WO2021100095A1 - Route switching device, wireless communication system, control circuit, storage medium, and route switching method - Google Patents

Route switching device, wireless communication system, control circuit, storage medium, and route switching method Download PDF

Info

Publication number
WO2021100095A1
WO2021100095A1 PCT/JP2019/045121 JP2019045121W WO2021100095A1 WO 2021100095 A1 WO2021100095 A1 WO 2021100095A1 JP 2019045121 W JP2019045121 W JP 2019045121W WO 2021100095 A1 WO2021100095 A1 WO 2021100095A1
Authority
WO
WIPO (PCT)
Prior art keywords
wireless communication
communication system
route switching
unit
mobile
Prior art date
Application number
PCT/JP2019/045121
Other languages
French (fr)
Japanese (ja)
Inventor
木下　裕介
啓二郎 武
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2021557844A priority Critical patent/JP7076653B2/en
Priority to PCT/JP2019/045121 priority patent/WO2021100095A1/en
Publication of WO2021100095A1 publication Critical patent/WO2021100095A1/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
    • H04W36/324—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data by mobility data, e.g. speed data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H04W4/42—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for mass transport vehicles, e.g. buses, trains or aircraft

Definitions

  • some wireless communication systems for trains use LCX (Leaky Coaxial cable). Since the allocated wireless band of the LCX wireless communication system is narrow, a small-capacity application (hereinafter, referred to as an existing application) having a small required transmission capacity such as voice is realized. On the other hand, with regard to wireless communication systems, it is desired to support large-capacity applications (hereinafter referred to as new applications) such as image file transfer. Therefore, the introduction of a wireless communication system using millimeter waves that can secure a large band is being considered. Here, millimeter waves have high straightness but large distance attenuation. Therefore, in the millimeter-wave wireless communication system, the transmission output can be increased by giving directivity to the millimeter-wave beam, and the cell size can be secured by forming one cell with a plurality of antennas.
  • LCX Leaky Coaxial cable
  • a millimeter-wave wireless communication system having a speed higher than that of the LCX wireless communication system may be additionally introduced only in a part of the communication areas. Further, in the communication area where a high-speed millimeter-wave wireless communication system is additionally introduced, it is desirable to use the millimeter-wave wireless communication system for the communication of the existing application in order to reduce the data traffic load of the LCX wireless communication system. However, since millimeter-wave communication is possible only in a part of the communication area, each mobile unit determines whether or not it is in a communication area where millimeter-wave communication is possible, and uses the data of the existing application as millimeter-wave.
  • Patent Document 1 discloses a technique in which a communication terminal device selects a communication path according to communication quality based on observation results of wireless communication quality such as throughput and received power strength. ing.
  • the present invention has been made in view of the above, and an object of the present invention is to obtain a route switching device capable of switching a wireless communication method without interrupting communication.
  • the mobile communication system mounted on the mobile body moving on the specified route and the terrestrial communication system installed on the ground are the first.
  • a wireless communication system capable of wireless communication by the wireless communication system of No. 1 and the second wireless communication system having a larger transmission capacity than the first wireless communication system
  • a route provided by at least one of a mobile communication system and a terrestrial communication system. It is a switching device.
  • the mobile communication system and the terrestrial communication system are capable of wireless communication by the first wireless communication method in the first communication area which is the entire area of the route, and are capable of wireless communication in the second communication area which is a part of the route.
  • Wireless communication is possible by wireless communication method.
  • the route switching device can communicate with a first communication unit capable of communicating with a wireless communication device that performs wireless communication by the first wireless communication method and a wireless communication device that performs wireless communication by the second wireless communication method.
  • the route switching device has an effect that the wireless communication method can be switched without interruption of communication.
  • the figure which shows the configuration example of the wireless communication system which concerns on Embodiment 1. A block diagram showing a configuration example of a route switching device included in the terrestrial communication system according to the first embodiment. The figure which shows the example of the route switching profile according to the moving speed of a train stored in the storage part provided in the route switching part of the route switching device which concerns on Embodiment 1.
  • the figure which shows the structural example of the processing circuit when the processing circuit provided in the path switching apparatus which concerns on Embodiment 1 is realized by a processor and a memory.
  • a sequence diagram showing a route switching operation of a route switching device of a terrestrial communication system in the wireless communication system according to the third embodiment The figure which shows the configuration example of the wireless communication system which concerns on Embodiment 4.
  • the route switching device the wireless communication system, the control circuit, the storage medium, and the route switching method according to the embodiment of the present invention will be described in detail with reference to the drawings.
  • the present invention is not limited to this embodiment.
  • FIG. 1 is a diagram showing a configuration example of a wireless communication system 400 according to a first embodiment of the present invention.
  • the wireless communication system 400 includes a terrestrial communication system 120 and a mobile communication system 220.
  • the terrestrial communication system 120 is a system that is installed on the ground and performs wireless communication with the mobile communication system 220 mounted on the train 230.
  • the mobile communication system 220 is a system mounted on the train 230 and wirelessly communicates with the ground communication system 120 installed on the ground.
  • the train 230 is a moving body that travels on a defined route, the rail 300 in the example of FIG.
  • the traveling direction of the train 230 is the left direction in FIG. 1 as shown by the arrow in FIG.
  • the mobile communication system 220 and the terrestrial communication system 120 perform wireless communication by a wireless communication system using LCX and a wireless communication system using millimeter waves.
  • the millimeter-wave wireless communication system is a wireless communication system having a higher transmission speed and a larger transmission capacity than the LCX wireless communication system.
  • the LCX wireless communication system may be referred to as a first wireless communication system
  • the millimeter wave wireless communication system may be referred to as a second wireless communication system.
  • the wireless communication system 400 is used, for example, in a train operation management system in which the mobile body is a train 230 and manages the operation of the mobile train 230 on the ground, but the application of the wireless communication system 400 is not limited to this. ..
  • the mobile communication system 220 and the terrestrial communication system 120 are capable of wireless communication by the LCX wireless communication method in the first communication area, which is the entire path on which the mobile train 230 travels. Further, the mobile communication system 220 and the terrestrial communication system 120 can perform wireless communication by a millimeter-wave wireless communication method in a second communication area which is a part of a route on which the mobile train 230 moves.
  • the configuration of the terrestrial communication system 120 installed on the ground will be described.
  • the terrestrial communication system 120 includes an existing application server 100, a new application server 101, a route switching device 102, an LCX communication system 106, and a millimeter-wave communication system 111.
  • the existing application server 100 is a server that realizes an application such as voice that requires a small transmission capacity.
  • the existing application server 100 communicates with the existing application terminal 200 included in the mobile communication system 220, which will be described later.
  • the new application server 101 is a server that realizes an application having a large transmission capacity such as transfer of an image file.
  • the new application server 101 communicates with the new application terminal 201 included in the mobile communication system 220, which will be described later.
  • the route switching device 102 is connected to the existing application server 100, the new application server 101, the LCX communication system 106, and the millimeter wave communication system 111. Since the data handled by the new application server 101 is a large amount of data, the route switching device 102 transfers the data acquired from the new application server 101 to the millimeter-wave communication system 111. The route switching device 102 transfers the data acquired from the existing application server 100 to the LCX communication system 106 or the millimeter wave communication system 111. The method for determining whether the route switching device 102 transfers the data acquired from the existing application server 100 to the LCX communication system 106 or the millimeter wave communication system 111 will be described later.
  • the LCX communication system 106 is a wireless communication device provided in the mobile communication system 220 in the terrestrial communication system 120 that performs wireless communication using the LCX mobile station 203 and LCX, which will be described later.
  • the LCX communication system 106 includes an LCX control device 103, an LCX base station 104, and an LCX antenna 105.
  • the LCX control device 103 manages which LCX antenna 105 of which LCX base station 104 the train 230 is connected to.
  • the size of the LCX cell configured by the LCX antenna 105 is substantially the same as the size of the LCX antenna 105.
  • the area where the train 230 can move is entirely covered by the communication area of the LCX communication system 106, that is, the LCX cell configured by the LCX antenna 105.
  • the LCX cell corresponds to the above-mentioned first communication area.
  • FIG. 1 shows a case where the LCX communication system 106 includes one LCX base station 104 and one LCX antenna 105, but this is an example, and the present invention is not limited to this.
  • the LCX communication system 106 may include a plurality of combinations of the LCX base station 104 and the LCX antenna 105. That is, the communication area of the LCX communication system 106 may be formed by LCX cells composed of a plurality of LCX antennas 105.
  • the millimeter-wave communication system 111 is a wireless communication device provided in the mobile communication system 220 that performs wireless communication using millimeter waves with the millimeter-wave mobile station 205, which will be described later, in the terrestrial communication system 120.
  • the millimeter-wave communication system 111 includes a millimeter-wave control device 107, a millimeter-wave base station 108, and millimeter-wave antennas 109a to 109e.
  • the millimeter wave control device 107 manages which millimeter wave base station 108 the train 230 is connected to.
  • the millimeter-wave base station 108 manages which millimeter-wave antennas 109a to 109e the train 230 is connected to.
  • the millimeter-wave communication system 111 extends the communicable distance by giving directivity to the millimeter-wave antennas 109a to 109e, and constitutes one cell with a plurality of millimeter-wave antennas 109a to 109e to form a cell size. Is secured. Therefore, the millimeter-wave antennas 109a to 109e have directivity, and the millimeter-wave antennas 109a to 109e constitute one millimeter-wave cell 110.
  • the size of the millimeter wave cell 110 is assumed to be sufficiently smaller than the size of the LCX antenna 105, that is, the LCX cell.
  • the millimeter wave cell 110 corresponds to the above-mentioned second communication area.
  • the terrestrial communication system 120 has one millimeter-wave cell, but a plurality of millimeter-wave cells may exist. That is, the terrestrial communication system 120 may include a plurality of millimeter-wave communication systems 111.
  • the millimeter wave antennas 109a to 109e are not distinguished, they may be referred to as millimeter wave antennas 109.
  • the terrestrial communication system 120 communicates wirelessly with the mobile communication system 220 by a millimeter-wave wireless communication method via a plurality of millimeter-wave antennas 109a to 109e installed on the ground and provided with directivity. It is possible.
  • the mobile communication system 220 includes an existing application terminal 200, a new application terminal 201, a route switching device 202, an LCX mobile station 203, an LCX antenna 204, a millimeter wave mobile station 205, and a millimeter wave antenna 206.
  • the existing application terminal 200 is a wireless communication device that transmits / receives data of an application having a small required transmission capacity such as voice.
  • the existing application terminal 200 communicates with the existing application server 100 included in the terrestrial communication system 120.
  • the new application terminal 201 is a wireless communication device that transmits / receives data of an application having a large transmission capacity such as transfer of an image file.
  • the new application terminal 201 communicates with the new application server 101 included in the terrestrial communication system 120.
  • the route switching device 202 is connected to the existing application terminal 200, the new application terminal 201, the LCX mobile station 203, and the millimeter wave mobile station 205. Since the data handled by the new application terminal 201 is a large amount of data, the route switching device 202 transfers the data acquired from the new application terminal 201 to the millimeter wave mobile station 205. The route switching device 202 transfers the data acquired from the existing application terminal 200 to the LCX mobile station 203 or the millimeter wave mobile station 205. The method for determining whether the route switching device 202 transfers the data acquired from the existing application terminal 200 to the LCX mobile station 203 or the millimeter wave mobile station 205 will be described later.
  • the LCX mobile station 203 is a wireless communication device that performs wireless communication using the LCX communication system 106 of the terrestrial communication system 120 and the LCX in the mobile communication system 220.
  • the LCX mobile station 203 performs wireless communication using the LCX communication system 106 of the terrestrial communication system 120 and the LCX via the LCX antenna 204.
  • the LCX antenna 204 is an antenna having directivity in the direction of the LCX antenna 105.
  • the millimeter-wave mobile station 205 is a wireless communication device that performs wireless communication using millimeter waves with the millimeter-wave communication system 111 of the terrestrial communication system 120 in the mobile communication system 220.
  • the millimeter-wave mobile station 205 performs wireless communication using the millimeter-wave with the millimeter-wave communication system 111 of the terrestrial communication system 120 via the millimeter-wave antenna 206.
  • the millimeter wave antenna 206 is an antenna having directivity in the traveling direction of the train 230.
  • the millimeter wave antenna 206 may be an antenna having directivity in a direction opposite to the traveling direction of the train 230. In the train 230, for example, when the traveling direction is in the right direction in FIG.
  • the directivity of the millimeter wave antenna 206 is opposite to the traveling direction of the train 230. Even if the train 230 is provided with two millimeter-wave antennas, specifically, a millimeter-wave antenna 206 whose directivity is in the traveling direction and a millimeter-wave antenna (not shown) whose directivity is in the direction opposite to the traveling direction. Good.
  • FIG. 2 is a block diagram showing a configuration example of the route switching device 102 included in the terrestrial communication system 120 according to the first embodiment.
  • the route switching device 102 includes a wired network interface unit 500, a route switching unit 501, an LCX network interface unit 504, and a millimeter wave network interface unit 505.
  • the wired network interface unit 500 transmits / receives data to / from the existing application server 100 and the new application server 101.
  • the wired network interface unit 500 transfers the data received from the existing application server 100 and the new application server 101 to the route switching unit 501.
  • the route switching unit 501 outputs the data transferred from the wired network interface unit 500 and transmitted to the mobile communication system 220, which is the communication partner, to the LCX network interface unit 504 or the millimeter-wave network interface unit 505. To decide. That is, the route switching unit 501 determines the route for transferring data.
  • the route switching unit 501 includes a storage unit 502 and a timer 503.
  • the storage unit 502 stores the relationship between the moving speed of the train 230 and the route switching timer value according to the time when the train 230 passes through the millimeter wave cell 110 at the above-mentioned moving speed for a plurality of moving speeds. That is, the storage unit 502 stores the route switching profile according to the moving speed of the train 230.
  • the timer 503 counts the elapsed time since the train 230 started wireless communication in the millimeter wave cell 110 by the millimeter wave wireless communication method.
  • the route switching unit 501 changes the wireless communication system between the mobile communication system 220 and the terrestrial communication system 120 from the millimeter wave wireless communication system. Decide to switch to the LCX wireless communication system.
  • the route switching unit 501 outputs the data acquired from the wired network interface unit 500 to the LCX network interface unit 504 or the millimeter wave network interface unit 505 based on the determined route. Specifically, the route switching unit 501 outputs the data acquired from the wired network interface unit 500 to the LCX network interface unit 504 when transmitting the data to the LCX communication system 106 of the terrestrial communication system 120, and outputs the data to the LCX network interface unit 504 of the terrestrial communication system 120. When transmitting to the millimeter-wave communication system 111, it is output to the millimeter-wave network interface unit 505.
  • the LCX network interface unit 504 is a first communication unit capable of communicating with the LCX communication system 106, which is a wireless communication device that performs wireless communication by a wireless communication method using LCX.
  • the millimeter-wave network interface unit 505 is a second communication unit capable of communicating with the millimeter-wave communication system 111, which is a wireless communication device that performs wireless communication by a wireless communication method using millimeter waves.
  • the existing application server 100, the new application server 101, the LCX communication system 106, and the millimeter-wave communication system 111 shown in FIG. 2 are the existing application terminal 200, respectively. It replaces the new application terminal 201, LCX mobile station 203, and millimeter wave mobile station 205.
  • FIG. 3 is a diagram showing an example of a route switching profile according to the moving speed of the train 230 stored in the storage unit 502 included in the route switching unit 501 of the route switching device 102 according to the first embodiment.
  • the route switching profile shown in FIG. 3 shows that, for example, when the moving speed of the train 230 is 360 (km / h), the route switching timer value is 47 (s).
  • the route switching timer value of the route switching profile shown in FIG. 3 a value is set so that the train 230 does not go out of the communication area of the millimeter wave cell 110 even if the train 230 moves at the moving speed indicated by the route switching profile.
  • the route switching profile can be set by the operator operating the train 230, but is not limited to this.
  • the route switching unit 501 compares, for example, the actual moving speed of the train 230 with the moving speed of the route switching profile shown in FIG. 3 in order from the top, and the route switching timer corresponding to the moving speed of the corresponding route switching profile. Get the value.
  • the route switching profile shown in FIG. 3 is an example, and is not limited to this.
  • the movement speed may be set to four or more, and the description of the movement speed may be specified in a range such as "40 ⁇ movement speed ⁇ 120".
  • FIG. 4 is a sequence diagram showing a route switching operation of the route switching device 102 of the terrestrial communication system 120 and the route switching device 202 of the mobile communication system 220 in the wireless communication system 400 according to the first embodiment. Specifically, FIG. 4 describes a route switching operation when data is transmitted from the existing application server 100 of the terrestrial communication system 120 to the existing application terminal 200 of the mobile communication system 220.
  • the existing application server 100, the new application server 101, the route switching device 102, the LCX communication system 106, and the millimeter wave communication system 111 of the terrestrial communication system 120 have been started.
  • the train 230 is in the communication area of the LCX antenna 105, the power is turned on at a position in front of the millimeter wave cell 110, and then the train 230 heads for the communication area of the millimeter wave cell 110. ..
  • the train 230 When a driver or the like (not shown) turns on the power of the train 230, the train 230 has an existing application terminal 200 of the mobile communication system 220, a new application terminal 201, a route switching device 202, an LCX mobile station 203, an LCX antenna 204, and a millimeter wave.
  • the mobile station 205 and the millimeter-wave antenna 206 are activated.
  • the train 230 exists in the communication area of the LCX antenna 105. Therefore, the LCX mobile station 203 of the mobile communication system 220 registers with the LCX control device 103 that it is in the communication area of the LCX antenna 105 via the LCX base station 104 (step S101).
  • the LCX control device 103 notifies the route switching device 102 that the train 230 can communicate via the LCX communication system 106 by means of a route information notification (step S102).
  • the LCX network interface unit 504 receives the route information notification and transfers it to the route switching unit 501.
  • the route switching unit 501 holds the route information that the train 230 can communicate via the LCX communication system 106.
  • the LCX mobile station 203 notifies the route switching device 202 that the train 230 can communicate via the LCX communication system 106 by means of a route information notification (step S103).
  • the LCX network interface unit 504 receives the route information notification and transfers it to the route switching unit 501.
  • the route switching unit 501 holds the route information that the train 230 can communicate via the LCX communication system 106.
  • the existing application server 100 and the existing application terminal 200 have the route switching device 102, the LCX control device 103, the LCX base station 104, the LCX mobile station 203, and the route switching, as shown in FIG. Communication can be performed via the device 202 (step S104).
  • the millimeter wave mobile station 205 of the mobile communication system 220 sends the millimeter wave cell 110 to the millimeter wave control device 107 via the millimeter wave base station 108. Register that you are in the communication area (step S105). At this time, the millimeter wave mobile station 205 registers the moving speed of the train 230 in the millimeter wave control device 107. That is, the mobile communication system 220 notifies the ground communication system 120 of the moving speed of the train 230.
  • the millimeter-wave control device 107 notifies the route switching device 102 that the train 230 can communicate via the millimeter-wave communication system 111 and the moving speed of the train 230 by route information notification (step S106).
  • the millimeter-wave network interface unit 505 receives the route information notification and transfers it to the route switching unit 501.
  • the route switching unit 501 holds the route information that the train 230 can communicate via the millimeter-wave communication system 111 and the moving speed information of the train 230.
  • the millimeter-wave mobile station 205 notifies the route switching device 202 that the train 230 can communicate via the millimeter-wave communication system 111 and the moving speed of the train 230 by route information notification (step S107).
  • the millimeter-wave network interface unit 505 receives the route information notification and transfers it to the route switching unit 501.
  • the route switching unit 501 holds the route information that the train 230 can communicate via the millimeter-wave communication system 111 and the moving speed information of the train 230.
  • the existing application server 100 and the existing application terminal 200 have the route switching device 102, the millimeter wave control device 107, the millimeter wave base station 108, and the millimeter wave mobile station 205, as shown in FIG. And communication can be performed via the route switching device 202 (step S108).
  • the route switching unit 501 of the route switching device 102 that received the route information notification in step S106 uses the route switching profile stored in the storage unit 502 to determine the train 230 based on the moving speed of the train 230 included in the route information notification.
  • a route switching profile corresponding to the moving speed is selected (step S109). For example, when the moving speed of the train 230 is 300 (km / h), the route switching unit 501 has a moving speed (km / h) of the train 230 of "360 or less" and a route switching timer value (s) of "47". Select the route switching profile of. As a result, the route switching unit 501 sets the path switching timer value 47 (s) in the timer 503 and starts counting by the timer 503 (step S110).
  • the route switching unit 501 of the route switching device 202 that received the route information notification in step S107 is a train from the route switching profile stored in the storage unit 502 based on the moving speed of the train 230 included in the route information notification.
  • a route switching profile corresponding to the movement speed of 230 is selected (step S111). For example, when the moving speed of the train 230 is 300 (km / h), the route switching unit 501 has a moving speed (km / h) of the train 230 of "360 or less" and a route switching timer value (s) of "47". Select the route switching profile of. As a result, the route switching unit 501 sets the path switching timer value 47 (s) in the timer 503 and starts counting by the timer 503 (step S112).
  • the route switching unit 501 determines that the train 230 cannot communicate via the millimeter-wave communication system 111, and switches the route to communication via the LCX communication system 106 (step S113).
  • the route switching unit 501 determines that the train 230 cannot communicate via the millimeter-wave communication system 111, and switches the route to communication via the LCX communication system 106 (step S114).
  • the existing application server 100 and the existing application terminal 200 have the route switching device 102, the LCX control device 103, the LCX base station 104, the LCX mobile station 203, and the route switching, as shown in FIG. Communication can be performed via the device 202 (step S115).
  • the millimeter wave control device 107 of the millimeter wave communication system 111 notifies the route switching device 102 of the moving speed of the train 230 by the route information notification, but at the same time, the size of the millimeter wave cell 110. Information may be notified.
  • the route switching unit 501 of the route switching device 102 accurately calculates the route switching timer value, which is the time for the train 230 to pass through the millimeter wave cell 110, by using the moving speed and the size information of the millimeter wave cell 110. can do.
  • the LCX communication system 106 is assumed as a communication system that covers all the routes on which the train 230 travels, and the millimeter-wave communication system 111 is used as a high-speed communication system that covers a part of the routes on which the train 230 travels. It is assumed, but it is an example and is not limited to this.
  • the communication system that covers all the routes on which the train 230 travels may be a communication system other than the LCX communication system 106.
  • the high-speed communication system that covers a part of the route on which the train 230 moves may be a communication system other than the millimeter-wave communication system 111.
  • the wireless communication system 400 is a system in which both the mobile communication system 220 and the terrestrial communication system 120 are provided with a route switching device for switching a data transfer destination.
  • the route switching unit 501 is realized by a processing circuit.
  • the processing circuit may be a processor and memory for executing a program stored in the memory, or may be dedicated hardware.
  • the processing circuit is also called a control circuit.
  • FIG. 5 is a diagram showing a configuration example of a processing circuit 90 when the processing circuit included in the route switching devices 102 and 202 according to the first embodiment is realized by a processor and a memory.
  • the processing circuit 90 shown in FIG. 5 is a control circuit and includes a processor 91 and a memory 92.
  • each function of the processing circuit 90 is realized by software, firmware, or a combination of software and firmware.
  • the software or firmware is written as a program and stored in the memory 92.
  • each function is realized by the processor 91 reading and executing the program stored in the memory 92.
  • the processing circuit 90 includes a memory 92 for storing a program in which the processing of the route switching devices 102 and 202 is eventually executed. It can be said that this program is a program for causing the route switching devices 102 and 202 to execute each function realized by the processing circuit 90.
  • This program may be provided by a storage medium in which the program is stored, or may be provided by other means such as a communication medium.
  • the route switching unit 501 can communicate the data transmitted to the communication partner with the wireless communication device that performs wireless communication by the first wireless communication method, or the first communication unit or the second wireless communication method.
  • the processor 91 is, for example, a CPU (Central Processing Unit), a processing device, an arithmetic unit, a microprocessor, a microcomputer, a DSP (Digital Signal Processor), or the like.
  • the memory 92 is, for example, non-volatile or volatile such as RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable ROM), EEPROM (registered trademark) (Electrically EPROM). This includes semiconductor memories, magnetic disks, flexible disks, optical disks, compact disks, mini disks, DVDs (Digital Versatile Disc), and the like.
