JP4117240B2 - Wireless mobile communication system - Google Patents

Description

  The present invention relates to a wireless mobile communication system that performs wireless data communication between a mobile object, particularly a wireless mobile station mounted on a vehicle on a road, and a plurality of wireless base stations arranged on the ground, particularly along the road. It is.

Between a mobile body that travels along a road, for example, a wireless mobile station mounted on a car and an application device that provides various information via the nearest ground station (hereinafter referred to as a base station) There are mobile wireless communication systems (also called road-to-vehicle communication systems) that perform services for improving safety and comfort by performing wireless communication, for example, Intelligent Transport Systems. Are known.
In order to help understanding, in the following description, as an example, a data transceiver (for example, including a mobile phone, hereinafter referred to as a communication device) used for an automobile traveling on a road where radio base stations are arranged at appropriate intervals along the road is provided. However, it is needless to say that the mobile body of the present invention is not limited to an automobile, and the communication device is not limited to a mobile phone.
In order to help understanding, specific examples will be described as examples. For example, while a mobile is traveling in the communication range of a wireless base station installed by a communication company (Company A) that manufactures a communication device used for a wireless mobile station, in most cases, the mobile station and the base station There is no problem because of the commonality of applications. For example, when you move far away and move to a range where there is only a base station of another telecommunications company (Company B), If the communication application used by the station is not the same (compatible in terms of data handling), communication cannot be performed and services cannot be received. This is very inconvenient for the user. In addition, the size of data to be sent and received has increased within the area of one radio base station because map information, changing traffic information, weather information, movie / music / town information, etc. have increased. There is an example in which data reception is not completed while traveling. In such a case, a device for making it possible to complete reception of all data has been proposed as follows.

Non-Patent Document 1 (The Institute of Electronics, Information and Communication Engineers, ITS Study Group “Evaluation of IP handover method in DSRC network” uses IP as a network layer protocol and uses macro / micro mobility technologies such as Mobile IP and Cellular IP) Thus, a technique that enables communication across a plurality of base stations is disclosed.
However, with existing network-type protocols such as IP, it is necessary to reconfigure the network every time the mobile unit enters the communication area, so that initial connection takes time, so communication with a mobile unit that moves at high speed is required. In addition, there are problems that many in-vehicle devices are not networked, and existing network type protocols such as IP cannot always be used.

In Non-Patent Document 2 (Implementation and evaluation of mobile network platform for highly reliable communications on smart gateway), a base station management device is used for handing over communications between discontinuous narrow-area wireless areas. What performs autonomous decentralized control without having been disclosed.
However, in the autonomous distributed control, since the target value is about 100 mSec as the time until the start of communication, there is a problem that it takes time from the area entry to the start of communication, and immediate communication cannot be realized.

Further, in Patent Document 1 (Japanese Patent Laid-Open No. 2001-16160), a base station management apparatus performs broadcast communication to a plurality of base stations, and whether a target mobile station exists in its own communication area on the base station side. A technique is disclosed that makes it possible to communicate across a plurality of base stations by determining whether or not to transfer to a target mobile station.
However, the transfer to the mobile station is judged at the communication base station, and broadcast communication is used in the roadside network, so a lot of unnecessary communication occurs, and the mobile station side switches packets. Therefore, there is a problem that the configuration on the mobile station side becomes complicated.

  One method for solving these problems is to use a non-network type protocol. In the non-network type protocol, when a mobile body enters a certain communication area, it is not necessary to configure a network, so the initial connection procedure is completed in a short time. Therefore, it is suitable for implementing a service that requires immediacy such as a running service in narrow area wireless communication. In addition, since end-to-end one-to-one communication is performed, there is a merit that no unnecessary communication is generated in the roadside network.

For example, in Non-Patent Document 3 (Information Processing Society of Japan, ITS Study Group “DSRC (ARIBSTD-T75 compliant) system implementation and evaluation” (2002-ITS-10-10)), a local communication unit is provided separately from the network communication unit. A model for performing communication between local applications using a non-network type protocol has been proposed.
However, in an application using the above-mentioned non-network type protocol, communication is completed between one base station and a mobile station, and exists in a mobile station that moves between a plurality of base stations and its discontinuous communication area. Since communication cannot be passed between different applications, there is a problem in that large-capacity data cannot be transmitted / received to / from a moving body that moves at high speed, that is, there is no communication sustainability.

