Radio mobile communication system

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

Between a mobile body traveling along a road, for example, a wireless mobile station mounted on an automobile and another mobile body or an applied device that provides various information via a nearest ground station (hereinafter referred to as a base station). There is a mobile wireless communication system (also called a road-to-vehicle communication system) that performs wireless communication and realizes services for improving safety and comfort. For example, Intelligent Transport Systems Are known. In order to help understanding, in the following explanation, as an example, a data transmitter / receiver (including a mobile phone, hereinafter referred to as a communication device) used for a car traveling on a road where wireless base stations are arranged at appropriate intervals along the road is provided. The case of a wireless mobile station will be described, but it goes without saying 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, concrete examples will be illustrated and explained. For example, while the mobile body is traveling within the communication range of the wireless base station installed by the communication company (Company A) that manufactured the communication device used for the wireless mobile station, the mobile station and the base station are usually connected to each other. There is no problem because the applications are common, but for example, when you go far away and move to a range where there is only a base station of another communication company (Company B), the base station of Company B and the base station of Company A move. If the communication applications used by the stations are not the same (they are compatible in handling data), communication will not be possible and services will not be available. This is extremely inconvenient for users. In addition, the size of the data to be sent and received has increased in the area of one wireless base station because there are more opportunities to send and receive map information, ever-changing traffic jam information, weather information, movie / music / town information, etc. In some cases, data reception is not completed while driving. It is proposed as follows to devise a way to complete the reception of all data even in such a case.

Non-Patent Document 1 (Electronic Information and Communication Society, ITS Study Group "Evaluation of IP handover method in DSRC network" uses IP as a network layer protocol and uses macro / micromobility technology such as Mobile IP and Cellular IP. By doing so, a technology that enables communication across multiple base stations is disclosed. However, in existing network-type protocols such as IP, every time a mobile body enters a communication area, it is disclosed. Since it is necessary to reconfigure the network, it takes time for the initial connection, which is inconvenient to use for communication with a moving object that moves at high speed, and many in-vehicle devices are networked. However, there is a problem that existing network-type protocols such as IP cannot always be used.

In addition, 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 provided for hand-over of communications between discontinuous narrow-area radio areas. Those that perform autonomous decentralized control without a gateway are disclosed. However, in autonomous decentralized control, since the target value is about 100 mSec as the time to start communication, there is a problem that it takes time from entering the area to starting communication, and immediate communication cannot be realized.

Further, in Patent Document 1 (Japanese Patent Laid-Open No. 2001-16160), whether a target mobile station exists in its own communication area on the side of the base station by performing broadcast communication from the base station management device to a plurality of base stations. A technology that enables communication across a plurality of base stations by determining whether or not to use the target mobile station and making a transfer determination to the target mobile station is disclosed. However, since the communication base station makes the transfer decision to the mobile station and broadcast communication is used for the roadside network, a large amount of unnecessary communication occurs, and the mobile station side exchanges packets. Since it is premised that the network communication means of the above is provided, there is a problem that the configuration on the mobile station side becomes complicated.

One way to solve these problems is to use a non-network type protocol. In the non-network type protocol, when the mobile enters a certain communication area, the initial connection procedure is completed in a short time because it is not necessary to configure the network. Therefore, it is suitable for providing services that require immediacy, such as services while driving in narrow-range wireless communication. In addition, since one-to-one communication is performed end-to-end, it is known that there is no needless communication in the roadside network.

For example, in Non-Patent Document 3 (IPSJ ITS Study Group "DSRC (ARIB STD-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 communication between local applications using a non-network type protocol has been proposed. However, in the above application using the non-network type protocol, communication is completed between one base station and a mobile station, and it exists in a mobile station that moves between a plurality of base stations and their discontinuous communication areas. Since communication cannot be passed between different applications, there arises a problem that a large amount of data cannot be transmitted / received to / from a moving body moving at high speed, that is, communication is not sustainable.

