WO2024018555A1 - Système de radiocommunication sans fil - Google Patents

Système de radiocommunication sans fil Download PDF

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Publication number
WO2024018555A1
WO2024018555A1 PCT/JP2022/028160 JP2022028160W WO2024018555A1 WO 2024018555 A1 WO2024018555 A1 WO 2024018555A1 JP 2022028160 W JP2022028160 W JP 2022028160W WO 2024018555 A1 WO2024018555 A1 WO 2024018555A1
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WIPO (PCT)
Prior art keywords
call control
station
wireless communication
mobile station
base station
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PCT/JP2022/028160
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English (en)
Japanese (ja)
Inventor
陽平 小菅
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三菱電機株式会社
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Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2022/028160 priority Critical patent/WO2024018555A1/fr
Publication of WO2024018555A1 publication Critical patent/WO2024018555A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges

Definitions

  • the present disclosure relates to a wireless communication system.
  • train wireless communication system that includes a mobile station mounted on a train, a base station installed along the route of the train, and a central station that performs voice communication with the mobile station via the base station.
  • the train may move across the communication areas covered by each system.
  • the train crew member located in the boundary zone between two voice communication systems makes a call to a dispatcher at a command center that manages train operations, etc.
  • the train's current voice communication system is covered. It is necessary to consider moving from an area covered by other voice communication methods to an area covered by another voice communication method.
  • one or more aspects of the present disclosure aim to appropriately link the wireless systems to be used near the boundary between different voice communication systems in a wireless communication system.
  • a wireless communication system includes a mobile station that performs wireless communication using a first wireless communication method and a second wireless communication method different from the first wireless communication method; , a first base station that performs wireless communication using the first wireless communication method; the mobile station; a second base station that performs wireless communication using the second wireless communication method; a first central station connected to one base station, and a second central station connected to the second base station, the first central station and the second central station, When the mobile station establishes synchronization with the first base station, the mobile station communicates with the first base station.
  • first on-line information which is on-line information indicating that the first base station can receive a signal from the first base station
  • the first base station transmits the first on-line information to the first central station.
  • the first central station transfers the first on-line location information to the second central station, and when the mobile station establishes synchronization with the second base station,
  • the mobile station transmits second on-line information, which is on-line information indicating that the mobile station can receive a signal from the second base station, to the second base station, and is characterized in that the second line location information is transmitted to the second central station, and the second central station transfers the second line location information to the first central station.
  • a wireless communication system in a wireless communication system, it is possible to appropriately link the wireless systems to be used near the boundary between different voice communication systems.
  • FIG. 1 is a block diagram schematically showing the configuration of a train wireless communication system.
  • 3 is a graph showing characteristics of radio waves used in a first wireless communication method and a second wireless communication method. This is a first example showing the relationship between a boundary where communication can be performed using the first wireless communication method, a boundary where communication can be performed using the second wireless communication method, and a mobile station.
  • FIG. 2 is a block diagram schematically showing the configuration of a central office.
  • (A) and (B) are block diagrams showing examples of hardware configurations.
  • FIG. 2 is a block diagram schematically showing the configuration of a base station.
  • FIG. 2 is a block diagram schematically showing the configuration of a mobile station.
  • FIG. 3 is a sequence diagram showing a first example of handover operation in the first embodiment.
  • 7 is a sequence diagram showing a second example of handover operation in the first embodiment.
  • 7 is a sequence diagram showing a first example of handover operation in Embodiment 2.
  • FIG. 7 is a sequence diagram showing a second example of handover operation in Embodiment 2.
  • FIG. 1 is a block diagram schematically showing the configuration of a train wireless communication system 100, which is a wireless communication system according to the first embodiment.
  • Train wireless communication system 100 includes a ground station system 101 and a mobile station 150.
  • the ground station system 101 also includes a first central station 110A, first base stations 130A#1 and 130A#2 that use a first wireless communication method, and a second central station 110B and a first wireless communication system. and second base stations 130B#1 and 130B#2 that use a second wireless communication method according to a protocol different from the second base station 130B#1 and 130B#2.
  • Mobile station 150 performs wireless communication using both the first wireless communication method and the second wireless communication method.
  • the mobile station 150 is mounted on a train (not shown) and moves as the train moves.
  • the train wireless communication system 100 uses the first wireless communication method and the second wireless communication method to communicate voice between the first central station 110A and the second central station 110B and the mobile station 150. Make a call. Further, the first central station 110A and the second central station 110B are capable of communicating with each other.
  • each of the first central station 110A and the second central station 110B will be referred to as the central station 110 unless it is necessary to specifically distinguish between the first central station 110A and the second central station 110B. If there is no particular need to distinguish between the first base station 130A#1 and the first base station 130A#2, each of the first base station 130A#1 and the first base station 130A#2 is It is called a base station 130A. If there is no particular need to distinguish between the second base station 130B#1 and the second base station 130B#2, each of the second base station 130B#1 and the second base station 130B#2 is It is called a base station 130B. Furthermore, if there is no particular need to distinguish between the first base station 130A and the second base station 130B, each of the first base station 130A and the second base station 130B will be referred to as a base station 130.
  • first base station 130A#1 and the first base station 130A#2 included in the train wireless communication system 100 is not limited to two, and may be one or more.
  • second base stations 130B#1 and second base stations 130B#2 included in train radio communication system 100 is also not limited to two, and may be one or more.
  • a wireless system boundary 102 is set between the first base station 130A#2 that uses the first wireless communication system and the second base station 130B#1 that uses the second wireless communication system. There is.
  • the first central station 110A is under the jurisdiction of the command center
  • the mobile station 150 is located closer to the second base station 130A than the wireless system boundary 102.
  • the second central station 110B is located on the side of the base station 130B, the second central station 110B is under the jurisdiction of the command center.
  • FIG. 2 is a graph showing the characteristics of radio waves used in the first wireless communication method and the second wireless communication method.
  • Line L1 in FIG. 2 shows the electric field strength of radio waves used in the first wireless communication method at a distance from the base station
  • line L2 in FIG. 2 shows the electric field strength of radio waves used in the second wireless communication method. It shows the electric field strength at a distance from the base station.
