Wireless communication system and wireless communication method

Abstract

To provide a wireless communication system capable of solving problems in the operation of multiple carriers on the same frequency.SOLUTION: The wireless communication system includes: multiple base stations placed along a predetermined route along which mobile stations move; a communication control device that controls communication between the base stations and the mobile stations; and multiple command consoles that communicate with the mobile stations. The communication control device determines a command console that is commonable with the mobile station depending on the position of the mobile station.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a radio communication system, and more particularly to a train radio system that operates jointly at the same frequency in railway sections served by a plurality of operators. [Background technology]

[0002] In the railway industry, direct service between operators is implemented to improve convenience. In a typical train radio system, frequencies are assigned to each railway operator, and the frequency used at the boundary station is switched to allow trains to run on other companies' lines.

[0003] The following prior art exists as background art in this technical field: Patent Document 1 (JP 2002-77034 A) describes a wireless communication system having a central control device that controls communications within the system, at least one base station device connected to the central control device, and at least one optical wireless repeater device that is connected in parallel to each of the base station devices by an optical cable and arranged in a line, and that performs wireless communication with a mobile device that moves linearly in one direction, wherein each of the optical wireless repeater devices is assigned a unique identifier, and uplink data transmitted via each of the optical wireless repeater devices is transmitted with the identifier added, and the central control device recognizes the traveling direction of the mobile device from the identifier included in the uplink data from the base station and instructs the base station device to select an optical wireless repeater device to transmit downlink data in accordance with the recognized moving direction. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-77034 Summary of the Invention [Problem to be solved by the invention]

[0005] The background art mentioned above does not take into consideration the operation of multiple operators on the same frequency. Furthermore, if multiple operators assigned the same frequency build different wireless communication systems, radio waves will interfere at the borders of the areas, making calls impossible at border stations. Furthermore, one operator may act as a commander for another operator, making it necessary to continue calls across operators.

[0006] The present invention aims to solve the above-mentioned problems that arise when multiple operators operate on the same frequency. [Means for solving the problem]

[0007] A representative example of the invention disclosed in the present application is as follows: That is, a wireless communication system includes a plurality of base stations arranged along a predetermined route along which a mobile station moves, a communication control device that controls communication between the base stations and the mobile station, a first command console that is managed by a first operator and communicates with the mobile station, and a second command console that is managed by a second operator and communicates with the mobile station, wherein the plurality of base stations define a communication range with the mobile station on the first operator side and form a first zone that includes a boundary between the first operator and the second operator, and a second zone that defines a communication range with the mobile station on the second operator side and form a boundary between the first operator and the second operator, and the communication control device determining a control console that can communicate with the mobile station according to a zone in which the mobile station is located and a type of the control console, and controlling communication between the mobile station and the determined control console to be performed on a zone-by-zone basis; When the mobile station is in a call with the first command console or the second command console and reaches either the second zone from the first zone or the first zone from the second zone before crossing the boundary between the first operator and the second operator, whether to continue the call between the mobile station and the command console across zones is determined according to the type of the command console.

[0010] In addition, in one example of a wireless communication system of the present invention, the zone is located on the boundary between the first operator and the second operator, and includes a first zone on the side of the first operator and a second zone on the side of the second operator, and the communication control device is characterized in that, when the mobile station reaches either a zone adjacent to the first zone or a zone adjacent to the second zone after crossing the boundary between the first operator and the second operator, it determines whether to narrow the zone in which the mobile station can make calls.

[0011] In addition, in one example of a wireless communication system of the present invention, the zone is located on the boundary between the first operator and the second operator, and includes a first zone on the side of the first operator and a second zone on the side of the second operator, and each of the first zone and the second zone includes a plurality of communication areas formed by the base station, and the communication control device is characterized in that, when the mobile station reaches either a communication area adjacent to the first zone or a communication area adjacent to the second zone before crossing the boundary between the first operator and the second operator, the communication control device determines whether to expand the zone in which the mobile station can make calls beyond the operators.

