The peripheral base station information updating unit 122 acquires the identification information of the base station apparatus 20 installed at the stop place to be stopped next as the identification information of the base station apparatus 20 effective as the peripheral base station information. For example, the peripheral base station information update unit 122 transmits a base station identification information request to a predetermined server device (not shown). The base station identification information request is a control signal indicating a request for identification information of the base station apparatus 20 at a certain position. Position information indicating the position of the base station apparatus may be added to the base station identification information request. The server device stores in advance a base station list configured by associating position information and identification information with each base station device 20. The server device refers to the base station list, identifies the identification information corresponding to the position information added to the base station identification information request received from the base station device 10, and transmits the identified identification information to the base station device 10. do. The server device is, for example, a network component housed in the core network of the public wireless network connected to the base station device 10. The peripheral base station information update unit 122 stores the identification information received from the server device in the storage unit 16 as valid identification information of the base station device 20. At this time, the peripheral base station information updating unit 122 may erase the identification information of the base station device 20 installed in the stop place where the peripheral base station information has already departed from the storage unit 16.

Further, in order to manage the identification information of the effective base station apparatus 20, the storage unit 16 has the identification information of the base station apparatus 20 installed in each of all the stop areas scheduled to arrive and the effectiveness of the identification information. It may be stored in advance in association with the sex information. Of the identification information, the peripheral base station information update unit 122 converts the validity information associated with the identification information of the base station device 20 installed in the stop place to be stopped next into the validity information indicating the validity. You may change it. At this time, the peripheral base station information update unit 122 may change the validity information associated with the identification information of the base station device 20 installed at the already-departed stop field to the validity information indicating invalidity. .. Therefore, the peripheral base station information update unit 122 does not have to acquire the identification information from the server device or the like or delete the invalid validity information.

The communication control unit 124 controls communication with the terminal device 30 in the coverage of the own device. The communication control unit 124 transmits a reference signal and peripheral base station information as clues for determining the necessity of handover. Here, the communication control unit 124 generates a reference signal for measuring the communication quality, and transmits the generated reference signal via the communication unit 14 every predetermined time (for example, 10 ms). Further, the communication control unit 124 generates peripheral base station information including valid identification information among the identification information stored in the storage unit 16. The communication control unit 124 transmits the generated peripheral base station information via the communication unit 14. The transmission of the reference signal and the peripheral base station information does not need to specify the terminal device 30 as the transmission destination, and it is sufficient that any terminal device within the coverage of the base station device 10 can receive the reference signal and the peripheral base station information.

The communication control unit 124 receives the measurement report from the terminal device 30. The measurement report includes the measurement result (for example, received power) of the reference signal received from each of the own device and the peripheral base station. The communication control unit 124 determines the necessity of handover based on the measurement result of each base station device. The communication control unit 124 determines, for example, that a handover is required when there is a peripheral base station that transmits a reference signal having a received power larger than the reference power, which is higher than the received power of the reference signal from the own device by a predetermined margin value. However, when such a peripheral base station does not exist, it is determined that handover is unnecessary. When determining that a handover is required, the communication control unit 124 determines, for example, the peripheral base station having the largest received power as the base station to be changed, and starts the handover process.

In the handover process, the communication control unit 124 generates a handover request message to the change destination whose change source is the own device, and transmits the generated handover request message to the peripheral base station of the change destination.
When the handover request permission message is received within a predetermined time (for example, 1 second) from the transmission of the handover request message, the communication control unit 124 transmits the handover instruction message to the terminal device 30 via the communication unit 14.

Further, when receiving a handover request message from another base station device (hereinafter, another station, not shown) with the other station as the change source and the own device as the change destination, the communication control unit 124 determines whether or not the handover can be executed. judge. The communication control unit 124 determines, for example, whether or not the capacity of the unused resource that is not used at that time is larger than the total capacity that is the sum of the communication capacity that can be added by the handover and the predetermined margin capacity. .. Further, the communication control unit 124 determines whether or not a synchronization notification has been received from a terminal device (hereinafter, a change source terminal, not shown) whose serving cell is another station. The synchronization notification is a signal indicating the success of the synchronization processing between the change source terminal and the own device. When the capacity of the unused resource is larger than the total capacity and the synchronization notification is received, the communication control unit 124 determines that the handover can be executed. When the capacity of the unused resources is equal to or less than the total capacity or the synchronization notification is not received, the communication control unit 124 determines that the handover is not executed. When the communication control unit 124 determines that the execution is feasible, the communication control unit 124 transmits a handover request permission message to another station.
After that, the communication control unit 124 transmits a path switching request indicating the change of the communication path of the change source terminal via the other station to the communication path via the own device to the core network.
When the handover completion message is received from the change source terminal, the measurement control information used by the change source terminal for communication with the own device is transmitted to the change source terminal. As a result, the handover process is completed, and the connection between the own device and the change source terminal is established.

The communication unit 14 wirelessly transmits and receives various data to and from the terminal device 30 within the coverage of its own device. The communication unit 14 down-converts the reception data in the radio frequency band transmitted by radio waves from the terminal device 30 to generate the reception data in the base frequency band, and outputs the generated reception data to the control unit 12. Further, the communication unit 14 up-converts the transmission data in the base frequency band input from the control unit 12 to generate the reception data in the radio frequency band, and transmits it by radio waves.
Further, the communication unit 14 is wirelessly or wiredly connected to other stations and the core network so as to be able to communicate with each other. The communication unit 14 communicates using, for example, a wireless communication method (for example, LTE).

The storage unit 16 stores data used for various processes in the base station apparatus 10 and data obtained by the processes. The storage unit 16 includes, for example, one or more storage media such as a ROM (Read Only Memory) and a RAM (Random Access Memory).