  • the electric field strength of the radio waves used in the first wireless communication method is almost constant in the communicable area, and decreases near the boundary with the non-communicable area. It has the characteristic of rapidly decreasing. Therefore, the wireless system boundary 102 is set near the boundary between a communicable area and a non-communicable area.
  • the first wireless communication method is a wireless communication method using LCX (Leaky CoXial cable).
  • the radio waves used in the second wireless communication method have a characteristic that the electric field strength decreases according to the inverse square law as the distance from the radio wave generation source increases.
  • the second wireless communication method is a wireless communication method using an antenna.
  • a boundary 104 that allows communication using the wireless communication method exists at a position away from the wireless method boundary 102.
  • An area 105 between the boundary 103 and the boundary 104 is an area where communication is possible using both the first wireless communication method and the second wireless communication method. Therefore, the first base station 130A#2 can establish radio synchronization with the mobile station 150 up to the boundary 103, and the second base station 130B has a large overreach and can establish wireless synchronization with the mobile station 150 up to the boundary 104. Radio synchronization can be established with mobile station 150.
  • FIG. 4 is a block diagram schematically showing the configuration of central office 110.
  • the central station 110 includes a communication section 111, a communication control section 112, and a command console 113.
  • the communication unit 111 communicates with other central stations 110 and base stations 130 .
  • the communication unit 111 is connected to other central stations 110 and base stations 130, and communicates with the other central stations 110 and base stations 130 that are connected.
  • the communication control unit 112 controls communication via the communication unit 111.
  • the communication control unit 112 receives line location information from the base station 130 or other central station 110 via the communication unit 111, and provides the line location information to the command console 113. Further, the communication control unit 112 sends the line location information from the base station 130 to other central stations 110 via the communication unit 111. Furthermore, the communication control unit 112 receives call control status information from the base station 130 or other central station 110 via the communication unit 111, and provides the call control status information to the command console 113. Furthermore, the communication control unit 112 sends call control status information from the base station 130 to other central stations 110 via the communication unit 111.
  • the command console 113 functions as a central station control unit that controls the central station 110, a display unit that displays a screen, an audio output unit that is a speaker for voice calls, and an audio input unit that is a microphone for voice calls. Thereby, the command console 113 can confirm the contents of the call. Confirming the contents of a call means that it is possible to display which base station 130 the mobile station 150 is connected to, and to make and receive calls with that mobile station 150.
  • the command console 113 of the first central station 110A can use the first call control method and cannot use the second call control method.
  • the command console 113 of the second central station 110B can use the second call control method and cannot use the first call control method.
  • the communication unit 111, communication control unit 112, and command console 113 of the first central station 110A are also referred to as the communication unit 111A, communication control unit 112A, and command console 113A
  • the communication unit 111, the communication control unit 112, and the command console 113 are also referred to as the communication unit 111B, the communication control unit 112B, and the command console 113B.
  • the central office control unit and communication control unit 112 described above can be configured with a processor 11 such as a CPU (Central Processing Unit).
  • a processor 11 such as a CPU (Central Processing Unit).
  • Such a program may be provided through a network, or may be provided recorded on a recording medium. That is, such a program may be provided as a program product, for example.
  • part or all of the central office control unit and the communication control unit 112 may be, for example, a single circuit, a composite circuit, a processor that operates on a program, or a processor that operates on a program, as shown in FIG. 5(B). It can also be configured with a processing circuit 12 such as a parallel processor, an ASIC (Application Specific Integrated Circuit), or an FPGA (Field Programmable Gate Array). As described above, the central office control section and the communication control section 112 can be realized by a processing circuit network.
  • the communication unit 111 can be realized by a communication interface such as a NIC (Network Interface Card).
  • NIC Network Interface Card
  • FIG. 6 is a block diagram schematically showing the configuration of base station 130.
  • the base station 130 includes a central station side communication section 131, a mobile station side communication section 132, and a base station control section 133.
  • the central station side communication unit 131 communicates with the central station 110.
  • the mobile station side communication unit 132 communicates with the mobile station.
  • the base station control unit 133 controls processing at the base station 130. For example, the base station control unit 133 outputs the signal received by the central station side communication unit 131 from the mobile station side communication unit 132, and outputs the signal received by the mobile station side communication unit 132 to the central station side communication unit. Output from 131.
  • Part or all of the base station control unit 133 described above includes, for example, the memory 10 and a CPU that executes a program stored in the memory 10, as shown in FIG. 5(A). It can be configured with a processor 11.
  • a program may be provided through a network, or may be provided recorded on a recording medium. That is, such a program may be provided as a program product, for example.
  • part or all of the base station control unit 133 may include, for example, a single circuit, a composite circuit, a processor that operates on a program, a parallel processor that operates on a program, or an ASIC, as shown in FIG. 5(B).
  • it can also be configured with a processing circuit 12 such as an FPGA.
  • the base station control unit 133 can be realized by a processing circuit network.
  • the central office side communication unit 131 can be realized by a communication interface such as a NIC.
  • the mobile station side communication unit 132 can be realized by a wireless communication interface that performs wireless communication.
  • FIG. 7 is a block diagram schematically showing the configuration of mobile station 150.
  • Mobile station 150 performs voice communication with central station 110 via base station 130.
  • Mobile station 150 performs voice communication in accordance with both the first wireless communication method and the second wireless communication method.
  • the signal itself for switching the wireless system can be transmitted using either the first wireless communication system or the second wireless communication system.
  • the mobile station 150 performs call control itself for voice communication using a first call control method used in the first wireless communication method and a second call control method used in the second wireless communication method. Although transmission and reception can only be performed using either one exclusively, for voice communication, it is possible to dynamically switch between the first wireless communication method and the second wireless communication method depending on the wireless synchronization state.
  • the mobile station 150 includes a first wireless communication section 151, second wireless communication sections 154A and 154B, and a mobile station control section 157.
  • the first wireless communication unit 151 performs wireless communication according to a first wireless communication method.
