JPH10336092A - Mobile communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow the system to establish mobile communication over a wide range efficiently in a short time by allowing the system to have road-vehicle communication and inter-vehicle communication to realize automatic drive and vehicle-group drive. SOLUTION: In this system, a continuous radio communication link (road-vehicle communication) 4 (4a-4c) is realized between vehicle mobile stations 10 (10a-10c) driving on an automobile road such s a highway and base stations 12 (12a-12c) installed on the highway and direct radio communication links (inter-vehicle communication) 2 (2a, 2b) are realized between the mobile stations. The mobile station 10 is provided with an upper transmitter-receiver 13 to set the radio communication link 4 between the base stations 12, a front transmitter-receiver 14 (14a-14c) that sets the radio communication link 2 between itself and the mobile station of other vehicle driving in front of itself, and a rear transmitter-receiver 16 (16a-16c) that sets the radio communication link 2 between itself and the mobile station of other vehicle driving at the back of itself. Plural base stations 12 for radio communication with the mobile station 10 are placed on a road almost at a prescribed interval in a direction of lanes and the base station 12 is provided with a transmitter-receiver 18 to set a radio communication link with each mobile station 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a mobile communication system, and more particularly, to a mobile station device, a fixed control station device, a recording medium storing a mobile communication control program, and a mobile communication method. The present invention can be applied to a mobile communication system for performing road-to-vehicle communication and vehicle-to-vehicle communication over a wide network.

[0002]

2. Description of the Related Art Conventionally, as a system for providing a communication path between a vehicle and a roadside communication network, Kitsuo Tachikawa et al., "ITS
Road-to-Vehicle Communication and Vehicle-to-Vehicle Communication Technology that Supports `` Oki Electric R & D, July 1996, No.171, Vol.63, No.3, pp.63-68. Road-to-vehicle communication and continuous communication-type road-to-vehicle communication using a leaky coaxial cable (LCX) have been proposed.

In the spot communication type road-vehicle communication system, a spot-like radio wave or light wave beacon is provided at a certain interval on a road, and communication is performed intermittently when an automobile passes under the beacon. .

[0004] The continuous communication type road-vehicle communication system lays a leaky coaxial cable on the road side and provides a continuous wireless communication path between the cable and an antenna installed in the vehicle.

[0005] In order to provide a communication path between vehicles, there is an inter-vehicle communication proposed in the above-mentioned literature. This is a system that forms a wireless communication link between vehicles running close to each other and enables direct information transmission between the vehicles.

[0006]

However, the spot communication type road-vehicle communication system is difficult to apply to automatic driving and vehicle group driving due to intermittent communication. In addition, in the continuous communication type road-vehicle communication system using the leaky coaxial cable, continuous communication is realized in one section, but communication is temporarily stopped at the boundary of the section,
It does not have sufficient characteristics for realizing automatic driving and vehicle group driving.

[0007] Further, in order to realize vehicle group traveling, it is necessary to integrate roadside-vehicle communication and vehicle-to-vehicle communication and operate them integrally. Conventional road-vehicle and vehicle-to-vehicle communication systems are individually operated. It does not have sufficient characteristics for the practical use of a vehicle group.

In view of the above, in order to realize automatic driving and vehicle group driving, road-to-vehicle communication and vehicle-to-vehicle communication are combined so that mobile communication over a wide area can be performed efficiently and in a short time. There is a demand for a system that can do this.

[0009]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a mobile station apparatus capable of performing packet communication with either a fixed base station apparatus or another mobile station apparatus as required, and a fixed wireless zone. A fixed base station that performs packet communication with mobile stations in the fixed wireless zone; and a fixed control that performs packet communication with a plurality of fixed base stations and manages the presence of the mobile station and performs packet communication control. Packet transfer means (for example, a packet transfer network,
(1) the mobile station device generates a data packet,
Relaying and exchanging to the intended route, including packet transmitting and receiving means for transmitting and receiving the data packet, (2)
The fixed control station device manages mobile station devices existing in each wireless zone of each fixed base station device, identifies mobile station devices existing in the wireless area of the own control station, and determines whether the mobile station device exists in the own control station. Mobile station management means for identifying a mobile station apparatus which is initially registered and registered as a home address and managing a destination address of the mobile station apparatus, and a mobile station management means for transferring a transfer route for input / output data packets And packet relay / exchange means for relaying / exchanging input / output data packets to / from the packet transfer means or the fixed base station apparatus as necessary.