(Fixed cell)
Next, the configuration of the base station device 20 (fixed cell) according to the present embodiment will be described.
FIG. 4 is a schematic block diagram showing a configuration example of the base station device 20 according to the present embodiment.
The base station device 20 includes a control unit 22, a communication unit 24, and a storage unit 26.
The control unit 22 includes a peripheral base station information update unit 222 and a communication control unit 224. Since the configurations of the communication control unit 224, the communication unit 24, and the storage unit 26 of the base station device 20 are the same as the configurations of the communication control unit 124, the communication unit 14, and the storage unit 16 of the base station device 10 (FIG. 3), respectively. , Incorporate those explanations.

The peripheral base station information update unit 222 updates the peripheral base station information according to the positional relationship between the stop place where the own device is installed and the mobile body that stops next at the stop place and the time change. In updating the peripheral base station information, the peripheral base station information update unit 222 enters the moving body that stops next at the stop place where the own device is installed, until a person can enter from the stop place. The identification information of the base station apparatus 10 installed in the peripheral base station information is included as a part or all of the peripheral base station information.

The mobile body to be stopped next is a mobile body scheduled to be stopped at the earliest time among the mobile bodies scheduled to be stopped in the stop field where the base station device 20 is installed. When the moving body is a train or a bus, it corresponds to the earliest train or bus among the trains and buses scheduled to arrive. The ability of a person to enter from a stop corresponds to, for example, an open door of a closed mobile object.
In order to determine the opportunity to update the peripheral base station information, the peripheral base station information update unit 222 acquires the operation information of the mobile body in the same manner as the peripheral base station information update unit 122.

The peripheral base station information update unit 222 acquires the identification information of the base station device 10 installed in the mobile body to be stopped next as the identification information of the base station device 10 effective as a part of the peripheral base station information. The method of acquiring the identification information of the base station apparatus 10 may be the same as the method of acquiring the identification information of the base station apparatus 20 by the peripheral base station information updating unit 122.

Further, the storage unit 26 may store in advance the identification information of the base station device 10 installed in each of all the moving bodies scheduled to arrive and the validity information indicating the effectiveness thereof. .. Of the identification information, the peripheral base station information update unit 222 converts the validity information associated with the identification information of the base station device 10 installed in the mobile body to be stopped next into the validity information indicating the validity. change. At this time, the peripheral base station information update unit 222 changes the validity information associated with the identification information of the base station device 10 installed in the mobile body that has already departed to the validity information indicating invalidity.

(Terminal device)
Next, the configuration of the terminal device 30 according to the present embodiment will be described.
FIG. 5 is a schematic block diagram showing a configuration example of the terminal device 30 according to the present embodiment.
The terminal device 30 includes a control unit 32, a communication unit 34, and a storage unit 36. The terminal device 30 may be any electronic device capable of realizing a wireless communication function, such as a mobile phone (including a so-called smartphone), a tablet terminal device, or a personal computer.

The control unit 32 controls various functions of the terminal device 30. Functions to be controlled include communication functions. In communication control, the control unit 32 receives peripheral base station information from the serving cell via the communication unit 34. Any one of the base station devices 10 and 20 constituting the communication system 1 can be a serving cell, and a predetermined number of other base station devices can be peripheral base stations. The control unit 32 receives a reference signal transmitted from each base station device. The received reference signal may also include a reference signal transmitted by a base station apparatus other than the peripheral base station specified by the identification information included in the peripheral base station information. The control unit 32 measures a reception quality index value (for example, received power) for the reference signal received from each of the serving cell and the peripheral base station designated by the identification information included in the peripheral base station information. The control unit 32 generates a measurement report by associating the measurement result of the reference signal from each of the serving cell and the peripheral base station device with the identification information of the corresponding base station device. The control unit 32 transmits the generated measurement report to the serving cell.

As described above, the serving cell determines the necessity of handover based on the measurement report. In the handover process, the control unit 32 may receive a handover instruction message from the serving cell. The control unit 32 includes identification information of the base station device to which the handover is changed in the handover instruction message. The control unit 32 tries synchronization processing with the base station device to be changed. If the synchronization process is successful, the control unit 32 transmits a synchronization notification to the base station device to be changed. After that, the control unit 32 sets the communication parameters used for communication with the change destination base station device. Then, the control unit 32 transmits the handover completion message to the base station device of the change destination.

The communication unit 34 wirelessly transmits and receives various data to and from the serving cell. Further, the communication unit 34 wirelessly receives the reference signal transmitted from the peripheral base station. The communication unit 34 down-converts the reception data in the radio frequency band transmitted by radio waves from the terminal device 30 to generate the reception data in the base frequency band, and outputs the generated reception data to the control unit 32. Further, the communication unit 34 up-converts the transmission data in the base frequency band input from the control unit 32 to generate the reception data in the radio frequency band, and transmits it by radio waves.

The storage unit 36 stores data used for various processes in the terminal device 30 and data obtained by the processes. The storage unit 36 includes, for example, one or more storage media such as a ROM, a RAM, an HDD (Hard Disk Drive), a flash memory, and an EEPROM (Electrically Erasable Programmable Read Only Memory). The control unit 32 may be configured to include one or more control devices such as a CPU (Central Processing Unit). The control device reads a predetermined program stored in the storage unit 36, performs a process instructed by an instruction described in the read program, and realizes the functions of the control unit 32 and other terminal devices 30.

(Update of peripheral base station information)
Next, an example of updating peripheral base station information will be described.
At the end of the period during which the peripheral base station information update unit 122 makes the peripheral base station information updatable (hereinafter referred to as the first updatable period), a person from the mobile body moves at the first stop where the mobile body stops next. It suffices as long as it is possible to leave. The final stage is, for example, a time when a train (mobile body) stops at a station (hereinafter, a station of interest, corresponding to a first stop), and the entrance / exit changes from a closed state to an open state. The peripheral base station information update unit 122 determines the arrival of the train at the station of interest with reference to the operation information, and then detects a control signal indicating the opening of the doorway from the operation control device provided in the train. It can be determined as the time to update the base station information (hereinafter, the first update time).
Further, the first stop place to stop next is not necessarily the stop place geographically closest to the traveling direction. For example, when the moving body is a moving body that passes through a stop field on the route, such as a rapid train, the stop field that is passed does not correspond to the first stop field that stops next.