[0012] In addition, in one example of a wireless communication system of the present invention, the zone is located on the boundary between the first operator and the second operator, and includes a first zone on the side of the first operator and a second zone on the side of the second operator, and each of the first zone and the second zone includes a plurality of communication areas formed by the base station, and the communication control device is characterized in that, when the mobile station reaches either the next communication area of ​​the communication area adjacent to the first zone or the next communication area of ​​the communication area adjacent to the second zone after crossing the boundary between the first operator and the second operator, the communication control device determines whether to reduce the zone in which the mobile station can make calls.

[0013] In addition, in one example of the wireless communication system of the present invention, the first operator and the second operator are assigned the same frequency for communication between the mobile station and the base station.

[0014] In addition, in a wireless communication method performed by a wireless communication system according to one example of the present invention, the communication control device determines a control console that can communicate with the mobile station according to the location of the mobile station. [Effects of the Invention]

[0015] According to one aspect of the present invention, wireless communication can be continued even across a boundary station between different operators to which the same frequency is assigned. Objects, configurations, and effects other than those described above will become apparent from the following description of the embodiments. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a block diagram showing the configuration of a train radio system according to an embodiment of the present invention; [Figure 2] 1 is a diagram showing the configuration of a railway line on which a train radio system according to an embodiment of the present invention is installed; [Figure 3] FIG. 10 is a sequence diagram of the on-board station location determination process at the start of a call in this embodiment. [Figure 4] FIG. 10 is a sequence diagram of a zone expansion determination process associated with movement of an on-board station device during a call in this embodiment. [Figure 5] FIG. 10 is a sequence diagram of the console-initiated call transfer determination process of the present embodiment. [Figure 6] FIG. 10 is a sequence diagram of a call forwarding determination process when a console is lost in this embodiment. [Figure 7] FIG. 10 is a diagram illustrating an example of system information for determining the call coverage area of ​​a carrier according to the present embodiment. [Figure 8] 1 is a diagram illustrating an example of a command console and a table that stores information about the command console in this embodiment. FIG. [Figure 9] FIG. 10 is a diagram showing an example of zone movement accompanying train travel in this embodiment. [Figure 10] FIG. 10 is a diagram showing another example of zone movement accompanying train travel in this embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0017] FIG. 1 is a block diagram showing the configuration of a train radio system according to an embodiment of the present invention.

[0018] The wireless communication system of this embodiment is a train wireless system, and in order to communicate at the same frequency on a line where multiple operators A and B operate direct trains, a separate system is not constructed for each operator, but rather the wireless communication system of operator B is constructed so that it is subordinate to the wireless communication system of operator A.

[0019] The train radio system of this embodiment includes a central control unit 10, an expansion unit 20, multiple base station devices 30, one or more command consoles 40, a command console call recording device 50, a carrier A railway telephone exchange 60, a command console 70, a carrier B railway telephone exchange 80, and a command console call recording device 90.

[0020] The central control unit 10 has a switching control unit 11, a call control unit 12, a clock board 13, a HUB board 14, multiple base station interfaces 15, a console interface 16, a recording interface 17, a railway telephone interface 18, and a location information table 19.

[0021] The switching control unit 11 controls the voice communication lines, such as setting up and disconnecting the voice communication lines. The call control unit 12 controls the voice communication lines, such as setting up and disconnecting the voice communication lines. The clock board 13 provides time information for adjusting timing within the train radio system. The HUB board 14 connects to the extension unit 20 and controls communication with the extension unit 20. The base station interface 15 connects to the base station device 30 that constitutes the train radio system and controls communication with the base station device 30. The console interface 16 connects to the command console 40 and controls communication with the command console 40. The recording interface 17 connects to the command console call recording device 50 and controls communication with the command console call recording device 50. The railway telephone interface 18 connects to the operator A railway telephone exchange 60 and controls communication with the operator A railway telephone exchange 60. The location information table 19 is a table used to determine the communication area in which the onboard station device (train) 100 is located, and records the operation number, train formation number, and location of the area. The location information table 19 is managed for each zone. When the central control device 10 recognizes that the onboard station device 100 has moved to an adjacent zone based on a response to all-line polling (hereinafter, po), the central control device 10 registers the zone in which the onboard station device 100 is located in the location information table 19.