By adopting such a configuration, for example,
When a data packet is transmitted from a first mobile station device to a destination second mobile station device, the data packet is received by a first fixed base station device, and transmitted from the first fixed base station device to a first fixed control station device. Sent to From here, it is sent to the second fixed control station device registered as the home address of the destination second mobile station device. The destination address of the second mobile station device of the destination registered in the second fixed control station device can be confirmed, and the data packet is transferred to the third fixed control station device of this destination address. Is done. The source address is registered in the destination third fixed control station apparatus, and the presence of the destination second mobile station apparatus is confirmed. When the presence is confirmed, the destination is transferred to the second fixed base station device in the wireless zone where the second mobile station device of the destination exists, and the second mobile station of the destination is transmitted from the second fixed base station device. The device can be called.

[0011] Further, when packet transmission from the first mobile station apparatus to the first fixed base station apparatus cannot be established due to shadowing between the mobile station and the fixed base station, etc.
By making the first fixed base station apparatus receive the signal from the first mobile station apparatus via another mobile station apparatus, packet communication can be established.

Further, when a response packet is generated and transmitted by the destination second mobile station device, it is received by the second fixed base station device, transferred to the third fixed control station device, and registered. When the source address is confirmed and transferred directly to the first fixed control station device of the source address, and when the presence of the first mobile station device is confirmed by the first fixed control station device of the source address, The response packet is notified to the first mobile station device of the source address.

As described above, it is possible to quickly perform packet communication between mobile station apparatuses of different fixed control station apparatuses via road-vehicle communication and inter-vehicle communication.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of the present invention will be described with reference to the drawings. Therefore, in this embodiment,
With the aim of realizing an information and communication infrastructure that is commonly used for vehicle group driving, automatic driving, provision of driving environment information, danger warning service, etc., required for future highways, vehicles running on roads At the same time as transmitting information (road-to-vehicle communication) with the roadside fixed communication network, information transmission between traveling vehicles (inter-vehicle communication) and road-to-vehicle communication by detour relay using inter-vehicle communication are also realized. A mobile communication system is configured.

The schematic configuration of the mobile communication system of this embodiment is as follows. That is, (1) in a mobile communication system that provides a wireless communication path for performing information communication between a mobile station mounted on a vehicle traveling on a road and a fixed communication network installed on the roadside, Net
First to perform wireless communication for transmitting and receiving data packets with mobile stations
A base station having a transceiver and a control station connecting a plurality of base stations and a backbone communication network interconnecting a plurality of control stations (for example, an ATM switching network, a frame relay switching network, a data switching network, a dedicated line switching network, etc.) ).

The mobile station has a first transceiver and a second transceiver for performing wireless communication for transmitting and receiving data packets. The control station statistically processes the position information of the mobile station obtained from the position information source and an application system that provides various information services at the request of the end user, and performs wireless communication with the mobile station based on the result. A vehicle tracking system that makes a decision to switch between a base station, a control station, and an application system;
A router that controls the route of data packets between the base station, the application system, and the backbone communication network. The router has an address table indicating the correspondence between the home address of the mobile station and the destination address, determines the destination address of the data packet using the address table, and updates the address table with the vehicle tracking system. It is configured to perform based on the output.

(2) Further, the mobile station includes a first transceiver,
A second transceiver that performs wireless communication for transmitting and receiving data packets, third and fourth transceivers that perform wireless communication for transmitting and receiving data packets to and from transceivers of other mobile stations, and a destination or source of the data packet And a first router for controlling the route of a data packet between the first, second, and third transceivers and the terminal device.

The control station statistically processes the position information of the mobile station obtained from the position information source and an application system for providing various information services at the request of the end user, and based on the result, the mobile station and the radio station communicate with each other. A vehicle tracking system for making a decision to switch between a base station, a control station and an application system for communication, an application system, a backbone communication network and a third
A second router for controlling the route of data packets to and from a router of the same type and a sub-router corresponding to a group of mobile stations belonging to one vehicle group, and this sub-router is owned by each mobile station of the group of mobile stations. It is configured to have a third router that performs path control of data packets between these mobile stations and between these mobile stations and the second router based on path information common to the first router.

(3) Further, the vehicle tracking system is configured to generate or eliminate a tracking filter for tracking the position of each mobile station based on the position information of the mobile station. (4) Further, the third router generates a sub-router that handles the mobile station group based on the position information of the mobile station group, corresponding to the mobile station group belonging to one vehicle group, and Or make it disappear.
(5) Further, the vehicle group is configured to be determined based on the output of the vehicle tracking system. (6) Further, the configuration is such that the change of the assignment of the communication channel to the mobile station is performed based on the output of the vehicle tracking system.

FIG. 1 is a configuration diagram showing the relationship between a control station, a base station, and a vehicle mobile station as an example of the mobile communication system of the present embodiment. In FIG. 1, the mobile communication system includes mobile stations 10a, 10a of a vehicle running on a motorway such as a highway.
b, 10c and a continuous radio communication link (road-vehicle communication link) 4a, 4b,
4c, and a direct wireless communication link (inter-vehicle communication link) 2a, 2b between mobile stations.