The beginning of the first renewable period may be a time when the person cannot leave the moving body in the second stopping place where the moving body stops before the first stopping place. The beginning is, for example, when the train (mobile body) is stopped at the front station (second stop) and the doorway changes from the open state to the closed state. The peripheral base station information updating unit 122 determines that the train is stopped at the previous station with reference to the operation information, and detects a control signal indicating the closure of the entrance / exit from the operation control device provided in the train. It can be determined as one update time.
Further, the second stop field that stops before is not necessarily the stop field that is geographically closest to the direction opposite to the traveling direction. For example, when the moving body is a moving body that passes through a stop field on the route, the stopped field that has passed does not correspond to the second stop field that stops before.

The first renewal period is not limited to the end or the beginning of the first renewable period, and may be any time within the first renewable period.
The first update time may be, for example, the time when the train arrives at the station of interest (first stop). The peripheral base station information update unit 122 can determine when the arrival of the train at the station of interest is determined as the first update time by referring to the operation information.
Further, the first update time may be a time when the time from the current time to the estimated time of arrival at the station of interest (first stop) becomes shorter than the threshold value of a predetermined time. For example, the peripheral base station information update unit 122 acquires time information indicating the current time from the timekeeping unit (timer, not shown), and specifies the estimated time of arrival at the station of interest with reference to the operation information. The peripheral base station information update unit 122 calculates the time from the current time to the specified estimated arrival time, and can determine the time when the calculated time becomes shorter than the threshold value of the predetermined time as the first update time. ..

Further, the first update time may be a time when the distance from the current position of the train (moving body) to the station of interest (first stop) becomes shorter than the threshold value of the predetermined distance. The peripheral base station information updating unit 122 acquires the current position of the train from, for example, a GPS (Global Positioning System) installed in the train in advance. The peripheral base station information updating unit 122 acquires, for example, map information indicating the operation route and the position of each station on the operation route, and calculates the distance from the attention station to the current position. The peripheral base station information update unit 122 can determine the time when the calculated distance becomes shorter than the threshold value of a predetermined time as the first update time.

On the other hand, at the end of the period during which the peripheral base station information updating unit 222 can update the peripheral base station information (hereinafter referred to as the second updatable period), the terminal stops next at the first stop where the base station device 20 is installed. It suffices as long as it is possible for a person to enter the moving object from the stop. For example, it is a time when a train (moving body) moving toward a station of interest (first stop) stops at the station of interest and the entrance / exit of the train changes from a closed state to an open state. The peripheral base station information update unit 222 updates the peripheral base station information when it receives a control signal indicating the opening of the doorway or a transmission notification of the control signal from the operation control device provided in the arriving train. Hereinafter, it can be determined as the second update time).

The beginning of the second renewable period may be a time when the moving body scheduled to arrive at the first stopping place cannot leave the moving body at the second stopping place where the moving body stops immediately before the first stopping place. .. For example, when the train (mobile body) is stopped at the front station (second stop), the entrance / exit changes from the open state to the closed state. The peripheral base station information update unit 222 detects the stop of the train at the previous station by referring to the operation information, and is a control signal indicating the closure of the entrance / exit from the operation control device provided in the stopped train, or a control signal thereof. When receiving the transmission notification of, it can be determined as the second update time.

The second renewal period is not limited to the end or the beginning of the second renewable period, and may be any time within the second renewable period.
For example, it may be the time when the train arrives at the station of interest (first stop). The peripheral base station information update unit 222 can determine when the arrival of the train at the station of interest is determined as the second update time by referring to the operation information.
Further, the second update time may be a time when the time from the current time to the estimated time of arrival at the station of interest (first stop) becomes shorter than the threshold value of the predetermined time. For example, the peripheral base station information update unit 222 acquires time information indicating the current time from the timekeeping unit (timer, not shown), and specifies the estimated time of arrival at the station of interest with reference to the operation information. The peripheral base station information update unit 222 calculates the time from the current time to the specified estimated arrival time, and can determine the time when the calculated time becomes shorter than the threshold value of the predetermined time as the second update time. ..

Further, the second update time may be a time when the distance from the current position of the train to the station of interest (first stop) becomes shorter than the threshold value of the predetermined distance. For example, a GPS is installed in a train in advance, and the GPS transmits the acquired current position of the train to the base station device 20. The peripheral base station information update unit 222 of the base station device 20 acquires map information indicating the operation route and the position of each station on the operation route, and calculates the distance from the attention station to the current position. The peripheral base station information update unit 222 can determine the time when the calculated distance becomes shorter than the threshold value of the predetermined time as the second update time.

(Processing flow)
Next, an example of the processing flow according to the present embodiment will be described. FIG. 10 is a sequence diagram showing an example of the processing flow according to the present embodiment. At the time when the process shown in FIG. 10 is started, the connection between the base station device 10-10 and the terminal device 30 has already been established, and the passenger of the train 1 possessing the terminal device 30 is at the station 1. Suppose you get off.

(Step S101) The peripheral base station information updating unit 122 of the base station apparatus 10-10 refers to the operation information provided to the own apparatus and determines the arrival of the train 1 at the station 1. After that, the peripheral base station information update unit 122 transmits a base station identification information request for the base station device 20-1 installed at the station 1 that has arrived at the server device to the server device. As a response, the peripheral base station information update unit 122 acquires the identification information ID 1 of the base station device 20-1 from the server device. The peripheral base station information update unit 122 updates the peripheral base station information so as to include the acquired identification information ID1. After that, the process proceeds to step S102.

(Step S102) The communication control unit 124 of the base station apparatus 10-10 transmits peripheral base station information. The control unit 32 of the terminal device 30 receives the peripheral base station information notified from the base station device 10-10. After that, the process proceeds to step S103.
(Step S103) The control unit 32 of the terminal device 30 measures the reception quality of the reference signal received from each of the base station devices indicated by the identification information included in the peripheral base station information. The control unit 32 transmits a measurement report indicating the reception quality of the reference signal for each base station device to the base station devices 10-10. After that, the process proceeds to step S104.