  On the other hand, with regard to communication connectivity, as described in Non-Patent Document 4 (Standard ARIB-STD T-75), the communication connectivity is exchanged by exchanging the functions possessed between the mobile station and the base station. What to secure is known. However, the conventional example can deal with only a single application, and there is no exchange of functions between the base station or mobile station and related devices, so there is a problem that connectivity may be lost. .

Further, Non-Patent Document 5 (Evaluation Urgent Message Transmission Performance of High Reliable Quality of Service (QoS) Method for Smart Gateways) describes an OSI Layer 2 level method that realizes preferential transmission of emergency information. However, this priority control does not consider the movement of the mobile station, which is a feature of mobile communication, and the target is emergency information and other communications, and actually considers the detailed priority for each application. There was a problem that it was impossible to do practically.
JP2001-16160 IEICE, ITS Study Group “Evaluation of IP Handover Method in DSRC Network Implementation and evaluation of mobile network platform for highly reliable communications on smart gateway Information Processing Society of Japan ITS Study Group "DSRC (ARIB STD-T75 Compliant) System Implementation and Evaluation" (2002-ITS-10-10) Standard ARIB-STD T-75 Evaluation Urgent MessageTransmission Performance of High Reliable Quality of service (QoS) Method forsmart Gateways

  Non-network-type protocol for wireless mobile communication systems between wireless base stations arranged at certain intervals along the road and wireless mobile stations that communicate while sequentially moving in the communication area of this wireless base station Is excellent from the viewpoint that various merits can be obtained. However, in a conventional wireless mobile communication system using a non-network type protocol, communication must be completed between one base station and a mobile station, and each of a plurality of base stations arranged along a road There is a problem that communication cannot be passed between the application being used and the application used by the mobile station moving between the discontinuous communication areas (continuous execution of one communication), Therefore, when the data to be transmitted / received is large-capacity data that cannot be arbitrarily disconnected in the middle, the mobile body deviates from the area during the communication, so the transmission / reception is not completed, and therefore the problem that the transmission / reception cannot be performed there were.

The present invention solves the above-described problems, uses a non-network type protocol, passes application communication between a plurality of base stations, and enables continuous communication, thereby moving the mobile body moving at high speed. The object of the present invention is to provide a wireless mobile communication system capable of transmitting and receiving a large amount of data.
In addition, even if the processing time in the application is long, such as request / response type communication, and the mobile body deviates from the communication area before the processing ends, An object is to obtain a wireless mobile communication system capable of receiving a response.

Wireless mobile communication system of the invention is mounted on a vehicle traveling road, the mobile station identification information unique in pre Me-determined predetermined protocol with radio output, transmitted in response to the mobile station identification information Mobile mobile stations that receive received application services,
A plurality of mobile stations that are installed along the road, perform wireless communication with the wireless mobile station according to the protocol, receive the mobile station identification information, and output the mobile station identification information via a second communication line. Wireless base station,
An application connected to the radio base station via the second communication line, receiving the mobile station identification information output from the radio base station, and holding the application service for providing to the radio mobile station apparatus,
A transaction management unit that is installed in the application device and divides and transmits the data of the application service, and the application service via the second communication network to the radio base station that outputs the mobile station identification information. Transfer control means for transferring the divided data ,
A transaction management unit is provided in the wireless mobile station and includes a transaction management unit that transmits reception completion to the transaction management unit of the application device after receiving all of the divided data of the application service .

According to the radio mobile communication system of the present invention, a radio base station that has received mobile station identification information among a plurality of radio base stations is responsible for communication with the radio mobile station, and is the original radio mobile station based on the identification information. Therefore, even if the mobile body travels and the communication area moves one after another, a large amount of data can be continuously transmitted and received from different base stations. Further, even when the processing time in the application is long, such as request / response communication, it is possible to receive a response from the communication partner after moving to another communication area.
Further, during execution of a plurality of applications, it is possible to interrupt the emergency information by temporarily interrupting the applications by determining the processing order based on the processing priority. In addition, in order to ensure the communication quality required by the application, a communication band required by the application can be allocated.
Furthermore, it is possible to prevent erroneous mounting and erroneous execution in the base station / mobile station due to mismatched mounting functions.