[0022] The extension unit 20 includes a HUB board 24, one or more base station interfaces 25, a console interface 26, a recording interface 27, and a railway telephone interface 28.

[0023] The base station interface 25 connects to the base station device 30 that constitutes the train radio system and controls communication with the base station device 30. The console interface 26 connects to the command console 70 and controls communication with the command console 70. The recording interface 27 connects to the command console call recording device 90 and controls communication with the command console call recording device 90. The railway telephone interface 28 connects to the operator B railway telephone exchange 80 and controls communication with the operator B railway telephone exchange 80.

[0024] The command console 40 of operator A and the command console 70 of operator B are assigned a type so that they can be distinguished by the central control device 10. In addition, a communication-enabled operator is set for each base station zone, an operational area is established, and communication with the command console 40 and the command console 70 is restricted.

[0025] In this way, instead of separately providing a central control unit 10 for operator A, which acts as a command intermediary between operators, and a central control unit for operator B, which operates a wireless communication system on the same frequency, the system is constructed in the form of an expansion unit 20 in which operator B's control unit operates subordinately to operator A's central control unit 10. The expansion unit 20 operates according to the timing of the central control unit 10 and in accordance with the call control instructions and switching control instructions of the central control unit 10. This operation allows radio waves to be transmitted with synchronized timing between base stations, suppressing the effects of interference and enabling operation on the same frequency between operators. Furthermore, by consolidating call control in the central control unit 10, it is easy to allow simultaneous incoming calls from operator A and operator B, transfer calls between operators, and limit call sections. Furthermore, by dividing the system into the central control unit 10 and the expansion unit 20, the assets of each operator can be clarified.

[0026] FIG. 2 is a diagram showing the configuration of a railway line on which the train radio system of this embodiment is installed.

[0027] Each operator's route is covered by a zone, which is a range where communication is possible with one or more base station devices 30. In each zone, there may be one or more base station devices 30 that cover communication with the on-board station device 100. Specifically, operator A's route is divided into zones A, B, C, D, E, and F, and operator B's route is composed of zone G.

[0028] The tracks of operator A and operator B are connected, and trains run directly between them. The on-board station 100 is a radio station that is mounted on a train and moves as the train moves.

[0029] Each operator is capable of communicating with trains (on-board station equipment 100) running on its own line. Operator A's command console 40 can also communicate with trains (on-board station equipment 100) on Operator B's line by acting as a commander; that is, it can communicate with trains (on-board station equipment 100) on either Operator A's line or Operator B's line. On the other hand, Operator B's command console 70 can only communicate with trains (on-board station equipment 100) on Operator B's line (G zone) and in the F zone adjacent to the G zone. If a station on the boundary between Zones F and G is a boundary station between Operators A and B, it is necessary to enable calls at the boundary station not only in Zone G but also in Zone F. Therefore, Operator B's command console 70 can also communicate with trains (on-board station equipment 100) in the F zone. The call-enabled zone is defined by the base station zone type in the system information.

[0030] In the train radio system of this embodiment, the call status with the on-board station 100 is managed in units of zones formed by the communication areas of one or more base station devices 30. For example, when a call is in progress with the on-board station 100, it indicates that a radio signal for making a call with the on-board station 100 is being transmitted from the base station device 30 that constitutes the zone.

[0031] FIG. 3 is a sequence diagram of the on-board station location determination process at the start of a call according to the present invention.

[0032] The command console 70 of the operator B transmits a call setup request to call the on-board station with operation number 001 to the central control device 10 via the extension unit 20.

[0033] The central control device 10 determines whether to accept a call setup request by referring to the location information table 19. For example, whether to accept a call is determined based on a combination of the console type and the location of the called onboard station device 100. Specifically, a call setup request from the command console 40 of operator A is determined to be connectable regardless of the location of the called onboard station device 100 in zones A to G. A call setup request from the command console 70 of operator B is determined to be connectable if the location of the called onboard station device 100 is zones F to G, but is determined to be unconnectable in the other zones A to E.