(Step S104) The communication control unit 124 of the base station apparatus 10-10 determines whether or not a handover is necessary based on the reception quality of the reference signal for each base station apparatus indicated by the measurement report received from the terminal apparatus 30, and the handover is required. When it is determined, the base station device 20-1 is determined as the change destination. After that, the communication control unit 124 starts the handover process between the change destination base station device 20-1 and the terminal device 30 with the base station device 10-10 as the change source. After the handover processing is completed, the connection between the terminal device 30 and the base station device 20-1 is established, and the terminal device 30 can communicate using the base station device 20-1 as a serving cell.

In the process of step S101, the peripheral base station information update unit 122 replaces the acquisition of the identification information ID 1 from the server device, and instead of acquiring the identification information ID 1, the validity information indicating invalidity associated with the identification information ID 1 stored in the storage unit 16 is obtained. , May be changed to validity information indicating validity. The communication control unit 124 may specify the peripheral base station information by adopting the identification information associated with the validity information indicating validity and ignoring the identification information associated with the validity information indicating invalidity. can.

Even in a situation where a person who owns the terminal device 30 in which the connection with the base station device 20-1 has already been established gets on the train 1 from the station 1, the terminal device 30 and the base station device are followed by the same procedure. A connection with 10-10 can be established. For example, when the peripheral base station information updating unit 122 of the base station apparatus 20-1 determines the arrival of the train 1 at the station 1, the peripheral base station information includes the identification information ID 10 of the base station apparatus of the train 1 and the terminal. It is transmitted to the device 30. The terminal device 30 measures the reception quality of the reference signal received from the base station device indicated by each of the identification information included in the peripheral base station information, and provides a measurement report showing the reception quality of each base station device 20-. Send to 1. Then, the communication control unit 224 of the base station device 20-1 determines the necessity of handover based on the reception quality of each base station device indicated by the measurement report received from the terminal device 30, and changes when it is determined that the handover is necessary. The base station device 10-10 is defined as the first. After that, the communication control unit 224 starts the handover process between the change destination base station device 10-10 and the terminal device 30 with the base station device 20-1 as the change source. After the handover processing is completed, the connection between the terminal device 30 and the base station device 10-10 is established.

As described above, the base station device 10 according to the present embodiment is a base station device installed on a mobile body, and a person can leave the mobile body at a stop where the mobile body stops next. By then, the peripheral base station information is updated so as to include the identification information of the base station device 20 installed at the stop. Further, the base station device 10 notifies the terminal device 30 that communicates the peripheral base station information with the own device, and enables handover to any of the base station devices indicated by the identification information included in the peripheral base station information. ..
According to this configuration, when a person who possesses a terminal device 30 connected to the base station device 10 leaves the mobile body, the base station device 20 becomes a candidate for a handover change destination as a peripheral base station. Therefore, by ensuring the handover to the base station device 20 installed in the stop area where the person leaves, the communication by the terminal device 30 is not interrupted. Therefore, even when leaving the mobile body, communication is smoothly performed.

Further, the base station device 10 is installed in the first stop after the person cannot leave the mobile in the second stop where the mobile stops before the first stop. The peripheral base station information is updated so as to include the identification information of the base station apparatus 20.
According to this configuration, the peripheral base station information is updated between the time when the person cannot leave the second stop and the time when the person can leave the first stop. Therefore, the peripheral base station information updated to the terminal device 30 at the time when the person leaves the first stop is more reliably provided. Therefore, the handover to the base station apparatus 20 installed in the first stop can be made more reliable.

The base station device 20 is a base station device installed in a stop field where a mobile body stops, and is a mobile body until a person can enter the mobile body that stops next in the stop field from the stop field. Update peripheral base station information to include the identification information of the installed base station equipment. Further, the base station device 20 notifies the terminal device that communicates with the peripheral base station information to the terminal device that communicates with the own device, and enables handover to any of the base station devices indicated by the identification information included in the peripheral base station information.
According to this configuration, when a person possessing a terminal device 30 connected to the base station device 20 enters a mobile body, the base station device 10 becomes a candidate for a handover change destination as a peripheral base station. Therefore, the handover to the base station device 10 installed in the mobile body to which the person enters is ensured, so that the communication by the terminal device 30 is not interrupted. Therefore, even when entering a moving body, communication is smoothly performed.

Further, the base station device 20 is installed in the mobile body after the mobile body cannot enter the mobile body in the second stop field where the mobile body stops before the first stop field. The peripheral base station information is updated to include the identification information of 10.
According to this configuration, the peripheral base station information is updated from the time when the person cannot enter at the second stop to the time when the person can enter at the first stop. Therefore, the peripheral base station information updated to the terminal device 30 at the time when a person enters at the first stop is more reliably provided. Therefore, the handover to the base station device 10 installed in the mobile body can be made more reliable.

(Second embodiment)
Next, a second embodiment of the present invention will be described. The same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be incorporated. Further, the hardware configurations of the base station devices 10 and 20 constituting the communication system 1 according to the present embodiment are substantially the same as the hardware configurations of the base station devices 10 and 20 according to the first embodiment. In the following description, the differences from the first embodiment will be mainly described.

FIG. 11 is a conceptual diagram showing an example of the communication system 1 according to the present embodiment.
In the present embodiment, a plurality of base station devices 20 are distributed and arranged at different positions in a stop field where the mobile body is stopped, and a plurality of base station devices 10 are dispersed and arranged at different positions in one mobile body. Be placed. In the example shown in FIG. 11, three base station devices 20-1 (ID1), 20-2 (ID2), and 20-3 (ID3) on the platform of station 1 are arranged in the longitudinal direction. Further, in the central portion of each of the vehicles 1, 2 and 3 of the train 1 stopped at the station 1, the base station device 10-10 (ID10), the base station device 10-20 (ID20), and the base station device 10- 30 (ID30) is installed. When the vehicle is stopped at the station 1, the positions of the vehicles 1, 2 and 3 are the positions facing the base station devices 20-1 (ID1), 20-2 (ID2) and 20-3 (ID3), respectively. ..