Embodiment 1 FIG.
FIG. 1 is an explanatory diagram for explaining the configuration of a radio mobile communication system according to Embodiment 1 of the present invention, and FIG. 2 is a block for explaining functional elements of each device constituting the radio mobile communication system of FIG. FIG.
A plurality of radio base stations (only the first radio base station 20 and the second radio base station 21 are shown in FIG. 1 for convenience of explanation) are installed along a certain road 100. The first and second radio base stations 20 and 21 are radio communication base stations that perform short-range radio communication such as DSRC (Dedicated Short Range Communication), and each have a communication area (first communication area) having a radius of several meters to several tens of meters. 20a, second communication area 21a). These communication areas may not be connected to each other.
As shown in FIG. 2, the mobile body 101 traveling on the road 100 includes an on-vehicle device (hereinafter referred to as a wireless mobile station 10) for communicating with the first and second wireless base stations 20 and 21 by narrow-area wireless communication. ) Is installed. For example, the on-board device includes an ETC on-vehicle device. The wireless mobile station 10 performs a transaction process (a series of operations as a whole) on a plurality (two types in the figure) of local applications (first local application 410 and second local application 411) for communication, and operations of the plurality of local applications. A data management unit 310 that performs communication with the radio base station 20 or 21 existing in the communication area, and a radio unit 110 that performs radio transmission and reception. Communication is possible with the first radio base station 20 in the communication area 20a and with the second radio base station 21 in the second communication area 21a.

In FIG. 2, the wireless mobile station 10 a and the wireless mobile station 10 b represent the same positions of the wireless mobile station 10, and the wireless mobile station 10 a is the first communication area 20 a of the first wireless base station 20. It shows what is inside. The wireless mobile station 10b represents a state in which the moving body 101 is moving (may be stopped) in the second communication area 21a of the second wireless base station 21.
The application device 30 is disposed on the road side of the road 100 or on a road management building (not shown), etc., and executes the first local application 430 and the second local application 431 to provide various services to the vehicle (for example, toll collection for highways) Information, traffic jam information, emergency notification information regarding earthquakes and disasters, etc.), and a transaction management unit 330 that performs transaction processing on the operations of the plurality of local applications, a plurality of wireless base stations, and a second communication network ( And a separate connection unit 530 that selects and communicates with a partner station to communicate with from the wireless base stations. Although the number of local applications may be larger, only two are shown here for convenience of explanation.
The first local application 430 on the application device 30 and the first local application 410 on the wireless mobile station 10 are defined between the transaction management unit 330 on the application device 30 and the transaction management unit 310 on the wireless mobile station 10. Communicate with each other using a non-network type protocol.
The second local application 431 on the application device 30 and the second local application 411 on the wireless mobile station 10 are defined between the transaction management unit 330 on the application device 30 and the transaction management unit 310 on the wireless mobile station 10. Communicating with each other using a non-network type protocol.
The non-network type protocol is a protocol that does not have a network layer and is defined in the standard ARIB-STD-T75, for example, and is referred to as a predetermined protocol in the present invention.

  At this time, the transaction management unit 330 on the application apparatus 30 performs data transmission to the radio mobile station 10 via the first or second radio base station 20 or 21 using the separation connection unit 530. That is, the separation connection unit 530 uses the local network 31 that connects the first and second radio base stations 20 and 21 and the application device 30 to tunnel the protocol defined by the transaction management units 330 and 310. The separation connection unit 530 on the application device 30 includes a mobile location management table 530a that stores mapping information including a mobile station ID (described later), a link address of the wireless mobile station 10, and a wireless mobile station that is a communication partner. 10 includes a transfer control unit 530b that manages which communication area 10 is present and selects a communicable radio base station to transfer data, so that a plurality of radio base stations can communicate with the radio mobile station 10 Enable continuous communication.

Regarding communication between the radio mobile station 10 of FIG. 2 and the first radio base station 20 and the application device 30,
1) Initial connection operation when the mobile unit 101 first enters the communication area 20a.
2) Data transmission / reception after the initial connection operation is completed.
3) Continuation of communication when the mobile unit 101 leaves the communication area 20a and enters another communication area (for example, 21a).
Will be described sequentially.