[0034] If the central control device 10 can accept the call setup request, it transmits a paging signal to the base station device 30 in the zone where the onboard station device 100 to be called is located, and calls the onboard station device 100 with the train set number B01015. On the other hand, if the central control device 10 cannot accept the call setup request, it transmits an acceptance NG response to the command console 70 via the expansion unit 20.

[0035] Furthermore, when the on-board station device 100 makes a call and the central control device 10 is notified of the incoming call request, the central control device 10 selects a call zone from the location information of the on-board station device 100, and if the on-board station device 100 is located in zone F or G of operator B, both the command console 40 of operator A and the command console 70 of operator B perform the incoming call operation, and either the command console 40 or the command console 70 answers according to the agreement between the operators. Also, if necessary, the call is transferred between operators to continue the call with the on-board station device 100.

[0036] FIG. 4 is a sequence diagram of the zone expansion determination process according to the present invention, which is performed when the on-board station device 100 moves during a call.

[0037] The command console 70 of operator B is making a call via base station G to an onboard station 100 located in zone G. At this time, taking into account the direction of travel of the onboard station (train), the call can also be made in zone F. As the train moves and the onboard station 100 moves from zone G to zone F, base station F-1 sends an all-line PO response request to the central control device 10 to expand the call zone to the next zone E.

[0038] The base station device 30 repeatedly transmits an all-line PO request to the onboard station device 100 at a predetermined timing. When the onboard station device 100 receives the all-line PO request, it transmits an all-line PO response. When the central control device 10 receives the all-line PO response, it registers the onboard station device 100 that transmitted the all-line PO response in the location information table 19, and transmits a designated PO request that individually specifies the onboard station device 100 to the registered onboard station device 100. When the onboard station device 100 receives a designated PO request that specifies itself, it replies with a designated PO response. The central control device 10 uses the location information table 19 to manage which base station device 30 in which zone the onboard station device 100 is located. The central control device 10 detects the movement of the onboard station device 100 by the base station device 30 that receives the all-line PO response / designated PO response.

[0039] The on-board station 100 detects a zone change by referring to the zone information included in the control information constantly transmitted from the base station 30 on the control channel.

[0040] When the central control device 10 receives the full-line PO response, it detects the movement of the train from the base station device 30 that received the full-line PO response and determines whether to expand the call zone, thereby determining whether to accept the full-line PO response request. For example, the onboard station device 100 determines whether to expand the call zone based on the travel direction information and the base station device 30 of the destination of the on-track movement. Specifically, if the destination is the base station device 30 targeted for zone expansion as expansion determination condition A, the next determination condition B determines whether the destination is the command console 40 of operator A. If a call is being made at the command console 40 of operator A, the expansion process to zone E is performed. If all conditions are met, the call zone is permitted to be expanded from zone F to zone E, and the central control device 10 sends a call zone expansion command to base station E. Base station E then begins transmitting voice data using the same call number as the zone in which the call was made. If voice data with the same call number is being transmitted in the destination zone, the onboard station device 100 continues the call using that call number.

[0041] In addition, when a call is being made at operator B's command console 70, the process of expanding the call outside of operator B's operating area (zone F, zone G) is not performed.

[0042] If the central control device 10 can accept the full-line PO response request, it sends a call zone expansion instruction to the base station E to which the call zone is to be expanded, and allows the on-board station to connect to base station E. On the other hand, if the full-line PO response request cannot be accepted, the central control device 10 does not allow the on-board station to connect to base station E.

[0043] As shown in FIG. 4, when the onboard station 100 moves during a call, whether to expand the call zone is determined based on the type of the command console 40 or command console 70 that is currently in call with the onboard station 100. Even if the onboard station 100 moves to the boundary station (zone F) between operators A and B while in call with the command console 70 of operator B, the call zone is not expanded to operator A's zone. The central control device 10 manages the onboard station 100 in each zone using a full-line PO request, and disconnects the call in zone F when the onboard station 100 leaves zone F during the call. If the onboard station 100 enters zone F, which is the operator boundary, while operator A's command console 40 is in call with the onboard station 100 in zone G, the zone is expanded based on the zone expansion determination, and the call can continue.