As an example, it is assumed that in the base station apparatus 10-20, only the identification information of one base station apparatus 20-1 is adopted as valid peripheral base station information. In this case, the other base station devices 20-2 and 20-3 are not candidates for the base station device to which the handover is changed. When the output from each base station device is small, the terminal device 30 cannot receive the reference signal from the base station device 20-1 with sufficient strength. Therefore, when a person who possesses the terminal device 30 from the vehicle 2 gets off at the station 1, the handover to the base station device 20-1 may fail and the communication may be interrupted.

Therefore, in the present embodiment, the peripheral base station information updating unit 122 of the base station device 10 installed in the mobile body is the most in the own device when the mobile body is stopped, among the plurality of base station devices arranged in the stop field. Update peripheral base station information to include identification information for base station equipment located in close proximity. For example, upon arrival of the train 1 at the station 1, the base station apparatus 10-10 (ID10) includes the identification information ID1 of the base station apparatus 20-1 in the peripheral base station information. At this time, the base station apparatus 10-20 (ID 20) includes the identification information ID 2 of the base station apparatus 20-2 in the peripheral base station information. Further, the base station apparatus 10-30 (ID30) includes the identification information ID3 of the base station apparatus 20-3 in the peripheral base station information (FIG. 12).
When a passenger possessing a terminal device 30 that communicates via the base station device 10-20 gets off from the vehicle 2 to the station 1, the base station closest to the base station device 10-20 as a candidate for changing the base station. The device 20-2 is a candidate for the change destination of the handover. Therefore, there is a low possibility that the handover will fail and the communication will be interrupted.

The storage unit 16 or the server device identifies the base station device 20 arranged at the position closest to the position in each stop for each position (for example, a vehicle) in which the base station device 10 is installed on the mobile body. The information may be set in advance. Thereby, the peripheral base station information updating unit 122 can specify the identification information of the base station device arranged at the position closest to the own device of the mobile body in the stop field where the mobile body arrives.
The storage unit 16 or the server device identifies a plurality of base station devices 20 arranged within a predetermined range from that position at each stop for each position where the base station device 10 is installed on the mobile body. The information may be set in advance. As a result, the peripheral base station information updating unit 122 can specify the identification information of a plurality of base station devices arranged at positions close to the mobile device's own device in the stop field where the mobile body arrives.
Further, the storage unit 16 or the server device may be preset with the identification information of all the base station devices 20 arranged in each stop area. Thereby, the peripheral base station information updating unit 122 can specify the identification information of all the base station devices in the stop place where the mobile body arrives.

When the number of base station devices specified for each stop field is plural, handover to any of the base station devices is possible. Therefore, even when a person who has left the mobile body moves in the stop, the terminal device 30 possessed by the person can perform further handover. Therefore, the possibility that the communication is interrupted in the terminal device 30 is further reduced. When the number of the specified base station devices is plural, the base station device having a low communication quality of the received reference signal is rejected as the change destination of the handover. Therefore, the increase in the load of the entire communication system 1 is increased. It is minor.

Further, as effective identification information in the peripheral base station information stored in the storage unit 16, the identification information of all the base station devices 10 installed in the mobile body is further included regardless of the stop place where the mobile body stops. You may. As a result, when the person possessing the terminal device 30 re-enters the moving body from the stop field, or even when moving inside the moving body, these base station devices 10 can be candidates for the change destination of the handover. Therefore, the possibility that the communication is interrupted in the terminal device 30 is further reduced.

Next, it is assumed that in the base station apparatus 20-3 arranged in the stop field, only the identification information of one base station apparatus 10-10 is adopted as valid peripheral base station information. In this case, the other base station devices 10-20 and 10-30 are not the base station devices to which the handover is changed. Therefore, when a person who possesses the terminal device 30 connected to the base station device 20-3 gets on the vehicle 3 from the station 1, the handover to the base station device 10-10 fails and the communication is interrupted. There is.

Therefore, in the present embodiment, the peripheral base station information updating unit 222 of the base station device 20 installed in the stop field is the most in the own device when the mobile body is stopped, among the plurality of base station devices arranged in the mobile body. Update peripheral base station information to include identification information for base station equipment located in close proximity. For example, upon arrival of the train 1 at the station 1, the base station apparatus 20-1 (ID1) includes the identification information ID 10 of the base station apparatus 10-10 in the peripheral base station information. At this time, the base station apparatus 20-2 (ID2) includes the identification information ID 20 of the base station apparatus 10-20 in the peripheral base station information. Further, the base station apparatus 20-3 (ID3) includes the identification information ID 30 of the base station apparatus 10-30 in the peripheral base station information (FIG. 13).

Therefore, when a person who possesses the terminal device 30 communicating via the base station device 20-3 gets on the vehicle 3 from the station 1, the base station device 20-3 is the most suitable candidate for changing the base station. The nearby base station apparatus 10-30 is a candidate for the change destination of the handover. Therefore, there is a low possibility that the handover will fail and the communication will be interrupted.

The storage unit 26 or the server device is installed at a position (for example, a vehicle) closest to the own device among the base station devices 10 installed in the mobile body stopped at the stop where the base station device 20 is installed. The identification information of the base station device 10 may be set in advance for each mobile body. As a result, the peripheral base station information update unit 222 can specify the identification information of the base station device arranged at the position closest to the own device when the mobile body arriving next is stopped.
In the storage unit 26 or the server device, among the base station devices 10 installed in the mobile body stopped at the stop where the base station device 20 is installed, the base station device installed within a predetermined range from the own device is used. The identification information of 10 may be set in advance for each moving body. As a result, the peripheral base station information update unit 222 can specify the identification information of the plurality of base station devices arranged at positions close to the own device when the mobile body is stopped.
Further, the storage unit 26 or the server device may be preset with the identification information of all the base station devices 10 arranged in each mobile body. As a result, the peripheral base station information update unit 222 can specify the identification information of all the base station devices in the mobile body arriving at the stop.