An upper transceiver for establishing a radio communication link 4a, 4b, 4c between the mobile station 10a, 10b, 10c and the base station 12a.
13a, 13b, 13c, front transceivers 14a, 14b, 14c for establishing a wireless communication link 2a, 2b with a mobile station of another vehicle ahead,
Rear transceivers 16a, 16b, 16c are provided for establishing wireless communication links 2a, 2b with mobile stations of other vehicles behind.

On the road side, these mobile stations 10a, 10b,
In order to perform wireless communication with 10c, a plurality of base stations 12a, 12b to 12
n are installed at almost constant intervals in the lane direction, and the base station 12
a is a wireless communication link 4a, 4b between the mobile station 10a, 10b, 10c.
A transmitter / receiver 18 for setting b and 4c is provided. The transceiver 18 is provided with an antenna as a radio wave radiator.

FIG. 2 is an overall system diagram of the mobile communication system in the present embodiment. The base station 12a forms one radio zone, and establishes radio communication links 4a to 4n with the mobile stations 10a to 10n existing in the radio zone. The base station 12a is connected to a control station 15a via a wired or wireless transmission path 6a. One control station 15a forms one continuous wireless area connecting wireless zones formed by a plurality of base stations 12a to 12n connected thereto. Further, a plurality of control stations 15a to 15n
Interconnected with 0. By connecting the wireless areas of the control stations 15a to 15n, a continuous communication service area can be realized on a long-distance highway, and continuous communication can be realized in this area. In addition, the interference of radio waves between wireless zones can be avoided by a method similar to that of a system employed in ordinary mobile wireless communication using a cellular system.

FIG. 3 is a functional configuration diagram of the mobile station 10 of the present embodiment. In FIG. 3, a mobile station 10 has a front transceiver 14 for communicating with a mobile station ahead, an upper transceiver 13 for communicating with a base station, and a mobile station 10 for communicating with a mobile station behind. Rear transmitter / receiver 16 and terminal device for automatic driving
22a, a terminal device 22b for information retrieval, and a router 20 for performing necessary packet exchange between these terminal devices and the transceiver.

The router 20 is a level 1 router, and plays a role of controlling a route in a subnetwork. The upper transceiver 13 establishes a wireless communication link 4 with the transceiver 18 of the base station 12 to transmit and receive data packets. The front transceiver 14 transmits and receives data packets by establishing a wireless communication link 2 with the rear transceiver 16 of another vehicle ahead. The rear transceiver 16 establishes the wireless communication link 2 with the front transceiver 14 of another vehicle behind and transmits and receives data packets.

FIG. 4 is a functional configuration diagram of the base station 12 of the present embodiment. In FIG. 4, the base station 12 includes a transceiver 18 for communicating with the mobile station 10 and a network connection device 24 for communicating with the control station 15. The network connection device 24 is connected to the transmission line 6
Connected to the control station 15 through the upper transceiver of the mobile station 10.
The data packet transmitted from 13 and received by the transceiver 18 is transmitted to the control station 15. Conversely, the data packet transmitted from the control station 15 is transmitted to the upper transceiver 13 of the mobile station 10 through the network connection device 24 and the transceiver 18.

FIG. 5 is a functional block diagram of the control station 15 of this embodiment. In FIG. 5, a control station 15 includes a vehicle tracking system 31 that tracks the mobile station 10, a base station switch 34 that performs line connection control with the base station 12, and a mobile station that controls the exchange of data packets with the mobile station 10. A router 33, an application system 35 such as a road traffic information system, and a backbone communication network 200.
And a router 32 that controls the exchange of data packets with the vehicle tracking system 31, the mobile router 33, the application system 35, and the like.

The vehicle tracking system 31 tracks the position of the mobile station 10, detects the timing at which the mobile station 10 crosses the boundary between the wireless zone and the wireless area, and starts processing such as handover. For this reason, the vehicle tracking system 31
Tracking filters 32a to 32n for tracking 10 and mobile stations
Location database 311 for managing 10 locations, and base station 12
Zone database that records the boundaries of different wireless zones
312, a wireless area database 313 that records the boundaries of the wireless area of the control station 15, a base station database 314 that manages the mobile station 10 connected to the base station 12, and a vehicle group database 315 that manages the vehicle group. And a communication / processing control program for managing these databases, processing a tracking filter, and communicating with the router 32.

The router 32 is provided with a communication control program for exchanging data packets between systems such as the vehicle tracking system 31, the mobile router 33, and the application system 35. The mobile router 33 has a vehicle group table 331 and generates sub-routers 33a to 33n corresponding to the vehicle group. These sub-routers 33a to 33n perform communication control programs for controlling the route of data packets in the vehicle group. It is comprised including.