  • FIG. 6 is a diagram showing an example of a processing circuit 93 when the processing circuits included in the route switching devices 102 and 202 according to the first embodiment are configured by dedicated hardware.
  • the processing circuit 93 shown in FIG. 6 is, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a combination thereof. The thing is applicable.
  • the processing circuit a part may be realized by dedicated hardware and a part may be realized by software or firmware.
  • the processing circuit can realize each of the above-mentioned functions by the dedicated hardware, software, firmware, or a combination thereof.
  • the route switching device 102 of the terrestrial communication system 120 and the route switching device 202 of the mobile communication system 220 are wireless used for transmitting and receiving data.
  • the route switching profile according to the moving speed of the train 230 is selected, and the millimeter-wave wireless communication method is selected based on the route switching timer value described in the route switching profile.
  • the route switching devices 102 and 202 can switch the wireless communication method in the wireless communication system 400 before the train 230 leaves the millimeter wave cell 110, that is, without interruption of communication.
  • the route switching devices 102 and 202 can prevent data loss of the existing application.
  • Embodiment 2 the route switching device 202 of the mobile communication system 220 and the route switching device 102 of the terrestrial communication system 120 both determine the switching from the millimeter-wave wireless communication system to the LCX wireless communication system. ..
  • the second embodiment a case where only the route switching device of the mobile communication system determines the switching from the millimeter wave wireless communication system to the LCX wireless communication system will be described.
  • FIG. 7 is a diagram showing a configuration example of the wireless communication system 400a according to the second embodiment.
  • the wireless communication system 400a includes a terrestrial communication system 120 and a mobile communication system 220a.
  • the mobile communication system 220a is a system mounted on the train 230a and performing wireless communication with the ground communication system 120 installed on the ground.
  • the mobile communication system 220a replaces the route switching device 202 with the route switching device 202a, and further adds a camera 207 and an image analysis device 208 to the mobile communication system 220 of the first embodiment shown in FIG. Is.
  • the camera 207 is a photographing unit that photographs the traveling direction of the train 230a or the direction opposite to the traveling direction.
  • the camera 207 outputs the image information obtained by the photographing to the image analysis device 208.
  • the image analysis device 208 acquires image information from the camera 207.
  • the image analysis device 208 analyzes the image information acquired from the camera 207 and outputs the analysis result to the route switching device 202a.
  • FIG. 8 is a block diagram showing a configuration example of the route switching device 202a included in the mobile communication system 220a according to the second embodiment.
  • the route switching device 202a includes a wired network interface unit 500, a route switching unit 501a, an LCX network interface unit 504, and a millimeter wave network interface unit 505. Whether the route switching unit 501a outputs the data output from the wired network interface unit 500 to the terrestrial communication system 120, which is the communication partner, to the LCX network interface unit 504 or the millimeter-wave network interface unit 505. To determine.
  • the route switching unit 501a determines whether to output the data to be transmitted to the communication partner to the LCX network interface unit 504 or the millimeter wave network interface unit 505 based on the analysis result acquired from the image analysis device 208. For example, when the route switching unit 501a counts a specified number of millimeter-wave antennas 109 among a plurality of millimeter-wave antennas 109a to 109e installed on the ground, it is between the mobile communication system 220a and the terrestrial communication system 120. It is decided to switch the wireless communication system of the above from the millimeter wave wireless communication system to the LCX wireless communication system.
  • the route switching unit 501a assumes that the moving speed of the train 230a is low, and starts from the millimeter wave antenna 109e and is the fifth millimeter wave antenna.
  • the 109a is counted, it is decided to switch from the millimeter wave wireless communication system to the LCX wireless communication system. That is, when the train 230a reaches the cell end of the millimeter wave cell 110, which is the position of the millimeter wave antenna 109a, the route switching unit 501a determines to switch from the millimeter wave wireless communication system to the LCX wireless communication system.
  • the route switching unit 501a counts the fourth millimeter wave antenna 109b starting from the millimeter wave antenna 109e, assuming that the moving speed of the train 230a is high. At that time, it is decided to switch from the millimeter wave wireless communication system to the LCX wireless communication system. That is, the route switching unit 501a determines to switch from the millimeter wave wireless communication system to the LCX wireless communication system with a margin with respect to the cell end of the millimeter wave cell 110.
  • the route switching device 102 included in the terrestrial communication system 120 may have the same configuration as that of the first embodiment, and the route switching unit 501 of the route switching device 102 shown in FIG. 2 may be a storage unit 502 and a timer. 503 may be replaced with the deleted route switching unit.
  • FIG. 9 is a sequence diagram showing a route switching operation of the route switching device 202a of the mobile communication system 220a in the wireless communication system 400a according to the second embodiment. Specifically, FIG. 9 describes a route switching operation when data is transmitted from the existing application server 100 of the terrestrial communication system 120 to the existing application terminal 200 of the mobile communication system 220a. Since steps S201 to S208 are the same as steps S101 to S108 in the sequence diagram of the first embodiment shown in FIG. 4, the description thereof will be omitted.
  • the millimeter wave mobile station 205 transmits the route information notification in step S207
  • the millimeter wave mobile station 205 transmits an image analysis start notification to the image analysis device 208 (step S209).
  • the image analysis device 208 that has received the image analysis start notification starts the analysis of the image information acquired from the camera 207 (step S210).
  • the image analysis device 208 transmits the analysis result of analyzing the image information to the route switching device 202a (step S211).
  • the route switching unit 501a of the route switching device 202a determines to switch the wireless communication system between the mobile communication system 220a and the terrestrial communication system 120 from the millimeter wave wireless communication system to the LCX wireless communication system.
  • the route switching unit 501a of the route switching device 202a transmits a route information notification to the route switching device 102 using the millimeter-wave communication system 111 (step S213).
  • the route switching unit 501a of the route switching device 202a switches the route to communication via the LCX communication system 106 (step S214).
  • the route switching device 102 that received the route information notification in step S213 determines that the train 230a cannot communicate via the millimeter-wave communication system 111, and switches the route to communication via the LCX communication system 106 (step S215). ..
  • the existing application server 100 and the existing application terminal 200 have the route switching device 102, the LCX control device 103, the LCX base station 104, the LCX mobile station 203, and the route switching, as shown in FIG. Communication can be performed via the device 202a (step S216).
  • the image analysis device 208 starts the image analysis by receiving the image analysis start notification from the millimeter wave mobile station 205, but the present invention is not limited to this.
  • the image analysis device 208 may always perform image analysis without receiving the image analysis start notification from the millimeter wave mobile station 205.
  • the route switching unit 501a of the route switching device 202a transmits the route information notification to the route switching device 102 using the millimeter wave communication system 111, but the route information to the route switching device 102 using the LCX communication system 106. Notifications may be sent.
  • the image analysis device 208 may be provided with the route switching device 202a. Further, the route switching unit 501a may have the function of the image analysis device 208.
  • the wireless communication system 400a is a system in which the mobile communication system 220a includes a route switching device 202a for switching a data transfer destination.
  • the route switching device 202a of the mobile communication system 220a is a plurality of millimeter wave antennas based on the analysis result acquired from the image analysis device 208.
  • the specified number of antennas out of 109 are counted, it is decided to switch the wireless communication system from the millimeter wave wireless communication system to the LCX wireless communication system.
  • the wireless communication system 400a the same effect as in the first embodiment can be obtained.
  • Embodiment 3 In the first embodiment, the route switching device 202 of the mobile communication system 220 and the route switching device 102 of the terrestrial communication system 120 both determine the switching from the millimeter-wave wireless communication system to the LCX wireless communication system. .. In the third embodiment, a case where only the route switching device of the terrestrial communication system determines the switching from the millimeter-wave wireless communication system to the LCX wireless communication system will be described.
  • FIG. 10 is a diagram showing a configuration example of the wireless communication system 400b according to the third embodiment.
  • the wireless communication system 400b includes a terrestrial communication system 120b and a mobile communication system 220.
  • the terrestrial communication system 120b is a system installed on the ground and performing wireless communication with the mobile communication system 220 mounted on the train 230.
  • the terrestrial communication system 120b replaces the route switching device 102 and the millimeter wave communication system 111 with the route switching device 102b and the millimeter wave communication system 111b with respect to the terrestrial communication system 120 of the first embodiment shown in FIG. is there.
  • the millimeter-wave communication system 111b is obtained by adding a camera 112 and an image analysis device 113 to the millimeter-wave communication system 111 of the first embodiment shown in FIG.
  • the camera 112 is a photographing unit that photographs the route on which the train 230 moves and monitors the position of the train 230.
  • the camera 112 outputs the image information obtained by shooting to the image analysis device 113.
  • the image analysis device 113 acquires image information from the camera 112.
  • the image analysis device 113 analyzes the image information acquired from the camera 112, and outputs the analysis result to the route switching device 102b.
  • FIG. 11 is a block diagram showing a configuration example of the route switching device 102b included in the terrestrial communication system 120b according to the third embodiment.
  • the route switching device 102b includes a wired network interface unit 500, a route switching unit 501b, an LCX network interface unit 504, and a millimeter wave network interface unit 505.
  • the route switching unit 501b outputs the data output from the wired network interface unit 500 to the mobile communication system 220, which is the communication partner, to the LCX network interface unit 504 or the millimeter-wave network interface unit 505. To decide.
  • the route switching unit 501b determines whether to output the data to be transmitted to the communication partner to the LCX network interface unit 504 or the millimeter wave network interface unit 505 based on the analysis result acquired from the image analysis device 113.
  • the route switching unit 501b is a mobile communication system when the distance between the train 230 and the specified millimeter-wave antenna 109 among the plurality of millimeter-wave antennas 109a to 109e installed on the ground becomes a specified distance. It is decided to switch the wireless communication system between the 220 and the terrestrial communication system 120b from the millimeter wave wireless communication system to the LCX wireless communication system.
  • the route switching unit 501b assumes that the moving speed of the train 230 is low, and the cell end of the millimeter wave cell 110, that is, the train 230 is a millimeter wave.
  • the distance to the antenna 109a reaches the specified distance, it is decided to switch from the millimeter wave wireless communication system to the LCX wireless communication system. That is, when the train 230 reaches the position of the specified distance from the cell end of the millimeter wave cell 110, which is the position of the millimeter wave antenna 109a, the route switching unit 501b changes from the millimeter wave wireless communication method to the LCX wireless communication method. Decide to switch to.
  • the route switching unit 501b considers that the moving speed of the train 230 is high when the moving speed of the train 230 is equal to or higher than the specified moving speed threshold, and has a margin with respect to the cell end of the millimeter wave cell 110. Determines to switch from the millimeter-wave wireless communication system to the LCX wireless communication system when the distance from the millimeter-wave antenna 109b reaches a specified distance. That is, the route switching unit 501b determines to switch from the millimeter wave wireless communication system to the LCX wireless communication system with a margin with respect to the cell end of the millimeter wave cell 110.
  • the route switching device 202 included in the mobile communication system 220 may have the same configuration as that of the first embodiment, or the route switching unit 501 of the route switching device 102 shown in FIG. 2 having the same configuration. , The storage unit 502 and the timer 503 may be replaced with the deleted route switching unit.
  • FIG. 12 is a sequence diagram showing a route switching operation of the route switching device 102b of the terrestrial communication system 120b in the wireless communication system 400b according to the third embodiment. Specifically, FIG. 12 describes a route switching operation when data is transmitted from the existing application server 100 of the terrestrial communication system 120b to the existing application terminal 200 of the mobile communication system 220. Since steps S301 to S308 are the same as steps S101 to S108 in the sequence diagram of the first embodiment shown in FIG. 4, the description thereof will be omitted.
  • the millimeter wave control device 107 transmits the route information notification in step S306, the millimeter wave control device 107 transmits an image analysis start notification to the image analysis device 113 (step S309).
  • the image analysis device 113 that has received the image analysis start notification starts the analysis of the image information acquired from the camera 112 (step S310).
  • the image analysis device 113 transmits the analysis result of analyzing the image information to the route switching device 102b (step S311).
  • the route switching unit 501b of the route switching device 102b has a distance to the specified millimeter wave antenna 109 among the plurality of millimeter wave antennas 109a to 109e on which the train 230 is installed on the ground.
  • the position is reached (step S312), it is determined that the train 230 cannot communicate via the millimeter-wave communication system 111b.
  • the route switching unit 501b of the route switching device 102b determines to switch the wireless communication system between the mobile communication system 220 and the terrestrial communication system 120b from the millimeter wave wireless communication system to the LCX wireless communication system.
  • the route switching unit 501b of the route switching device 102b transmits a route information notification to the route switching device 202 using the millimeter-wave communication system 111b (step S313).
  • the route switching unit 501b of the route switching device 102b switches the route to communication via the LCX communication system 106 (step S314).
  • the route switching device 202 that received the route information notification in step S313 determines that the train 230 cannot communicate via the millimeter-wave communication system 111b, and switches the route to communication via the LCX communication system 106 (step S315). ..
  • the existing application server 100 and the existing application terminal 200 have the route switching device 102b, the LCX control device 103, the LCX base station 104, the LCX mobile station 203, and the route switching, as shown in FIG. Communication can be performed via the device 202 (step S316).
  • the image analysis device 113 starts the image analysis by receiving the image analysis start notification from the millimeter wave control device 107, but the present invention is not limited to this.
  • the image analysis device 113 may always perform image analysis without receiving the image analysis start notification from the millimeter wave control device 107.
  • the route switching unit 501b of the route switching device 102b transmitted the route information notification to the route switching device 202 using the millimeter wave communication system 111b, but the route information to the route switching device 202 using the LCX communication system 106. Notifications may be sent.
  • the wireless communication system 400b is a system in which the terrestrial communication system 120b includes a route switching device 102b for switching the data transfer destination.
  • the route switching device 102b of the ground communication system 120b is the train 230 and a plurality of millimeters based on the analysis result acquired from the image analysis device 113.
  • the distance from the millimeter wave antenna 109 at the specified position of the wave antenna 109 reaches the specified distance, it is decided to switch the wireless communication method from the millimeter wave wireless communication system to the LCX wireless communication system. ..
  • the wireless communication system 400b the same effect as in the first embodiment can be obtained.
  • Embodiment 4 In the first embodiment, the route switching device 202 of the mobile communication system 220 and the route switching device 102 of the terrestrial communication system 120 both determine the switching from the millimeter-wave wireless communication system to the LCX wireless communication system. ..
  • the fourth embodiment describes a case different from the second embodiment in which only the route switching device of the mobile communication system determines the switching from the millimeter-wave wireless communication system to the LCX wireless communication system.
  • FIG. 13 is a diagram showing a configuration example of the wireless communication system 400c according to the fourth embodiment.
  • the wireless communication system 400c includes a terrestrial communication system 120 and a mobile communication system 220c.
  • the mobile communication system 220c is a system mounted on the train 230c and wirelessly communicates with the ground communication system 120 installed on the ground.
  • the mobile communication system 220c is obtained by replacing the route switching device 202 with the route switching device 202c and further adding the received power analysis device 209 to the mobile communication system 220 of the first embodiment shown in FIG. ..
  • the received power analysis device 209 analyzes the received power information indicating the received power when the data transmitted from the terrestrial communication system 120 is received by the millimeter wave mobile station 205 via the millimeter wave antenna 206.
  • the received power analysis device 209 outputs the analysis result to the route switching device 202c. It is assumed that the millimeter wave mobile station 205 transmits the received power information to the received power analysis device 209.
  • FIG. 14 is a diagram showing an example of the analysis result of the received power information by the received power analysis device 209 included in the mobile communication system 220c according to the fourth embodiment.
  • the horizontal axis represents time and the vertical axis represents received power.
  • FIG. 14 is a time-series graph of the received power information when the millimeter-wave mobile station 205 receives data from the time when the train 230c is on the millimeter-wave cell 110 to the time when it is not on the line. ..
  • the peaks A to E shown in FIG. 14 are the received powers when the train 230c receives data in the vicinity of the millimeter wave antennas 109a to 109e, respectively. As shown in FIG.
  • the terrestrial communication system 120 includes five millimeter-wave antennas 109a to 109e. Further, as shown in FIG. 13, the directivity of the millimeter wave antennas 109a to 109e is opposite to the traveling direction of the train 230c, and in the example of FIG. 13, it is in the right direction.
  • the received power in the millimeter wave mobile station 205 is equal to or higher than a certain value as shown in FIG. Then, as the train 230c approaches the millimeter-wave antenna 109e, the received power of the millimeter-wave mobile station 205 increases. Immediately after the train 230c advances in the traveling direction and the train 230c passes through the communication area of the millimeter wave antenna 109e, the received power of the millimeter wave mobile station 205 drops sharply as shown by the peak E.
  • the millimeter wave mobile station 205 maintains the received power above a certain value, and as the train 230c advances in the traveling direction and approaches the millimeter wave antenna 109d, the millimeter wave antenna 109d is approached.
  • the received power of the wave mobile station 205 becomes large. In this way, as the train 230c approaches the millimeter wave antenna 109, the received power of the millimeter wave mobile station 205 increases, and immediately after the train 230c passes through the millimeter wave antenna 109, the received power of the millimeter wave mobile station 205 drops sharply.
  • the event to be performed is defined as the received power fluctuation.
  • FIG. 15 is a block diagram showing a configuration example of the route switching device 202c included in the mobile communication system 220c according to the fourth embodiment.
  • the route switching device 202c includes a wired network interface unit 500, a route switching unit 501c, an LCX network interface unit 504, and a millimeter wave network interface unit 505. Whether the route switching unit 501c outputs the data output from the wired network interface unit 500 to the terrestrial communication system 120, which is the communication partner, to the LCX network interface unit 504 or the millimeter-wave network interface unit 505. To determine.
  • the route switching unit 501c determines whether to output the data to be transmitted to the communication partner to the LCX network interface unit 504 or the millimeter wave network interface unit 505 based on the analysis result acquired from the received power analysis device 209. For example, when the train 230c passes through the specified number of millimeter-wave antennas 109 among the plurality of millimeter-wave antennas 109a to 109e installed on the ground, the route switching unit 501c has the mobile communication system 220c and the ground communication system 120. It is decided to switch the wireless communication system between the two and the millimeter wave wireless communication system to the LCX wireless communication system. As shown in FIG. 14, the analysis result obtained from the received power analysis device 209 fluctuates greatly when the train 230c passes through the millimeter wave antenna 109. Therefore, the route switching section 501c can estimate the position of the train 230c by counting the number of received power fluctuations.
  • the route switching unit 501c considers that the moving speed of the train 230c is low when the moving speed of the train 230c is less than the specified moving speed threshold, and starts from the millimeter wave antenna 109e and is the fifth millimeter wave antenna. When passing through 109a, it is decided to switch from the millimeter wave wireless communication system to the LCX wireless communication system. That is, the route switching section 501c determines that when the train 230c reaches the cell end of the millimeter wave cell 110, which is the position of the millimeter wave antenna 109a, the millimeter wave wireless communication system is switched to the LCX wireless communication system.
  • the route switching unit 501c assumes that the moving speed of the train 230c is high, starts from the millimeter wave antenna 109e, and passes through the fourth millimeter wave antenna 109b. At that time, it is decided to switch from the millimeter wave wireless communication system to the LCX wireless communication system. That is, the path switching section 501c determines to switch from the millimeter-wave wireless communication system to the LCX wireless communication system with a margin with respect to the cell end of the millimeter-wave cell 110.
  • the route switching device 102 included in the terrestrial communication system 120 may have the same configuration as that of the first embodiment, and the route switching unit 501 of the route switching device 102 shown in FIG. 2 may be a storage unit 502 and a timer. 503 may be replaced with the deleted route switching unit.
  • FIG. 16 is a sequence diagram showing a route switching operation of the route switching device 202c of the mobile communication system 220c in the wireless communication system 400c according to the fourth embodiment.
  • FIG. 16 specifically describes a route switching operation when data is transmitted from the existing application server 100 of the terrestrial communication system 120 to the existing application terminal 200 of the mobile communication system 220c. Since steps S401 to S408 are the same as steps S101 to S108 in the sequence diagram of the first embodiment shown in FIG. 4, the description thereof will be omitted.
  • the millimeter wave mobile station 205 transmits the route information notification in step S407
  • the millimeter wave mobile station 205 transmits the received power analysis start notification to the received power analysis device 209 (step S409).
  • the reception power analysis device 209 starts analysis of the reception power information acquired from the millimeter wave mobile station 205 (step S410).
  • the received power analysis device 209 transmits the analysis result of analyzing the received power information to the route switching device 202c (step S411).
  • the route switching unit 501c of the route switching device 202c communicates with the train 230c via the millimeter-wave communication system 111. Judge that it will be impossible.
  • the route switching unit 501c of the route switching device 202c determines to switch the wireless communication system between the mobile communication system 220c and the terrestrial communication system 120 from the millimeter wave wireless communication system to the LCX wireless communication system.
  • the route switching unit 501c of the route switching device 202c transmits a route information notification to the route switching device 102 using the millimeter-wave communication system 111 (step S413).
  • the route switching unit 501c of the route switching device 202c switches the route to communication via the LCX communication system 106 (step S414).
  • the route switching device 102 that received the route information notification in step S413 determines that the train 230c cannot communicate via the millimeter-wave communication system 111, and switches the route to communication via the LCX communication system 106 (step S415). ..
  • the existing application server 100 and the existing application terminal 200 have the route switching device 102, the LCX control device 103, the LCX base station 104, the LCX mobile station 203, and the route switching, as shown in FIG. Communication can be performed via the device 202c (step S416).
  • the received power analysis device 209 starts the received power analysis by receiving the received power analysis start notification from the millimeter wave mobile station 205, but the present invention is not limited to this.
  • the received power analysis device 209 may always perform the received power analysis even if the received power analysis start notification is not received from the millimeter wave mobile station 205.
  • the millimeter wave mobile station 205 and the received power analysis device 209 are separated, but the millimeter wave mobile station 205 may have the function of the received power analysis device 209.
  • the route switching unit 501c of the route switching device 202c used the millimeter-wave communication system 111 to transmit the route information notification to the route switching device 102, but the LCX communication system 106 was used to send the route information to the route switching device 102. Notifications may be sent.
  • the received power analysis device 209 may be provided by the route switching device 202c. Further, the route switching unit 501c may have the function of the received power analysis device 209.
  • the wireless communication system 400c is a system in which the mobile communication system 220c includes a route switching device 202c for switching the data transfer destination.
  • the route switching device 202c of the mobile communication system 220c has a plurality of trains 230c based on the analysis result acquired from the received power analysis device 209.
  • a specified number of millimeter-wave antennas 109 are passed through the millimeter-wave antennas 109, it is determined to switch the wireless communication method from the millimeter-wave wireless communication method to the LCX wireless communication method.
  • the wireless communication system 400c the same effect as in the first embodiment can be obtained.
  • the configuration shown in the above-described embodiment shows an example of the content of the present invention, can be combined with another known technique, and is one of the configurations without departing from the gist of the present invention. It is also possible to omit or change the part.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Train Traffic Observation, Control, And Security (AREA)

Abstract

Provided is a route switching device provided in a wireless communication system (400) in which a moving body communication system (220) mounted in a moving body moving along a specified route and a ground communication system (120) installed on the ground can wirelessly communicate with each other by a first wireless communication system and a second wireless communication system having larger transmission capacity than that of the first wireless communication system, the route switching device being provided in at least one of the moving body communication system (220) and the ground communication system (120). The route switching system comprises: an LCX network interface unit (504) that is a first communication unit capable of communicating with a wireless communication device that performs wireless communication by the first wireless communication system; a millimeter wave network interface unit (505) that is a second communication unit capable of communicating with a wireless communication device that performs wireless communication by the second wireless communication system; and a route switching unit (501) that determines whether or not to output data to be transmitted to a communications partner to the first communication unit or the second communication unit and outputs the data.