[0044] FIG. 5 is a sequence diagram of the console-initiated call transfer determination process of the present invention.

[0045] The command console 40 of operator A is communicating with an on-board station located in zone E via base station E-1. When the train moves and the on-board station moves from zone E to zone F, the on-board station's communication zone must be changed and command responsibility must be handed over from operator A's command console 40 to operator B's command console 70.

[0046] The command console 40 of operator A sends a call forwarding instruction to operator B to the central control device 10. The central control device 10 sends a call forwarding request to the command console 70 of operator B. When the call forwarding response operation is performed, the command console 70 sends a call forwarding response to the central control device 10.

[0047] The central control device 10 determines whether or not to accept the transfer response. For example, it determines whether or not to transfer based on the combination of the type of the transfer destination console and the current zone. Specifically, if the transfer destination console is the command console 70 of operator B, it determines that the call can be transferred to zone G, but cannot be transferred to any zone other than zone G. For any other combination, it determines that the call can be transferred.

[0048] As shown in Figure 5, if operator B's command console 70 is on a call in zone F and transfers the call to operator A, and the command console 40 takes over the call, when operator B's command console 70 leaves the call, the call zone can be expanded to E and the call of operator A's command console 40 can be taken over.

[0049] FIG. 6 is a sequence diagram of the call forwarding determination process when a call is lost according to the present invention.

[0050] Specifically, a three-way call is being carried out between the command console 40 of operator A, the command console 70 of operator B, and the on-board station 100 located in zone G via base station G.

[0051] As defined in the system information shown in Fig. 7, the command console 70 of operator B can communicate with the onboard station equipment 100 located in zones F and G, but cannot communicate with the onboard station equipment 100 located in zone E. Therefore, when the train moves and the onboard station moves from zone G to zone F, the command console 70 of operator B ends the call, and the call transitions to a two-way call between the command console 40 of operator A and the onboard station equipment 100. Therefore, the command console 70 of operator B sends an end-of-call signal to the central control device 10.

[0052] The central control device 10 determines whether the end-of-call signal can be received. For example, the determination is made as to whether the transfer can be made based on the combination of the traveling direction of the onboard station (train), the receiving base station, and the control console 70 that will end the call. Specifically, if the transfer response console is the control console 70 of operator B, transfer to zone E other than zone G is not possible, so the central control device 10 determines that the end-of-call signal can be received.

[0053] If the central control device 10 can receive the call-off signal, it sends an instruction to expand the call zone to the base station E and allows the on-board station to connect to the base station E. On the other hand, if the call-off signal cannot be received, the central control device 10 changes the command console 40 to the zone E, zone F, or zone G in use.

[0054] FIG. 7 is a diagram showing an example of system information for determining the call zone of a carrier according to the present invention.

[0055] In the system information shown in Fig. 7, zones A to E are zones operated by operator A, zone F is a zone operated jointly by operators A and B, and zone G is a zone operated by operator B, but is also defined as a zone in which operator A can operate. For this reason, as mentioned above, zones F and G are determined to be usable sections for operator B, and operator B's control console can only make calls in areas with operator identification 1 or 2. As shown in Fig. 1, base station F in zone F is implemented in central control device 10 of operator A, and base station G in zone G is implemented in extension unit 20 of operator B.

[0056] FIG. 8 is a diagram showing an example of a table that holds information about the command console 70 of the present invention.

[0057] As shown in the figure, the console ID is composed of a combination of the operator ID in the upper byte and the console number in the lower byte. Console IDs are defined for the seven consoles 40 of operator A and the two consoles 70 of operator B.

[0058] Up to this point, an example in which one zone is configured by one base station device 30 has been described, but hereafter, an example in which one zone is configured by multiple base station devices 30 will be described.

[0059] FIG. 9 is a diagram showing an example of zone movement accompanying a train's travel in the present invention.

[0060] In the direction of travel 10, the identification number K05101 / 10 is the on-board station 100 in the first car (driver's side) of the 001 train, and the identification number K05101 / 01 is the on-board station 100 in the last car (conductor's side) of the 001 train.