The base station switch 34 is connected to a plurality of base stations 12a to 12n via transmission paths 6a to 6n, and selects one of the base stations 12a to 12n according to a command from the mobile router 33. To connect to the mobile router 33. Application system
35 has a database for providing various information services according to the request of the end user. The backbone communication network 200 is a data exchange network for interconnecting a plurality of control stations 15a to 15n.

FIG. 6 is a configuration diagram of a network address of a data packet that is route-controlled in the router 32 and the mobile router 33 according to the present embodiment. In FIG. 6, a network address is a control station 15 first registered in an individual system (eg, mobile station 10, server, fixed terminal, etc.) represented by the address, which is called a home control station. Home address HAD indicating 15 positions,
The mobile station 10 includes an individual address KAD for identifying a mobile station address, a server address, a fixed terminal address, and the like, and a destination address IAD indicating the position of the control station 15 to which the mobile station 10 has moved.

Each individual system (eg, mobile station 10, server, fixed terminal, etc.) is first registered with any control station 15 (home control station) and has a fixed home address HAD. The individual address KAD is also fixed.

On the other hand, the destination address IAD changes as the mobile station 10 moves. The originator of the data packet is the home address HAD and the individual address KAD in the destination address.
Is specified, the destination address IAD is appropriately filled in the mobile communication system, and the data packet is delivered to the destination. The router 32 of the control station 15 shown in FIG. 5 is provided with an address table 32a indicating the correspondence between these addresses. For a data packet whose destination address and destination address among source addresses are undetermined, The destination address IAD is determined using the address table 32a. This process is called “address resolution”.

FIG. 7 shows a router 32 in the control station 15 of this embodiment.
21 is a flowchart showing a method for registering a mobile station address in the address table 32a of FIG. In FIG. 7, an address table
To register the mobile station address in 32a, first, mobile station A
Is newly connected to the mobile communication system (step S20), the address of the mobile station A is registered in the address table 32a of the connected control station 15 and the home control station 15a of the mobile station A (step S20). Step S30). Next, when the mobile station A moves to the control station 15 ahead in the traveling direction (step
S32), the address of the mobile station A is registered in the address table 32a of the forward control station 15 (step S34).

Further, when new address information is included in the destination address and the source address included in the data packet passing through the router 32 (step S15).
), The new address information to the control station 15 router 3
It is registered in the address table 32a of Step 2 (Step S25).

FIG. 8 is a data flow diagram of the vehicle tracking system 31 of the present embodiment. In FIG. 8, a rectangular block indicates an external system connected to the vehicle tracking system 31, a circular block indicates a process, two horizontal parallel lines indicate a data store, and an arrow indicates a data flow. Here, the location information source 30 provides location information of the mobile station 10, and includes, for example, a base station having a location measurement function of the mobile station 10, a mobile station having a location measurement function such as a GPS receiver, and the like. Show.

In the process P1, the vehicle tracking system 31 corresponds to each mobile station 10 to store the position information 30 of the position information source 30.
A tracking filter is calculated from the tracking control parameter 1 and the tracking filter parameter 302 from the vehicle tracking system 31 of the rear control station 15. FIG. 9 is a diagram showing a flow of processing for obtaining the tracking filters 32a to 32n of the present embodiment. In FIG. 9, first, a tracking filter is generated for each mobile station (step S31), and the position information 301 from the position information source 30 is input to the tracking filter (step S34). The tracking filter calculates the instantaneous position and speed of the mobile station 10 by a statistical processing method such as a polynomial filter (step S37), and records the calculation result in the position database 311 (step S40).

Next, in the process P2 in FIG. 8, the contents of the location database 311 are compared with the contents of the zone database 312 storing the boundaries of the respective radio zones, and it is expected that each mobile station 10 will cross the boundaries of the radio zones. Time, and the result (zone switching signal 303) is transmitted to the base station switch 34.
Output to

Next, in the process P3, the result (zone name signal 304) is compared with the contents of the wireless area database 313 indicating the boundary of the wireless area of the control station 15, and the control station 15
Is determined. If the control station switching is determined, the address table 32 of the router 32 of the own station (the control station 15 to which the vehicle tracking system belongs) and the home control station 15 is provided.
a, the destination address IAD of the mobile station 10 is changed to the address of the forward control station (control station to be switched) 15 (AMT
(Moving target address) update 305,306) and forward control station 15
Add the registration of the mobile station to the address table of router 32 (AM
T added 307) and the backward control station (the control station 15 before this station)
The registration of the mobile station is deleted from the address table 32a of the router 32 (AMT deletion 308), and the control station is switched (309). In process P4, handover of the tracking filter to the forward control station (parameter of the tracking filter) is performed. Class 31
0 to allow the action to take over).