Description

経路切替装置、無線通信システム、制御回路、記憶媒体および経路切替方法Route switching device, wireless communication system, control circuit, storage medium and route switching method
　本発明は、無線通信方式を切り替える経路切替装置、無線通信システム、制御回路、記憶媒体および経路切替方法に関する。 The present invention relates to a route switching device for switching a wireless communication method, a wireless communication system, a control circuit, a storage medium, and a route switching method.
　従来、列車向けの無線通信システムには、ＬＣＸ（Leaky　Coaxial　cable）を用いるものがある。ＬＣＸの無線通信システムは、割り当てられている無線帯域が狭いため、音声など、要求される伝送容量の少ない小容量アプリ（以下、既存アプリと称する。）が実現されている。一方で、無線通信システムについては、画像ファイルの転送など大容量アプリ（以下、新規アプリと称する。）への対応が望まれている。そのため、大きな帯域を確保することが可能なミリ波を用いる無線通信システムの導入が検討されている。ここで、ミリ波は、直進性は高いものの距離減衰が大きい。そのため、ミリ波の無線通信システムは、ミリ波ビームに指向性を持たせることで送信出力を上げ、複数のアンテナで１つのセルを構成することでセルサイズを確保することができる。 Conventionally, some wireless communication systems for trains use LCX (Leaky Coaxial cable). Since the allocated wireless band of the LCX wireless communication system is narrow, a small-capacity application (hereinafter, referred to as an existing application) having a small required transmission capacity such as voice is realized. On the other hand, with regard to wireless communication systems, it is desired to support large-capacity applications (hereinafter referred to as new applications) such as image file transfer. Therefore, the introduction of a wireless communication system using millimeter waves that can secure a large band is being considered. Here, millimeter waves have high straightness but large distance attenuation. Therefore, in the millimeter-wave wireless communication system, the transmission output can be increased by giving directivity to the millimeter-wave beam, and the cell size can be secured by forming one cell with a plurality of antennas.
　ＬＣＸの無線通信システムを全てミリ波の無線通信システムに置き換えるには、大きなコストが必要となる。そのため、一部の通信エリアにのみ、ＬＣＸの無線通信システムよりも高速なミリ波の無線通信システムを追加導入することがある。また、高速なミリ波の無線通信システムを追加導入した通信エリアでは、ＬＣＸの無線通信システムのデータトラヒック負荷を下げるため、既存アプリの通信についてもミリ波の無線通信システムを用いることが望ましい。しかしながら、一部の通信エリアのみでミリ波の通信が可能なため、各移動体は、ミリ波の通信が可能な通信エリアに在線しているかどうかを判断し、既存アプリのデータをミリ波の無線通信システムに送るか、またはＬＣＸの無線通信システムに送るかを判断しなければならない。このような問題に対して、特許文献１には、通信端末装置が、スループット、受信電力強度などの無線通信品質の観測結果に基づいて、通信品質に応じた通信経路を選択する技術が開示されている。 A large cost is required to replace all LCX wireless communication systems with millimeter-wave wireless communication systems. Therefore, a millimeter-wave wireless communication system having a speed higher than that of the LCX wireless communication system may be additionally introduced only in a part of the communication areas. Further, in the communication area where a high-speed millimeter-wave wireless communication system is additionally introduced, it is desirable to use the millimeter-wave wireless communication system for the communication of the existing application in order to reduce the data traffic load of the LCX wireless communication system. However, since millimeter-wave communication is possible only in a part of the communication area, each mobile unit determines whether or not it is in a communication area where millimeter-wave communication is possible, and uses the data of the existing application as millimeter-wave. You must decide whether to send to the wireless communication system or to the LCX wireless communication system. In response to such a problem, Patent Document 1 discloses a technique in which a communication terminal device selects a communication path according to communication quality based on observation results of wireless communication quality such as throughput and received power strength. ing.
特許第４９９８４５９号公報Japanese Patent No. 4998459
　しかしながら、ミリ波の無線通信システムは、複数のアンテナで１つのセルを構成しているため、セル端においてスループット、受信電力強度などが低いとは限らない。そのため、特許文献１に記載の技術をミリ波の無線通信システムに適用した場合、移動体は、無線通信品質が悪くなったときにはセルから離れてしまい、通信が途絶えてしまう、という問題があった。 However, in a millimeter-wave wireless communication system, since one cell is composed of a plurality of antennas, the throughput, received power intensity, etc. are not always low at the cell end. Therefore, when the technique described in Patent Document 1 is applied to a millimeter-wave wireless communication system, there is a problem that the mobile body separates from the cell when the wireless communication quality deteriorates and communication is interrupted. ..
　本発明は、上記に鑑みてなされたものであって、通信が途絶えることなく無線通信方式を切り替え可能な経路切替装置を得ることを目的とする。 The present invention has been made in view of the above, and an object of the present invention is to obtain a route switching device capable of switching a wireless communication method without interrupting communication.
　上述した課題を解決し、目的を達成するために、本発明は、規定された経路を移動する移動体に搭載される移動体通信システムと、地上に設置される地上通信システムとが、第１の無線通信方式、および第１の無線通信方式よりも伝送容量の大きい第２の無線通信方式で無線通信が可能な無線通信システムにおいて、移動体通信システムおよび地上通信システムのうち少なくとも一方が備える経路切替装置である。移動体通信システムおよび地上通信システムは、経路の全域である第１の通信エリアにおいて第１の無線通信方式で無線通信が可能であり、経路の一部である第２の通信エリアにおいて第２の無線通信方式で無線通信が可能である。経路切替装置は、第１の無線通信方式で無線通信を行う無線通信装置と通信が可能な第１の通信部と、第２の無線通信方式で無線通信を行う無線通信装置と通信が可能な第２の通信部と、通信相手に送信するデータを第１の通信部または第２の通信部に出力するかを決定し、データを第１の通信部または第２の通信部に出力する経路切替部と、を備えることを特徴とする。 In order to solve the above-mentioned problems and achieve the object, in the present invention, the mobile communication system mounted on the mobile body moving on the specified route and the terrestrial communication system installed on the ground are the first. In a wireless communication system capable of wireless communication by the wireless communication system of No. 1 and the second wireless communication system having a larger transmission capacity than the first wireless communication system, a route provided by at least one of a mobile communication system and a terrestrial communication system. It is a switching device. The mobile communication system and the terrestrial communication system are capable of wireless communication by the first wireless communication method in the first communication area which is the entire area of the route, and are capable of wireless communication in the second communication area which is a part of the route. Wireless communication is possible by wireless communication method. The route switching device can communicate with a first communication unit capable of communicating with a wireless communication device that performs wireless communication by the first wireless communication method and a wireless communication device that performs wireless communication by the second wireless communication method. A path for determining whether to output the data to be transmitted to the second communication unit and the communication partner to the first communication unit or the second communication unit, and to output the data to the first communication unit or the second communication unit. It is characterized by including a switching unit.
　本発明にかかる経路切替装置は、通信が途絶えることなく無線通信方式を切り替えできる、という効果を奏する。 The route switching device according to the present invention has an effect that the wireless communication method can be switched without interruption of communication.
実施の形態１に係る無線通信システムの構成例を示す図The figure which shows the configuration example of the wireless communication system which concerns on Embodiment 1. 実施の形態１に係る地上通信システムが備える経路切替装置の構成例を示すブロック図A block diagram showing a configuration example of a route switching device included in the terrestrial communication system according to the first embodiment. 実施の形態１に係る経路切替装置の経路切替部が備える記憶部に記憶されている列車の移動速度に応じた経路切替プロファイルの例を示す図The figure which shows the example of the route switching profile according to the moving speed of a train stored in the storage part provided in the route switching part of the route switching device which concerns on Embodiment 1. 実施の形態１に係る無線通信システムにおける地上通信システムの経路切替装置および移動体通信システムの経路切替装置の経路切替動作を示すシーケンス図A sequence diagram showing a route switching operation of a route switching device of a terrestrial communication system and a route switching device of a mobile communication system in the wireless communication system according to the first embodiment. 実施の形態１に係る経路切替装置が備える処理回路をプロセッサおよびメモリで実現する場合の処理回路の構成例を示す図The figure which shows the structural example of the processing circuit when the processing circuit provided in the path switching apparatus which concerns on Embodiment 1 is realized by a processor and a memory. 実施の形態１に係る経路切替装置が備える処理回路を専用のハードウェアで構成する場合の処理回路の例を示す図The figure which shows the example of the processing circuit in the case where the processing circuit provided in the path switching device which concerns on Embodiment 1 is configured by exclusive hardware. 実施の形態２に係る無線通信システムの構成例を示す図The figure which shows the configuration example of the wireless communication system which concerns on Embodiment 2. 実施の形態２に係る移動体通信システムが備える経路切替装置の構成例を示すブロック図A block diagram showing a configuration example of a route switching device included in the mobile communication system according to the second embodiment. 実施の形態２に係る無線通信システムにおける移動体通信システムの経路切替装置の経路切替動作を示すシーケンス図A sequence diagram showing a route switching operation of a route switching device of a mobile communication system in the wireless communication system according to the second embodiment. 実施の形態３に係る無線通信システムの構成例を示す図The figure which shows the configuration example of the wireless communication system which concerns on Embodiment 3. 実施の形態３に係る地上通信システムが備える経路切替装置の構成例を示すブロック図A block diagram showing a configuration example of a route switching device included in the terrestrial communication system according to the third embodiment. 実施の形態３に係る無線通信システムにおける地上通信システムの経路切替装置の経路切替動作を示すシーケンス図A sequence diagram showing a route switching operation of a route switching device of a terrestrial communication system in the wireless communication system according to the third embodiment. 実施の形態４に係る無線通信システムの構成例を示す図The figure which shows the configuration example of the wireless communication system which concerns on Embodiment 4. 実施の形態４に係る移動体通信システムが備える受信電力解析装置による受信電力情報の解析結果の例を示す図The figure which shows the example of the analysis result of the received power information by the received power analysis apparatus provided in the mobile communication system which concerns on Embodiment 4. 実施の形態４に係る移動体通信システムが備える経路切替装置の構成例を示すブロック図A block diagram showing a configuration example of a route switching device included in the mobile communication system according to the fourth embodiment. 実施の形態４に係る無線通信システムにおける移動体通信システムの経路切替装置の経路切替動作を示すシーケンス図A sequence diagram showing a route switching operation of a route switching device of a mobile communication system in the wireless communication system according to the fourth embodiment.
　以下に、本発明の実施の形態に係る経路切替装置、無線通信システム、制御回路、記憶媒体および経路切替方法を図面に基づいて詳細に説明する。なお、この実施の形態によりこの発明が限定されるものではない。 Hereinafter, the route switching device, the wireless communication system, the control circuit, the storage medium, and the route switching method according to the embodiment of the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment.
実施の形態１．
　図１は、本発明の実施の形態１に係る無線通信システム４００の構成例を示す図である。無線通信システム４００は、地上通信システム１２０と、移動体通信システム２２０と、を備える。地上通信システム１２０は、地上に設置され、列車２３０に搭載される移動体通信システム２２０と無線通信を行うシステムである。移動体通信システム２２０は、列車２３０に搭載され、地上に設置される地上通信システム１２０と無線通信を行うシステムである。列車２３０は、規定された経路、図１の例ではレール３００を移動する移動体である。列車２３０の進行方向は、図１の矢印が示すように図１の左方向とする。無線通信システム４００において、移動体通信システム２２０および地上通信システム１２０は、ＬＣＸを用いる無線通信方式、およびミリ波を用いる無線通信方式によって無線通信を行う。ミリ波の無線通信方式は、ＬＣＸの無線通信方式よりも伝送速度が速く、伝送容量の大きい無線通信方式である。以降の説明において、ＬＣＸの無線通信方式を第１の無線通信方式と称し、ミリ波の無線通信方式を第２の無線通信方式と称することがある。 Embodiment 1.
FIG. 1 is a diagram showing a configuration example of a wireless communication system 400 according to a first embodiment of the present invention. The wireless communication system 400 includes a terrestrial communication system 120 and a mobile communication system 220. The terrestrial communication system 120 is a system that is installed on the ground and performs wireless communication with the mobile communication system 220 mounted on the train 230. The mobile communication system 220 is a system mounted on the train 230 and wirelessly communicates with the ground communication system 120 installed on the ground. The train 230 is a moving body that travels on a defined route, the rail 300 in the example of FIG. The traveling direction of the train 230 is the left direction in FIG. 1 as shown by the arrow in FIG. In the wireless communication system 400, the mobile communication system 220 and the terrestrial communication system 120 perform wireless communication by a wireless communication system using LCX and a wireless communication system using millimeter waves. The millimeter-wave wireless communication system is a wireless communication system having a higher transmission speed and a larger transmission capacity than the LCX wireless communication system. In the following description, the LCX wireless communication system may be referred to as a first wireless communication system, and the millimeter wave wireless communication system may be referred to as a second wireless communication system.
　無線通信システム４００は、例えば、移動体が列車２３０であり、移動体である列車２３０の運行を地上で管理する列車運行管理システムに使用されるが、無線通信システム４００の用途はこれに限定されない。移動体通信システム２２０および地上通信システム１２０は、移動体である列車２３０が移動する経路の全域である第１の通信エリアにおいて、ＬＣＸの無線通信方式で無線通信が可能である。また、移動体通信システム２２０および地上通信システム１２０は、移動体である列車２３０が移動する経路の一部である第２の通信エリアにおいて、ミリ波の無線通信方式で無線通信が可能である。 The wireless communication system 400 is used, for example, in a train operation management system in which the mobile body is a train 230 and manages the operation of the mobile train 230 on the ground, but the application of the wireless communication system 400 is not limited to this. .. The mobile communication system 220 and the terrestrial communication system 120 are capable of wireless communication by the LCX wireless communication method in the first communication area, which is the entire path on which the mobile train 230 travels. Further, the mobile communication system 220 and the terrestrial communication system 120 can perform wireless communication by a millimeter-wave wireless communication method in a second communication area which is a part of a route on which the mobile train 230 moves.
　地上に設置される地上通信システム１２０の構成について説明する。地上通信システム１２０は、既存アプリサーバ１００と、新規アプリサーバ１０１と、経路切替装置１０２と、ＬＣＸ通信システム１０６と、ミリ波通信システム１１１と、を備える。既存アプリサーバ１００は、音声など、要求される伝送容量の少ないアプリケーションを実現するサーバである。既存アプリサーバ１００は、移動体通信システム２２０が備える、後述する既存アプリ端末２００と通信を行う。新規アプリサーバ１０１は、画像ファイルの転送など伝送容量の大きいアプリケーションを実現するサーバである。新規アプリサーバ１０１は、移動体通信システム２２０が備える、後述する新規アプリ端末２０１と通信を行う。 The configuration of the terrestrial communication system 120 installed on the ground will be described. The terrestrial communication system 120 includes an existing application server 100, a new application server 101, a route switching device 102, an LCX communication system 106, and a millimeter-wave communication system 111. The existing application server 100 is a server that realizes an application such as voice that requires a small transmission capacity. The existing application server 100 communicates with the existing application terminal 200 included in the mobile communication system 220, which will be described later. The new application server 101 is a server that realizes an application having a large transmission capacity such as transfer of an image file. The new application server 101 communicates with the new application terminal 201 included in the mobile communication system 220, which will be described later.
　経路切替装置１０２は、既存アプリサーバ１００、新規アプリサーバ１０１、ＬＣＸ通信システム１０６、およびミリ波通信システム１１１と接続している。経路切替装置１０２は、新規アプリサーバ１０１で扱われるデータは大容量データのため、新規アプリサーバ１０１から取得したデータをミリ波通信システム１１１へ転送する。経路切替装置１０２は、既存アプリサーバ１００から取得したデータをＬＣＸ通信システム１０６またはミリ波通信システム１１１へ転送する。経路切替装置１０２が既存アプリサーバ１００から取得したデータをＬＣＸ通信システム１０６またはミリ波通信システム１１１のどちらへ転送するのかを決定する方法については後述する。 The route switching device 102 is connected to the existing application server 100, the new application server 101, the LCX communication system 106, and the millimeter wave communication system 111. Since the data handled by the new application server 101 is a large amount of data, the route switching device 102 transfers the data acquired from the new application server 101 to the millimeter-wave communication system 111. The route switching device 102 transfers the data acquired from the existing application server 100 to the LCX communication system 106 or the millimeter wave communication system 111. The method for determining whether the route switching device 102 transfers the data acquired from the existing application server 100 to the LCX communication system 106 or the millimeter wave communication system 111 will be described later.
　ＬＣＸ通信システム１０６は、地上通信システム１２０において、移動体通信システム２２０が備える、後述するＬＣＸ移動局２０３とＬＣＸを用いる無線通信を行う無線通信装置である。ＬＣＸ通信システム１０６は、ＬＣＸ制御装置１０３と、ＬＣＸ基地局１０４と、ＬＣＸアンテナ１０５と、を備える。ＬＣＸ制御装置１０３は、列車２３０がどのＬＣＸ基地局１０４のどのＬＣＸアンテナ１０５と接続しているかを管理する。ＬＣＸアンテナ１０５が構成するＬＣＸセルの大きさは、ＬＣＸアンテナ１０５の大きさとほぼ同じである。列車２３０が移動可能なエリアは、ＬＣＸ通信システム１０６の通信エリア、すなわちＬＣＸアンテナ１０５が構成するＬＣＸセルによって全てカバーされているものとする。ＬＣＸセルが、前述の第１の通信エリアに相当する。 The LCX communication system 106 is a wireless communication device provided in the mobile communication system 220 in the terrestrial communication system 120 that performs wireless communication using the LCX mobile station 203 and LCX, which will be described later. The LCX communication system 106 includes an LCX control device 103, an LCX base station 104, and an LCX antenna 105. The LCX control device 103 manages which LCX antenna 105 of which LCX base station 104 the train 230 is connected to. The size of the LCX cell configured by the LCX antenna 105 is substantially the same as the size of the LCX antenna 105. It is assumed that the area where the train 230 can move is entirely covered by the communication area of the LCX communication system 106, that is, the LCX cell configured by the LCX antenna 105. The LCX cell corresponds to the above-mentioned first communication area.
　図１では、ＬＣＸ通信システム１０６が、ＬＣＸ基地局１０４およびＬＣＸアンテナ１０５を１つずつ備える場合を示しているが一例であり、これに限定されない。ＬＣＸ通信システム１０６は、ＬＣＸ基地局１０４およびＬＣＸアンテナ１０５の組み合わせを複数備えていてもよい。すなわち、ＬＣＸ通信システム１０６の通信エリアは、複数のＬＣＸアンテナ１０５が構成するＬＣＸセルによって形成されていてもよい。 FIG. 1 shows a case where the LCX communication system 106 includes one LCX base station 104 and one LCX antenna 105, but this is an example, and the present invention is not limited to this. The LCX communication system 106 may include a plurality of combinations of the LCX base station 104 and the LCX antenna 105. That is, the communication area of the LCX communication system 106 may be formed by LCX cells composed of a plurality of LCX antennas 105.
　ミリ波通信システム１１１は、地上通信システム１２０において、移動体通信システム２２０が備える、後述するミリ波移動局２０５とミリ波を用いる無線通信を行う無線通信装置である。ミリ波通信システム１１１は、ミリ波制御装置１０７と、ミリ波基地局１０８と、ミリ波アンテナ１０９ａ～１０９ｅと、を備える。ミリ波制御装置１０７は、列車２３０がどのミリ波基地局１０８と接続しているかを管理する。ミリ波基地局１０８は、列車２３０がどのミリ波アンテナ１０９ａ～１０９ｅと接続しているかを管理する。 The millimeter-wave communication system 111 is a wireless communication device provided in the mobile communication system 220 that performs wireless communication using millimeter waves with the millimeter-wave mobile station 205, which will be described later, in the terrestrial communication system 120. The millimeter-wave communication system 111 includes a millimeter-wave control device 107, a millimeter-wave base station 108, and millimeter-wave antennas 109a to 109e. The millimeter wave control device 107 manages which millimeter wave base station 108 the train 230 is connected to. The millimeter-wave base station 108 manages which millimeter-wave antennas 109a to 109e the train 230 is connected to.
　ミリ波は、前述のように、直進性は高いものの距離減衰が大きい。そのため、ミリ波通信システム１１１は、ミリ波アンテナ１０９ａ～１０９ｅに指向性を持たせることで通信可能な距離を伸ばし、かつ複数のミリ波アンテナ１０９ａ～１０９ｅで１つのセルを構成することでセルサイズを確保している。このため、ミリ波アンテナ１０９ａ～１０９ｅは、指向性を持ち、かつミリ波アンテナ１０９ａ～１０９ｅで１つのミリ波セル１１０を構成する。なお、ミリ波セル１１０の大きさは、ＬＣＸアンテナ１０５の大きさ、すなわちＬＣＸセルよりも十分に小さいものとする。ミリ波セル１１０が、前述の第２の通信エリアに相当する。本実施の形態では、地上通信システム１２０において、ミリ波セルが１つであるが、複数のミリ波セルが存在してもよい。すなわち、地上通信システム１２０は、複数のミリ波通信システム１１１を備えていてもよい。以降の説明において、ミリ波アンテナ１０９ａ～１０９ｅを区別しない場合、ミリ波アンテナ１０９と称することがある。地上通信システム１２０は、ミリ波セル１１０において、地上に設置され指向性を持たせた複数のミリ波アンテナ１０９ａ～１０９ｅを介して、移動体通信システム２２０とミリ波の無線通信方式で無線通信が可能である。 As mentioned above, millimeter waves have high straightness but large distance attenuation. Therefore, the millimeter-wave communication system 111 extends the communicable distance by giving directivity to the millimeter-wave antennas 109a to 109e, and constitutes one cell with a plurality of millimeter-wave antennas 109a to 109e to form a cell size. Is secured. Therefore, the millimeter-wave antennas 109a to 109e have directivity, and the millimeter-wave antennas 109a to 109e constitute one millimeter-wave cell 110. The size of the millimeter wave cell 110 is assumed to be sufficiently smaller than the size of the LCX antenna 105, that is, the LCX cell. The millimeter wave cell 110 corresponds to the above-mentioned second communication area. In the present embodiment, the terrestrial communication system 120 has one millimeter-wave cell, but a plurality of millimeter-wave cells may exist. That is, the terrestrial communication system 120 may include a plurality of millimeter-wave communication systems 111. In the following description, when the millimeter wave antennas 109a to 109e are not distinguished, they may be referred to as millimeter wave antennas 109. In the millimeter-wave cell 110, the terrestrial communication system 120 communicates wirelessly with the mobile communication system 220 by a millimeter-wave wireless communication method via a plurality of millimeter-wave antennas 109a to 109e installed on the ground and provided with directivity. It is possible.
　つぎに、列車２３０に搭載される移動体通信システム２２０の構成について説明する。移動体通信システム２２０は、既存アプリ端末２００と、新規アプリ端末２０１と、経路切替装置２０２と、ＬＣＸ移動局２０３と、ＬＣＸアンテナ２０４と、ミリ波移動局２０５と、ミリ波アンテナ２０６と、を備える。既存アプリ端末２００は、音声など、要求される伝送容量の少ないアプリケーションのデータを送受信する無線通信装置である。既存アプリ端末２００は、地上通信システム１２０が備える既存アプリサーバ１００と通信を行う。新規アプリ端末２０１は、画像ファイルの転送など伝送容量の大きいアプリケーションのデータを送受信する無線通信装置である。新規アプリ端末２０１は、地上通信システム１２０が備える新規アプリサーバ１０１と通信を行う。 Next, the configuration of the mobile communication system 220 mounted on the train 230 will be described. The mobile communication system 220 includes an existing application terminal 200, a new application terminal 201, a route switching device 202, an LCX mobile station 203, an LCX antenna 204, a millimeter wave mobile station 205, and a millimeter wave antenna 206. Be prepared. The existing application terminal 200 is a wireless communication device that transmits / receives data of an application having a small required transmission capacity such as voice. The existing application terminal 200 communicates with the existing application server 100 included in the terrestrial communication system 120. The new application terminal 201 is a wireless communication device that transmits / receives data of an application having a large transmission capacity such as transfer of an image file. The new application terminal 201 communicates with the new application server 101 included in the terrestrial communication system 120.
　経路切替装置２０２は、既存アプリ端末２００、新規アプリ端末２０１、ＬＣＸ移動局２０３、およびミリ波移動局２０５と接続している。経路切替装置２０２は、新規アプリ端末２０１で扱われるデータは大容量データのため、新規アプリ端末２０１から取得したデータをミリ波移動局２０５へ転送する。経路切替装置２０２は、既存アプリ端末２００から取得したデータをＬＣＸ移動局２０３またはミリ波移動局２０５へ転送する。経路切替装置２０２が既存アプリ端末２００から取得したデータをＬＣＸ移動局２０３またはミリ波移動局２０５のどちらへ転送するのかを決定する方法については後述する。 The route switching device 202 is connected to the existing application terminal 200, the new application terminal 201, the LCX mobile station 203, and the millimeter wave mobile station 205. Since the data handled by the new application terminal 201 is a large amount of data, the route switching device 202 transfers the data acquired from the new application terminal 201 to the millimeter wave mobile station 205. The route switching device 202 transfers the data acquired from the existing application terminal 200 to the LCX mobile station 203 or the millimeter wave mobile station 205. The method for determining whether the route switching device 202 transfers the data acquired from the existing application terminal 200 to the LCX mobile station 203 or the millimeter wave mobile station 205 will be described later.
　ＬＣＸ移動局２０３は、移動体通信システム２２０において、地上通信システム１２０のＬＣＸ通信システム１０６とＬＣＸを用いる無線通信を行う無線通信装置である。ＬＣＸ移動局２０３は、ＬＣＸアンテナ２０４を介して、地上通信システム１２０のＬＣＸ通信システム１０６とＬＣＸを用いる無線通信を行う。ＬＣＸアンテナ２０４は、ＬＣＸアンテナ１０５の方向に指向性を持つアンテナである。 The LCX mobile station 203 is a wireless communication device that performs wireless communication using the LCX communication system 106 of the terrestrial communication system 120 and the LCX in the mobile communication system 220. The LCX mobile station 203 performs wireless communication using the LCX communication system 106 of the terrestrial communication system 120 and the LCX via the LCX antenna 204. The LCX antenna 204 is an antenna having directivity in the direction of the LCX antenna 105.