1) The operation flow at the time of initial connection is shown in the sequence diagram 3 and the flowchart in FIG. A typical operation at the time of initial connection of the wireless mobile communication system according to the first embodiment will be described with reference to the sequence diagram 3 and the flowchart FIG. In the sequence diagram 3, the names of devices and the like described in the blocks shown at the top of the diagram indicate the source and destination of the arrows indicating the operations described at the bottom of the diagram.
In step S <b> 101, the mobile unit 101 enters the first communication area 20 a of the first radio base station 20.
In step S102, a radio link is established between the radio mobile station 10 mounted on the mobile unit 101 and the first radio base station 20, and an initial connection sequence of the narrowband radio communication to be used is performed.
In step S <b> 103, the radio mobile station 10 transmits a mobile station ID (also referred to as mobile station identification information) for identifying itself to the first radio base station 20. As the mobile station ID used here, for example, vehicle identification information defined by ARIB-STD-TR17 may be used. Note that the mobile station ID used here does not have to be permanent, and it must be the same only while traveling in the communication area of a plurality of radio base stations (until transmission / reception of one data is completed). That's fine. For example, personal privacy information is protected by generating a different ID every time a predetermined time elapses by a mobile station identification information changing means (not shown) provided in the wireless mobile station or every time the vehicle engine is started. be able to.

In step S111, the first radio base station 20 receives the mobile station ID transmitted in step S103, and then transfers this information to the separation connection unit 530 on the application device 30.
Upon receiving the mobile station ID, the separation connecting unit 530 receives at least the mobile station ID, the link address of the radio mobile station 10, the address of the first radio base station 20 that has sent this ID, and the communication state “in communication” in step S121. Is registered in the moving body location management table 530 a having the separation connection unit 530.
In step S122, the transaction management unit 330 is notified of the entry of the mobile unit 101 into the communication area together with the notification of the mobile station ID.

In step S131, the transaction management unit 330 of the application device 30 notifies the local application 430 and 431 included in the application device 30 of the entry notification of the mobile unit 101 notified in step S122 and the mobile station ID. In each application, the initial connection procedure is completed, and data transmission between each local application on the application apparatus 30 and the local applications 410 and 411 on the wireless mobile station 10a becomes possible.
As described above, in the present invention, the operation indispensable for the local application, that is, notification of area entry, also serves to generate a table and the like necessary for transfer, and an additional sequence accompanying the participation in the network does not occur at all. As a result, the initial connection can be processed at high speed.

2) Next, FIG. 5 shows a sequence diagram at the time of data transfer in the present invention, and FIG. 6 shows a flowchart. A typical operation at the time of data transmission in the first embodiment will be described with reference to the sequence diagram and the flowchart.
In step S241, the local application on the application apparatus 30 requests the transaction management unit 330 to transmit data with the mobile station ID as the destination. As a result, the transaction management unit 330 performs its own protocol processing such as adding a header in step S242, and then requests the separation connection unit 530 to transfer data in step S243.

In step S244, the transfer control unit 530b of the separation connection unit 530 refers to the mobile location management table 530a using the mobile station ID as a key, and transmits the communication link addresses of the first radio base station 20 and the radio mobile station 10 as transfer destinations. The communication state of the wireless mobile station 10 is acquired. If the communication state is in communication, a data transmission request is made to the determined first radio base station 20 in step S245.
When the separated connection unit 520 of the first radio communication base station 20 receives the transfer data, the data link unit 220 and the radio unit 120 are used to transmit data to the local application of the radio mobile station 10 in step S246.
The transaction management unit 310 of the wireless mobile station 10 that has received this data performs its own protocol processing such as header analysis in step S247, and notifies the local application of data reception in step S248. In step S249, an arrival confirmation is transmitted to the transaction management unit 330 on the application apparatus 30. The transaction management unit 330 on the application device 30 stores the transmission data until the arrival confirmation is received, and prepares for retransmission in case the mobile unit 101 leaves the communication area 20a before receiving the data. This is called transfer completion confirmation means.