When the vehicle tracking system 31 determines that control station switching is to be performed in the process P3, the process P5, based on the control station name 316, uses the boundary information at this time in the service area of each application system. Is compared with the contents of the service area database 35a of the application system 35 representing the boundary of the application system 35, and a determination of switching to the application system 35 is made. .

Further, in the process P6, based on the contents of the position database 311, it is considered that mobile stations existing at close distances constitute a vehicle group, and the vehicle group ID is assigned to the mobile station 10 belonging to the vehicle group. Then, the mobile station 10 running at the head of the vehicle group is marked, and the result is recorded in the vehicle group database 315. The contents of this vehicle group database 315
To the mobile router 33.

Further, in the process P7, radio wave resources are managed. FIG. 10 is a process flowchart for managing radio wave resources in the present embodiment. In FIG. 10, first, based on the contents of the location database 311 and the channel number 318 obtained from the base station switch 34, a search is made for a base station to which the mobile station 10 using the same channel is connected ( Step S52), the distance between the base stations is obtained (step S54), and the coherence of the radio wave is estimated (step S5).
6) If the interference is expected to exceed the allowable limit, a channel change 319 is determined (step S58), the determination result is recorded in the base station database 314 (step S60), and the base station switch 34 is changed. (Step S62
).

Next, the operation of the mobile communication system according to the present embodiment will be described with reference to FIGS. First, when the mobile station 10 exists in the wireless zone formed by the base station 12, the mobile station 10 establishes a wireless communication link 4 with the base station 12 and the control station 15 through the base station 12 and the transmission path 6. Mobile router 33 through base station switch 34
Connected to.

In the mobile router 33, sub-routers 33a to 33n generated corresponding to each vehicle group and having a route control function are provided.
And these sub-routers 33a to 33n perform the function of packet switching. Also, these sub-routers 33a to 33n
Is a communication comprising a wireless communication link 2 connecting the mobile stations belonging to the vehicle group, a wireless communication link 4 connecting the mobile stations 10 and the base station 12, and a transmission line 6 connecting the base station 12 and the control station 15. It plays the role of a level 2 router (which performs route control between sub-networks and within sub-networks) for a network (this is called a "vehicle group sub-network"). On the other hand, the router 20 in the mobile station plays a role of performing a route control in the sub-network as a level 1 router.

The sub-router 33a and the router 20 of the mobile station 10 belonging to the corresponding vehicle group are connected to the OSPF (Open Short
A link status packet (Link Status Packe) that indicates the connection status of the communication link within the vehicle sub-network using a normal routing protocol such as est Path First.
Communicate t). When the link state packet reaches the sub-network, the sub-router 33a of the control station 15 and the router 20 of the mobile station 10 execute the path control in this sub-network, and the data packet is transmitted through the optimal path to the destination mobile station. The information is delivered to a higher-level system through the ten terminal devices 22, the system in the control station, or the backbone communication network 200.

When the road-to-vehicle communication link of a certain mobile station 10 is interrupted due to shadowing by a large vehicle or the like traveling ahead, the connection status is reflected in the link status packet, and the mobile station in the vehicle group is reflected. 10 routers 20 and control stations
The information is transmitted to the 15 mobile routers 33, and the route control function of these routers automatically performs a bypass relay via another mobile station 10.

The mobile router 33 of the control station 15 includes
A vehicle group table 331 indicating the vehicle group to which the vehicle belongs. In the vehicle group table 331, information sent from the vehicle group database 315 of the vehicle tracking system 31 of the control station 15 is written. If the destination address of the input data packet indicates the own control station 15, the router 32 of the control station 15 sends the data packet to the mobile router 33 of the control station 15. The mobile router 33 looks up the vehicle group table 331 to find the vehicle group to which the destination mobile station 10 belongs, and sends this data packet to the mobile station through the base station switch 34 according to the route control of the sub-router 33a corresponding to this vehicle group. To send out.

The base station switch 34 of the control station 15 is provided with a base station table 341 indicating a base station number (ID) and a channel number to which each mobile station 10 is connected. The channel is switched with the destination base station 12 of the data packet transmitted from the mobile router 33 according to the contents of the table 341. If the mobile station 10 has moved from one wireless zone to the border with an adjacent wireless zone, the control station 15 will use a vehicle tracking system.
31 sends a zone switching command to the base station switch 34. The base station switch 34 is used for the mobile station 10 in the base station table 341.
Rewrite the base station number (ID) corresponding to. By this processing operation, handover (switching of the base station 12) between base stations under the control of the same control station 15 can be realized. Note that the assignment of the channel to the mobile station 10
The result is written in the channel number column of the base station table 341 of the base station switch 34.