　ミリ波移動局２０５は、移動体通信システム２２０において、地上通信システム１２０のミリ波通信システム１１１とミリ波を用いる無線通信を行う無線通信装置である。ミリ波移動局２０５は、ミリ波アンテナ２０６を介して、地上通信システム１２０のミリ波通信システム１１１とミリ波を用いる無線通信を行う。ミリ波アンテナ２０６は、列車２３０の進行方向に指向性を有するアンテナである。ミリ波アンテナ２０６は、列車２３０の進行方向とは逆方向に指向性を有するアンテナであってもよい。列車２３０では、例えば、図１において進行方向が右方向の場合、ミリ波アンテナ２０６の指向性は、列車２３０の進行方向とは逆方向になる。なお、列車２３０は、２つのミリ波アンテナ、具体的には、指向性が進行方向になるミリ波アンテナ２０６および指向性が進行方向とは逆方向になる図示しないミリ波アンテナを備えていてもよい。 The millimeter-wave mobile station 205 is a wireless communication device that performs wireless communication using millimeter waves with the millimeter-wave communication system 111 of the terrestrial communication system 120 in the mobile communication system 220. The millimeter-wave mobile station 205 performs wireless communication using the millimeter-wave with the millimeter-wave communication system 111 of the terrestrial communication system 120 via the millimeter-wave antenna 206. The millimeter wave antenna 206 is an antenna having directivity in the traveling direction of the train 230. The millimeter wave antenna 206 may be an antenna having directivity in a direction opposite to the traveling direction of the train 230. In the train 230, for example, when the traveling direction is in the right direction in FIG. 1, the directivity of the millimeter wave antenna 206 is opposite to the traveling direction of the train 230. Even if the train 230 is provided with two millimeter-wave antennas, specifically, a millimeter-wave antenna 206 whose directivity is in the traveling direction and a millimeter-wave antenna (not shown) whose directivity is in the direction opposite to the traveling direction. Good.
　つづいて、地上通信システム１２０が備える経路切替装置１０２、および移動体通信システム２２０が備える経路切替装置２０２の構成について説明する。本実施の形態では、経路切替装置１０２，２０２は同様の構成のため、経路切替装置１０２を例にして説明する。図２は、実施の形態１に係る地上通信システム１２０が備える経路切替装置１０２の構成例を示すブロック図である。経路切替装置１０２は、有線ネットワークインターフェース部５００と、経路切替部５０１と、ＬＣＸネットワークインターフェース部５０４と、ミリ波ネットワークインターフェース部５０５と、を備える。有線ネットワークインターフェース部５００は、既存アプリサーバ１００および新規アプリサーバ１０１とデータの送受信を行う。有線ネットワークインターフェース部５００は、既存アプリサーバ１００および新規アプリサーバ１０１から受信したデータを経路切替部５０１に転送する。 Next, the configuration of the route switching device 102 included in the terrestrial communication system 120 and the route switching device 202 included in the mobile communication system 220 will be described. In the present embodiment, since the route switching devices 102 and 202 have the same configuration, the route switching device 102 will be described as an example. FIG. 2 is a block diagram showing a configuration example of the route switching device 102 included in the terrestrial communication system 120 according to the first embodiment. The route switching device 102 includes a wired network interface unit 500, a route switching unit 501, an LCX network interface unit 504, and a millimeter wave network interface unit 505. The wired network interface unit 500 transmits / receives data to / from the existing application server 100 and the new application server 101. The wired network interface unit 500 transfers the data received from the existing application server 100 and the new application server 101 to the route switching unit 501.
　経路切替部５０１は、有線ネットワークインターフェース部５００から転送されたデータであって、通信相手である移動体通信システム２２０に送信するデータを、ＬＣＸネットワークインターフェース部５０４またはミリ波ネットワークインターフェース部５０５に出力するかを決定する。すなわち、経路切替部５０１は、データを転送する経路を決定する。経路切替部５０１は、記憶部５０２と、タイマ５０３と、を備える。記憶部５０２は、列車２３０の移動速度と、前述の移動速度のときに列車２３０がミリ波セル１１０を通過する時間に応じた経路切替タイマ値との関係を、複数の移動速度について記憶する。すなわち、記憶部５０２は、列車２３０の移動速度に応じた経路切替プロファイルを記憶している。タイマ５０３は、列車２３０がミリ波セル１１０においてミリ波の無線通信方式で無線通信を開始してからの経過時間をカウントする。経路切替部５０１は、タイマ５０３でカウントされた経過時間が経路切替タイマ値になった場合、移動体通信システム２２０と地上通信システム１２０との間の無線通信方式を、ミリ波の無線通信方式からＬＣＸの無線通信方式に切り替えることを決定する。 The route switching unit 501 outputs the data transferred from the wired network interface unit 500 and transmitted to the mobile communication system 220, which is the communication partner, to the LCX network interface unit 504 or the millimeter-wave network interface unit 505. To decide. That is, the route switching unit 501 determines the route for transferring data. The route switching unit 501 includes a storage unit 502 and a timer 503. The storage unit 502 stores the relationship between the moving speed of the train 230 and the route switching timer value according to the time when the train 230 passes through the millimeter wave cell 110 at the above-mentioned moving speed for a plurality of moving speeds. That is, the storage unit 502 stores the route switching profile according to the moving speed of the train 230. The timer 503 counts the elapsed time since the train 230 started wireless communication in the millimeter wave cell 110 by the millimeter wave wireless communication method. When the elapsed time counted by the timer 503 reaches the route switching timer value, the route switching unit 501 changes the wireless communication system between the mobile communication system 220 and the terrestrial communication system 120 from the millimeter wave wireless communication system. Decide to switch to the LCX wireless communication system.
　経路切替部５０１は、決定した経路に基づいて、有線ネットワークインターフェース部５００から取得したデータを、ＬＣＸネットワークインターフェース部５０４またはミリ波ネットワークインターフェース部５０５に出力する。具体的には、経路切替部５０１は、有線ネットワークインターフェース部５００から取得したデータを、地上通信システム１２０のＬＣＸ通信システム１０６に送信する場合はＬＣＸネットワークインターフェース部５０４に出力し、地上通信システム１２０のミリ波通信システム１１１に送信する場合はミリ波ネットワークインターフェース部５０５に出力する。 The route switching unit 501 outputs the data acquired from the wired network interface unit 500 to the LCX network interface unit 504 or the millimeter wave network interface unit 505 based on the determined route. Specifically, the route switching unit 501 outputs the data acquired from the wired network interface unit 500 to the LCX network interface unit 504 when transmitting the data to the LCX communication system 106 of the terrestrial communication system 120, and outputs the data to the LCX network interface unit 504 of the terrestrial communication system 120. When transmitting to the millimeter-wave communication system 111, it is output to the millimeter-wave network interface unit 505.
　ＬＣＸネットワークインターフェース部５０４は、ＬＣＸを用いる無線通信方式で無線通信を行う無線通信装置であるＬＣＸ通信システム１０６と通信が可能な第１の通信部である。ミリ波ネットワークインターフェース部５０５は、ミリ波を用いる無線通信方式で無線通信を行う無線通信装置であるミリ波通信システム１１１と通信が可能な第２の通信部である。 The LCX network interface unit 504 is a first communication unit capable of communicating with the LCX communication system 106, which is a wireless communication device that performs wireless communication by a wireless communication method using LCX. The millimeter-wave network interface unit 505 is a second communication unit capable of communicating with the millimeter-wave communication system 111, which is a wireless communication device that performs wireless communication by a wireless communication method using millimeter waves.
　なお、移動体通信システム２２０が備える経路切替装置２０２の場合、図２に示す既存アプリサーバ１００、新規アプリサーバ１０１、ＬＣＸ通信システム１０６、およびミリ波通信システム１１１は、それぞれ、既存アプリ端末２００、新規アプリ端末２０１、ＬＣＸ移動局２０３、およびミリ波移動局２０５に置き換わる。 In the case of the route switching device 202 included in the mobile communication system 220, the existing application server 100, the new application server 101, the LCX communication system 106, and the millimeter-wave communication system 111 shown in FIG. 2 are the existing application terminal 200, respectively. It replaces the new application terminal 201, LCX mobile station 203, and millimeter wave mobile station 205.
　経路切替装置１０２の経路切替部５０１が備える記憶部５０２に記憶されている経路切替プロファイルについて説明する。図３は、実施の形態１に係る経路切替装置１０２の経路切替部５０１が備える記憶部５０２に記憶されている列車２３０の移動速度に応じた経路切替プロファイルの例を示す図である。図３に示す経路切替プロファイルは、例えば、列車２３０の移動速度が３６０（ｋｍ／ｈ）の場合、経路切替タイマ値が４７（ｓ）であることを示している。図３で示される経路切替プロファイルの経路切替タイマ値については、列車２３０が経路切替プロファイルで示される移動速度で移動してもミリ波セル１１０の通信エリア外に出てしまうことが無い値を設定しておく。経路切替プロファイルについては、列車２３０を運行する事業者が設定を行うことができるが、これに限定されない。経路切替部５０１は、例えば、実際の列車２３０の移動速度と、図３で示される経路切替プロファイルの移動速度を上から順に比較して、該当する経路切替プロファイルの移動速度に対応する経路切替タイマ値を取得する。なお、図３に示す経路切替プロファイルは一例であって、これに限定されない。経路切替プロファイルにおいて、移動速度の設定は４つ以上あってもよいし、移動速度の記載は「４０＜移動速度≦１２０」のように範囲で指定してもよい。 The route switching profile stored in the storage unit 502 included in the route switching unit 501 of the route switching device 102 will be described. FIG. 3 is a diagram showing an example of a route switching profile according to the moving speed of the train 230 stored in the storage unit 502 included in the route switching unit 501 of the route switching device 102 according to the first embodiment. The route switching profile shown in FIG. 3 shows that, for example, when the moving speed of the train 230 is 360 (km / h), the route switching timer value is 47 (s). Regarding the route switching timer value of the route switching profile shown in FIG. 3, a value is set so that the train 230 does not go out of the communication area of the millimeter wave cell 110 even if the train 230 moves at the moving speed indicated by the route switching profile. I will do it. The route switching profile can be set by the operator operating the train 230, but is not limited to this. The route switching unit 501 compares, for example, the actual moving speed of the train 230 with the moving speed of the route switching profile shown in FIG. 3 in order from the top, and the route switching timer corresponding to the moving speed of the corresponding route switching profile. Get the value. The route switching profile shown in FIG. 3 is an example, and is not limited to this. In the route switching profile, the movement speed may be set to four or more, and the description of the movement speed may be specified in a range such as "40 <movement speed ≤ 120".
　つづいて、無線通信システム４００における地上通信システム１２０の経路切替装置１０２および移動体通信システム２２０の経路切替装置２０２が無線通信方式を切り替える、すなわちデータの経路を切り替える動作について説明する。図４は、実施の形態１に係る無線通信システム４００における地上通信システム１２０の経路切替装置１０２および移動体通信システム２２０の経路切替装置２０２の経路切替動作を示すシーケンス図である。図４では、具体的に、地上通信システム１２０の既存アプリサーバ１００から移動体通信システム２２０の既存アプリ端末２００にデータを送信する際の経路切替動作について説明する。 Subsequently, the operation in which the route switching device 102 of the terrestrial communication system 120 and the route switching device 202 of the mobile communication system 220 in the wireless communication system 400 switch the wireless communication method, that is, the operation of switching the data route will be described. FIG. 4 is a sequence diagram showing a route switching operation of the route switching device 102 of the terrestrial communication system 120 and the route switching device 202 of the mobile communication system 220 in the wireless communication system 400 according to the first embodiment. Specifically, FIG. 4 describes a route switching operation when data is transmitted from the existing application server 100 of the terrestrial communication system 120 to the existing application terminal 200 of the mobile communication system 220.
　ここで、地上通信システム１２０の既存アプリサーバ１００、新規アプリサーバ１０１、経路切替装置１０２、ＬＣＸ通信システム１０６、およびミリ波通信システム１１１は起動を完了しているものとする。また、図１に示すように、列車２３０は、ＬＣＸアンテナ１０５の通信エリアではあるものの、ミリ波セル１１０より手前の位置で電源が投入され、その後ミリ波セル１１０の通信エリアに向かうものとする。 Here, it is assumed that the existing application server 100, the new application server 101, the route switching device 102, the LCX communication system 106, and the millimeter wave communication system 111 of the terrestrial communication system 120 have been started. Further, as shown in FIG. 1, although the train 230 is in the communication area of the LCX antenna 105, the power is turned on at a position in front of the millimeter wave cell 110, and then the train 230 heads for the communication area of the millimeter wave cell 110. ..
　図示しない運転士などが列車２３０の電源を投入すると、列車２３０では、移動体通信システム２２０の既存アプリ端末２００、新規アプリ端末２０１、経路切替装置２０２、ＬＣＸ移動局２０３、ＬＣＸアンテナ２０４、ミリ波移動局２０５、およびミリ波アンテナ２０６が起動する。列車２３０は、図１に示すように、ＬＣＸアンテナ１０５の通信エリアに存在する。そのため、移動体通信システム２２０のＬＣＸ移動局２０３は、ＬＣＸ基地局１０４を介して、ＬＣＸ制御装置１０３にＬＣＸアンテナ１０５の通信エリアに在線していることを登録する（ステップＳ１０１）。 When a driver or the like (not shown) turns on the power of the train 230, the train 230 has an existing application terminal 200 of the mobile communication system 220, a new application terminal 201, a route switching device 202, an LCX mobile station 203, an LCX antenna 204, and a millimeter wave. The mobile station 205 and the millimeter-wave antenna 206 are activated. As shown in FIG. 1, the train 230 exists in the communication area of the LCX antenna 105. Therefore, the LCX mobile station 203 of the mobile communication system 220 registers with the LCX control device 103 that it is in the communication area of the LCX antenna 105 via the LCX base station 104 (step S101).
　ＬＣＸ制御装置１０３は、経路切替装置１０２に対して、列車２３０がＬＣＸ通信システム１０６経由で通信可能であることを経路情報通知によって通知する（ステップＳ１０２）。経路切替装置１０２では、ＬＣＸネットワークインターフェース部５０４が、経路情報通知を受信し、経路切替部５０１に転送する。経路切替部５０１は、列車２３０がＬＣＸ通信システム１０６経由で通信可能であるという経路情報を保持する。 The LCX control device 103 notifies the route switching device 102 that the train 230 can communicate via the LCX communication system 106 by means of a route information notification (step S102). In the route switching device 102, the LCX network interface unit 504 receives the route information notification and transfers it to the route switching unit 501. The route switching unit 501 holds the route information that the train 230 can communicate via the LCX communication system 106.
　ＬＣＸ移動局２０３は、経路切替装置２０２に対して、列車２３０がＬＣＸ通信システム１０６経由で通信可能であることを経路情報通知によって通知する（ステップＳ１０３）。経路切替装置２０２では、ＬＣＸネットワークインターフェース部５０４が、経路情報通知を受信し、経路切替部５０１に転送する。経路切替部５０１は、列車２３０がＬＣＸ通信システム１０６経由で通信可能であるという経路情報を保持する。 The LCX mobile station 203 notifies the route switching device 202 that the train 230 can communicate via the LCX communication system 106 by means of a route information notification (step S103). In the route switching device 202, the LCX network interface unit 504 receives the route information notification and transfers it to the route switching unit 501. The route switching unit 501 holds the route information that the train 230 can communicate via the LCX communication system 106.
　これにより、無線通信システム４００において、既存アプリサーバ１００および既存アプリ端末２００は、図４に示すように、経路切替装置１０２、ＬＣＸ制御装置１０３、ＬＣＸ基地局１０４、ＬＣＸ移動局２０３、および経路切替装置２０２を経由して通信を行うことができる（ステップＳ１０４）。 As a result, in the wireless communication system 400, the existing application server 100 and the existing application terminal 200 have the route switching device 102, the LCX control device 103, the LCX base station 104, the LCX mobile station 203, and the route switching, as shown in FIG. Communication can be performed via the device 202 (step S104).
　列車２３０が移動してミリ波セル１１０の通信エリアに入ると、移動体通信システム２２０のミリ波移動局２０５は、ミリ波基地局１０８を介して、ミリ波制御装置１０７にミリ波セル１１０の通信エリアに在線していることを登録する（ステップＳ１０５）。このとき、ミリ波移動局２０５は、ミリ波制御装置１０７に列車２３０の移動速度を登録する。すなわち、移動体通信システム２２０は、列車２３０の移動速度を地上通信システム１２０に通知する。 When the train 230 moves and enters the communication area of the millimeter wave cell 110, the millimeter wave mobile station 205 of the mobile communication system 220 sends the millimeter wave cell 110 to the millimeter wave control device 107 via the millimeter wave base station 108. Register that you are in the communication area (step S105). At this time, the millimeter wave mobile station 205 registers the moving speed of the train 230 in the millimeter wave control device 107. That is, the mobile communication system 220 notifies the ground communication system 120 of the moving speed of the train 230.
　ミリ波制御装置１０７は、経路切替装置１０２に対して、列車２３０がミリ波通信システム１１１経由で通信可能であること、および列車２３０の移動速度を経路情報通知によって通知する（ステップＳ１０６）。経路切替装置１０２では、ミリ波ネットワークインターフェース部５０５が、経路情報通知を受信し、経路切替部５０１に転送する。経路切替部５０１は、列車２３０がミリ波通信システム１１１経由で通信可能であるという経路情報、および列車２３０の移動速度情報を保持する。 The millimeter-wave control device 107 notifies the route switching device 102 that the train 230 can communicate via the millimeter-wave communication system 111 and the moving speed of the train 230 by route information notification (step S106). In the route switching device 102, the millimeter-wave network interface unit 505 receives the route information notification and transfers it to the route switching unit 501. The route switching unit 501 holds the route information that the train 230 can communicate via the millimeter-wave communication system 111 and the moving speed information of the train 230.
　ミリ波移動局２０５は、経路切替装置２０２に対して、列車２３０がミリ波通信システム１１１経由で通信可能であること、および列車２３０の移動速度を経路情報通知によって通知する（ステップＳ１０７）。経路切替装置２０２では、ミリ波ネットワークインターフェース部５０５が、経路情報通知を受信し、経路切替部５０１に転送する。経路切替部５０１は、列車２３０がミリ波通信システム１１１経由で通信可能であるという経路情報、および列車２３０の移動速度情報を保持する。 The millimeter-wave mobile station 205 notifies the route switching device 202 that the train 230 can communicate via the millimeter-wave communication system 111 and the moving speed of the train 230 by route information notification (step S107). In the route switching device 202, the millimeter-wave network interface unit 505 receives the route information notification and transfers it to the route switching unit 501. The route switching unit 501 holds the route information that the train 230 can communicate via the millimeter-wave communication system 111 and the moving speed information of the train 230.
　これにより、無線通信システム４００において、既存アプリサーバ１００および既存アプリ端末２００は、図４に示すように、経路切替装置１０２、ミリ波制御装置１０７、ミリ波基地局１０８、ミリ波移動局２０５、および経路切替装置２０２を経由して通信を行うことができる（ステップＳ１０８）。 As a result, in the wireless communication system 400, the existing application server 100 and the existing application terminal 200 have the route switching device 102, the millimeter wave control device 107, the millimeter wave base station 108, and the millimeter wave mobile station 205, as shown in FIG. And communication can be performed via the route switching device 202 (step S108).
　ステップＳ１０６で経路情報通知を受信した経路切替装置１０２の経路切替部５０１は、経路情報通知に含まれる列車２３０の移動速度に基づいて、記憶部５０２に格納されている経路切替プロファイルから列車２３０の移動速度に対応する経路切替プロファイルを選択する（ステップＳ１０９）。経路切替部５０１は、例えば、列車２３０の移動速度が３００（ｋｍ／ｈ）の場合、列車２３０の移動速度（ｋｍ／ｈ）が「３６０以下」、経路切替タイマ値（ｓ）が「４７」の経路切替プロファイルを選択する。これにより、経路切替部５０１は、タイマ５０３に経路切替タイマ値の４７（ｓ）を設定し、タイマ５０３によるカウントを開始する（ステップＳ１１０）。 The route switching unit 501 of the route switching device 102 that received the route information notification in step S106 uses the route switching profile stored in the storage unit 502 to determine the train 230 based on the moving speed of the train 230 included in the route information notification. A route switching profile corresponding to the moving speed is selected (step S109). For example, when the moving speed of the train 230 is 300 (km / h), the route switching unit 501 has a moving speed (km / h) of the train 230 of "360 or less" and a route switching timer value (s) of "47". Select the route switching profile of. As a result, the route switching unit 501 sets the path switching timer value 47 (s) in the timer 503 and starts counting by the timer 503 (step S110).
　同様に、ステップＳ１０７で経路情報通知を受信した経路切替装置２０２の経路切替部５０１は、経路情報通知に含まれる列車２３０の移動速度に基づいて記憶部５０２に格納されている経路切替プロファイルから列車２３０の移動速度に対応する経路切替プロファイルを選択する（ステップＳ１１１）。経路切替部５０１は、例えば、列車２３０の移動速度が３００（ｋｍ／ｈ）の場合、列車２３０の移動速度（ｋｍ／ｈ）が「３６０以下」、経路切替タイマ値（ｓ）が「４７」の経路切替プロファイルを選択する。これにより、経路切替部５０１は、タイマ５０３に経路切替タイマ値の４７（ｓ）を設定し、タイマ５０３によるカウントを開始する（ステップＳ１１２）。 Similarly, the route switching unit 501 of the route switching device 202 that received the route information notification in step S107 is a train from the route switching profile stored in the storage unit 502 based on the moving speed of the train 230 included in the route information notification. A route switching profile corresponding to the movement speed of 230 is selected (step S111). For example, when the moving speed of the train 230 is 300 (km / h), the route switching unit 501 has a moving speed (km / h) of the train 230 of "360 or less" and a route switching timer value (s) of "47". Select the route switching profile of. As a result, the route switching unit 501 sets the path switching timer value 47 (s) in the timer 503 and starts counting by the timer 503 (step S112).
　列車２３０が移動するとともに時間が経過し、経路切替装置１０２の経路切替部５０１が設定した経路切替タイマ値が満了した場合、すなわち経路切替タイマ値で設定された期間が経過した場合、経路切替部５０１は、列車２３０がミリ波通信システム１１１経由での通信が不可になると判断し、ＬＣＸ通信システム１０６経由での通信に経路を切り替える（ステップＳ１１３）。 When the time elapses as the train 230 moves and the route switching timer value set by the route switching unit 501 of the route switching device 102 expires, that is, when the period set by the route switching timer value elapses, the route switching unit 501 determines that the train 230 cannot communicate via the millimeter-wave communication system 111, and switches the route to communication via the LCX communication system 106 (step S113).
　同様に、列車２３０が移動するとともに時間が経過し、経路切替装置２０２の経路切替部５０１が設定した経路切替タイマ値が満了した場合、すなわち経路切替タイマ値で設定された期間が経過した場合、経路切替部５０１は、列車２３０がミリ波通信システム１１１経由での通信が不可になると判断し、ＬＣＸ通信システム１０６経由での通信に経路を切り替える（ステップＳ１１４）。 Similarly, when the time elapses as the train 230 moves and the route switching timer value set by the route switching unit 501 of the route switching device 202 expires, that is, when the period set by the route switching timer value elapses. The route switching unit 501 determines that the train 230 cannot communicate via the millimeter-wave communication system 111, and switches the route to communication via the LCX communication system 106 (step S114).
　これにより、無線通信システム４００において、既存アプリサーバ１００および既存アプリ端末２００は、図４に示すように、経路切替装置１０２、ＬＣＸ制御装置１０３、ＬＣＸ基地局１０４、ＬＣＸ移動局２０３、および経路切替装置２０２を経由して通信を行うことができる（ステップＳ１１５）。 As a result, in the wireless communication system 400, the existing application server 100 and the existing application terminal 200 have the route switching device 102, the LCX control device 103, the LCX base station 104, the LCX mobile station 203, and the route switching, as shown in FIG. Communication can be performed via the device 202 (step S115).
　なお、本実施の形態では、ミリ波通信システム１１１のミリ波制御装置１０７が、経路情報通知によって、経路切替装置１０２へ列車２３０の移動速度を通知していたが、同時にミリ波セル１１０のサイズ情報を通知してもよい。これにより、経路切替装置１０２の経路切替部５０１は、移動速度およびミリ波セル１１０のサイズ情報を用いることで、列車２３０がミリ波セル１１０を通過する時間である経路切替タイマ値を精度良く算出することができる。 In the present embodiment, the millimeter wave control device 107 of the millimeter wave communication system 111 notifies the route switching device 102 of the moving speed of the train 230 by the route information notification, but at the same time, the size of the millimeter wave cell 110. Information may be notified. As a result, the route switching unit 501 of the route switching device 102 accurately calculates the route switching timer value, which is the time for the train 230 to pass through the millimeter wave cell 110, by using the moving speed and the size information of the millimeter wave cell 110. can do.
　本実施の形態では、列車２３０が移動する経路を全てカバーする通信システムとしてＬＣＸ通信システム１０６を想定し、列車２３０が移動する経路の一部をカバーする高速な通信システムとしてミリ波通信システム１１１を想定しているが、一例であり、これに限定されない。列車２３０が移動する経路を全てカバーする通信システムは、ＬＣＸ通信システム１０６以外の通信システムであってもよい。また、列車２３０が移動する経路の一部をカバーする高速な通信システムは、ミリ波通信システム１１１以外の通信システムであってもよい。 In the present embodiment, the LCX communication system 106 is assumed as a communication system that covers all the routes on which the train 230 travels, and the millimeter-wave communication system 111 is used as a high-speed communication system that covers a part of the routes on which the train 230 travels. It is assumed, but it is an example and is not limited to this. The communication system that covers all the routes on which the train 230 travels may be a communication system other than the LCX communication system 106. Further, the high-speed communication system that covers a part of the route on which the train 230 moves may be a communication system other than the millimeter-wave communication system 111.
　実施の形態１において、無線通信システム４００は、移動体通信システム２２０および地上通信システム１２０の両方が、データの転送先を切り替える経路切替装置を備えるシステムである。 In the first embodiment, the wireless communication system 400 is a system in which both the mobile communication system 220 and the terrestrial communication system 120 are provided with a route switching device for switching a data transfer destination.
　つづいて、経路切替装置１０２，２０２のハードウェア構成について説明する。経路切替装置１０２，２０２において、有線ネットワークインターフェース部５００、ＬＣＸネットワークインターフェース部５０４、およびミリ波ネットワークインターフェース部５０５は、通信機により実現される。経路切替部５０１は処理回路により実現される。処理回路は、メモリに格納されるプログラムを実行するプロセッサおよびメモリであってもよいし、専用のハードウェアであってもよい。処理回路は制御回路とも呼ばれる。 Next, the hardware configuration of the route switching devices 102 and 202 will be described. In the route switching devices 102 and 202, the wired network interface unit 500, the LCX network interface unit 504, and the millimeter wave network interface unit 505 are realized by a communication device. The route switching unit 501 is realized by a processing circuit. The processing circuit may be a processor and memory for executing a program stored in the memory, or may be dedicated hardware. The processing circuit is also called a control circuit.
　図５は、実施の形態１に係る経路切替装置１０２，２０２が備える処理回路をプロセッサおよびメモリで実現する場合の処理回路９０の構成例を示す図である。図５に示す処理回路９０は制御回路であり、プロセッサ９１およびメモリ９２を備える。処理回路９０がプロセッサ９１およびメモリ９２で構成される場合、処理回路９０の各機能は、ソフトウェア、ファームウェア、またはソフトウェアとファームウェアとの組み合わせにより実現される。ソフトウェアまたはファームウェアはプログラムとして記述され、メモリ９２に格納される。処理回路９０では、メモリ９２に記憶されたプログラムをプロセッサ９１が読み出して実行することにより、各機能を実現する。すなわち、処理回路９０は、経路切替装置１０２，２０２の処理が結果的に実行されることになるプログラムを格納するためのメモリ９２を備える。このプログラムは、処理回路９０により実現される各機能を経路切替装置１０２，２０２に実行させるためのプログラムであるともいえる。このプログラムは、プログラムが記憶された記憶媒体により提供されてもよいし、通信媒体など他の手段により提供されてもよい。 FIG. 5 is a diagram showing a configuration example of a processing circuit 90 when the processing circuit included in the route switching devices 102 and 202 according to the first embodiment is realized by a processor and a memory. The processing circuit 90 shown in FIG. 5 is a control circuit and includes a processor 91 and a memory 92. When the processing circuit 90 is composed of the processor 91 and the memory 92, each function of the processing circuit 90 is realized by software, firmware, or a combination of software and firmware. The software or firmware is written as a program and stored in the memory 92. In the processing circuit 90, each function is realized by the processor 91 reading and executing the program stored in the memory 92. That is, the processing circuit 90 includes a memory 92 for storing a program in which the processing of the route switching devices 102 and 202 is eventually executed. It can be said that this program is a program for causing the route switching devices 102 and 202 to execute each function realized by the processing circuit 90. This program may be provided by a storage medium in which the program is stored, or may be provided by other means such as a communication medium.