  In addition, when the transmission data size is large (meaning large here means that reception cannot be completed while the mobile body is in one communication area), the transaction management unit on the application device 30 330 divides the data into appropriate (smaller) sizes for transmission. At this time, the transaction management unit 310 of the wireless mobile station 10 receives all of the divided data, notifies the local application 410 of data reception, and completes reception to the transaction management unit 330 on the application apparatus 30. Send. Thereby, by leaving the communication area 20a, for example, even when the second half of the transmission data is not received, it is possible to receive the remaining transmission data in the next entering communication area. It enables to receive large size data across base stations.

3) Next, FIG. 7 shows a sequence diagram when the mobile unit 101 leaves the first communication area 20a and enters the second communication area 21a, and FIG. 8 shows the flow. A typical operation when leaving the communication area and when reconnecting will be described with reference to FIG. The upper part of FIG. 7 shows the operation at the time of separation, and the lower part shows the operation at the time of re-entry.
When the wireless mobile station 10 detects that it has moved out of the communication area 20a in step S301, an area departure timer T1 provided in the wireless mobile station 10 is started in step S302. The departure is determined from the fact that the wireless link is not established.
In step S311, the first radio base station 20 detects that the radio mobile station 10 has moved out of the communication area 20a.
In step S312, the ID of the mobile station that has moved out of the communication area 20a is notified to the separation connection unit 530 of the application apparatus 30 as an out-of-area movement notification.

In step S321, the separation connection unit 530 on the application device 30 that has received the out-of-area movement notification transmitted from the first radio base station 20 uses the ID or link address notified in step S312 described above as a key. The location management table 530a is searched, and the communication information of the corresponding entry is changed from “busy” to “suspended”.
In step S322, the transaction manager 330 is notified of a temporary departure from the communication area of the mobile object.
In step S323, the moving body entry deletion timer T2 is started.
Upon receiving the temporary withdrawal notification notified in step S322, the transaction management unit 330 of the application apparatus 30 temporarily stops the message transfer in step S331 and accumulates data transfer requests issued from the local application thereafter. (Step S341, Step S332).

When the mobile unit 101 enters the communication area 21a of the next wireless communication base station 21, there are the following two conditions.
3A) The case where the timer T1 and the timer T2 started in step S323 enter after time-out.
3B) When only timer T1 times out and enters before timer T2 times out.
3C) Entering before timer T1 and timer T2 time out.
For convenience of explanation, it will be described as (time of timer T1) <(time of timer T2), but the reverse may be possible.
3A), that is, when the timer T2 times out before entering the new area, the mapping information of the corresponding mobile station ID is deleted from the mobile location management table 520a, and the transaction management unit 330 is moved. Notification is given of complete departure from the communication area of the body 101 (that is, the communication 101 is terminated with no expectation of resumption of communication). When the transaction manager 330 receives the complete leave notification, the transaction being executed for the mobile station ID notified by this notification is discarded, and the local application being executed is notified of the departure from the communication area of the mobile unit. To do.
When entering a new area after this, it is not necessary to explain, and since the same operation is performed only by the area number and the radio base station number differing from the previous entry into the communication area 20a, detailed description will be omitted. .

The case of 3B) will be described.
When the timer T1 times out before entering the new area, the local application being executed is notified of leaving the communication area, and the application is terminated.

In the case of 3C), that is, when a new communication area is entered before both timers T1 and T2 time out. First, steps S304, S305, and S313 are executed in the same manner as steps S102, S103, and S111 at the time of initial connection described above (the radio base station is changed to the second radio base station 21). A notification of entry of the station 10 into the communication area 21 a is notified to the separation connection unit 530 of the application device 30.
At the same time, in step S324, the separation connection unit 530 of the application device 30 stops the timer T2 started in step S323.
Further, as step S325, the mobile body location management table 530a is searched using the mobile body ID notified in step S313 as a key, the link address of the corresponding entry, the address in the second radio base station 21 are updated, and the communication is performed. Change the status to “Communicating”.
In step S326, the transaction management unit 330 is notified of the entry of the wireless mobile station 10 into the communication area 21a.