When the number of base station devices specified for each mobile unit is plurality, handover to each base station device is possible. Therefore, even when a person who has entered the moving body from the stop field moves in the moving body, the terminal device 30 possessed by the person can perform further handover. Therefore, the possibility that the communication is interrupted in the terminal device 30 is further reduced. When the number of the specified base station devices is plural, the base station device having a low communication quality of the received reference signal is rejected without being selected as the change destination of the handover. Therefore, the load on the network and processing of the communication system 1 as a whole does not need to be significantly increased.

Further, as effective identification information in the peripheral base station information stored in the storage unit 16, the identification information of all the base station devices 20 installed in the stop field is further included regardless of the mobile body stopped in the stop field. You may. As a result, when the person possessing the terminal device 30 re-enters the stop field from the mobile body, or even when the person moves in the stop field, these base station devices 10 can be candidates for the handover change destination. Therefore, the possibility that the communication is interrupted in the terminal device 30 is further reduced.

Multiple systems of mobiles may arrive and depart at the stop. For example, trains on multiple lines arrive and depart on the platforms of major stations in large cities, and some passengers may transfer between trains on different lines. In addition, even if it is one line, trains with different operation types (for example, normal, rapid, express, limited express, etc.) or different final destinations (terminal stations) arrive and depart, and some passengers have different operation types. You may change trains at your final destination.

Therefore, the peripheral base station information update unit 122 of the base station device 10 installed in the mobile body identifies information of the base station device installed in another mobile body that allows the mobile body to enter from the stop after the mobile body has stopped. Peripheral base station information may be updated to include more. The other mobiles that can enter from the stop are other mobiles whose doorways are opened after the arrival time at the stop where the mobile on which the base station device 10 is installed arrives. More specifically, it corresponds to a train of another line departing after the arrival time at the arrival station, or a train having a different operation type or destination on the same line. The train corresponding to the other mobile body may include a train that has already arrived at the arrival station and has an open doorway before the train that installs the base station device 10 arrives.
In the storage unit 16 or the server device, the identification information of the base station device 10 to be arranged in the mobile body of another system scheduled to depart within a predetermined time from the estimated time of arrival is previously stored in the storage unit 16 or the server device for each stop place where the mobile body arrives. You may set it. As a result, the peripheral base station information update unit 122 can specify the identification information of the base station device of another system scheduled to depart after the arrival time at the stop place where the mobile body arrives.

For example, when the train 1 arrives at the station 1, the base station device 10-20 (ID20) is installed on the train 2 (not shown) scheduled to depart after the arrival time (not shown). Identification information (not shown) is included in the peripheral base station information. Therefore, the base station apparatus 40 is included as a candidate for the change destination of the handover. Therefore, when a passenger who gets off the train 1 at the station 1 transfers to the train 2, the terminal device 30 possessed by the passenger can perform a handover with the base station device 40 installed in the train 2 as the change destination. Therefore, the possibility that the communication is interrupted in the terminal device 30 is reduced.

On the other hand, the peripheral base station information update unit 222 of the base station apparatus 20 installed in the stop field where the mobile bodies of the plurality of systems can be stopped is the mobile body which stops next at the stop field for each of the plurality of systems. In addition, the peripheral base station information is updated to include the identification information of the base station device installed in the mobile body until a person can enter from the stop.
In the storage unit 26 or the server device, for each of the plurality of systems, the base station is installed for each mobile body arriving at the estimated time of arrival at the stop place where the base station device 20 is installed. The identification information of the device 10 may be set in advance. As a result, the peripheral base station information update unit 222 sequentially identifies the identification information of the base station device installed in the mobile body to be stopped next for each of the plurality of systems in the stop field where the mobile body arrives. Can be done.

For example, at the time 1 when the train 1 operating the line 1 arrives at the station 1, in addition to the identification information of the base station device 10 installed in the train 1, it is installed in the train 2 operating the next line 2 scheduled to arrive. Identification information of the base station apparatus 40 (not shown) is included in the peripheral base station information. Therefore, both the base station devices 10 and 40 are included as candidates for the change destination of the handover. Therefore, regardless of whether the person boarding from the station 1 boarded the trains 1 and 2, the base station device installed on the train boarded from the base station device 20 installed in the station 1 connected to the terminal device 30. Handover to is possible. Therefore, the possibility that the communication is interrupted in the terminal device 30 is reduced.

As described above, the base station device 10 according to the present embodiment is installed at a position within a predetermined range from the own device when the mobile body is stopped, among the plurality of base station devices 20 arranged in the stop field. The peripheral base station information is updated so as to include the identification information of the base station device 20.
With this configuration, the base station device 20 that is close to the base station device 10 when the mobile body is stopped becomes a candidate for the change destination of the handover. Therefore, when the person who possesses the terminal device 30 connected to the base station device 10 leaves the mobile body to the stop, the handover to the base station device 20 can be made more reliable.

Further, after the mobile body has stopped, the base station device 10 updates the peripheral base station information so as to further include the identification information of the base station device installed in the other mobile body that can enter from the stop field.
With this configuration, the base station device installed in another mobile body that allows the mobile body to enter from the stopped place becomes a candidate for the change destination of the handover. Therefore, even if a person who possesses the terminal device 30 connected to the base station device 10 leaves the mobile body and then enters another mobile body, the person who has the terminal device 30 enters the base station device installed in the other mobile body. The handover can be made more reliable.

Further, the base station device 20 includes identification information of the base station device 10 installed at a position within a predetermined range from the own device when the mobile body is stopped, among the plurality of base station devices 10 arranged on the mobile body. Update the peripheral base station information to.
With this configuration, the base station device 10 that is close to the base station device 20 when the mobile body is stopped becomes a candidate for the change destination of the handover. Therefore, when a person who possesses the terminal device 30 connected to the base station device 20 enters the mobile body from the stop, the handover to the base station device 10 can be made more reliable.