　上記プログラムは、経路切替部５０１が、通信相手に送信するデータを、第１の無線通信方式で無線通信を行う無線通信装置と通信が可能な第１の通信部、または第２の無線通信方式で無線通信を行う無線通信装置と通信が可能な第２の通信部に出力するかを決定する第１のステップと、経路切替部５０１が、第１のステップでの決定に基づいて、データを第１の通信部または第２の通信部に出力する第２のステップと、を経路切替装置１０２，２０２に実行させるプログラムであるとも言える。 In the above program, the route switching unit 501 can communicate the data transmitted to the communication partner with the wireless communication device that performs wireless communication by the first wireless communication method, or the first communication unit or the second wireless communication method. The first step of determining whether to output to the second communication unit capable of communicating with the wireless communication device that performs wireless communication in the above, and the route switching unit 501, based on the determination in the first step, outputs data. It can also be said that the program causes the route switching devices 102 and 202 to execute the second step of outputting to the first communication unit or the second communication unit.
　ここで、プロセッサ９１は、例えば、ＣＰＵ（Central　Processing　Unit）、処理装置、演算装置、マイクロプロセッサ、マイクロコンピュータ、またはＤＳＰ（Digital　Signal　Processor）などである。また、メモリ９２は、例えば、ＲＡＭ（Random　Access　Memory）、ＲＯＭ（Read　Only　Memory）、フラッシュメモリ、ＥＰＲＯＭ（Erasable　Programmable　ＲＯＭ）、ＥＥＰＲＯＭ（登録商標）（Electrically　ＥＰＲＯＭ）などの、不揮発性または揮発性の半導体メモリ、磁気ディスク、フレキシブルディスク、光ディスク、コンパクトディスク、ミニディスク、またはＤＶＤ（Digital　Versatile　Disc）などが該当する。 Here, the processor 91 is, for example, a CPU (Central Processing Unit), a processing device, an arithmetic unit, a microprocessor, a microcomputer, a DSP (Digital Signal Processor), or the like. The memory 92 is, for example, non-volatile or volatile such as RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable ROM), EEPROM (registered trademark) (Electrically EPROM). This includes semiconductor memories, magnetic disks, flexible disks, optical disks, compact disks, mini disks, DVDs (Digital Versatile Disc), and the like.
　図６は、実施の形態１に係る経路切替装置１０２，２０２が備える処理回路を専用のハードウェアで構成する場合の処理回路９３の例を示す図である。図６に示す処理回路９３は、例えば、単一回路、複合回路、プログラム化したプロセッサ、並列プログラム化したプロセッサ、ＡＳＩＣ（Application　Specific　Integrated　Circuit）、ＦＰＧＡ（Field　Programmable　Gate　Array）、またはこれらを組み合わせたものが該当する。処理回路については、一部を専用のハードウェアで実現し、一部をソフトウェアまたはファームウェアで実現するようにしてもよい。このように、処理回路は、専用のハードウェア、ソフトウェア、ファームウェア、またはこれらの組み合わせによって、上述の各機能を実現することができる。 FIG. 6 is a diagram showing an example of a processing circuit 93 when the processing circuits included in the route switching devices 102 and 202 according to the first embodiment are configured by dedicated hardware. The processing circuit 93 shown in FIG. 6 is, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a combination thereof. The thing is applicable. As for the processing circuit, a part may be realized by dedicated hardware and a part may be realized by software or firmware. As described above, the processing circuit can realize each of the above-mentioned functions by the dedicated hardware, software, firmware, or a combination thereof.
　以上説明したように、本実施の形態によれば、無線通信システム４００において、地上通信システム１２０の経路切替装置１０２、および移動体通信システム２２０の経路切替装置２０２は、データの送受信に使用する無線通信方式としてミリ波の無線通信方式を開始した場合、列車２３０の移動速度に応じた経路切替プロファイルを選択し、経路切替プロファイルに記載された経路切替タイマ値に基づいて、ミリ波の無線通信方式からＬＣＸの無線通信方式への経路切替を行うこととした。これにより、経路切替装置１０２，２０２は、無線通信システム４００において、列車２３０がミリ波セル１１０から離れてしまう前に、すなわち通信が途絶えることなく無線通信方式を切り替えることができる。経路切替装置１０２，２０２は、既存アプリのデータロスを防止することができる。 As described above, according to the present embodiment, in the wireless communication system 400, the route switching device 102 of the terrestrial communication system 120 and the route switching device 202 of the mobile communication system 220 are wireless used for transmitting and receiving data. When the millimeter-wave wireless communication method is started as the communication method, the route switching profile according to the moving speed of the train 230 is selected, and the millimeter-wave wireless communication method is selected based on the route switching timer value described in the route switching profile. To switch the route to the LCX wireless communication system. As a result, the route switching devices 102 and 202 can switch the wireless communication method in the wireless communication system 400 before the train 230 leaves the millimeter wave cell 110, that is, without interruption of communication. The route switching devices 102 and 202 can prevent data loss of the existing application.
実施の形態２．
　実施の形態１では、移動体通信システム２２０の経路切替装置２０２および地上通信システム１２０の経路切替装置１０２が、ともにミリ波の無線通信方式からＬＣＸの無線通信方式への切り替えの決定を行っていた。実施の形態２では、移動体通信システムの経路切替装置のみがミリ波の無線通信方式からＬＣＸの無線通信方式への切り替えの決定を行う場合について説明する。 Embodiment 2.
In the first embodiment, the route switching device 202 of the mobile communication system 220 and the route switching device 102 of the terrestrial communication system 120 both determine the switching from the millimeter-wave wireless communication system to the LCX wireless communication system. .. In the second embodiment, a case where only the route switching device of the mobile communication system determines the switching from the millimeter wave wireless communication system to the LCX wireless communication system will be described.
　図７は、実施の形態２に係る無線通信システム４００ａの構成例を示す図である。無線通信システム４００ａは、地上通信システム１２０と、移動体通信システム２２０ａと、を備える。移動体通信システム２２０ａは、列車２３０ａに搭載され、地上に設置される地上通信システム１２０と無線通信を行うシステムである。移動体通信システム２２０ａは、図１に示す実施の形態１の移動体通信システム２２０に対して、経路切替装置２０２を経路切替装置２０２ａに置き換え、さらに、カメラ２０７および画像解析装置２０８を追加したものである。 FIG. 7 is a diagram showing a configuration example of the wireless communication system 400a according to the second embodiment. The wireless communication system 400a includes a terrestrial communication system 120 and a mobile communication system 220a. The mobile communication system 220a is a system mounted on the train 230a and performing wireless communication with the ground communication system 120 installed on the ground. The mobile communication system 220a replaces the route switching device 202 with the route switching device 202a, and further adds a camera 207 and an image analysis device 208 to the mobile communication system 220 of the first embodiment shown in FIG. Is.
　カメラ２０７は、列車２３０ａの進行方向または進行方向の逆方向を撮影する撮影部である。カメラ２０７は、撮影によって得られた画像情報を画像解析装置２０８に出力する。画像解析装置２０８は、カメラ２０７から画像情報を取得する。画像解析装置２０８は、カメラ２０７から取得した画像情報を解析し、解析結果を経路切替装置２０２ａに出力する。 The camera 207 is a photographing unit that photographs the traveling direction of the train 230a or the direction opposite to the traveling direction. The camera 207 outputs the image information obtained by the photographing to the image analysis device 208. The image analysis device 208 acquires image information from the camera 207. The image analysis device 208 analyzes the image information acquired from the camera 207 and outputs the analysis result to the route switching device 202a.
　図８は、実施の形態２に係る移動体通信システム２２０ａが備える経路切替装置２０２ａの構成例を示すブロック図である。経路切替装置２０２ａは、有線ネットワークインターフェース部５００と、経路切替部５０１ａと、ＬＣＸネットワークインターフェース部５０４と、ミリ波ネットワークインターフェース部５０５と、を備える。経路切替部５０１ａは、有線ネットワークインターフェース部５００から出力されたデータであって、通信相手である地上通信システム１２０に送信するデータを、ＬＣＸネットワークインターフェース部５０４またはミリ波ネットワークインターフェース部５０５に出力するかを決定する。 FIG. 8 is a block diagram showing a configuration example of the route switching device 202a included in the mobile communication system 220a according to the second embodiment. The route switching device 202a includes a wired network interface unit 500, a route switching unit 501a, an LCX network interface unit 504, and a millimeter wave network interface unit 505. Whether the route switching unit 501a outputs the data output from the wired network interface unit 500 to the terrestrial communication system 120, which is the communication partner, to the LCX network interface unit 504 or the millimeter-wave network interface unit 505. To determine.
　経路切替部５０１ａは、画像解析装置２０８から取得した解析結果に基づいて、通信相手に送信するデータをＬＣＸネットワークインターフェース部５０４またはミリ波ネットワークインターフェース部５０５に出力するかを決定する。例えば、経路切替部５０１ａは、地上に設置される複数のミリ波アンテナ１０９ａ～１０９ｅのうち規定された数のミリ波アンテナ１０９をカウントした場合、移動体通信システム２２０ａと地上通信システム１２０との間の無線通信の方式を、ミリ波の無線通信方式からＬＣＸの無線通信方式に切り替えることを決定する。 The route switching unit 501a determines whether to output the data to be transmitted to the communication partner to the LCX network interface unit 504 or the millimeter wave network interface unit 505 based on the analysis result acquired from the image analysis device 208. For example, when the route switching unit 501a counts a specified number of millimeter-wave antennas 109 among a plurality of millimeter-wave antennas 109a to 109e installed on the ground, it is between the mobile communication system 220a and the terrestrial communication system 120. It is decided to switch the wireless communication system of the above from the millimeter wave wireless communication system to the LCX wireless communication system.
　具体的には、経路切替部５０１ａは、列車２３０ａの移動速度が規定された移動速度閾値未満の場合は列車２３０ａの移動速度が低速として、ミリ波アンテナ１０９ｅから開始して５本目のミリ波アンテナ１０９ａをカウントしたとき、ミリ波の無線通信方式からＬＣＸの無線通信方式に切り替えることを決定する。すなわち、経路切替部５０１ａは、列車２３０ａがミリ波アンテナ１０９ａの位置であるミリ波セル１１０のセル端に到達したとき、ミリ波の無線通信方式からＬＣＸの無線通信方式に切り替えることを決定する。また、経路切替部５０１ａは、列車２３０ａの移動速度が規定された移動速度閾値以上の場合は列車２３０ａの移動速度が高速として、ミリ波アンテナ１０９ｅから開始して４本目のミリ波アンテナ１０９ｂをカウントしたとき、ミリ波の無線通信方式からＬＣＸの無線通信方式に切り替えることを決定する。すなわち、経路切替部５０１ａは、ミリ波セル１１０のセル端に対して余裕を持って、ミリ波の無線通信方式からＬＣＸの無線通信方式に切り替えることを決定する。 Specifically, when the moving speed of the train 230a is less than the specified moving speed threshold, the route switching unit 501a assumes that the moving speed of the train 230a is low, and starts from the millimeter wave antenna 109e and is the fifth millimeter wave antenna. When the 109a is counted, it is decided to switch from the millimeter wave wireless communication system to the LCX wireless communication system. That is, when the train 230a reaches the cell end of the millimeter wave cell 110, which is the position of the millimeter wave antenna 109a, the route switching unit 501a determines to switch from the millimeter wave wireless communication system to the LCX wireless communication system. Further, when the moving speed of the train 230a is equal to or higher than the specified moving speed threshold, the route switching unit 501a counts the fourth millimeter wave antenna 109b starting from the millimeter wave antenna 109e, assuming that the moving speed of the train 230a is high. At that time, it is decided to switch from the millimeter wave wireless communication system to the LCX wireless communication system. That is, the route switching unit 501a determines to switch from the millimeter wave wireless communication system to the LCX wireless communication system with a margin with respect to the cell end of the millimeter wave cell 110.
　なお、地上通信システム１２０が備える経路切替装置１０２については、実施の形態１と同様の構成であってもよいし、図２に示す経路切替装置１０２の経路切替部５０１を、記憶部５０２およびタイマ５０３を削除した経路切替部に置き換えてもよい。 The route switching device 102 included in the terrestrial communication system 120 may have the same configuration as that of the first embodiment, and the route switching unit 501 of the route switching device 102 shown in FIG. 2 may be a storage unit 502 and a timer. 503 may be replaced with the deleted route switching unit.
　つづいて、無線通信システム４００ａにおける移動体通信システム２２０ａの経路切替装置２０２ａが無線通信方式を切り替える、すなわちデータの経路を切り替える動作について説明する。図９は、実施の形態２に係る無線通信システム４００ａにおける移動体通信システム２２０ａの経路切替装置２０２ａの経路切替動作を示すシーケンス図である。図９では、具体的に、地上通信システム１２０の既存アプリサーバ１００から移動体通信システム２２０ａの既存アプリ端末２００にデータを送信する際の経路切替動作について説明する。なお、ステップＳ２０１からステップＳ２０８までは、図４に示す実施の形態１のときのシーケンス図のステップＳ１０１からステップＳ１０８と同様のため説明を省略する。 Next, an operation in which the route switching device 202a of the mobile communication system 220a in the wireless communication system 400a switches the wireless communication method, that is, the operation of switching the data path will be described. FIG. 9 is a sequence diagram showing a route switching operation of the route switching device 202a of the mobile communication system 220a in the wireless communication system 400a according to the second embodiment. Specifically, FIG. 9 describes a route switching operation when data is transmitted from the existing application server 100 of the terrestrial communication system 120 to the existing application terminal 200 of the mobile communication system 220a. Since steps S201 to S208 are the same as steps S101 to S108 in the sequence diagram of the first embodiment shown in FIG. 4, the description thereof will be omitted.
　ミリ波移動局２０５は、ステップＳ２０７で経路情報通知を送信すると、画像解析装置２０８に対して、画像解析開始通知を送信する（ステップＳ２０９）。画像解析開始通知を受信した画像解析装置２０８は、カメラ２０７から取得した画像情報の解析を開始する（ステップＳ２１０）。画像解析装置２０８は、画像情報を解析した解析結果を経路切替装置２０２ａに送信する（ステップＳ２１１）。 When the millimeter wave mobile station 205 transmits the route information notification in step S207, the millimeter wave mobile station 205 transmits an image analysis start notification to the image analysis device 208 (step S209). The image analysis device 208 that has received the image analysis start notification starts the analysis of the image information acquired from the camera 207 (step S210). The image analysis device 208 transmits the analysis result of analyzing the image information to the route switching device 202a (step S211).
　経路切替装置２０２ａの経路切替部５０１ａは、前述のように、規定された数のミリ波アンテナ１０９をカウントした場合（ステップＳ２１２）、列車２３０ａがミリ波通信システム１１１経由での通信が不可になると判断する。経路切替装置２０２ａの経路切替部５０１ａは、移動体通信システム２２０ａと地上通信システム１２０との間の無線通信の方式を、ミリ波の無線通信方式からＬＣＸの無線通信方式に切り替えることを決定する。経路切替装置２０２ａの経路切替部５０１ａは、経路切替装置１０２にミリ波通信システム１１１を用いて経路情報通知を送信する（ステップＳ２１３）。経路切替装置２０２ａの経路切替部５０１ａは、ＬＣＸ通信システム１０６経由での通信に経路を切り替える（ステップＳ２１４）。 As described above, when the route switching unit 501a of the route switching device 202a counts the specified number of millimeter-wave antennas 109 (step S212), when the train 230a cannot communicate via the millimeter-wave communication system 111. to decide. The route switching unit 501a of the route switching device 202a determines to switch the wireless communication system between the mobile communication system 220a and the terrestrial communication system 120 from the millimeter wave wireless communication system to the LCX wireless communication system. The route switching unit 501a of the route switching device 202a transmits a route information notification to the route switching device 102 using the millimeter-wave communication system 111 (step S213). The route switching unit 501a of the route switching device 202a switches the route to communication via the LCX communication system 106 (step S214).
　ステップＳ２１３において経路情報通知を受信した経路切替装置１０２は、列車２３０ａがミリ波通信システム１１１経由での通信が不可になると判断し、ＬＣＸ通信システム１０６経由での通信に経路を切り替える（ステップＳ２１５）。 The route switching device 102 that received the route information notification in step S213 determines that the train 230a cannot communicate via the millimeter-wave communication system 111, and switches the route to communication via the LCX communication system 106 (step S215). ..
　これにより、無線通信システム４００ａにおいて、既存アプリサーバ１００および既存アプリ端末２００は、図９に示すように、経路切替装置１０２、ＬＣＸ制御装置１０３、ＬＣＸ基地局１０４、ＬＣＸ移動局２０３、および経路切替装置２０２ａを経由して通信を行うことができる（ステップＳ２１６）。 As a result, in the wireless communication system 400a, the existing application server 100 and the existing application terminal 200 have the route switching device 102, the LCX control device 103, the LCX base station 104, the LCX mobile station 203, and the route switching, as shown in FIG. Communication can be performed via the device 202a (step S216).
　なお、本実施の形態では、画像解析装置２０８は、ミリ波移動局２０５から画像解析開始通知を受信することで画像解析を開始しているが、これに限定されない。画像解析装置２０８は、ミリ波移動局２０５から画像解析開始通知を受信しなくても常に画像解析を実施するようにしてもよい。 In the present embodiment, the image analysis device 208 starts the image analysis by receiving the image analysis start notification from the millimeter wave mobile station 205, but the present invention is not limited to this. The image analysis device 208 may always perform image analysis without receiving the image analysis start notification from the millimeter wave mobile station 205.
　また、経路切替装置２０２ａの経路切替部５０１ａは、ミリ波通信システム１１１を用いて経路切替装置１０２に経路情報通知を送信していたが、ＬＣＸ通信システム１０６を用いて経路切替装置１０２に経路情報通知を送信してもよい。 Further, the route switching unit 501a of the route switching device 202a transmits the route information notification to the route switching device 102 using the millimeter wave communication system 111, but the route information to the route switching device 102 using the LCX communication system 106. Notifications may be sent.
　また、画像解析装置２０８については、経路切替装置２０２ａが備えてもよい。また、経路切替部５０１ａが、画像解析装置２０８の機能を持つようにしてもよい。 Further, the image analysis device 208 may be provided with the route switching device 202a. Further, the route switching unit 501a may have the function of the image analysis device 208.
　実施の形態２において、無線通信システム４００ａは、移動体通信システム２２０ａが、データの転送先を切り替える経路切替装置２０２ａを備えるシステムである。 In the second embodiment, the wireless communication system 400a is a system in which the mobile communication system 220a includes a route switching device 202a for switching a data transfer destination.
　以上説明したように、本実施の形態によれば、無線通信システム４００ａにおいて、移動体通信システム２２０ａの経路切替装置２０２ａは、画像解析装置２０８から取得した解析結果に基づいて、複数のミリ波アンテナ１０９のうち規定された数のアンテナをカウントした場合、無線通信の方式をミリ波の無線通信方式からＬＣＸの無線通信方式に切り替えることを決定する。この場合においても、無線通信システム４００ａでは、実施の形態１のときと同様の効果を得ることができる。 As described above, according to the present embodiment, in the wireless communication system 400a, the route switching device 202a of the mobile communication system 220a is a plurality of millimeter wave antennas based on the analysis result acquired from the image analysis device 208. When the specified number of antennas out of 109 are counted, it is decided to switch the wireless communication system from the millimeter wave wireless communication system to the LCX wireless communication system. Even in this case, in the wireless communication system 400a, the same effect as in the first embodiment can be obtained.
実施の形態３．
　実施の形態１では、移動体通信システム２２０の経路切替装置２０２および地上通信システム１２０の経路切替装置１０２が、ともにミリ波の無線通信方式からＬＣＸの無線通信方式への切り替えの決定を行っていた。実施の形態３では、地上通信システムの経路切替装置のみがミリ波の無線通信方式からＬＣＸの無線通信方式への切り替えの決定を行う場合について説明する。 Embodiment 3.
In the first embodiment, the route switching device 202 of the mobile communication system 220 and the route switching device 102 of the terrestrial communication system 120 both determine the switching from the millimeter-wave wireless communication system to the LCX wireless communication system. .. In the third embodiment, a case where only the route switching device of the terrestrial communication system determines the switching from the millimeter-wave wireless communication system to the LCX wireless communication system will be described.
　図１０は、実施の形態３に係る無線通信システム４００ｂの構成例を示す図である。無線通信システム４００ｂは、地上通信システム１２０ｂと、移動体通信システム２２０と、を備える。地上通信システム１２０ｂは、地上に設置され、列車２３０に搭載される移動体通信システム２２０と無線通信を行うシステムである。地上通信システム１２０ｂは、図１に示す実施の形態１の地上通信システム１２０に対して、経路切替装置１０２およびミリ波通信システム１１１を、経路切替装置１０２ｂおよびミリ波通信システム１１１ｂに置き換えたものである。ミリ波通信システム１１１ｂは、図１に示す実施の形態１のミリ波通信システム１１１にカメラ１１２および画像解析装置１１３を追加したものである。 FIG. 10 is a diagram showing a configuration example of the wireless communication system 400b according to the third embodiment. The wireless communication system 400b includes a terrestrial communication system 120b and a mobile communication system 220. The terrestrial communication system 120b is a system installed on the ground and performing wireless communication with the mobile communication system 220 mounted on the train 230. The terrestrial communication system 120b replaces the route switching device 102 and the millimeter wave communication system 111 with the route switching device 102b and the millimeter wave communication system 111b with respect to the terrestrial communication system 120 of the first embodiment shown in FIG. is there. The millimeter-wave communication system 111b is obtained by adding a camera 112 and an image analysis device 113 to the millimeter-wave communication system 111 of the first embodiment shown in FIG.
　カメラ１１２は、列車２３０が移動する経路を撮影し、列車２３０の位置を監視する撮影部である。カメラ１１２は、撮影によって得られた画像情報を画像解析装置１１３に出力する。画像解析装置１１３は、カメラ１１２から画像情報を取得する。画像解析装置１１３は、カメラ１１２から取得した画像情報を解析し、解析結果を経路切替装置１０２ｂに出力する。 The camera 112 is a photographing unit that photographs the route on which the train 230 moves and monitors the position of the train 230. The camera 112 outputs the image information obtained by shooting to the image analysis device 113. The image analysis device 113 acquires image information from the camera 112. The image analysis device 113 analyzes the image information acquired from the camera 112, and outputs the analysis result to the route switching device 102b.
　図１１は、実施の形態３に係る地上通信システム１２０ｂが備える経路切替装置１０２ｂの構成例を示すブロック図である。経路切替装置１０２ｂは、有線ネットワークインターフェース部５００と、経路切替部５０１ｂと、ＬＣＸネットワークインターフェース部５０４と、ミリ波ネットワークインターフェース部５０５と、を備える。経路切替部５０１ｂは、有線ネットワークインターフェース部５００から出力されたデータであって、通信相手である移動体通信システム２２０に送信するデータを、ＬＣＸネットワークインターフェース部５０４またはミリ波ネットワークインターフェース部５０５に出力するかを決定する。 FIG. 11 is a block diagram showing a configuration example of the route switching device 102b included in the terrestrial communication system 120b according to the third embodiment. The route switching device 102b includes a wired network interface unit 500, a route switching unit 501b, an LCX network interface unit 504, and a millimeter wave network interface unit 505. The route switching unit 501b outputs the data output from the wired network interface unit 500 to the mobile communication system 220, which is the communication partner, to the LCX network interface unit 504 or the millimeter-wave network interface unit 505. To decide.
　経路切替部５０１ｂは、画像解析装置１１３から取得した解析結果に基づいて、通信相手に送信するデータをＬＣＸネットワークインターフェース部５０４またはミリ波ネットワークインターフェース部５０５に出力するかを決定する。例えば、経路切替部５０１ｂは、列車２３０が地上に設置される複数のミリ波アンテナ１０９ａ～１０９ｅのうち規定されたミリ波アンテナ１０９との距離が規定された距離になった場合、移動体通信システム２２０と地上通信システム１２０ｂとの間の無線通信の方式を、ミリ波の無線通信方式からＬＣＸの無線通信方式に切り替えることを決定する。 The route switching unit 501b determines whether to output the data to be transmitted to the communication partner to the LCX network interface unit 504 or the millimeter wave network interface unit 505 based on the analysis result acquired from the image analysis device 113. For example, the route switching unit 501b is a mobile communication system when the distance between the train 230 and the specified millimeter-wave antenna 109 among the plurality of millimeter-wave antennas 109a to 109e installed on the ground becomes a specified distance. It is decided to switch the wireless communication system between the 220 and the terrestrial communication system 120b from the millimeter wave wireless communication system to the LCX wireless communication system.
　具体的には、経路切替部５０１ｂは、列車２３０の移動速度が規定された移動速度閾値未満の場合は列車２３０の移動速度が低速として、ミリ波セル１１０のセル端、すなわち列車２３０がミリ波アンテナ１０９ａとの距離が規定された距離になったとき、ミリ波の無線通信方式からＬＣＸの無線通信方式に切り替えることを決定する。すなわち、経路切替部５０１ｂは、列車２３０がミリ波アンテナ１０９ａの位置であるミリ波セル１１０のセル端から規定された距離の位置に到達したとき、ミリ波の無線通信方式からＬＣＸの無線通信方式に切り替えることを決定する。また、経路切替部５０１ｂは、列車２３０の移動速度が規定された移動速度閾値以上の場合は列車２３０の移動速度が高速として、ミリ波セル１１０のセル端に対して余裕を持って、列車２３０がミリ波アンテナ１０９ｂとの距離が規定された距離になったとき、ミリ波の無線通信方式からＬＣＸの無線通信方式に切り替えることを決定する。すなわち、経路切替部５０１ｂは、ミリ波セル１１０のセル端に対して余裕を持って、ミリ波の無線通信方式からＬＣＸの無線通信方式に切り替えることを決定する。 Specifically, when the moving speed of the train 230 is less than the specified moving speed threshold, the route switching unit 501b assumes that the moving speed of the train 230 is low, and the cell end of the millimeter wave cell 110, that is, the train 230 is a millimeter wave. When the distance to the antenna 109a reaches the specified distance, it is decided to switch from the millimeter wave wireless communication system to the LCX wireless communication system. That is, when the train 230 reaches the position of the specified distance from the cell end of the millimeter wave cell 110, which is the position of the millimeter wave antenna 109a, the route switching unit 501b changes from the millimeter wave wireless communication method to the LCX wireless communication method. Decide to switch to. Further, the route switching unit 501b considers that the moving speed of the train 230 is high when the moving speed of the train 230 is equal to or higher than the specified moving speed threshold, and has a margin with respect to the cell end of the millimeter wave cell 110. Determines to switch from the millimeter-wave wireless communication system to the LCX wireless communication system when the distance from the millimeter-wave antenna 109b reaches a specified distance. That is, the route switching unit 501b determines to switch from the millimeter wave wireless communication system to the LCX wireless communication system with a margin with respect to the cell end of the millimeter wave cell 110.
　なお、移動体通信システム２２０が備える経路切替装置２０２については、実施の形態１と同様の構成であってもよいし、同様の構成である図２に示す経路切替装置１０２の経路切替部５０１を、記憶部５０２およびタイマ５０３を削除した経路切替部に置き換えてもよい。 The route switching device 202 included in the mobile communication system 220 may have the same configuration as that of the first embodiment, or the route switching unit 501 of the route switching device 102 shown in FIG. 2 having the same configuration. , The storage unit 502 and the timer 503 may be replaced with the deleted route switching unit.
　つづいて、無線通信システム４００ｂにおける地上通信システム１２０ｂの経路切替装置１０２ｂが無線通信方式を切り替える、すなわちデータの経路を切り替える動作について説明する。図１２は、実施の形態３に係る無線通信システム４００ｂにおける地上通信システム１２０ｂの経路切替装置１０２ｂの経路切替動作を示すシーケンス図である。図１２では、具体的に、地上通信システム１２０ｂの既存アプリサーバ１００から移動体通信システム２２０の既存アプリ端末２００にデータを送信する際の経路切替動作について説明する。なお、ステップＳ３０１からステップＳ３０８までは、図４に示す実施の形態１のときのシーケンス図のステップＳ１０１からステップＳ１０８と同様のため説明を省略する。 Next, an operation in which the route switching device 102b of the terrestrial communication system 120b in the wireless communication system 400b switches the wireless communication method, that is, the operation of switching the data path will be described. FIG. 12 is a sequence diagram showing a route switching operation of the route switching device 102b of the terrestrial communication system 120b in the wireless communication system 400b according to the third embodiment. Specifically, FIG. 12 describes a route switching operation when data is transmitted from the existing application server 100 of the terrestrial communication system 120b to the existing application terminal 200 of the mobile communication system 220. Since steps S301 to S308 are the same as steps S101 to S108 in the sequence diagram of the first embodiment shown in FIG. 4, the description thereof will be omitted.