The transaction management unit 330 of the application device 30 that has received the notification of entry into the communication area 21a of the wireless mobile station 10 resumes the data transfer that was interrupted in step S331, and the transaction management unit 330 accumulates during the interruption. The existing data transfer request is resumed.
Note that a message that has been transmitted from the application apparatus 30 but has not reached the wireless mobile station 10 can be solved by making a retransmission request for an unarrived portion from the wireless mobile station 10 side.
In addition, when the transmission of the suspended message is resumed, the radio mobile station 10 notifies the area entry notification of the data reception status in the previous communication area (referred to as information notification means), and the transaction management unit 330 of the application apparatus 30 By using this information to determine the data to be transmitted (referred to as transmission content determination means), the retransmission sequence of the unarrived portion does not occur, and more efficient data transmission is possible.

Embodiment 2. FIG.
In each radio base station, the radio mobile station 10 enters the communication area, and a plurality of applications try to start communication. In this case, controlling the priority of process start for each application, such as a high priority application or an application where it is better to start the process earlier because processing takes time, will improve the overall processing speed. Required. In this embodiment, a radio mobile communication system adapted to meet such a request will be described.
FIG. 9 is an explanatory diagram showing the configuration of the transaction management unit 330 provided in the application apparatus 30 of the mobile radio communication system according to the second embodiment of the present invention. Parts other than those shown in FIG. 9 are the same as those shown in FIGS.
The transaction management unit 330 includes a multiplexing / division assembly processing unit 333, multiplexing transmission / reception with a plurality of counterpart stations, simultaneous processing of transactions of a plurality of applications, and a message larger than a lower layer MTU (maximum transfer unit). Is received, and an assembling process is performed after receiving a message that has been divided and transmitted by a communication partner station (such as a base station).

The transaction management unit 330 includes a reception buffer 331 and a transmission buffer 332, and a buffer management unit 334 that manages the state of these buffers is provided, and is processed by the divided assembly processing unit 333 accumulated in the reception buffer 331. The configuration is such that the message processing order and the message transmission order before transmission to the lower layer (separate connection unit 530) after processing can be interchanged.
As a method for acquiring information for determining the processing order of messages from an application, information indicating a priority level (referred to as priority information) is input to each application in advance and designated as a priority at the time of transmission. In addition to this method, there is a method of using a port number that is an identifier of a destination application.
In the processing on the receiving side, the same priority receiving function can be realized by using the port number that is the transmission source / destination of the application. This process is performed by the buffer management unit 334.

Hereinafter, the operation of determining the priority or quality and switching the processing order will be described in detail.
The transaction management unit 330 is provided with a function management unit 336 that manages functions actually included in the transaction management unit 330 among the functions (tables) of the transaction service. The function management unit 336 includes a profile (LPP_Profile) of the transaction management unit at the time of starting the application, and a profile (App_Profile) indicating a transaction function necessary for executing the application and communication quality (QoS: Quality of Service) and priority required by the application. Replace with. That is, the function management unit 336 compares the LPP_Profile and App_Profile, and permits the execution of the application only when the transaction management unit 330 has a communication function required by the application.

  The priority management unit 335 refers to a plurality of App_Profiles exchanged by the function management unit 336 (the processing priority order is changed), replaces communication quality (QoS) required by the plurality of applications with a relative evaluation between the applications, The message order in the reception buffer 331 is changed so that the ratio of the data traffic of the plurality of applications transmitted to the layer matches the QoS ratio. At this time, if there is a message of an application having a high emergency priority, the message is preferentially transmitted to the multiplexing / division assembly processing unit 333, and the high priority message existing in the transmission buffer is preferentially sent to the lower layer. The message order in the transmission buffer 332 is changed so that it is transmitted.

As described above, in the first and second radio base stations 20 and 21, as the radio mobile station 10 enters the communication area, a plurality of applications try to start communication simultaneously with the entry of the radio mobile station 10. . At this time, the priority management unit 336 compares the application priority of the messages in the reception buffer 331, and the multiplexing / division assembly processing unit 333 processes the messages in the reception buffer 331 in descending order of priority. Change the order.
According to the configuration shown in FIG. 9, emergency information can be interrupted during execution of a plurality of applications, and a necessary communication band can be allocated to maintain the communication quality required by the applications. . In particular, priority control of the transmission order can be performed when the mobile station enters the communication area in narrow area communication, and emergency information can be notified to the mobile station earlier. In addition, it is possible to prevent erroneous installation, erroneous execution, and unnecessary communication associated therewith due to a mismatch between the communication function required by the application and the function of the transaction processing unit.