  • the first wireless communication section 151 includes a first receiving section 152 that receives a wireless signal according to a first wireless communication method, and a first transmitting section that transmits a wireless signal according to the first wireless communication method. 153.
  • the second wireless communication unit 154A performs wireless communication according to the second wireless communication method.
  • the second wireless communication unit 154A includes a second receiving unit 155A that receives a wireless signal according to a second wireless communication method, and a second transmitter that transmits a wireless signal according to the second wireless communication method. 156A.
  • the second wireless communication unit 154B performs wireless communication according to the second wireless communication method.
  • the second wireless communication unit 154B includes a second receiving unit 155B that receives a wireless signal according to a second wireless communication method, and a second transmitter that transmits a wireless signal according to the second wireless communication method. 156B.
  • each of the first wireless communication section 151 and the second wireless communication section 154 is not limited to the number shown in the figure, and each number may be one or more.
  • first wireless communication unit 151 and the second wireless communication unit 154 in the mobile station 150 may be mounted in either the leading car or the tail car of the train, and the mounting positions in the train may be specifically determined. may be 400 meters away.
  • the mobile station control unit 157 controls processing at the mobile station 150.
  • Part or all of the mobile station control unit 157 described above includes, for example, the memory 10 and a CPU that executes a program stored in the memory 10, as shown in FIG. 5(A). It can be configured with a processor 11.
  • a program may be provided through a network, or may be provided recorded on a recording medium. That is, such a program may be provided as a program product, for example.
  • a part or all of the mobile station control unit 157 may include, for example, a single circuit, a composite circuit, a processor that operates on a program, a parallel processor that operates on a program, or an ASIC, as shown in FIG. 5(B). Alternatively, it can also be configured with a processing circuit 12 such as an FPGA. As described above, the mobile station control unit 157 can be realized by a processing circuit network.
  • first wireless communication unit 151 can be realized by a wireless communication interface compatible with the first wireless communication method.
  • the second wireless communication unit 154 can be realized by a wireless communication interface compatible with the second wireless communication method.
  • FIG. 8 is a sequence diagram showing a first example of handover operation in the first embodiment.
  • FIG. 8 shows a state in which the mobile station 150 exists outside the boundary 104 where it can communicate using the second wireless communication method and can only communicate using the first wireless communication method, as shown in FIG. 10, the mobile station 150 exists in the area 105 and can communicate using both the first wireless communication method and the second wireless communication method, as shown in FIG.
  • This is an example in which the mobile station 150 exists outside the boundary 103 where it can communicate using the first wireless communication method, and transitions to a state where it can communicate only using the second wireless communication method.
  • the mobile station 150 exists outside the boundary 104 where it can communicate using the second wireless communication method, the first wireless communication of the mobile station 150
  • the unit 151 establishes synchronization with the first base station 130A#2 using the first wireless communication method (S10).
  • the mobile station control unit 157 selects the first call control method as the call control method (S11), and notifies the first wireless communication unit 151 of the call control state according to the first call control method (S12). ). In other words, when synchronization with the base station 130 is newly established, the mobile station control unit 157 transmits call control status information and line location information to the central station via the base station 130 with which synchronization has been newly established. 110.
  • the first wireless communication unit 151 transmits call control state information indicating the notified call control state and line presence information indicating a line presence state to the first base station 130A# using the first wireless communication method. 2 (S13).
  • the line location information may be information indicating that a wireless signal from the first base station 130A can be received.
  • the call control status information indicating that the first call control method is selected is also referred to as first call control status information
  • the call control status information indicating that the wireless signal from the first base station 130A can be received is called the call control status information indicating that the first call control method is selected.
  • first line location information also referred to as first line location information.
  • the first base station 130A#2 transmits the received call control status information and line location information to the first central station 110A (S14).
  • the communication control unit 112A Upon receiving the call control status information and on-line information via the communication unit 111A, the communication control unit 112A sends the call control status information and on-line information to the command console 113A (S15).
  • the command console 113A displays the location information of the mobile station 150. In this case, the command console 113A can recognize that the mobile station 150 has selected the first call control method, and therefore starts call control for the mobile station 150 using the first call control method. can do.
  • the communication control unit 112A transfers the call control status information and line location information to the second central station 110B via the communication unit 111A (S16).
  • the communication control unit 112B Upon receiving the call control status information and line presence information via the communication unit 111B, the communication control unit 112B sends the call control status information and line presence information to the command console 113B (S17).
  • the command console 113B displays the location information of the mobile station 150.
  • the command console 113B can recognize that the mobile station 150 has selected the first call control method, and therefore starts call control for the mobile station 150 using the second call control method. You can figure out what you can't do.
  • the second wireless communication unit 154 communicates with the second base station using the second wireless communication method. 130B#1 is established (S18).
  • the mobile station control section 157 selects the first call control method as the call control method and notifies the second wireless communication section 154 of the call control state according to the first call control method (S19).
  • the second wireless communication unit 154 transmits the call control status information indicating the notified call control status and the line presence information indicating the line presence status to the second base station 130B# using the second wireless communication method. 1 (S20).
  • the on-line information may be information indicating that a wireless signal from the second base station 130B can be received.
  • the call control status information indicating that the second call control method is selected is also referred to as second call control status information
  • the call control status information indicating that the wireless signal from the second base station 130B can be received is called the call control status information indicating that the second call control method is selected.
  • second line location information also referred to as second line location information.
  • the second base station 130B#1 transmits the received call control status information and line location information to the second central station 110B (S21).
  • the communication control unit 112B Upon receiving the call control status information and on-line information via the communication unit 111B, the communication control unit 112B sends the received call control status information and on-line information to the command console 113B (S22).
  • the command console 113B displays the location information of the mobile station 150.
  • the command console 113B can recognize that the mobile station 150 has selected the first call control method, and therefore starts call control for the mobile station 150 using the second call control method. You can figure out what you can't do.
  • the communication control unit 112B transfers the call control status information and line location information to the first central station 110A via the communication unit 111B (S23).
  • the communication control unit 112A Upon receiving the call control status information and line presence information via the communication unit 111A, the communication control unit 112A sends the call control status information and line presence information to the command console 113A (S24).