　ミリ波制御装置１０７は、ステップＳ３０６で経路情報通知を送信すると、画像解析装置１１３に対して、画像解析開始通知を送信する（ステップＳ３０９）。画像解析開始通知を受信した画像解析装置１１３は、カメラ１１２から取得した画像情報の解析を開始する（ステップＳ３１０）。画像解析装置１１３は、画像情報を解析した解析結果を経路切替装置１０２ｂに送信する（ステップＳ３１１）。 When the millimeter wave control device 107 transmits the route information notification in step S306, the millimeter wave control device 107 transmits an image analysis start notification to the image analysis device 113 (step S309). The image analysis device 113 that has received the image analysis start notification starts the analysis of the image information acquired from the camera 112 (step S310). The image analysis device 113 transmits the analysis result of analyzing the image information to the route switching device 102b (step S311).
　経路切替装置１０２ｂの経路切替部５０１ｂは、前述のように、列車２３０が地上に設置される複数のミリ波アンテナ１０９ａ～１０９ｅのうち規定されたミリ波アンテナ１０９との距離が規定された距離の位置に到達した場合（ステップＳ３１２）、列車２３０がミリ波通信システム１１１ｂ経由での通信が不可になると判断する。経路切替装置１０２ｂの経路切替部５０１ｂは、移動体通信システム２２０と地上通信システム１２０ｂとの間の無線通信の方式を、ミリ波の無線通信方式からＬＣＸの無線通信方式に切り替えることを決定する。経路切替装置１０２ｂの経路切替部５０１ｂは、経路切替装置２０２にミリ波通信システム１１１ｂを用いて経路情報通知を送信する（ステップＳ３１３）。経路切替装置１０２ｂの経路切替部５０１ｂは、ＬＣＸ通信システム１０６経由での通信に経路を切り替える（ステップＳ３１４）。 As described above, the route switching unit 501b of the route switching device 102b has a distance to the specified millimeter wave antenna 109 among the plurality of millimeter wave antennas 109a to 109e on which the train 230 is installed on the ground. When the position is reached (step S312), it is determined that the train 230 cannot communicate via the millimeter-wave communication system 111b. The route switching unit 501b of the route switching device 102b determines to switch the wireless communication system between the mobile communication system 220 and the terrestrial communication system 120b from the millimeter wave wireless communication system to the LCX wireless communication system. The route switching unit 501b of the route switching device 102b transmits a route information notification to the route switching device 202 using the millimeter-wave communication system 111b (step S313). The route switching unit 501b of the route switching device 102b switches the route to communication via the LCX communication system 106 (step S314).
　ステップＳ３１３において経路情報通知を受信した経路切替装置２０２は、列車２３０がミリ波通信システム１１１ｂ経由での通信が不可になると判断し、ＬＣＸ通信システム１０６経由での通信に経路を切り替える（ステップＳ３１５）。 The route switching device 202 that received the route information notification in step S313 determines that the train 230 cannot communicate via the millimeter-wave communication system 111b, and switches the route to communication via the LCX communication system 106 (step S315). ..
　これにより、無線通信システム４００ｂにおいて、既存アプリサーバ１００および既存アプリ端末２００は、図１２に示すように、経路切替装置１０２ｂ、ＬＣＸ制御装置１０３、ＬＣＸ基地局１０４、ＬＣＸ移動局２０３、および経路切替装置２０２を経由して通信を行うことができる（ステップＳ３１６）。 As a result, in the wireless communication system 400b, the existing application server 100 and the existing application terminal 200 have the route switching device 102b, the LCX control device 103, the LCX base station 104, the LCX mobile station 203, and the route switching, as shown in FIG. Communication can be performed via the device 202 (step S316).
　なお、本実施の形態では、画像解析装置１１３は、ミリ波制御装置１０７から画像解析開始通知を受信することで画像解析を開始しているが、これに限定されない。画像解析装置１１３は、ミリ波制御装置１０７から画像解析開始通知を受信しなくても常に画像解析を実施するようにしてもよい。 In the present embodiment, the image analysis device 113 starts the image analysis by receiving the image analysis start notification from the millimeter wave control device 107, but the present invention is not limited to this. The image analysis device 113 may always perform image analysis without receiving the image analysis start notification from the millimeter wave control device 107.
　また、経路切替装置１０２ｂの経路切替部５０１ｂは、ミリ波通信システム１１１ｂを用いて経路切替装置２０２に経路情報通知を送信していたが、ＬＣＸ通信システム１０６を用いて経路切替装置２０２に経路情報通知を送信してもよい。 Further, the route switching unit 501b of the route switching device 102b transmitted the route information notification to the route switching device 202 using the millimeter wave communication system 111b, but the route information to the route switching device 202 using the LCX communication system 106. Notifications may be sent.
　また、画像解析装置１１３については、経路切替装置１０２ｂが備えてもよい。また、経路切替部５０１ｂが、画像解析装置１１３の機能を持つようにしてもよい。 Further, the image analysis device 113 may be provided with the route switching device 102b. Further, the route switching unit 501b may have the function of the image analysis device 113.
　実施の形態３において、無線通信システム４００ｂは、地上通信システム１２０ｂが、データの転送先を切り替える経路切替装置１０２ｂを備えるシステムである。 In the third embodiment, the wireless communication system 400b is a system in which the terrestrial communication system 120b includes a route switching device 102b for switching the data transfer destination.
　以上説明したように、本実施の形態によれば、無線通信システム４００ｂにおいて、地上通信システム１２０ｂの経路切替装置１０２ｂは、画像解析装置１１３から取得した解析結果に基づいて、列車２３０と複数のミリ波アンテナ１０９のうち規定された位置のミリ波アンテナ１０９との距離が規定された距離になった場合、無線通信の方式をミリ波の無線通信方式からＬＣＸの無線通信方式に切り替えることを決定する。この場合においても、無線通信システム４００ｂでは、実施の形態１のときと同様の効果を得ることができる。 As described above, according to the present embodiment, in the wireless communication system 400b, the route switching device 102b of the ground communication system 120b is the train 230 and a plurality of millimeters based on the analysis result acquired from the image analysis device 113. When the distance from the millimeter wave antenna 109 at the specified position of the wave antenna 109 reaches the specified distance, it is decided to switch the wireless communication method from the millimeter wave wireless communication system to the LCX wireless communication system. .. Even in this case, in the wireless communication system 400b, the same effect as in the first embodiment can be obtained.
実施の形態４．
　実施の形態１では、移動体通信システム２２０の経路切替装置２０２および地上通信システム１２０の経路切替装置１０２が、ともにミリ波の無線通信方式からＬＣＸの無線通信方式への切り替えの決定を行っていた。実施の形態４では、移動体通信システムの経路切替装置のみがミリ波の無線通信方式からＬＣＸの無線通信方式への切り替えの決定を行う、実施の形態２とは異なる場合について説明する。 Embodiment 4.
In the first embodiment, the route switching device 202 of the mobile communication system 220 and the route switching device 102 of the terrestrial communication system 120 both determine the switching from the millimeter-wave wireless communication system to the LCX wireless communication system. .. The fourth embodiment describes a case different from the second embodiment in which only the route switching device of the mobile communication system determines the switching from the millimeter-wave wireless communication system to the LCX wireless communication system.
　図１３は、実施の形態４に係る無線通信システム４００ｃの構成例を示す図である。無線通信システム４００ｃは、地上通信システム１２０と、移動体通信システム２２０ｃと、を備える。移動体通信システム２２０ｃは、列車２３０ｃに搭載され、地上に設置される地上通信システム１２０と無線通信を行うシステムである。移動体通信システム２２０ｃは、図１に示す実施の形態１の移動体通信システム２２０に対して、経路切替装置２０２を経路切替装置２０２ｃに置き換え、さらに、受信電力解析装置２０９を追加したものである。 FIG. 13 is a diagram showing a configuration example of the wireless communication system 400c according to the fourth embodiment. The wireless communication system 400c includes a terrestrial communication system 120 and a mobile communication system 220c. The mobile communication system 220c is a system mounted on the train 230c and wirelessly communicates with the ground communication system 120 installed on the ground. The mobile communication system 220c is obtained by replacing the route switching device 202 with the route switching device 202c and further adding the received power analysis device 209 to the mobile communication system 220 of the first embodiment shown in FIG. ..
　受信電力解析装置２０９は、地上通信システム１２０から送信されたデータが、ミリ波アンテナ２０６を介してミリ波移動局２０５で受信されたときの受信電力を示す受信電力情報を解析する。受信電力解析装置２０９は、解析結果を経路切替装置２０２ｃに出力する。なお、ミリ波移動局２０５は、受信電力情報を受信電力解析装置２０９に送信しているものとする。 The received power analysis device 209 analyzes the received power information indicating the received power when the data transmitted from the terrestrial communication system 120 is received by the millimeter wave mobile station 205 via the millimeter wave antenna 206. The received power analysis device 209 outputs the analysis result to the route switching device 202c. It is assumed that the millimeter wave mobile station 205 transmits the received power information to the received power analysis device 209.
　図１４は、実施の形態４に係る移動体通信システム２２０ｃが備える受信電力解析装置２０９による受信電力情報の解析結果の例を示す図である。図１４において、横軸は時間を示し、縦軸は受信電力を示す。図１４は、列車２３０ｃがミリ波セル１１０に在線してから非在線になるまでの間において、ミリ波移動局２０５がデータを受信したときの受信電力情報を時系列にグラフ化したものである。図１４に示すピークＡ～Ｅは、それぞれ、列車２３０ｃがミリ波アンテナ１０９ａ～１０９ｅの付近でデータを受信したときの受信電力である。図１３に示すように、地上通信システム１２０は、５本のミリ波アンテナ１０９ａ～１０９ｅを備えている。また、ミリ波アンテナ１０９ａ～１０９ｅの指向性は、図１３に示すように、列車２３０ｃの進行方向とは逆方向、図１３の例では右方向である。 FIG. 14 is a diagram showing an example of the analysis result of the received power information by the received power analysis device 209 included in the mobile communication system 220c according to the fourth embodiment. In FIG. 14, the horizontal axis represents time and the vertical axis represents received power. FIG. 14 is a time-series graph of the received power information when the millimeter-wave mobile station 205 receives data from the time when the train 230c is on the millimeter-wave cell 110 to the time when it is not on the line. .. The peaks A to E shown in FIG. 14 are the received powers when the train 230c receives data in the vicinity of the millimeter wave antennas 109a to 109e, respectively. As shown in FIG. 13, the terrestrial communication system 120 includes five millimeter-wave antennas 109a to 109e. Further, as shown in FIG. 13, the directivity of the millimeter wave antennas 109a to 109e is opposite to the traveling direction of the train 230c, and in the example of FIG. 13, it is in the right direction.
　列車２３０ｃでは、ミリ波への在線登録が終わると、ミリ波移動局２０５における受信電力は、図１４に示す通りある一定値以上となっている。そして、列車２３０ｃがミリ波アンテナ１０９ｅに近づくにつれて、ミリ波移動局２０５の受信電力は大きくなる。列車２３０ｃが進行方向に進み、列車２３０ｃがミリ波アンテナ１０９ｅの通信エリアを通過した直後に、ピークＥで示す通り急激にミリ波移動局２０５の受信電力は低下する。しかしながら、列車２３０ｃはミリ波アンテナ１０９ｄの通信エリアに入るため、ミリ波移動局２０５では一定値以上の受信電力を保持するとともに、列車２３０ｃが進行方向に進み、ミリ波アンテナ１０９ｄに近づくにつれて、ミリ波移動局２０５の受信電力は大きくなる。このように、列車２３０ｃがミリ波アンテナ１０９に近づくにつれてミリ波移動局２０５の受信電力が大きくなり、列車２３０ｃがミリ波アンテナ１０９を通過した直後に急激にミリ波移動局２０５の受信電力が低下する事象を受信電力変動とする。 In the train 230c, after the registration of the presence in the millimeter wave is completed, the received power in the millimeter wave mobile station 205 is equal to or higher than a certain value as shown in FIG. Then, as the train 230c approaches the millimeter-wave antenna 109e, the received power of the millimeter-wave mobile station 205 increases. Immediately after the train 230c advances in the traveling direction and the train 230c passes through the communication area of the millimeter wave antenna 109e, the received power of the millimeter wave mobile station 205 drops sharply as shown by the peak E. However, since the train 230c enters the communication area of the millimeter wave antenna 109d, the millimeter wave mobile station 205 maintains the received power above a certain value, and as the train 230c advances in the traveling direction and approaches the millimeter wave antenna 109d, the millimeter wave antenna 109d is approached. The received power of the wave mobile station 205 becomes large. In this way, as the train 230c approaches the millimeter wave antenna 109, the received power of the millimeter wave mobile station 205 increases, and immediately after the train 230c passes through the millimeter wave antenna 109, the received power of the millimeter wave mobile station 205 drops sharply. The event to be performed is defined as the received power fluctuation.
　図１５は、実施の形態４に係る移動体通信システム２２０ｃが備える経路切替装置２０２ｃの構成例を示すブロック図である。経路切替装置２０２ｃは、有線ネットワークインターフェース部５００と、経路切替部５０１ｃと、ＬＣＸネットワークインターフェース部５０４と、ミリ波ネットワークインターフェース部５０５と、を備える。経路切替部５０１ｃは、有線ネットワークインターフェース部５００から出力されたデータであって、通信相手である地上通信システム１２０に送信するデータを、ＬＣＸネットワークインターフェース部５０４またはミリ波ネットワークインターフェース部５０５に出力するかを決定する。 FIG. 15 is a block diagram showing a configuration example of the route switching device 202c included in the mobile communication system 220c according to the fourth embodiment. The route switching device 202c includes a wired network interface unit 500, a route switching unit 501c, an LCX network interface unit 504, and a millimeter wave network interface unit 505. Whether the route switching unit 501c outputs the data output from the wired network interface unit 500 to the terrestrial communication system 120, which is the communication partner, to the LCX network interface unit 504 or the millimeter-wave network interface unit 505. To determine.
　経路切替部５０１ｃは、受信電力解析装置２０９から取得した解析結果に基づいて、通信相手に送信するデータをＬＣＸネットワークインターフェース部５０４またはミリ波ネットワークインターフェース部５０５に出力するかを決定する。例えば、経路切替部５０１ｃは、地上に設置される複数のミリ波アンテナ１０９ａ～１０９ｅのうち列車２３０ｃが規定された数のミリ波アンテナ１０９を通過した場合、移動体通信システム２２０ｃと地上通信システム１２０との間の無線通信の方式を、ミリ波の無線通信方式からＬＣＸの無線通信方式に切り替えることを決定する。受信電力解析装置２０９から得られる解析結果は、図１４に示すように、列車２３０ｃがミリ波アンテナ１０９を通過するときに大きく変動する。そのため、経路切替部５０１ｃは、受信電力変動の数をカウントすることで、列車２３０ｃの位置を推定することができる。 The route switching unit 501c determines whether to output the data to be transmitted to the communication partner to the LCX network interface unit 504 or the millimeter wave network interface unit 505 based on the analysis result acquired from the received power analysis device 209. For example, when the train 230c passes through the specified number of millimeter-wave antennas 109 among the plurality of millimeter-wave antennas 109a to 109e installed on the ground, the route switching unit 501c has the mobile communication system 220c and the ground communication system 120. It is decided to switch the wireless communication system between the two and the millimeter wave wireless communication system to the LCX wireless communication system. As shown in FIG. 14, the analysis result obtained from the received power analysis device 209 fluctuates greatly when the train 230c passes through the millimeter wave antenna 109. Therefore, the route switching section 501c can estimate the position of the train 230c by counting the number of received power fluctuations.
　具体的には、経路切替部５０１ｃは、列車２３０ｃの移動速度が規定された移動速度閾値未満の場合は列車２３０ｃの移動速度が低速として、ミリ波アンテナ１０９ｅから開始して５本目のミリ波アンテナ１０９ａを通過したとき、ミリ波の無線通信方式からＬＣＸの無線通信方式に切り替えることを決定する。すなわち、経路切替部５０１ｃは、列車２３０ｃがミリ波アンテナ１０９ａの位置であるミリ波セル１１０のセル端に到達したとき、ミリ波の無線通信方式からＬＣＸの無線通信方式に切り替えることを決定する。また、経路切替部５０１ｃは、列車２３０ｃの移動速度が規定された移動速度閾値以上の場合は列車２３０ｃの移動速度が高速として、ミリ波アンテナ１０９ｅから開始して４本目のミリ波アンテナ１０９ｂを通過したとき、ミリ波の無線通信方式からＬＣＸの無線通信方式に切り替えることを決定する。すなわち、経路切替部５０１ｃは、ミリ波セル１１０のセル端に対して余裕を持って、ミリ波の無線通信方式からＬＣＸの無線通信方式に切り替えることを決定する。 Specifically, the route switching unit 501c considers that the moving speed of the train 230c is low when the moving speed of the train 230c is less than the specified moving speed threshold, and starts from the millimeter wave antenna 109e and is the fifth millimeter wave antenna. When passing through 109a, it is decided to switch from the millimeter wave wireless communication system to the LCX wireless communication system. That is, the route switching section 501c determines that when the train 230c reaches the cell end of the millimeter wave cell 110, which is the position of the millimeter wave antenna 109a, the millimeter wave wireless communication system is switched to the LCX wireless communication system. Further, when the moving speed of the train 230c is equal to or higher than the specified moving speed threshold, the route switching unit 501c assumes that the moving speed of the train 230c is high, starts from the millimeter wave antenna 109e, and passes through the fourth millimeter wave antenna 109b. At that time, it is decided to switch from the millimeter wave wireless communication system to the LCX wireless communication system. That is, the path switching section 501c determines to switch from the millimeter-wave wireless communication system to the LCX wireless communication system with a margin with respect to the cell end of the millimeter-wave cell 110.
　なお、地上通信システム１２０が備える経路切替装置１０２については、実施の形態１と同様の構成であってもよいし、図２に示す経路切替装置１０２の経路切替部５０１を、記憶部５０２およびタイマ５０３を削除した経路切替部に置き換えてもよい。 The route switching device 102 included in the terrestrial communication system 120 may have the same configuration as that of the first embodiment, and the route switching unit 501 of the route switching device 102 shown in FIG. 2 may be a storage unit 502 and a timer. 503 may be replaced with the deleted route switching unit.
　つづいて、無線通信システム４００ｃにおける移動体通信システム２２０ｃの経路切替装置２０２ｃが無線通信方式を切り替える、すなわちデータの経路を切り替える動作について説明する。図１６は、実施の形態４に係る無線通信システム４００ｃにおける移動体通信システム２２０ｃの経路切替装置２０２ｃの経路切替動作を示すシーケンス図である。図１６では、具体的に、地上通信システム１２０の既存アプリサーバ１００から移動体通信システム２２０ｃの既存アプリ端末２００にデータを送信する際の経路切替動作について説明する。なお、ステップＳ４０１からステップＳ４０８までは、図４に示す実施の形態１のときのシーケンス図のステップＳ１０１からステップＳ１０８と同様のため説明を省略する。 Next, an operation in which the route switching device 202c of the mobile communication system 220c in the wireless communication system 400c switches the wireless communication method, that is, the operation of switching the data path will be described. FIG. 16 is a sequence diagram showing a route switching operation of the route switching device 202c of the mobile communication system 220c in the wireless communication system 400c according to the fourth embodiment. FIG. 16 specifically describes a route switching operation when data is transmitted from the existing application server 100 of the terrestrial communication system 120 to the existing application terminal 200 of the mobile communication system 220c. Since steps S401 to S408 are the same as steps S101 to S108 in the sequence diagram of the first embodiment shown in FIG. 4, the description thereof will be omitted.
　ミリ波移動局２０５は、ステップＳ４０７で経路情報通知を送信すると、受信電力解析装置２０９に対して、受信電力解析開始通知を送信する（ステップＳ４０９）。受信電力解析開始通知を受信した受信電力解析装置２０９は、ミリ波移動局２０５から取得した受信電力情報の解析を開始する（ステップＳ４１０）。受信電力解析装置２０９は、受信電力情報を解析した解析結果を経路切替装置２０２ｃに送信する（ステップＳ４１１）。 When the millimeter wave mobile station 205 transmits the route information notification in step S407, the millimeter wave mobile station 205 transmits the received power analysis start notification to the received power analysis device 209 (step S409). Upon receiving the reception power analysis start notification, the reception power analysis device 209 starts analysis of the reception power information acquired from the millimeter wave mobile station 205 (step S410). The received power analysis device 209 transmits the analysis result of analyzing the received power information to the route switching device 202c (step S411).
　経路切替装置２０２ｃの経路切替部５０１ｃは、前述のように、列車２３０ｃが規定された数のミリ波アンテナ１０９を通過した場合（ステップＳ４１２）、列車２３０ｃがミリ波通信システム１１１経由での通信が不可になると判断する。経路切替装置２０２ｃの経路切替部５０１ｃは、移動体通信システム２２０ｃと地上通信システム１２０との間の無線通信の方式を、ミリ波の無線通信方式からＬＣＸの無線通信方式に切り替えることを決定する。経路切替装置２０２ｃの経路切替部５０１ｃは、経路切替装置１０２にミリ波通信システム１１１を用いて経路情報通知を送信する（ステップＳ４１３）。経路切替装置２０２ｃの経路切替部５０１ｃは、ＬＣＸ通信システム１０６経由での通信に経路を切り替える（ステップＳ４１４）。 As described above, when the train 230c passes through the specified number of millimeter-wave antennas 109 (step S412), the route switching unit 501c of the route switching device 202c communicates with the train 230c via the millimeter-wave communication system 111. Judge that it will be impossible. The route switching unit 501c of the route switching device 202c determines to switch the wireless communication system between the mobile communication system 220c and the terrestrial communication system 120 from the millimeter wave wireless communication system to the LCX wireless communication system. The route switching unit 501c of the route switching device 202c transmits a route information notification to the route switching device 102 using the millimeter-wave communication system 111 (step S413). The route switching unit 501c of the route switching device 202c switches the route to communication via the LCX communication system 106 (step S414).
　ステップＳ４１３において経路情報通知を受信した経路切替装置１０２は、列車２３０ｃがミリ波通信システム１１１経由での通信が不可になると判断し、ＬＣＸ通信システム１０６経由での通信に経路を切り替える（ステップＳ４１５）。 The route switching device 102 that received the route information notification in step S413 determines that the train 230c cannot communicate via the millimeter-wave communication system 111, and switches the route to communication via the LCX communication system 106 (step S415). ..
　これにより、無線通信システム４００ｃにおいて、既存アプリサーバ１００および既存アプリ端末２００は、図１６に示すように、経路切替装置１０２、ＬＣＸ制御装置１０３、ＬＣＸ基地局１０４、ＬＣＸ移動局２０３、および経路切替装置２０２ｃを経由して通信を行うことができる（ステップＳ４１６）。 As a result, in the wireless communication system 400c, the existing application server 100 and the existing application terminal 200 have the route switching device 102, the LCX control device 103, the LCX base station 104, the LCX mobile station 203, and the route switching, as shown in FIG. Communication can be performed via the device 202c (step S416).
　なお、本実施の形態では、受信電力解析装置２０９は、ミリ波移動局２０５から受信電力解析開始通知を受信することで受信電力解析を開始しているが、これに限定されない。受信電力解析装置２０９は、ミリ波移動局２０５から受信電力解析開始通知を受信しなくても常に受信電力解析を実施するようにしてもよい。 In the present embodiment, the received power analysis device 209 starts the received power analysis by receiving the received power analysis start notification from the millimeter wave mobile station 205, but the present invention is not limited to this. The received power analysis device 209 may always perform the received power analysis even if the received power analysis start notification is not received from the millimeter wave mobile station 205.
　また、本実施の形態では、ミリ波移動局２０５と受信電力解析装置２０９とを分離しているが、受信電力解析装置２０９の機能をミリ波移動局２０５に持たせてもよい。 Further, in the present embodiment, the millimeter wave mobile station 205 and the received power analysis device 209 are separated, but the millimeter wave mobile station 205 may have the function of the received power analysis device 209.
　また、経路切替装置２０２ｃの経路切替部５０１ｃは、ミリ波通信システム１１１を用いて経路切替装置１０２に経路情報通知を送信していたが、ＬＣＸ通信システム１０６を用いて経路切替装置１０２に経路情報通知を送信してもよい。 Further, the route switching unit 501c of the route switching device 202c used the millimeter-wave communication system 111 to transmit the route information notification to the route switching device 102, but the LCX communication system 106 was used to send the route information to the route switching device 102. Notifications may be sent.
　また、受信電力解析装置２０９については、経路切替装置２０２ｃが備えてもよい。また、経路切替部５０１ｃが、受信電力解析装置２０９の機能を持つようにしてもよい。 Further, the received power analysis device 209 may be provided by the route switching device 202c. Further, the route switching unit 501c may have the function of the received power analysis device 209.
　実施の形態４において、無線通信システム４００ｃは、移動体通信システム２２０ｃが、データの転送先を切り替える経路切替装置２０２ｃを備えるシステムである。 In the fourth embodiment, the wireless communication system 400c is a system in which the mobile communication system 220c includes a route switching device 202c for switching the data transfer destination.
　以上説明したように、本実施の形態によれば、無線通信システム４００ｃにおいて、移動体通信システム２２０ｃの経路切替装置２０２ｃは、受信電力解析装置２０９から取得した解析結果に基づいて、列車２３０ｃが複数のミリ波アンテナ１０９のうち規定された数のミリ波アンテナ１０９を通過した場合、無線通信の方式をミリ波の無線通信方式からＬＣＸの無線通信方式に切り替えることを決定する。この場合においても、無線通信システム４００ｃでは、実施の形態１のときと同様の効果を得ることができる。 As described above, according to the present embodiment, in the wireless communication system 400c, the route switching device 202c of the mobile communication system 220c has a plurality of trains 230c based on the analysis result acquired from the received power analysis device 209. When a specified number of millimeter-wave antennas 109 are passed through the millimeter-wave antennas 109, it is determined to switch the wireless communication method from the millimeter-wave wireless communication method to the LCX wireless communication method. Even in this case, in the wireless communication system 400c, the same effect as in the first embodiment can be obtained.
　以上の実施の形態に示した構成は、本発明の内容の一例を示すものであり、別の公知の技術と組み合わせることも可能であるし、本発明の要旨を逸脱しない範囲で、構成の一部を省略、変更することも可能である。 The configuration shown in the above-described embodiment shows an example of the content of the present invention, can be combined with another known technique, and is one of the configurations without departing from the gist of the present invention. It is also possible to omit or change the part.
　１００　既存アプリサーバ、１０１　新規アプリサーバ、１０２，１０２ｂ，２０２，２０２ａ，２０２ｃ　経路切替装置、１０３　ＬＣＸ制御装置、１０４　ＬＣＸ基地局、１０５，２０４　ＬＣＸアンテナ、１０６　ＬＣＸ通信システム、１０７　ミリ波制御装置、１０８　ミリ波基地局、１０９ａ～１０９ｅ，２０６　ミリ波アンテナ、１１０　ミリ波セル、１１１，１１１ｂ　ミリ波通信システム、１１２，２０７　カメラ、１１３，２０８　画像解析装置、１２０，１２０ｂ　地上通信システム、２００　既存アプリ端末、２０１　新規アプリ端末、２０３　ＬＣＸ移動局、２０５　ミリ波移動局、２０９　受信電力解析装置、２２０，２２０ａ，２２０ｃ　移動体通信システム、２３０，２３０ａ，２３０ｃ　列車、３００　レール、４００，４００ａ，４００ｂ，４００ｃ　無線通信システム、５００　有線ネットワークインターフェース部、５０１，５０１ａ，５０１ｂ，５０１ｃ　経路切替部、５０２　記憶部、５０３　タイマ、５０４　ＬＣＸネットワークインターフェース部、５０５　ミリ波ネットワークインターフェース部。 100 existing application server, 101 new application server, 102, 102b, 202, 202a, 202c route switching device, 103 LCX control device, 104 LCX base station, 105, 204 LCX antenna, 106 LCX communication system, 107 millimeter wave control device, 108 millimeter-wave base station, 109a-109e, 206 millimeter-wave antenna, 110 millimeter-wave cell, 111,111b millimeter-wave communication system, 112,207 camera, 113,208 image analyzer, 120,120b terrestrial communication system, 200 existing application Terminal, 201 new application terminal, 203 LCX mobile station, 205 millimeter wave mobile station, 209 received power analyzer, 220, 220a, 220c mobile communication system, 230, 230a, 230c train, 300 rail, 400, 400a, 400b, 400c wireless communication system, 500 wired network interface unit, 501, 501a, 501b, 501c route switching unit, 502 storage unit, 503 timer, 504 LCX network antenna unit, 505 millimeter wave network interface unit.