Further, in the base station device 20, the mobile body of a plurality of systems can be stopped in the stop field, and each system moves until a person can enter the mobile body to be stopped next in the stop field from the stop field. The peripheral base station information is updated so as to include the identification information of the base station device 10 installed on the body.
With this configuration, when a person having a terminal device 30 connected to the base station device 20 can enter the mobile body for each of the plurality of systems, the base station device 10 installed in the mobile body of each system is a peripheral base. As a station, it is a candidate for a change destination of handover. Therefore, even when a person enters a mobile body of any system, the handover to the base station device 10 installed in the mobile body to be the approach destination is ensured.

Although the embodiments of the present invention have been described above with reference to the drawings, the specific configuration is not limited to the above, and various design changes and the like are made without departing from the gist of the present invention. It is possible. Some of the configurations described in the embodiments described above may be modified, omitted or combined, or other configurations may be added.

For example, in the above-described embodiment, the case where the moving body and the stop are mainly trains and stations is taken as an example, but the present invention is not limited to this. The moving object may be any movable object that allows an unspecified person to enter and leave and has a space in which the entering person is located. The moving body may be, for example, a diesel railcar, a passenger car, a shared vehicle such as a bus or a monorail, a shared ship such as a water bus or a ferry boat, or an aircraft such as an airplane or a helicopter. The stop is a predetermined place where each moving object stops. The stop may be a stop, a bus terminal, a boarding / alighting place, or an airport.
Further, the update timing of the peripheral base station information described in the first embodiment may be applied to the second embodiment.

The above-described embodiment can also be implemented in the following embodiments.
(1) A base station device installed in a mobile body, which is a base station device installed in the stop field until a person can leave the mobile body in the stop field where the mobile body stops. A base station device that updates peripheral base station information so as to include identification information and transmits the updated peripheral base station information.

(2) In the second stop field where the mobile body stops in front of the stop field, the peripheral base station information is updated so as to include the identification information after a person cannot leave the mobile body. (1) Base station equipment.

(3) Among the plurality of base station devices arranged in the stop field, the peripheral base station so as to include identification information of the base station device installed at a position within a predetermined range from the own device when the mobile body is stopped. The base station device of (1) or (2) for updating information.

(4) From (1), after the mobile body is stopped, the peripheral base station information is updated so as to further include the identification information of the base station device installed in the other mobile body that can enter from the stop field. Any of the base station devices in (3).

(5) A base station device installed in a stop field where a moving body stops, and is installed in the moving body until a person can enter the moving body stopped in the stop field from the stop field. A base station device that updates peripheral base station information so as to include identification information of the base station device, and transmits the updated peripheral base station information.

(6) Identification information of the base station device installed in the mobile body after the mobile body becomes inaccessible to the mobile body in the second stop field where the mobile body stops in front of the stop field. (5) Base station apparatus for updating peripheral base station information so as to include.

(7) Of the plurality of base station devices arranged on the mobile body, the peripheral base station so as to include identification information of the base station device installed at a position within a predetermined range from the own device when the mobile body is stopped. The base station device of (5) or (6) for updating information.

(8) In the stop field, a plurality of systems of mobile bodies can be stopped, and for each of the systems, the mobile body that stops at the stop field can be entered by a person from the stop field. The base station device according to any one of (5) to (7), which updates the peripheral base station information so as to include the identification information of the installed base station device.

(9) Identification information of the base station device installed in the mobile body, which is the base station device installed in the stop field before the mobile body can exit the mobile body in the stop field where the mobile body stops. The first base station device that updates the first peripheral base station information so as to include, and transmits the updated first peripheral base station information, and the base station device installed in the stop area where the mobile body stops. The second peripheral base station information is updated so as to include the identification information of the base station apparatus installed in the moving body until the moving body stopped at the stopping place can enter from the stopping place. A communication system comprising a second base station apparatus for transmitting the updated second peripheral base station information.

(10) A communication method for a base station device installed in a mobile body, which is a base station device installed in the stop field until the mobile body can exit the mobile body in the stop field. A communication method in which peripheral base station information is updated so as to include the identification information of the above, and the updated peripheral base station information is transmitted.

(11) It is a communication method of a base station device installed in a stop field where a mobile body stops, and is installed in the mobile body until it becomes possible to enter the mobile body stopped in the stop field from the stop field. A communication method in which peripheral base station information is updated so as to include identification information of the peripheral base station device, and the updated peripheral base station information is transmitted.

(12) Identification information of the base station device installed in the stop field before the computer of the base station device installed in the mobile body can exit from the mobile body in the stop field where the mobile body stops. A program for executing a procedure for updating peripheral base station information so as to include, and a procedure for transmitting the updated peripheral base station information.

(13) The base station installed in the mobile body before the mobile body stopped in the stop field can enter the computer of the base station device installed in the stop field where the mobile body stops. A program for executing a procedure for updating peripheral base station information so as to include device identification information and a procedure for transmitting the updated peripheral base station information.

Note that the base station devices 10, 20 and a part of the terminal device 30, for example, the control units 12, 22, and 32 may be realized by a computer. In that case, the program for realizing this control function may be recorded on a computer-readable recording medium, and the program recorded on the recording medium may be read by a computer system and executed.
Further, a part or all of the base station devices 10, 20 and the terminal device 30 in the above-described embodiment may be realized as an integrated circuit such as an LSI (Large Scale Integration). Each functional block of a part of the base station devices 10, 20 and the terminal device 30 may be individually made into a processor, or a part or all of them may be integrated into a processor. Further, the method of making an integrated circuit is not limited to the LSI, and may be realized by a dedicated circuit or a general-purpose processor. Further, when an integrated circuit technology that replaces an LSI appears due to advances in semiconductor technology, an integrated circuit based on this technology may be used.