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

Furthermore, Non-Patent Document 5 (Evaluation Urgent MessageTransmission 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 mobile stations, which is a feature of mobile communication, and the target is emergency information and other communications, and in reality, detailed priorities for each application are considered. There was a problem that it was not possible to do it practically.<patcit num="1"><text>JP 2001-16160</text></patcit><nplcit num="1"><text>IEICE, ITS Study Group "Evaluation of IP Handover Method in DSRC Network"</text></nplcit><nplcit num="2"><text>Implementation and evaluation of mobile network platform for highly reliable communications on smart gateway</text></nplcit><nplcit num="3"><text>Information Processing Society of Japan ITS Study Group "DSRC (ARIB STD-T75 compliant) System Implementation and Evaluation" (2002-ITS-10-10)</text></nplcit><nplcit num="4"><text>Standard ARIB-STD T-75</text></nplcit><nplcit num="5"><text>Evaluation Urgent MessageTransmission Performance of High Reliable Quality of service (QoS) Method for smart Gateways</text></nplcit>

<p> A non-network type protocol for a wireless mobile communication system between a wireless base station arranged at a certain interval along a road and a wireless mobile station that communicates while sequentially moving in the communication area of the wireless base station. It is excellent from the viewpoint that various merits can be obtained by using. However, in a conventional wireless mobile communication system using a non-network type protocol, communication must be completed between one base station and the mobile station, and each of the multiple base stations arranged along the road must be completed. There is a problem that communication cannot be passed (continuously executing one communication) between the application being used and the application used for the mobile station moving between the discontinuous communication areas. Therefore, if the data to be transmitted / received is a large amount of data that cannot be disconnected arbitrarily in the middle of the communication, the moving body deviates from the area in the middle of the communication, so that the transmission / reception is not completed and therefore the transmission / reception cannot be completed. there were.</p><p> The present invention solves the above-mentioned problems, uses a non-network type protocol, and enables high-speed moving mobile body to transfer application communication between a plurality of base stations and perform continuous communication. It is also an object of the present invention 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 like request / response type communication and the moving body deviates from the communication area before the processing is completed, the communication partner will contact the next communication area. The purpose is to obtain a wireless mobile communication system that can receive a response.</p>

<p> The wireless mobile communication system of the present invention is mounted on a vehicle traveling on a road and wirelessly outputs unique mobile station identification information by a predetermined protocol and is an applied service transmitted to the mobile station identification information. A wireless mobile station that receives the mobile station, is installed along the road, performs wireless communication with the wireless mobile station according to the protocol, receives the mobile station identification information, and uses the mobile station identification information for a second communication. A plurality of wireless base stations that output via a line, connected to the wireless base station via the second communication line, receive the mobile station identification information output by the wireless base station, and receive the wireless mobile station. The application service is transferred to the application device having the application service for providing to the radio base station, which is installed in the application device and outputs the mobile station identification information, via the second communication network. It is provided with a transfer control means for performing.</p>

<p> According to the wireless mobile communication system of the present invention, among a plurality of wireless base stations, the wireless base station that has received the mobile station identification information is in charge of communication with the wireless mobile station, and is the original wireless 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 / received from different base stations. Further, even when the processing time in the application is long as in the request / response type communication, the response from the communication partner can be received after moving to another communication area. Further, during execution of a plurality of applications, the application can be temporarily interrupted and emergency information can be interrupted by determining the processing order based on the processing priority. Further, in order to ensure the communication quality required by the application, the communication band required by the application can be allocated. Further, it is possible to prevent erroneous mounting and erroneous execution in the base station / mobile station due to the mismatch of the mounting functions.</p>

Embodiment 1. FIG. 1 is an explanatory diagram for explaining the configuration of the wireless mobile communication system according to the first embodiment of the present invention, and FIG. 2 is a block for explaining the functional elements of each device constituting the wireless mobile communication system of FIG. It is a figure. A plurality of radio base stations (for convenience of explanation, only the first radio base station 20 and the second radio base station 21 are shown in FIG. 1) are installed along a certain road 100. The first and second wireless base stations 20 and 21 are wireless communication base stations that perform narrow-range wireless communication such as DSRC (Dedicated Short Range Communication), and each has a communication area with a radius of several meters to several tens of meters (first communication area). It has 20a and a second communication area 21a). These communication areas do not have to be connected to each other. As shown in FIG. 2, the mobile body 101 traveling on the road 100 has an on-board unit (hereinafter referred to as a wireless mobile station 10) for communicating with the first and second wireless base stations 20 and 21 by narrow-range wireless communication. ) Is installed. The on-board unit includes, for example, an ETC on-board unit. The wireless mobile station 10 handles multiple (two types in the figure) local applications (first local application 410 and second local application 411) for communication, and transaction processing of the operations of these multiple local applications (the entire series of work is performed). It is provided with a transaction management unit 310 that performs (managing as one process), a data link unit 210 that communicates with a wireless base station 20 or 21 existing in the communication area, and a wireless unit 110 that performs wireless transmission / reception. It is possible to communicate 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 radio mobile station 10a and the radio mobile station 10b represent the same radio mobile station 10 in different positions, and in the radio mobile station 10a, the mobile body 101 is the first communication area 20a of the first radio base station 20. It represents what is inside. The radio mobile station 10b represents a state in which the mobile body 101 is moving (may be stopped) in the second communication area 21a of the second radio base station 21. The application device 30 is placed on the roadside of the road 100 or on the management building of the road (not shown), executes the first local application 430 and the second local application 431, and collects various services (for example, highway toll collection) to the vehicle. A device that provides information, congestion information, emergency notification information about earthquakes and disasters, etc.), transaction management unit 330 that processes the operations of these multiple local applications, multiple radio base stations, and a second communication network ( It is also called a second communication line, and is connected by 31 (whether wireless or wired), and is equipped with a separate connection unit 530 that selects a partner station to communicate from among those wireless base stations and performs communication. There may be more local applications, but for convenience of explanation, only two are shown here. 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 the protocol (non-network type protocol). Further, 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. Communicate with each other using the protocol (non-network type protocol). This non-network type protocol refers to a protocol having no network layer, for example, as defined in the standard ARIB-STD-T75, and is referred to as a predetermined protocol in the present invention.