  • the command console 113A displays the location information of the mobile station 150.
  • the command console 113A can recognize that the mobile station 150 has selected the first call control method, and therefore starts call control for the mobile station 150 using the first call control method. can do.
  • the first central station 110A and the mobile station 150 will perform a voice call via the second central station 110B and the second base station 130B. In other words, when the mobile station 150 establishes synchronization with a plurality of base stations 130, the voice call may be performed via the base station 130 with which synchronization has been newly established.
  • the mobile station control unit 157 performs call control.
  • the second call control method is selected as the method (S25). Specifically, when the synchronization with the first wireless communication section 151 is canceled, the mobile station control section 157 selects the second call control method as the call control method.
  • the command console of the first central station 110A 113A and the mobile station 150 can continue the voice call via the second central station 110B and the second base station 130B.
  • the mobile station control unit 157 notifies the second wireless communication unit 154 of the call control state based on the second call control method (S26).
  • the second wireless communication unit 154 transmits the received call control status information indicating the call control status and line presence information indicating the line presence status to the second base station 130B#1 using the second wireless communication method.
  • the on-line information may be information indicating that a wireless signal from the second base station 130B#1 can be received.
  • the second base station 130B#1 transmits the received call control status information and line location information to the second central station 110B (S28).
  • the communication control unit 112B Upon receiving the call control status information and line presence information via the communication unit 111B, the communication control unit 112B sends the received call control status information and line presence information to the command console 113B (S29). The command console 113B then displays the location information of the mobile station 150. In this case, the command console 113B can recognize that the mobile station 150 has selected the second call control method, and therefore starts call control for the mobile station 150 using the second call control method. can do.
  • the communication control unit 112B transfers the call control status information and line location information to the first central station 110A via the communication unit 111B (S30).
  • the communication control unit 112A Upon receiving the call control status information and line presence information via the communication unit 111A, the communication control unit 112A sends the call control status information and line presence information to the command console 113A (S31).
  • the command console 113A displays the location information of the mobile station 150.
  • the command console 113A can recognize that the mobile station 150 has selected the second call control method, and therefore starts call control for the mobile station 150 using the first call control method. You can figure out what you can't do.
  • the command console 113B specifies the second wireless communication method and provides the communication control unit 112B with a mobile station call to be made using the second call control method. (S32).
  • the communication control unit 112B transmits a mobile station paging using the second call control method to the second base station 120B#1 (S33).
  • the second base station 120B#1 transmits the mobile station call to the mobile station 150 using the second wireless communication method, and the second wireless communication unit 154 receives the wireless signal (S34).
  • the second wireless communication unit 154 gives the mobile station call to the mobile station control unit 157 (S35), and the mobile station control unit 157 performs call control to connect the central station 110 and the mobile station 150. It is possible to make voice calls with.
  • FIG. 11 is a sequence diagram showing a second example of handover operation in the first embodiment.
  • FIG. 11 shows a state where, as shown in FIG. 12, the mobile station 150 exists outside the boundary 104 where it can communicate using the first wireless communication method and can only communicate using the second wireless communication method. From there, as shown in FIG. 13, the mobile station 150 exists in the area 105 and can communicate using both the first wireless communication method and the second wireless communication method, and then the state shown in FIG. This is an example in which the mobile station 150 exists outside the boundary 104 where it can communicate using the second wireless communication method and transitions to a state where it can communicate only using the first wireless communication method.
  • the mobile station 150 exists outside the boundary 103 where it can communicate using the first wireless communication method, the first wireless communication of the mobile station 150
  • the unit 151 establishes synchronization with the second base station 130B#1 using the second wireless communication method (S40).
  • the mobile station control unit 157 selects the second call control method as the call control method (S41), and notifies the second radio communication unit 154 of the call control state based on the second call control method (S42). ).
  • the second wireless communication unit 154 transmits the call control status information indicating the notified call control status and the line presence information indicating the line presence status to the second base station 130B# using the second wireless communication method. 1 (S43).
  • the on-line information may be information indicating that a wireless signal from the second base station 130B#1 can be received.
  • the second base station 130B#1 transmits the received call control status information and line location information to the second central station 110B (S44).
  • the communication control unit 112B Upon receiving the call control status information and on-line information via the communication unit 111B, the communication control unit 112B sends the received call control status information and on-line information to the command console 113B (S45).
  • the command console 113B displays the location information of the mobile station 150. In this case, the command console 113B can recognize that the mobile station 150 has selected the second call control method, and therefore starts call control for the mobile station 150 using the second call control method. can do.
  • the communication control unit 112B transfers the call control status information and line location information to the first central station 110A via the communication unit 111B (S46).
  • the communication control unit 112A Upon receiving the call control status information and line presence information via the communication unit 111A, the communication control unit 112A sends the call control status information and line presence information to the command console 113A (S47).
  • the command console 113A displays the location information of the mobile station 150.
  • the command console 113A can recognize that the mobile station 150 has selected the second call control method, and therefore starts call control for the mobile station 150 using the first call control method. You can figure out what you can't do.
  • the first wireless communication unit 151 communicates with the first base station using the first wireless communication method. 130A#2 is established (S48).
  • the mobile station control section 157 selects the second call control method as the call control method, and notifies the first wireless communication section 151 of call control status information based on the second call control method (S49).
  • the first wireless communication unit 151 transmits the received call control status information and line presence information, which is information indicating the line presence status, to the first base station 130A#2 using the first wireless communication method (S50). .
  • the line location information may be information indicating that a wireless signal from the first base station 130A can be received.
  • the first base station 130A#2 transmits the received call control status information and line location information to the first central station 110A (S51).
  • the communication control unit 112A Upon receiving the call control status information and line presence information via the communication unit 111A, the communication control unit 112A sends the call control status information and line presence information to the command console 113A (S52).
  • the command console 113A displays the location information of the mobile station 150.
  • the command console 113A can recognize that the mobile station 150 has selected the second call control method, and therefore starts call control for the mobile station 150 using the first call control method. You can figure out what you can't do.