When the mobile station 10 is newly connected to the mobile communication system, the address table 32a of the connected control station 15 (own station) and the router 32 of the home control station 15 is stored in the address table 32a. Register an address. As a result, of the data packets transmitted to the mobile station 10, those which have reached the home control station 15 because the address resolution has not been resolved are also transferred to the mobile station 10 and delivered to the mobile station 10. That is, for example, when the mobile station 10a transmits a data packet addressed to the mobile station 10b, the (originating) control station 15a to which the mobile station 10a is connected is transmitted to the home control station 15b in which the mobile station 10b is registered. The home control station 15b transfers the data packet to the control station 15c to which the mobile station 10a is connected (originating) by referring to the address table 32a and causes the mobile station 10b to receive the data packet. At this time, the incoming control station 15
c indicates that the mobile station 10a that is the transmission source (source) is the control station 15a
When the mobile station 10b returns a response to the mobile station 10a, the mobile station 10b refers to the address table 32a to
To the mobile station 10a.

As described above, the address of the transmission source is registered in the address table 32a of the router 32 of the terminating control station 15c by the data packet passing through the home control station 15b.
The response packet addressed to the transmission source is delivered directly to the transmission control station 15a. In addition, the transmission control station 15a
Since the address of the mobile station 10b is registered in the address table 32a of the router 32 of the
The data packet sent to b is delivered directly to the terminating control station 15c without passing through the home control station 15b.

When the mobile station 10 moves to the boundary of the radio area of the control station 15, the vehicle tracking system 31 updates the address table 32a to the router 32 of the own control station 15 and the router 32 of the home control station 15. And the addition of the registration to the address table 32a to the router 32 of the forward control station 15
The 15 routers 32 are instructed to delete the registration from the address table 32a. If the mobile station 10 is the first mobile station 10 in the vehicle group, the mobile router 33 first instructs the mobile router 33 of the forward control station 15 to generate a sub-router 33a that handles this mobile station 10, and then The connection of the mobile station 10 with the base station 12 is sent to the base station 12 of the forward control station 15 and the base station switches of both control stations 15 are connected.
Switching is performed by rewriting the base station table 341 of 34.

If it is determined that the mobile station 10 is not the first mobile station 10 of the vehicle group, the mobile station is sent from the original sub-router 33a to the sub-router 33a generated in the forward control station 15.
At the same time, the base station 12 is switched in the same manner as described above.

The router 32 of the control station 15 sends the mobile station 10 to the destination control station 15 of the mobile station 10 registered in the address table 32a and the control station 15 to which the fixed terminal belongs.
To update the destination address of. Similarly, the router 32 of the home control station 15 also sends the destination of the mobile station 10 to the destination control station 15 of the mobile station 10 registered in the address table 32a and the control station 15 to which the fixed terminal belongs. Instruct the address to be updated.

By the above processing operations, two level 2 routers handling one vehicle group sub-network across the wireless area are generated, a handover across the wireless area is realized, and the own control station 15, home control station 15, The data packet delivered to the control station 15 registered in the address table 32a is transferred to the forward control station 15 and delivered to the mobile station 10.

In parallel with this, if it is determined that it is necessary,
The application system 35 is switched. When all the mobile stations 10 belonging to the vehicle group have passed the boundary of the wireless area, the original sub router 33a is extinguished.

When the mobile station 10 is disconnected from the mobile communication system, the registration of the mobile station 10 is deleted from the address tables 32a of all the routers 32. If there is a possibility that interference may occur in the channel being used as the mobile station 10 moves, the channel to the mobile station 10 is controlled using the radio wave resource management function of the process P7 of the vehicle tracking system 31 of the control station 15. Change the assignment.

As described above, according to the present embodiment, the mobile station
Since the location information of the mobile station 10 is statistically processed by the tracking filter, the location of the mobile station 10 can be accurately estimated, and the future location can be predicted. Switching can be performed accurately and without delay. Further, an address table 32a is provided in the router 32 of the control station 15, and a base station switch 34 is provided in the base station switch 34.
1, the switching of the control station 15 is realized by updating the address table 32a, and the switching of the base station 12 is realized by rewriting the base station table 341.Thus, even when the mobile station 10 moves at high speed on the road, Thus, information communication (road-vehicle communication) between the base station 12 and the mobile station 10 can be provided continuously without interruption over a long distance.

Further, since the address of the mobile station 10 can be designated by a fixed home address irrespective of the destination, the message can be delivered to the mobile station 10 irrespective of the movement.
Further, the application system 35 can be developed without being conscious of movement, and the development efficiency of the application system 35 can be improved.

Further, since information communication between mobile stations (for example, inter-vehicle communication) is provided integrally with road-to-vehicle communication, information transmission with low delay between mobile stations can be realized. Even when the mobile station 10 cannot establish a road-to-vehicle communication link with the base station 12 due to shadowing by a large vehicle, the mobile station 10 communicates with the control station 15 by detour relay via another mobile station 10 using the inter-vehicle communication link. Can be secured, and the reliability of communication can be greatly improved. Therefore, it can be widely and commonly applied as an information communication infrastructure on a road.