Claims (9)

  1. 　規定された経路を移動する移動体に搭載される移動体通信システムと、地上に設置される地上通信システムとが、第１の無線通信方式、および前記第１の無線通信方式よりも伝送容量の大きい第２の無線通信方式で無線通信が可能な無線通信システムにおいて、前記移動体通信システムおよび前記地上通信システムのうち少なくとも一方が備える経路切替装置であって、
    　前記移動体通信システムおよび前記地上通信システムは、前記経路の全域である第１の通信エリアにおいて前記第１の無線通信方式で無線通信が可能であり、前記経路の一部である第２の通信エリアにおいて前記第２の無線通信方式で無線通信が可能であり、
    　前記経路切替装置は、
    　前記第１の無線通信方式で無線通信を行う無線通信装置と通信が可能な第１の通信部と、
    　前記第２の無線通信方式で無線通信を行う無線通信装置と通信が可能な第２の通信部と、
    　通信相手に送信するデータを前記第１の通信部または前記第２の通信部に出力するかを決定し、前記データを前記第１の通信部または前記第２の通信部に出力する経路切替部と、
    　を備えることを特徴とする経路切替装置。     The mobile communication system mounted on the mobile body moving on the specified route and the terrestrial communication system installed on the ground have a transmission capacity higher than that of the first wireless communication system and the first wireless communication system. A route switching device included in at least one of the mobile communication system and the terrestrial communication system in a wireless communication system capable of wireless communication by a large second wireless communication method.
    The mobile communication system and the terrestrial communication system are capable of wireless communication by the first wireless communication method in a first communication area which is the entire area of the path, and are a part of the path. Wireless communication is possible in the area by the second wireless communication method.
    The route switching device is
    A first communication unit capable of communicating with a wireless communication device that performs wireless communication by the first wireless communication method, and
    A second communication unit capable of communicating with a wireless communication device that performs wireless communication by the second wireless communication method, and
    A route switching unit that determines whether to output data to be transmitted to a communication partner to the first communication unit or the second communication unit, and outputs the data to the first communication unit or the second communication unit. When,
    A route switching device characterized by being provided with.
  2. 　前記移動体通信システムおよび前記地上通信システムが備える前記経路切替部は、
    　前記移動体の移動速度と、前記移動速度のときに前記移動体が前記第２の通信エリアを通過する時間である経路切替タイマ値との関係を、複数の移動速度について記憶する記憶部と、
    　前記移動体が前記第２の通信エリアにおいて前記第２の無線通信方式で無線通信を開始してからの経過時間をカウントするタイマと、
    　を備え、
    　前記タイマでカウントされた前記経過時間が前記経路切替タイマ値になった場合、無線通信の方式を前記第２の無線通信方式から前記第１の無線通信方式に切り替えることを決定する、
    　ことを特徴とする請求項１に記載の経路切替装置。     The route switching unit included in the mobile communication system and the terrestrial communication system is
    A storage unit that stores the relationship between the moving speed of the moving body and the route switching timer value, which is the time for the moving body to pass through the second communication area at the moving speed, for a plurality of moving speeds.
    A timer that counts the elapsed time since the mobile body started wireless communication in the second communication area by the second wireless communication method.
    With
    When the elapsed time counted by the timer reaches the route switching timer value, it is determined to switch the wireless communication method from the second wireless communication method to the first wireless communication method.
    The route switching device according to claim 1.
  3. 　前記地上通信システムは、前記第２の通信エリアにおいて、地上に設置され指向性を持たせた複数のアンテナを介して、前記移動体通信システムと前記第２の無線通信方式で無線通信が可能であり、
    　前記移動体通信システムは、前記移動体の進行方向または前記進行方向の逆方向を撮影する撮影部と、前記撮影部で撮影された画像を解析する画像解析装置と、を備え、
    　前記移動体通信システムが備える前記経路切替部は、
    　前記画像解析装置から取得した解析結果に基づいて、前記複数のアンテナのうち規定された数のアンテナをカウントした場合、無線通信の方式を前記第２の無線通信方式から前記第１の無線通信方式に切り替えることを決定する、
    　ことを特徴とする請求項１に記載の経路切替装置。     In the second communication area, the terrestrial communication system can perform wireless communication with the mobile communication system by the second wireless communication method via a plurality of antennas installed on the ground and provided with directivity. Yes,
    The mobile communication system includes a photographing unit that captures a moving direction of the moving body or a direction opposite to the traveling direction, and an image analysis device that analyzes an image captured by the photographing unit.
    The route switching unit included in the mobile communication system is
    When a predetermined number of antennas among the plurality of antennas are counted based on the analysis result acquired from the image analysis device, the wireless communication method is changed from the second wireless communication method to the first wireless communication method. Decide to switch to,
    The route switching device according to claim 1.
  4. 　前記地上通信システムは、前記第２の通信エリアにおいて、地上に設置され指向性を持たせた複数のアンテナを介して、前記移動体通信システムと前記第２の無線通信方式で無線通信が可能であり、
    　前記地上通信システムは、前記移動体の位置を監視する撮影部と、前記撮影部で撮影された画像を解析する画像解析装置と、を備え、
    　前記地上通信システムが備える前記経路切替部は、
    　前記画像解析装置から取得した解析結果に基づいて、前記移動体と前記複数のアンテナのうち規定された位置のアンテナとの距離が規定された距離になった場合、無線通信の方式を前記第２の無線通信方式から前記第１の無線通信方式に切り替えることを決定する、
    　ことを特徴とする請求項１に記載の経路切替装置。     In the second communication area, the terrestrial communication system can perform wireless communication with the mobile communication system by the second wireless communication method via a plurality of antennas installed on the ground and provided with directivity. Yes,
    The terrestrial communication system includes an imaging unit that monitors the position of the moving body and an image analysis device that analyzes an image captured by the imaging unit.
    The route switching unit included in the terrestrial communication system is
    Based on the analysis result acquired from the image analysis device, when the distance between the moving body and the antenna at the specified position among the plurality of antennas becomes the specified distance, the wireless communication method is referred to as the second method. Determines to switch from the wireless communication system of the above to the first wireless communication system.
    The route switching device according to claim 1.
  5. 　前記地上通信システムは、前記第２の通信エリアにおいて、地上に設置され指向性を持たせた複数のアンテナを介して、前記移動体通信システムと前記第２の無線通信方式で無線通信が可能であり、
    　前記移動体通信システムは、前記第２の無線通信方式によって受信されたデータの受信電力を解析する受信電力解析部、を備え、
    　前記移動体通信システムが備える前記経路切替部は、
    　前記受信電力解析部から取得した解析結果に基づいて、前記移動体が前記複数のアンテナのうち規定された数のアンテナを通過した場合、無線通信の方式を前記第２の無線通信方式から前記第１の無線通信方式に切り替えることを決定する、
    　ことを特徴とする請求項１に記載の経路切替装置。     In the second communication area, the terrestrial communication system can perform wireless communication with the mobile communication system by the second wireless communication method via a plurality of antennas installed on the ground and provided with directivity. Yes,
    The mobile communication system includes a reception power analysis unit that analyzes the reception power of data received by the second wireless communication method.
    The route switching unit included in the mobile communication system is
    Based on the analysis result acquired from the received power analysis unit, when the mobile body passes through a specified number of antennas among the plurality of antennas, the wireless communication method is changed from the second wireless communication method to the first. Decide to switch to 1 wireless communication method,
    The route switching device according to claim 1.
  6. 　請求項２に記載の経路切替装置を備える移動体通信システムと、
    　請求項２に記載の経路切替装置を備える地上通信システムと、
    　を備え、
    　前記移動体通信システムは、前記移動体の前記移動速度を前記地上通信システムに通知する、
    　ことを特徴とする無線通信システム。     A mobile communication system including the route switching device according to claim 2,
    A terrestrial communication system including the route switching device according to claim 2,
    With
    The mobile communication system notifies the terrestrial communication system of the moving speed of the mobile body.
    A wireless communication system characterized by the fact that.
  7. 　規定された経路を移動する移動体に搭載される移動体通信システムと、地上に設置される地上通信システムとが、第１の無線通信方式、および前記第１の無線通信方式よりも伝送容量の大きい第２の無線通信方式で無線通信が可能な無線通信システムにおいて、前記移動体通信システムおよび前記地上通信システムのうち少なくとも一方が備える経路切替装置の制御回路であって、
    　前記移動体通信システムおよび前記地上通信システムは、前記経路の全域である第１の通信エリアにおいて前記第１の無線通信方式で無線通信が可能であり、前記経路の一部である第２の通信エリアにおいて前記第２の無線通信方式で無線通信が可能であり、
    　前記制御回路は、
    　前記第１の無線通信方式で無線通信を行う無線通信装置と通信が可能な第１の通信部と、
    　前記第２の無線通信方式で無線通信を行う無線通信装置と通信が可能な第２の通信部と、
    　通信相手に送信するデータを前記第１の通信部または前記第２の通信部に出力するかを決定し、前記データを前記第１の通信部または前記第２の通信部に出力する経路切替部と、
    　を備えることを特徴とする制御回路。     The mobile communication system mounted on the mobile body moving on the specified route and the terrestrial communication system installed on the ground have a transmission capacity higher than that of the first wireless communication system and the first wireless communication system. A control circuit for a route switching device included in at least one of the mobile communication system and the terrestrial communication system in a wireless communication system capable of wireless communication by a large second wireless communication method.
    The mobile communication system and the terrestrial communication system are capable of wireless communication by the first wireless communication method in a first communication area which is the entire area of the path, and are a part of the path. Wireless communication is possible in the area by the second wireless communication method.
    The control circuit
    A first communication unit capable of communicating with a wireless communication device that performs wireless communication by the first wireless communication method, and
    A second communication unit capable of communicating with a wireless communication device that performs wireless communication by the second wireless communication method, and
    A route switching unit that determines whether to output data to be transmitted to a communication partner to the first communication unit or the second communication unit, and outputs the data to the first communication unit or the second communication unit. When,
    A control circuit characterized by comprising.
  8. 　規定された経路を移動する移動体に搭載される移動体通信システムと、地上に設置される地上通信システムとが、第１の無線通信方式、および前記第１の無線通信方式よりも伝送容量の大きい第２の無線通信方式で無線通信が可能な無線通信システムにおいて、前記移動体通信システムおよび前記地上通信システムのうち少なくとも一方が備える経路切替装置に実行させるプログラムが記憶された記憶媒体であって、
    　前記移動体通信システムおよび前記地上通信システムは、前記経路の全域である第１の通信エリアにおいて前記第１の無線通信方式で無線通信が可能であり、前記経路の一部である第２の通信エリアにおいて前記第２の無線通信方式で無線通信が可能であり、
    　前記プログラムは、
    　経路切替部が、通信相手に送信するデータを、前記第１の無線通信方式で無線通信を行う無線通信装置と通信が可能な第１の通信部、または前記第２の無線通信方式で無線通信を行う無線通信装置と通信が可能な第２の通信部に出力するかを決定する第１のステップと、
    　前記経路切替部が、前記第１のステップでの決定に基づいて、前記データを前記第１の通信部または前記第２の通信部に出力する第２のステップと、
    　を経路切替装置に実行させることを特徴とする記憶媒体。     The mobile communication system mounted on the mobile body moving on the specified route and the terrestrial communication system installed on the ground have a transmission capacity higher than that of the first wireless communication system and the first wireless communication system. A storage medium in which a program to be executed by a route switching device included in at least one of the mobile communication system and the terrestrial communication system is stored in a wireless communication system capable of wireless communication by a large second wireless communication method. ,
    The mobile communication system and the terrestrial communication system are capable of wireless communication by the first wireless communication method in a first communication area which is the entire area of the path, and are a part of the path. Wireless communication is possible in the area by the second wireless communication method.
    The program
    The route switching unit wirelessly communicates the data transmitted to the communication partner by the first communication unit capable of communicating with the wireless communication device that performs wireless communication by the first wireless communication method, or by the second wireless communication method. The first step of determining whether to output to a second communication unit capable of communicating with the wireless communication device that performs
    A second step in which the route switching unit outputs the data to the first communication unit or the second communication unit based on the determination in the first step.
    A storage medium, characterized in that the route switching device executes the above.
  9. 　規定された経路を移動する移動体に搭載される移動体通信システムと、地上に設置される地上通信システムとが、第１の無線通信方式、および前記第１の無線通信方式よりも伝送容量の大きい第２の無線通信方式で無線通信が可能な無線通信システムにおいて、前記移動体通信システムおよび前記地上通信システムのうち少なくとも一方が備える経路切替装置における経路切替方法であって、
    　前記移動体通信システムおよび前記地上通信システムは、前記経路の全域である第１の通信エリアにおいて前記第１の無線通信方式で無線通信が可能であり、前記経路の一部である第２の通信エリアにおいて前記第２の無線通信方式で無線通信が可能であり、
    　経路切替部が、通信相手に送信するデータを、前記第１の無線通信方式で無線通信を行う無線通信装置と通信が可能な第１の通信部、または前記第２の無線通信方式で無線通信を行う無線通信装置と通信が可能な第２の通信部に出力するかを決定する第１のステップと、
    　前記経路切替部が、前記第１のステップでの決定に基づいて、前記データを前記第１の通信部または前記第２の通信部に出力する第２のステップと、
    　を含むことを特徴とする経路切替方法。     The mobile communication system mounted on the mobile body moving on the specified route and the terrestrial communication system installed on the ground have a transmission capacity higher than that of the first wireless communication system and the first wireless communication system. A route switching method in a route switching device included in at least one of the mobile communication system and the terrestrial communication system in a wireless communication system capable of wireless communication by a large second wireless communication method.
    The mobile communication system and the terrestrial communication system are capable of wireless communication by the first wireless communication method in a first communication area which is the entire area of the path, and are a part of the path. Wireless communication is possible in the area by the second wireless communication method.
    The route switching unit wirelessly communicates the data transmitted to the communication partner by the first communication unit capable of communicating with the wireless communication device that performs wireless communication by the first wireless communication method, or by the second wireless communication method. The first step of determining whether to output to a second communication unit capable of communicating with the wireless communication device that performs
    A second step in which the route switching unit outputs the data to the first communication unit or the second communication unit based on the determination in the first step.
    A route switching method characterized by including.
PCT/JP2019/045121 2019-11-18 2019-11-18 Route switching device, wireless communication system, control circuit, storage medium, and route switching method WO2021100095A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2021557844A JP7076653B2 (en) 2019-11-18 2019-11-18 Route switching device and wireless communication system
PCT/JP2019/045121 WO2021100095A1 (en) 2019-11-18 2019-11-18 Route switching device, wireless communication system, control circuit, storage medium, and route switching method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2019/045121 WO2021100095A1 (en) 2019-11-18 2019-11-18 Route switching device, wireless communication system, control circuit, storage medium, and route switching method