[0061] In state 1, on-board station K05101 / 10 and on-board station K05101 / 01 are in communication with base station A-2 in zone A.

[0062] In state 2, the train is running and the onboard station K05101 / 10 of the first car enters the range of base station A-3 at the boundary with zone B, resulting in active calls in zones A and B. To determine zone expansion, system information is defined, including the identification information of the base station 30, the direction of travel of the onboard station 100, and route information, which serve as triggers for determining zone expansion or narrowing. The central control device 10 refers to the system information to determine zone expansion or narrowing.

[0063] In state 3, the train is running, and onboard station equipment K05101 / 10 and onboard station equipment K05101 / 01 enter the range of base station B-1 in zone B, resulting in calls being active in zones A and B. Zone reduction is determined in the communication area of ​​the base station equipment 30 next to the zone boundary, so the adjacent call zone is also maintained at the boundary base station B-1 of the adjacent zone.

[0064] In state 4, the zone reduction determination is triggered when the onboard station K05101 / 10 of the first car enters the range of base station B-2, which is next to base station B-1 at the boundary with zone A. At this time, there is no onboard station 100 in a call in zone A, and the direction of travel is away from the boundary base station B-1 and toward base station B-2 (travel 10), so the busy zone is reduced and the state becomes a busy state in zone B.

[0065] FIG. 10 is a diagram showing another example of zone movement accompanying a train's travel in the present invention.

[0066] State 1 and state 2 are the same as in FIG.

[0067] In state 5, the train is moving and the onboard station equipment K05101 / 10 of the first car is within the range of base station B-1 in zone B, while the onboard station equipment K05101 / 01 of the last car remains within the range of base station A-3 in zone A, so calls are in progress in both zones A and B.

[0068] In state 6, the train is moving and the onboard station equipment K05101 / 10 of the first car enters the range of base station B-2 in zone B, while the onboard station equipment K05101 / 01 of the last car remains within the range of base station A-3 in zone A. The onboard station equipment K05101 / 10 of the first car enters the range of base station B-2, the next base station after the boundary base station B-1, which triggers a zone reduction judgment, but because the onboard station equipment K05101 / 01 of the last car remains within the range of base station A-3 in zone A, calls are maintained in both zones A and B.

[0069] In state 7, the train is moving and the onboard station device K05101 / 10 of the first car enters the range of base station B-2 in zone B, and the onboard station device K05101 / 01 of the last car enters the range of base station B-1 in zone B. Since the onboard station device 100 entering the range of the boundary base station B-1 does not trigger a zone reduction determination, the active call state is maintained in zones A and B.

[0070] In state 8, the train is moving and onboard station equipment K05101 / 10 and onboard station equipment K05101 / 01 enter the range of base station B-2 in zone B. The zone reduction determination is triggered when onboard station equipment K05101 / 01 of the last car enters the range of base station B-2, the next station after base station B-1 at the boundary with zone A. At this time, there are no onboard station equipment 100 in use in zone A, and the direction of travel is away from border base station B-1 and toward base station B-2 (travel 10), so the busy zone is reduced and the state becomes one of a busy zone in zone B.

[0071] As described above, the wireless communication system of the embodiment of the present invention includes a plurality of base station devices 30 arranged along a predetermined route traveled by a mobile station (on-board station device 100), a communication control device (central control device 10) that controls communication between the base station devices 30 and the mobile station, and a plurality of command consoles (command console 40, command console 70) that communicate with the mobile station. The communication control device determines the command console (command console 40, command console 70) that can communicate with the mobile station based on the location of the mobile station, allowing wireless communication to continue even across a boundary station between different operators to which the same frequency is assigned. Furthermore, operator A, who has received delegation command from operator B, can continue command operations across operator boundaries. Operator B, who cannot delegation command, is restricted to calls within a designated area. This allows for the construction of a flexible wireless communication system that meets customer system requirements.

[0072] The present invention is not limited to the above-described embodiments, but includes various modifications and equivalent configurations within the spirit and scope of the appended claims. For example, the above-described embodiments have been described in detail to clearly explain the present invention, and the present invention is not necessarily limited to configurations including all of the described configurations. Furthermore, part of the configuration of one embodiment may be replaced with the configuration of another embodiment. Furthermore, the configuration of another embodiment may be added to the configuration of one embodiment. Furthermore, part of the configuration of each embodiment may be added, deleted, or replaced with other configurations.