In the above embodiment, the base station installed on the road side
A system using an antenna as a radio radiator was described, but a leaky coaxial cable (LCX) was used as the radio radiator.
The same effect can be obtained by using.

In the above embodiment, the mobile station 10 is located between the mobile station 10 and the base station 12 (between road and vehicle), and the mobile station 10 is located in front of the other mobile station 10.
Between (vehicles), and mobile station 10 and other mobile stations behind
The mobile station 10 uses three transceivers to establish a wireless communication link between the mobile station 10 (between vehicles), but the first wireless communication link and the second wireless communication link are connected by one transceiver. And a second wireless communication link and a third wireless communication link.
Can be realized by one transceiver, and the first to third wireless communication links can be realized by one transceiver.

Further, in the above-described embodiment, the road-to-vehicle communication and the vehicle-to-vehicle communication are integrated and realized. However, only the road-to-vehicle communication or only the vehicle-to-vehicle communication may be independently configured.

[0063]

As described above, according to the present invention, the mobile station apparatus generates, relays, and exchanges data packets for the intended route, transmits and receives data packets, and the fixed control station apparatus It manages mobile station devices that exist in each wireless zone of the fixed base station device, identifies mobile station devices that exist in the wireless area of the own control station, and is initially registered and homed regardless of whether or not it exists in the own control station. It identifies the mobile station device registered as an address and manages the destination address of the mobile station device, determines a transfer route for input / output data packets based on the above identification and management, and if necessary, a packet transfer network. Alternatively, by configuring relay and exchange of input / output data packets to and from fixed base station equipment, road-to-vehicle communication and inter-vehicle communication are combined to realize automatic driving and vehicle group driving. , It is possible to perform mobile communications extensively efficiently yet in a short time.

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating a relationship among a control station, a base station, and a vehicle mobile station as an example of a mobile communication system according to an embodiment of the present invention.

FIG. 2 is a diagram showing an entire system of a mobile communication system in the embodiment shown in FIG.

FIG. 3 is a functional configuration diagram of the mobile station of the embodiment.

FIG. 4 is a functional configuration diagram of the base station of the embodiment.

FIG. 5 is a functional configuration diagram of a control station of the embodiment.

FIG. 6 is a configuration diagram of a network address of a data packet that is route-controlled in the router and the mobile router of the embodiment.

FIG. 7 is a flowchart illustrating an example of a method of registering a mobile station address in an address table of a router in a control station according to the embodiment.

FIG. 8 is a processing flowchart of the vehicle tracking system of the embodiment.

FIG. 9 is a diagram showing a flow of processing for obtaining a tracking filter according to the embodiment.

FIG. 10 is a flowchart showing an example of a processing flow for managing radio wave resources in the embodiment.

[Explanation of symbols]

 2, 4 Wireless communication link 10 Mobile station 12 Base station 13 Upper transceiver 14 Front transceiver 15 Control station 16 Rear transceiver 20, 32 Router

Claims (11)