Publications (1)

Publication Number Publication Date
WO2021100095A1 true WO2021100095A1 (en) 2021-05-27

Family

ID=75981525

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2019/045121 WO2021100095A1 (en) 2019-11-18 2019-11-18 Route switching device, wireless communication system, control circuit, storage medium, and route switching method

Country Status (2)

Country Link
JP (1) JP7076653B2 (en)
WO (1) WO2021100095A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210184748A1 (en) * 2019-12-16 2021-06-17 Qualcomm Incorporated Techniques for using sensor information for wireless communications

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010130133A (en) * 2008-11-26 2010-06-10 Kobe Steel Ltd Radio communication terminal, and radio communication system
JP2014187499A (en) * 2013-03-22 2014-10-02 Sharp Corp Mobile communication terminal and mobile communication system
WO2017183205A1 (en) * 2016-04-22 2017-10-26 三菱電機株式会社 Mobile body communication apparatus, communication medium information generation apparatus, and communication medium switching method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014090376A (en) 2012-10-31 2014-05-15 Mitsubishi Heavy Ind Ltd Radio communication system, radio communication method, mobile station, program and recording medium

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010130133A (en) * 2008-11-26 2010-06-10 Kobe Steel Ltd Radio communication terminal, and radio communication system
JP2014187499A (en) * 2013-03-22 2014-10-02 Sharp Corp Mobile communication terminal and mobile communication system
WO2017183205A1 (en) * 2016-04-22 2017-10-26 三菱電機株式会社 Mobile body communication apparatus, communication medium information generation apparatus, and communication medium switching method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210184748A1 (en) * 2019-12-16 2021-06-17 Qualcomm Incorporated Techniques for using sensor information for wireless communications
US11831382B2 (en) * 2019-12-16 2023-11-28 Qualcomm Incorporated Techniques for using sensor information for wireless communications

Also Published As

Publication number Publication date
JPWO2021100095A1 (en) 2021-05-27
JP7076653B2 (en) 2022-05-27

Similar Documents

Publication Publication Date Title
AU706667B2 (en) Creation of overlapping cells when using multi casing
JP7076653B2 (en) Route switching device and wireless communication system
EP3002889A1 (en) Multi-mode base station control method and base station
US20140052812A1 (en) Content distribution system, control apparatus, and content distribution method
US10764808B2 (en) Method for performing a handover process for a mobile radio network terminal in a mobile radio network, corresponding apparatuses for performing the method, transportation vehicle and core network management device, and corresponding computer programs
US10700763B2 (en) Wireless relay device, wireless relay method, and computer readable medium
US7994942B2 (en) Method and apparatus for delivering data based on sensor network
CN112005581A (en) Base station apparatus in wireless communication system that performs handover including relay transmission path, control method thereof, and program
WO2005081530A1 (en) Monitoring system, monitoring device, and monitoring method
CN113615250A (en) Communication device, user terminal, communication system, and program
CN105792289A (en) Data transmission method, related node, and system
US20140229523A1 (en) Content delivery system, control apparatus, and content delivery method
CN114258700A (en) Information transmission method, device, communication equipment and storage medium
CN114342470A (en) Satellite communication method and device, storage medium
US8634824B2 (en) Method for updating a monitoring list of information identifying cells transferred by a base station of a wireless telecommunication network in a cell managed by the base station
CN114828121B (en) Wireless roaming control method and device and electronic equipment
CN113615254B (en) Communication system, terminal device, control method, and storage medium
CN113632523B (en) Communication device, user terminal, communication system, control method therefor, and storage medium
El Ali et al. A light architecture for opportunistic vehicle-to-infrastructure communications
WO2018163962A1 (en) Communication system and communication method
CN110581728A (en) Wireless communication device
Puangnak et al. Evaluation of mqtt and coap for vehicle traffic monitoring
WO2023112501A1 (en) Mobile terminal, radio communication system, and communication control program
WO2024105812A1 (en) Management control device, communication system, and control method
CN111510885B (en) Roaming switching system and method of wireless fidelity network

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19953154

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2021557844

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19953154

Country of ref document: EP

Kind code of ref document: A1