  • the communication control unit 112A transfers the call control status information and line location information to the second central station 110B via the communication unit 111A (S53).
  • the communication control unit 112B Upon receiving the call control status information and line presence information via the communication unit 111B, the communication control unit 112B sends the call control status information and line presence information to the command console 113B (S54).
  • the command console 113B displays the location information of the mobile station 150. In this case, the command console 113B can recognize that the mobile station 150 has selected the second call control method, and therefore starts call control for the mobile station 150 using the second call control method. can do.
  • the mobile station control unit 157 performs call control.
  • the first call control method is selected as the method (S55).
  • the mobile station control section 157 selects the first call control method as the call control method.
  • the first central station 110A of the first central station 110A can continue voice communication via the second central station 110B and second base station 130B#1.
  • the mobile station control unit 157 notifies the first wireless communication unit 151 of the call control state using the first call control method (S56).
  • the first wireless communication unit 151 transmits call control state information indicating the notified call control state and line presence information indicating a line presence state to the first base station 130A# using the first wireless communication method. 2 (S57).
  • the line location information may be information indicating that a wireless signal from the first base station 130A can be received.
  • the first base station 130A#2 transmits the received call control status information and line location information to the first central station 110A (S58).
  • the communication control unit 112A Upon receiving the call control status information and on-line information via the communication unit 111A, the communication control unit 112A sends the received call control status information and on-line information to the command console 113A (S59).
  • the command console 113A displays the location information of the mobile station 150. In this case, the command console 113A can recognize that the mobile station 150 has selected the first call control method, and therefore starts call control for the mobile station 150 using the first call control method. can do.
  • the communication control unit 112A transfers the call control status information and line location information to the second central station 110B via the communication unit 111A (S60).
  • the communication control unit 112B Upon receiving the call control status information and line presence information via the communication unit 111B, the communication control unit 112B sends the call control status information and line presence information to the command console 113B (S61).
  • the command console 113B displays the location information of the mobile station 150.
  • the command console 113B can recognize that the mobile station 150 has selected the first call control method, and therefore starts call control for the mobile station 150 using the second call control method. You can figure out what you can't do.
  • the command console 113A specifies the first wireless communication method and gives a mobile station call to the communication control unit 112A using the first call control method (S62). .
  • the communication control unit 112A transmits a mobile station call using the first call control method to the first base station 120A#2 (S63).
  • the first base station 120A#2 transmits the mobile station call to the mobile station 150 using the first wireless communication method, and the first wireless communication unit 151 receives the wireless signal (S64).
  • the first wireless communication unit 151 gives the mobile station call to the mobile station control unit 157 (S65), and the mobile station control unit 157 performs call control to connect the central station 110 and the mobile station 150. It is possible to make voice calls with.
  • the mobile station 150 transmits information from the first base station 130A to the first base station 130A.
  • First on-line information which is on-line information indicating that a signal can be received, is transmitted.
  • the first base station 130A transmits the first on-line information to the first central station 110A
  • the first central station 110A transmits the first on-line information to the second central station 110B. Transfer to.
  • the mobile station 150 transmits a signal from the second base station 130B to the second base station 130B.
  • the second base station 130B transmits second on-line information indicating that it is possible, and the second base station 130B transmits the second on-line information to the second central station 110B, and the second central station 110B
  • the second line location information is transferred to the first central station 110A. This allows both the first central station 110A and the second central station 110B, which use different communication methods, to know which base station 130 the mobile station 150 can communicate with. Become.
  • the mobile station 150 cancels synchronization with the first base station 130A after establishing synchronization with the second base station 130B, the mobile station 150 changes from the first call control method to the second call control method. and transmits second call control state information indicating that the second call control method has been selected to the second central station 110B via the second base station 130B.
  • the second central station 110B forwards its second call control status information to the first central station 110A.
  • the mobile station 150 cancels synchronization with the second base station 130B after establishing synchronization with the first base station 130A the mobile station 150 changes from the second call control method to the first call control method.
  • first central station 110A forwards the first call control state information to the second central station 110B. This allows both the first central station 110A and the second central station 110B to know which call control method is selected by the mobile station 150.
  • the mobile station 150 establishes synchronization with the second base station 130B while performing voice communication with the first central station 110A
  • the first central station 110A and the mobile station 150 Voice communications continue via the second central station 110B and the second base station 130B.
  • the mobile station 150 establishes synchronization with the first base station 130A while performing voice communication with the second central station 110B
  • the second central station 110B and the mobile station 150 continues voice communication via the first central station 110A and the first base station 130A.
  • the central station 110 can continue voice communication with the mobile station 150.
  • mobile station 150 and central station 110 can use the first wireless communication method and the second wireless communication method, and when performing voice communication, , it is possible to match which of the first wireless communication method and the second wireless communication method to use. Therefore, even if handover occurs between base stations 130 that use different wireless communication methods, the wireless communication methods used between the mobile station 150 and the central station 110 are linked, and the content of the call is You can check.
  • Embodiment 2 In the first embodiment, the mobile station 150 transmits the call control state information to the central station 110 along with the on-line information, but in the second embodiment, the on-line information and the call control state information are transmitted as separate signals.
  • a train wireless communication system 200 includes a ground station system 201 and a mobile station 250.
  • the ground station system 201 also includes a first central station 210A and first base stations 130A#1 and 130A#2, and a second central station 210B and second base stations 130B#1 and 130B#2. Be prepared.
  • the first base stations 130A#1, 130A#2 and the second base stations 130B#1, 130B#2 in the second embodiment are the same as the first base stations 130A#1, 130A#2 and the second base stations 130A#1, 130B#2 in the first embodiment. This is similar to the second base stations 130B#1 and 130B#2.
  • each of the first central station 210A and the second central station 210B will be referred to as the central station 210 unless it is necessary to specifically distinguish between the first central station 210A and the second central station 210B.
  • FIG. 4 is a block diagram schematically showing the configuration of central office 210 in the second embodiment.
  • the central station 210 includes a communication section 111, a communication control section 212, and a command console 113.
  • the communication unit 111 and the command console 113 of the central station 210 in the second embodiment are the same as the communication unit 111 and the command console 113 of the central station 110 in the first embodiment.