[0073] Furthermore, the aforementioned configurations, functions, processing units, processing means, etc. may be realized in part or in whole in hardware, for example by designing them as integrated circuits, or may be realized in software by a processor interpreting and executing a program that realizes each function.

[0074] Information such as programs, tables, and files that realize each function can be stored in a storage device such as a memory, a hard disk, or an SSD (Solid State Drive), or in a recording medium such as an IC card, an SD card, or a DVD.

[0075] In addition, the control lines and information lines shown are those that are considered necessary for the explanation, and do not necessarily show all the control lines and information lines that are necessary for implementation. In reality, it can be considered that almost all components are interconnected. [Explanation of symbols]

[0076] 1 Base station equipment 10 Central Control Unit 11 Exchange control unit 12 Call control section 13 Clock board 14 HUB board 15 Base Station Interface 16 console interface 17 Recording Interface 18 Railway Telephone Interface 19 Area Information Table 20 Extension 24 HUB board 25 Base Station Interface 26 Console Interface 27 Recording Interface 28 Railway Telephone Interface 30 Base station equipment 40 Command console 50 Command console call recording device 60 Railway telephone exchange for operator A 70 Command console 80 Railway telephone exchange for operator B 90 Command console call recording device 100 Onboard station equipment

Claims

1. 1. A wireless communication system, comprising: a plurality of base stations arranged along a predetermined route traveled by a mobile station; a communication control device that controls communication between the base station and the mobile station; a first control console managed by a first operator and communicating with the mobile station; a second control console managed by a second operator and communicating with the mobile station; the plurality of base stations define a communication range with the mobile station on the first operator side, forming a first zone including a boundary between the first operator and the second operator, and a communication range with the mobile station on the second operator side, forming a second zone including a boundary between the first operator and the second operator; The communication control device determining a control console that can communicate with the mobile station according to a zone in which the mobile station is located and a type of the control console; Controlling communication between the mobile station and the determined command console so that it is performed in units of the zone; A wireless communication system characterized in that, when the mobile station is in a call with the first command console or the second command console and reaches either the second zone from the first zone or the first zone from the second zone before crossing the boundary between the first operator and the second operator, whether to continue the call between the mobile station and the command console across zones is determined depending on the type of the command console.

2. 2. The wireless communication system according to claim 1, each of the first zone and the second zone includes a plurality of communication areas formed by the base station; A wireless communication system characterized in that, when the mobile station is in a call with the first command console or the second command console, if the mobile station reaches either a communication area adjacent to the first zone or a communication area adjacent to the second zone before crossing the boundary between the first operator and the second operator, the communication control device determines whether to continue the call between the mobile station and the command console across zones depending on the type of the command console.

3. 2. The wireless communication system according to claim 1, A wireless communication system, characterized in that the first operator and the second operator are assigned the same frequency for communication between the mobile station and the base station.

4. A wireless communication method performed by a wireless communication system, The wireless communication system includes a plurality of base stations arranged along a predetermined route along which a mobile station moves, a communication control device that controls communication between the base stations and the mobile station, a first command console that is managed by a first operator and communicates with the mobile station, and a second command console that is managed by a second operator and communicates with the mobile station, the plurality of base stations define a communication range with the mobile station on the first operator side, forming a first zone including a boundary between the first operator and the second operator, and a communication range with the mobile station on the second operator side, forming a second zone including a boundary between the first operator and the second operator; The wireless communication method includes: determining a control console that can communicate with the mobile station according to a zone in which the mobile station is located and a type of the control console; Controlling communication between the mobile station and the determined command console so that it is performed in units of the zone; A wireless communication method characterized in that, when the mobile station is in a call with the first command console or the second command console and reaches either the second zone from the first zone or the first zone from the second zone before crossing the boundary between the first operator and the second operator, whether to continue the call between the mobile station and the command console across zones is determined depending on the type of the command console.

Images