1 ... Communication system, 10 (10-10, 10-20, 10-30) ... Base station device, 12 ... Control unit, 122 ... Peripheral base station information update unit, 124 ... Communication control unit, 14 ... Communication unit, 16 ... Storage unit, 20 (20-1, 20-2, 20-3) ... Base station device, 22 ... Control unit, 222 ... Peripheral base station information update unit, 224 ... Communication control unit, 24 ... Communication unit, 26 ... Storage unit, 30 ... Terminal device, 32 ... Control unit, 34 ... Communication unit, 36 ... Storage unit

Claims (12)

It is a base station device installed in a mobile body.
The identification information of the base station equipment installed in each of the stop areas scheduled to arrive and the validity information indicating its effectiveness are associated and stored in the storage unit.
The operation information indicating the current position of the moving body, the future stop place, and the estimated time of arrival for each stop place is acquired from the operation management system.
Based on the operation information, the stop place where the moving body will stop next is specified.
By the time a person can leave the moving object at the stop,
The validity information associated with the identification information of the base station equipment installed at the stop is changed to the validity information indicating that the identification information is valid.
A base station device that transmits peripheral base station information, including valid identification information associated with validity information that indicates that it is valid. In the second stop where the mobile stops before the stop, the peripheral base station information is updated to include the valid identification information after a person cannot leave the mobile. The base station apparatus according to claim 1. Of the plurality of base station devices arranged in the stop field to be stopped next,
The base station device according to claim 1 or 2, wherein the peripheral base station information is updated so as to include the identification information of the base station device installed at a position within a predetermined range from the own device when the mobile body is stopped. 1 The base station apparatus according to any one of claims 3. A base station device installed at a stop where a mobile body stops.
The identification information of the base station device installed in each of the moving objects to be arrived is associated with the validity information indicating its effectiveness and stored in the storage unit.
Obtain operation information from the operation management system that shows the current position of the moving object, future stop areas, and estimated time of arrival for each stop area.
Based on the above operation information, identify the moving object that will stop next at the stop where the own device is installed.
By the time a person can enter the moving object from the stop
The validity information associated with the identification information of the base station device installed in the mobile body is changed to the validity information indicating that the identification information is valid.
A base station device that transmits peripheral base station information, including valid identification information associated with validity information that indicates that it is valid. In the second stop where the mobile stops in front of the stop, the identification information of the base station device installed in the mobile after the person becomes inaccessible to the mobile is included. The base station apparatus according to claim 5, wherein the peripheral base station information is updated. Of the plurality of base station devices arranged in the mobile body,
The base station device according to claim 5 or 6, wherein the peripheral base station information is updated so as to include the identification information of the base station device installed at a position within a predetermined range from the own device when the mobile body is stopped. The stop field is capable of stopping multiple systems of mobiles.
For each system, the peripheral base station information is updated to include the identification information of the base station device installed in the mobile body until a person can enter the mobile body stopped at the stop field from the stop field. do,
The base station apparatus according to any one of claims 5 to 7. It is a base station device installed in a mobile body.
The identification information of the base station equipment installed in each of the stop areas scheduled to arrive and the validity information indicating its effectiveness are associated and stored in the storage unit.
The operation information indicating the current position of the moving body, the future stop place, and the estimated time of arrival for each stop place is acquired from the operation management system.
Based on the operation information, the stop place where the moving body will stop next is specified.
By the time a person can leave the moving object at the stop,
The validity information associated with the identification information of the base station equipment installed at the stop is changed to the validity information indicating that the identification information is valid.
A first base station apparatus that transmits first peripheral base station information including valid identification information associated with validity information indicating that it is valid.
A base station device installed at a stop where a mobile body stops.
The identification information of the base station device installed in each of the moving objects to be arrived is associated with the validity information indicating its effectiveness and stored in the storage unit.
Obtain operation information from the operation management system that shows the current position of the moving object, future stop areas, and estimated time of arrival for each stop area.
Based on the above operation information, identify the moving object that will stop next at the stop where the own device is installed.
By the time a person can enter the moving object from the stop
The validity information associated with the identification information of the base station device installed in the mobile body is changed to the validity information indicating that the identification information is valid.
A second base station apparatus that transmits second peripheral base station information including valid identification information associated with validity information indicating that it is valid.
A communication system equipped with. It is a communication method of the base station device installed in the mobile body.
The identification information of the base station equipment installed in each of the stop areas scheduled to arrive and the validity information indicating its effectiveness are associated and stored in the storage unit.
The operation information indicating the current position of the moving body, the future stop place, and the estimated time of arrival for each stop place is acquired from the operation management system.
Based on the operation information, the stop place where the moving body will stop next is specified.
By the time a person can leave the moving object at the stop,
The validity information associated with the identification information of the base station equipment installed at the stop is changed to the validity information indicating that the identification information is valid.
A communication method for transmitting peripheral base station information including valid identification information associated with validity information indicating that it is valid. A computer that stores the identification information of the base station equipment installed in each of the stop areas scheduled to arrive in the storage unit in association with the validity information indicating its effectiveness, and is a base installed in a mobile body. To the computer of the station equipment,
A procedure for acquiring operation information indicating the current position of the moving body, a future stop, and the estimated time of arrival for each stop from the operation management system, and
The procedure for identifying the stop place where the moving body will stop next based on the operation information, and
By the time a person can leave the moving object at the stop,
The procedure for changing the validity information associated with the identification information of the base station device installed in the stop area to the validity information indicating that the identification information is valid, and
A procedure for transmitting peripheral base station information including valid identification information associated with validity information indicating that it is valid, and a procedure for transmitting the peripheral base station information.
A program to execute. It is a computer that stores the identification information of the base station device installed in each of the moving objects scheduled to arrive and the validity information indicating its effectiveness in the storage unit in association with each other, and is a stop place where the moving object stops. To the computer of the base station equipment installed in
The procedure for acquiring operation information from the operation management system, which indicates the current position of the moving object, the future stop area, and the estimated time of arrival for each stop area,
Based on the above operation information, the procedure for identifying the next moving object to stop at the stop where the own device is installed, and
By the time a person can enter the moving object from the stop
The procedure for changing the validity information associated with the identification information of the base station device installed in the mobile body to the validity information indicating that the identification information is valid, and
A procedure for transmitting peripheral base station information including valid identification information associated with validity information indicating that it is valid, and a procedure for transmitting the peripheral base station information.
A program to execute.

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