  • the communication control unit 212 controls communication via the communication unit 111.
  • the communication control unit 212 receives the line location information and call control status information separately from the base station 130 or other central station 210, so the communication control unit 212 processes these separately. do.
  • the processing method is the same as in the first embodiment.
  • the communication unit 111, communication control unit 212, and command console 113 of the first central station 210A are also referred to as the communication unit 111A, communication control unit 212A, and command console 113A
  • the communication unit 111, communication control unit 212, and command console 113 of the first central station 210A are also referred to as
  • the communication unit 111, the communication control unit 212, and the command console 113 are also referred to as the communication unit 111B, the communication control unit 212B, and the command console 113B.
  • FIG. 7 is a block diagram schematically showing the configuration of mobile station 250 in the second embodiment.
  • the mobile station 250 includes a first wireless communication section 251, second wireless communication sections 254A and 254B, and a mobile station control section 157.
  • Mobile station control unit 157 of mobile station 250 in the second embodiment is similar to mobile station control unit 157 of mobile station 150 in the first embodiment.
  • the first wireless communication unit 251 performs wireless communication according to a first wireless communication method.
  • the first wireless communication section 251 includes a first receiving section 152 that receives a wireless signal according to a first wireless communication method, and a first transmitting section that transmits a wireless signal according to the first wireless communication method. 253.
  • the first transmitter 253 transmits line location information to the base station 130 separately from the call control information from the mobile station controller 157.
  • the second wireless communication unit 254A performs wireless communication according to the second wireless communication method.
  • the second wireless communication unit 154A includes a second receiving unit 155A that receives a wireless signal according to a second wireless communication method, and a second transmitter that transmits a wireless signal according to the second wireless communication method. 256A.
  • the second transmitter 256A transmits line location information to the base station 130 separately from the call control information from the mobile station controller 157.
  • the second wireless communication unit 154B performs wireless communication according to the second wireless communication method.
  • the second wireless communication unit 154B includes a second receiving unit 155B that receives a wireless signal according to a second wireless communication method, and a second transmitter that transmits a wireless signal according to the second wireless communication method. 156B.
  • the second transmitter 256B transmits line location information to the base station 130 separately from the call control information from the mobile station controller 157.
  • second wireless communication unit 254A when there is no particular need to distinguish between the second wireless communication unit 254A and the second wireless communication unit 254B, they are referred to as a second wireless communication unit 254.
  • FIG. 15 is a sequence diagram showing a first example of handover operation in the second embodiment.
  • FIG. 15 shows a state where, as shown in FIG. 9, the mobile station 250 exists outside the boundary 104 where it can communicate using the second wireless communication method and can only communicate using the first wireless communication method. 3, the mobile station 250 exists in the area 105 and can communicate using both the first wireless communication method and the second wireless communication method, and then the state shown in FIG. This is an example in which the mobile station 250 exists outside the boundary 103 where it can communicate using the first wireless communication method, and transitions to a state where it can communicate only using the second wireless communication method.
  • the mobile station 250 exists outside the boundary 104 where it can communicate using the second wireless communication method, the first wireless communication of the mobile station 250
  • the unit 251 establishes synchronization with the first base station 130A#2 using the first wireless communication method (S70).
  • the first wireless communication unit 251 transmits the line location information to the first base station 130A#2 using the first wireless communication method (S71).
  • the first wireless communication unit 251 and the second wireless communication unit 254 communicate with the base station with which the synchronization has been newly established.
  • the line location information is transmitted to 130.
  • the first base station 130A#2 transmits the received line location information to the first central station 210A (S72).
  • the communication control unit 212A Upon receiving the line location information via the communication unit 111A, the communication control unit 212A sends the line location information to the command console 113A (S73). The command console 113A then displays the location information of the mobile station 250.
  • the communication control unit 212A transfers the line location information to the second central station 210B via the communication unit 111A (S74).
  • the communication control unit 212B Upon receiving the line location information via the communication unit 111B, the communication control unit 212B sends the line location information to the command console 113B (S75). The command console 113B then displays the location information of the mobile station 250.
  • the mobile station control unit 157 selects the first call control method as the call control method (S76), and notifies the first wireless communication unit 251 of the call control state based on the first call control method (S77). ).
  • the mobile station control unit 157 when mobile station control unit 157 newly establishes synchronization with base station 130, it transmits call control information to base station 130 with which synchronization has been newly established. Take control.
  • the first wireless communication unit 251 transmits call control status information indicating the notified call control status to the first base station 130A#2 using the first wireless communication method (S78).
  • the first base station 130A#2 transmits the received call control status information to the first central station 210A (S79).
  • the communication control unit 212A Upon receiving the call control status information via the communication unit 111A, the communication control unit 212A sends the received call control status information to the command console 113A (S80). As a result, the command console 113A can recognize that the mobile station 250 has selected the first call control method, and therefore starts call control for the mobile station 250 using the first call control method. can do.
  • the communication control unit 212A transfers the call control status information to the second central station 210B via the communication unit 111A (S81).
  • the communication control unit 212B Upon receiving the call control status information via the communication unit 111B, the communication control unit 212B sends the call control status information to the command console 113B (S82). As a result, the command console 113B recognizes that the mobile station 250 has selected the first call control method, and cannot start call control for the mobile station 150 using the second call control method. be able to understand that.
  • the second wireless communication unit 254 communicates with the second base station using the second wireless communication method. 130B#1 is established (S83).
  • the mobile station control section 157 selects the first call control method as the call control method and notifies the second wireless communication section 254 of the call control state according to the first call control method (S84).
  • the second wireless communication unit 254 transmits call control state information indicating the notified call control state to the second base station 130B#1 using the second wireless communication method (S85).
  • the second base station 130B#1 transmits the received call control state information to the second central station 210B (S86).
  • the communication control unit 212B Upon receiving the call control status information via the communication unit 111B, the communication control unit 212B sends the received call control status information to the command console 113B (S87). As a result, the command console 113B recognizes that the mobile station 250 has selected the first call control method, and cannot start call control for the mobile station 150 using the second call control method. be able to understand that.