  The present invention can be used not only for communication systems for automobiles traveling on roads but also for railways. It can also be used as a toll road clearing device, traffic information and other information transmission system.

1 is an overall configuration diagram of a wireless mobile communication system of the present invention. 2 is an internal configuration diagram of each device of the wireless mobile communication system according to Embodiment 1. FIG. FIG. 3 is a sequence diagram illustrating an initial connection operation of each device in FIG. 2. It is a flowchart explaining the sequence diagram of FIG. It is a sequence diagram explaining the output operation | movement of the application service in the structure of FIG. It is a flowchart explaining the sequence diagram of FIG. FIG. 3 is a sequence diagram illustrating communication termination and reconnection operation of each device in FIG. 2. It is a flowchart explaining the communication completion | finish operation | movement of the sequence diagram of FIG. It is a flowchart explaining the reconnection operation | movement of the sequence diagram of FIG. 6 is a configuration diagram illustrating a configuration of a transaction management unit of an application apparatus of a wireless mobile communication system according to a second embodiment. FIG.

Explanation of symbols

100 roads, 101 mobiles, 20 first radio base stations,
21 2nd radio base station, 20a 1st communication area, 20b 2nd communication area,
30 application device, 31 second communication network (second communication line),
410, 430 first local application,
411, 431 second local application,
310, 330 Transaction management unit,
210, 220 Data link part,
110, 120 radio unit, 520, 530 separate connection unit,
530a mobile body position management table, 530a transfer control means.

Claims (6)

A wireless mobile station that is mounted on a vehicle traveling on a road and that wirelessly outputs unique mobile station identification information according to a predetermined protocol, and receives an application service transmitted corresponding to the mobile station identification information,
A plurality of mobile stations that are installed along the road, perform wireless communication with the wireless mobile station according to the protocol, receive the mobile station identification information, and output the mobile station identification information via a second communication line. Wireless base station,
An application connected to the radio base station via the second communication line, receiving the mobile station identification information output from the radio base station, and holding the application service for providing to the radio mobile station apparatus,
A transaction management unit that is installed in the application device and divides and transmits the data of the application service, and the application service via the second communication network to the radio base station that outputs the mobile station identification information. and a transfer control means for transferring the divided data,
A wireless mobile communication system comprising a transaction management unit installed in the wireless mobile station and transmitting a reception completion to the transaction management unit of the application device after receiving all of the divided data of the application service . The wireless mobile station notifies the reception status of data from the previous wireless base station,
The wireless mobile communication system according to claim 1 , wherein the transaction management unit of the application apparatus determines data to be transmitted using the reception status . The radio mobile station changes the mobile station identification information that changes the mobile station identification information every time a predetermined time exceeds a predetermined time or when communication between the mobile radio station and the radio base station stops. The wireless mobile communication system according to claim 1, further comprising means. The content of the application service received from the application device in the previous communication when the wireless mobile station makes an initial connection with the other one of the wireless base stations after the communication with one of the wireless base stations is completed. Information notification means for outputting information on
2. The wireless mobile communication system according to claim 1, wherein the application apparatus includes a transmission content determination unit that determines the content of the application service to be transmitted based on the information. The transaction management unit of the application device performs transaction processing for a plurality of applications executed by the application device ,
The application device is provided in a transaction management unit, and exchanges communication quality or priority required by each of the plurality of applications.
A transmission / reception buffer for temporarily storing communication signals with the wireless mobile station;
A priority management unit that determines the order of the communication signals in the transmission / reception buffer according to the communication quality or priority;
Based on the determination of the priority management unit, comprising a buffer management unit for changing the transmission / reception order of the communication signals stored in the transmission / reception buffer ,
The wireless mobile communication system according to claim 1, wherein the function management unit determines the priority requested by each application based on a port number of a transmission destination or a transmission source of each application .   The wireless mobile communication system according to claim 5, wherein the priority management unit executes the exchange of the communication quality or the priority when the application is activated.

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