[Claims] 1. A mobile station device capable of performing packet communication with either a fixed base station device or another mobile station device as required, forming a fixed wireless zone, and the mobile station within the fixed wireless zone. A fixed base station device that performs packet communication with a station device, performs a packet communication with a plurality of the fixed base station devices, includes a plurality of fixed control station devices that manages the presence of the mobile station device and performs packet communication control, A mobile communication system including packet transfer means for performing packet transfer between fixed control station devices, wherein the mobile station device performs data packet generation, relay and exchange on a target route, and The fixed control station device includes a packet transmission / reception unit configured to transmit and receive a packet, wherein the fixed control station device manages mobile station devices existing in each wireless zone of each fixed base station device, Identification of the mobile station device existing in the line area, identification of the mobile station device which is initially registered regardless of whether or not it exists in its own control station, and registered as the home address, and the destination address of the mobile station device. A mobile station managing means for performing management, and a transfer route for input / output data packets is determined by using the mobile station managing means. A mobile communication system comprising: a packet relay / exchange unit that relays / exchanges output data packets. 2. The system according to claim 1, wherein when the mobile station device moves to a wireless area of another fixed control station device, the mobile station management means of the fixed control station device performs fixed control of a destination. A mobile communication system, wherein a command is issued to a station apparatus for management and the destination address is updated. 3. A mobile station device capable of performing packet communication with either a fixed base station device forming a fixed wireless zone or another mobile station device in the fixed wireless zone, wherein the device comprises: A mobile station apparatus comprising: a packet transmitting / receiving unit that generates, relays, and exchanges packets with respect to the fixed base station apparatus or another mobile station apparatus, and that transmits and receives the data packet. 4. The mobile station device according to claim 3,
The packet transmitting / receiving means includes: a base station packet transmitting / receiving means for performing packet communication with the fixed base station apparatus; and a number of mobile stations according to a moving direction for performing packet communication with the other mobile station apparatus. Device packet transmitting / receiving means, and packet relay / exchange means for determining which of the base station packet transmitting / receiving means and the mobile station device packet transmitting / receiving means to relay / exchange data packets. A mobile station device characterized by the above-mentioned. 5. A fixed wireless zone is formed, and performs packet communication with a plurality of fixed base station devices that perform packet communication with a mobile station device in the fixed wireless zone to manage the existence of the mobile station device and perform packet communication. A fixed control station device for performing control, which manages mobile station devices that exist in each wireless zone of each of the fixed base station devices, and identifies a mobile station device that exists in a wireless area of its own control station, Mobile station management means for identifying a mobile station device which is initially registered regardless of whether or not it exists in its own control station and registered as a home address, and managing a destination address of the mobile station device; The transfer route for the data packet is determined by using the mobile station management means, and the input / output data packet is relayed / exchanged to the outside of the device or to the fixed base station device as necessary. Fixed control station apparatus characterized by comprising a packet relay-exchange means. 6. The fixed control station device according to claim 5, wherein said mobile station management means tracks and manages the position and speed of said mobile station device existing in a radio area of its own control station. Fixed control station equipment. 7. The fixed control station device according to claim 5, wherein the device further receives a data packet from the mobile station device, and a group of mobile station devices is recognized in each wireless zone. A fixed control station device comprising: a mobile station group management unit that manages the mobile station group as a mobile station group. 8. A recording medium recording a mobile communication control program for controlling packet communication between a mobile station device and a fixed control station device via a fixed base station device by a computer, the mobile communication device comprising: The control program manages the mobile station device existing in the wireless zone formed by the fixed base station device, identifies the mobile station device existing in the wireless area of the own control station, and determines whether the mobile station device exists in the own control station. Irrespective of the mobile station device which is initially registered and registered as a home address, and a mobile station management step of performing management of a destination address of the mobile station device, and a transfer route for input / output data packets. The mobile station management process is used to make a determination, and relay / exchange of the input / output data packet to the fixed base station device or another external device is performed as necessary. A recording medium storing a mobile communication control program, comprising: 9. A mobile station device capable of performing packet communication with either a fixed base station device or another mobile station device as required, and a fixed wireless zone is formed, and said mobile station within said fixed wireless zone is provided. A fixed base station device that performs packet communication with a station device, performs a packet communication with a plurality of the fixed base station devices, includes a plurality of fixed control station devices that manages the presence of the mobile station device and performs packet communication control, A mobile communication method in a mobile communication system including packet transfer means for performing packet transfer between fixed control station devices, wherein the mobile station device generates, relays, and exchanges data packets for a route intended for use. The fixed control station device includes a mobile station device existing in each wireless zone of each of the fixed base station devices. Management, identification of a mobile station device existing in the radio area of the own control station, identification of a mobile station device initially registered regardless of whether it is present in the own control station and registered as a home address, Mobile station management means for managing a destination address of a station device, and a transfer route for input / output data packets is determined using the mobile station management means, and if necessary, the packet transfer means or the fixed base. A packet relay / exchange means for relaying / exchanging the data packet to / from a station device, wherein when a data packet is transmitted from the first mobile station device to the destination second mobile station device, the first The second fixed system received by the fixed base station apparatus, sent from the first fixed base station apparatus to the first fixed control station apparatus, and registered as the home address of the destination second mobile station apparatus. The destination address of the second mobile station device of the destination registered in the second fixed control station device is sent to the third fixed control station device, and the data is transmitted to the third fixed control station device of the destination address. When the packet is transferred and the source address is registered in the third fixed control station device of the destination and the presence of the second mobile station device of the destination is confirmed, the second mobile station device of the destination is Is transferred to the second fixed base station device in the wireless zone in which the second fixed base station device exists, and the second fixed base station device
A mobile communication method characterized by receiving a call at a mobile station device. 10. The mobile communication method according to claim 9, wherein the method comprises: when packet transmission from the first mobile station device to the first fixed base station device cannot be established;
A mobile communication method, wherein the first fixed base station apparatus receives a signal from the first mobile station apparatus via another mobile station apparatus in the same wireless zone. 11. The mobile communication method according to claim 9, wherein when a response packet is generated and transmitted by the destination second mobile station apparatus, the second fixed base station apparatus transmits the response packet. Received, transferred to the third fixed control station device, the registered source address is confirmed,
The source address is directly transferred to the first fixed control station device, the existence of the first mobile station device of the source address is confirmed, and the first mobile station device of the source address is transmitted to the first mobile station device. A mobile communication method, wherein a response packet is notified.