  • the communication control unit 212B transfers the call control status information to the first central station 210A via the communication unit 111B (S88).
  • the communication control unit 212A Upon receiving the call control status information via the communication unit 111A, the communication control unit 212A sends the call control status information to the command console 113A (S89). Thereby, the command console 113A recognizes that the mobile station 250 has selected the first call control method, and starts call control with the mobile station 250 using the first call control method. can do.
  • step S83 since synchronization with the second base station 130B#1 is established, the second wireless communication unit 254 transmits the on-line information to the second base station 130B#1 using the second wireless communication method. Send (S90).
  • the second base station 130B#1 transmits the received line location information to the second central station 210B (S91).
  • the communication control unit 212B Upon receiving the line location information via the communication unit 111B, the communication control unit 212B sends the line location information to the command console 113B (S92). The command console 113B then displays the location information of the mobile station 250.
  • the communication control unit 212B transfers the line location information to the first central station 210A via the communication unit 111B (S93).
  • the communication control unit 212A Upon receiving the line location information via the communication unit 111A, the communication control unit 212A sends the line location information to the command console 113A (S94). The command console 113A then displays the location information of the mobile station 250.
  • the mobile station controller 157 of the mobile station 250 selects the second call control method as the call control method (S95). Specifically, when the synchronization with the first wireless communication section 151 is canceled, the mobile station control section 157 selects the second call control method as the call control method.
  • the mobile station 250 and the first central station can continue the voice call via the second central station 210B and the second base station 130B.
  • the mobile station control unit 157 notifies the second wireless communication unit 254 of the call control state based on the second call control method (S96).
  • the second wireless communication unit 254 transmits call control state information indicating the notified call control state to the second base station 130B#1 using the second wireless communication method (S97).
  • the second base station 130B#1 transmits the received call control state information to the second central station 210B (S98).
  • the communication control unit 212B Upon receiving the call control status information via the communication unit 111B, the communication control unit 212B sends the received call control status information to the command console 113B (S99). As a result, the command console 113B can recognize that the mobile station 250 has selected the second call control method, and therefore starts call control for the mobile station 250 using the second call control method. can do.
  • the communication control unit 212B transfers the call control status information to the first central station 210A via the communication unit 111B (S100).
  • the communication control unit 212A Upon receiving the call control status information via the communication unit 111A, the communication control unit 212A sends the call control status information to the command console 113A (S101). As a result, the command console 113A recognizes that the mobile station 250 has selected the second call control method, and cannot start call control for the mobile station 150 using the first call control method. be able to understand that.
  • the command console 113B specifies the second wireless communication method and gives a mobile station call to the communication control unit 212B using the second call control method (S102). .
  • the communication control unit 212B transmits a mobile station paging using the second call control method to the second base station 120B#1 (S103).
  • the second base station 120B#1 transmits the mobile station call to the mobile station 250 using the second wireless communication method, and the second wireless communication unit 254 receives the wireless signal (S104).
  • the second wireless communication unit 254 gives the mobile station call to the mobile station control unit 157 (S105), and the mobile station control unit 157 performs call control to connect the central station 210 and the mobile station 250. It is possible to make voice calls with.
  • FIG. 16 is a sequence diagram showing a second example of handover operation in the second embodiment.
  • FIG. 16 shows a transition from a state where the mobile station 250 exists outside the boundary 104 where it can communicate using the first wireless communication method, as shown in FIG. 12, and can only communicate using the second wireless communication method.
  • the mobile station 250 exists in the area 105 and is able to communicate using both the first wireless communication method and the second wireless communication method, and then the state shown in FIG. This is an example in which the mobile station 250 exists outside the boundary 104 where it can communicate using the second wireless communication method and transitions to a state where it can communicate only using the first wireless communication method.
  • the mobile station 250 if the mobile station 250 exists outside the boundary 103 where it can communicate using the first wireless communication method, the mobile station 250's first wireless communication
  • the unit 251 establishes synchronization with the second base station 130B#1 using the second wireless communication method (S110).
  • the second wireless communication unit 254 transmits the line location information to the second base station 130B#1 using the second wireless communication method (S111).
  • the second base station 130B#1 transmits the received line location information to the second central station 210B (S112).
  • the communication control unit 212B Upon receiving the line location information via the communication unit 111B, the communication control unit 212B sends the line location information to the command console 113B (S113). The command console 113B then displays the location information of the mobile station 250.
  • the communication control unit 212B transfers the line location information to the first central station 210A via the communication unit 111B (S114).
  • the communication control unit 212A Upon receiving the line location information via the communication unit 111A, the communication control unit 212A sends the line location information to the command console 113A (S115). The command console 113A then displays the location information of the mobile station 250.
  • the mobile station control section 157 selects the second call control method as the call control method (S116), and notifies the second wireless communication section 154 of the call control state according to the second call control method (S117).
  • the second wireless communication unit 254 transmits call control status information indicating the notified call control status to the second base station 130B#1 using the second wireless communication method (S118).
  • the second base station 130B#1 transmits the received call control state information to the second central station 110B (S119).
  • the communication control unit 212B Upon receiving the call control status information via the communication unit 111B, the communication control unit 212B sends the received call control status information to the command console 113B (S120). As a result, the command console 113B can recognize that the mobile station 250 has selected the second call control method, and therefore starts call control for the mobile station 250 using the second call control method. can do.
  • the communication control unit 212B transfers the call control status information to the first central station 210A via the communication unit 111B (S121).
  • the communication control unit 212A Upon receiving the call control status information via the communication unit 111A, the communication control unit 212A sends the call control status information to the command console 113A (S122). As a result, the command console 113A recognizes that the mobile station 250 has selected the second call control method, and cannot start call control for the mobile station 150 using the first call control method. be able to understand that.
  • the first wireless communication unit 251 uses the first wireless communication method to communicate with the first base station. 130A#2 is established (S123).
  • the first wireless communication unit 251 transmits the line location information to the first base station 130A#2 using the first wireless communication method (S124).
  • the first base station 130A#2 transmits the received line location information to the first central station 210A (S125).
  • the communication control unit 212A Upon receiving the line location information via the communication unit 111A, the communication control unit 212A sends the line location information to the command console 113A (S126). The command console 113A then displays the location information of the mobile station 250.
  • the communication control unit 212A transfers the line location information to the second central station 210B via the communication unit 111A (S127).
  • the communication control unit 212B Upon receiving the line location information via the communication unit 111B, the communication control unit 212B sends the line location information to the command console 113B (S128). The command console 113B then displays the location information of the mobile station 250.
  • the mobile station control section 157 selects the second call control method as the call control method and notifies the first wireless communication section 251 of the call control state according to the second call control method (S129).
  • the first wireless communication unit 251 transmits the received call control state information to the first base station 130A#2 using the first wireless communication method (S130).
  • the first base station 130A#2 transmits the received call control state information to the first central station 210A (S131).
  • the communication control unit 212A Upon receiving the call control status information and line location information via the communication unit 111A, the communication control unit 212A sends the received call control status information to the command console 113A (S132). As a result, the command console 113A recognizes that the mobile station 250 has selected the second call control method, and cannot start call control for the mobile station 150 using the first call control method. be able to understand that.
  • the communication control unit 212A sends the received call control status information to the second central station 210B (S133).
  • the communication control unit 212B Upon receiving the call control status information via the communication unit 111B, the communication control unit 212B sends the received call control status information to the command console 113B (S134). As a result, the command console 113B can recognize that the mobile station 250 has selected the second call control method, and therefore starts call control for the mobile station 250 using the second call control method. can do.
  • the mobile station control unit 157 performs call control.
  • the first call control method is selected as the method (S135).
  • the mobile station control unit 157 selects the first call control method as the call control method.
  • the mobile station 250 and the second central station 210B may continue the voice call via the first central station 210A and the first base station 130A.
  • the mobile station control unit 157 notifies the first wireless communication unit 251 of the call control state using the first call control method (S136).
  • the first wireless communication unit 251 transmits call control status information indicating the notified call control status to the first base station 130A#2 using the first wireless communication method (S137).
  • the first base station 130A#2 transmits the received call control state information to the first central station 210A (S138).
  • the communication control unit 212A Upon receiving the call control status information via the communication unit 111A, the communication control unit 212A sends the received call control status information to the command console 113A (S139). As a result, the command console 113A can recognize that the mobile station 250 has selected the first call control method, and therefore starts call control for the mobile station 250 using the first call control method. can do.
  • the communication control unit 212A transfers the call control status information to the second central station 210B via the communication unit 111A (S140).
  • the communication control unit 212B Upon receiving the call control status information via the communication unit 111B, the communication control unit 212B sends the call control status information to the command console 113B (S141). As a result, the command console 113B recognizes that the mobile station 250 has selected the first call control method, and cannot start call control for the mobile station 150 using the second call control method. be able to understand that.
  • the command console 113A specifies the first wireless communication method and gives a mobile station call to the communication control unit 212A using the first call control method (S142). .
  • the communication control unit 212A transmits a mobile station call using the first call control method to the first base station 120A#2 (S143).
  • the first base station 120A#2 transmits the mobile station call to the mobile station 250 using the first wireless communication method, and the first wireless communication unit 251 receives the wireless signal (S144).
  • the first wireless communication unit 251 gives the mobile station call to the mobile station control unit 157 (S145), and the mobile station control unit 157 performs call control to connect the central station 210 and the mobile station 250. It is possible to make voice calls with.
  • 100, 200 Train radio communication system, 101, 201 Ground station system, 110A, 210A First central station, 110B, 210B Second central station, 111 Communication department, 112, 212 Communication control department, 113 Command console, 130A No. 1 base station, 130B second base station, 131 central station side communication unit, 132 mobile station side communication unit, 133 base station control unit, 150, 250 mobile station, 151, 251 first wireless communication unit, 154A, 154B, 254A, 254B second wireless communication unit, 157 mobile station control unit.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Lorsqu'une station mobile (150) établit une synchronisation avec une première station de base (130A), la station mobile (150) transmet, à la première station de base (130A), des premières informations sur rail qui sont des informations sur rail indiquant que la station mobile (150) peut recevoir un signal provenant de la première station de base (130A), la première station de base (130A) transmet les premières informations sur rail à une première station centrale (110A), et la première station centrale (110A) transfère les premières informations sur rail à une deuxième station centrale (110B). Lorsque la station mobile (150) établit une synchronisation avec une deuxième station de base (130B), la station mobile (150) transmet, à la deuxième station de base (130B), des deuxièmes informations sur rail qui sont des informations sur rail indiquant que la station mobile (150) peut recevoir un signal provenant de la deuxième station de base (130B), la deuxième station de base (130B) transmet les deuxièmes informations sur rail à la deuxième station centrale (110B), et la deuxième station centrale (110B) transfère les deuxièmes informations sur rail à la première station centrale (110A).
PCT/JP2022/028160 2022-07-20 2022-07-20 Système de radiocommunication sans fil WO2024018555A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11262047A (ja) * 1998-03-06 1999-09-24 Aiwa Co Ltd 記憶媒体およびそれを利用する通信端末装置
WO2008139707A1 (fr) * 2007-04-27 2008-11-20 Panasonic Corporation Terminal de communication mobile et dispositif de communication
JP2009141532A (ja) * 2007-12-05 2009-06-25 Hitachi Ltd 移動体音声通信システムおよび方法
JP2014060668A (ja) * 2012-09-19 2014-04-03 Mitsubishi Electric Corp 中央局

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11262047A (ja) * 1998-03-06 1999-09-24 Aiwa Co Ltd 記憶媒体およびそれを利用する通信端末装置
WO2008139707A1 (fr) * 2007-04-27 2008-11-20 Panasonic Corporation Terminal de communication mobile et dispositif de communication
JP2009141532A (ja) * 2007-12-05 2009-06-25 Hitachi Ltd 移動体音声通信システムおよび方法
JP2014060668A (ja) * 2012-09-19 2014-04-03 Mitsubishi Electric Corp 中央局

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