At this time, the transaction management unit 330 on the application device 30 uses the separate connection unit 530 to transmit data to the wireless mobile station 10 via the first or second radio base station 20 or 21. That is, the separate connection unit 530 tunnels the protocol defined by the transaction management units 330 and 310 by using the local network 31 that connects the first and second radio base stations 20 and 21 and the application device 30. Further, the separate connection unit 530 on the application device 30 has a mobile position 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. By having a transfer control means 530b that manages which communication area the 10 exists in, selects a wireless base station that can communicate, and transfers data, the wireless mobile station 10 by a plurality of wireless base stations can be used. Enables continuous communication.

Regarding the communication between the wireless mobile station 10 in FIG. 2, the first wireless base station 20, and the application device 30, 1) the initial connection operation when the mobile 101 first enters the communication area 20a. 2) Sending and receiving data after the initial connection operation is completed. 3) Continuation of communication when the mobile body 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 sequence diagram 3 and flowchart diagram 4. The typical operation at the time of initial connection of the wireless mobile communication system of the first embodiment will be described with reference to the sequence diagram 3 and the flowchart diagram 4. Sequence In FIG. 3, the names of the devices and the like described in the block described in the upper part of the figure indicate the activation source and the activation destination of the arrow indicating the operation described in the lower part of the figure. In step S101, the mobile body 101 enters the first communication area 20a of the first radio base station 20. In step S102, a wireless link is established between the wireless mobile station 10 mounted on the mobile body 101 and the first wireless base station 20, and the initial connection sequence of the narrow-range wireless communication to be used is executed. In step S103, 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, the vehicle identification information specified in ARIB-STD-TR17 may be used. The mobile station ID used here does not have to be permanent, and may be the same only while traveling in the communication area of a plurality of wireless base stations (until the transmission / reception of one data is completed). Just do it. For example, personal privacy information is protected by generating a different ID every predetermined time elapse or each time the engine of the vehicle is started by a mobile station identification information changing means (not shown) provided in the wireless mobile station. 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 separate connection unit 530 on the application device 30. When the separate connection unit 530 receives the mobile station ID, in step S121, at least the mobile station ID, the link address of the wireless mobile station 10, the address of the first radio base station 20 that sent this ID, and the communication status "communication". The mapping information consisting of "" is registered in the mobile body position management table 530a having in the separate connection unit 530. Further, in step S122, the transaction management unit 330 is notified of the entry of the mobile body 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 applications 430 and 431 having in the application device 30 of the intrusion notification of the mobile body 101 notified in step S122 and the mobile station ID. The initial connection procedure is completed in each application, and data transmission between each local application on the application device 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 of notification of area entry, which is indispensable for the local application, also serves to generate the table and the like required for transfer, and no additional sequence associated with joining the network is generated. This makes it possible to process the initial connection 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. Using this sequence diagram and the flowchart, a typical operation at the time of data transmission in the case of the first embodiment will be described. In step S241, the local application on the application device 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 separate connection unit 530 to transfer data in step S243.

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

If the transmitted data size is large (the large meaning here means that reception cannot be completed while the mobile unit is in one communication area), the transaction management unit on the application device 30. The 330 divides the data into appropriate (smaller) sizes and sends them. At this time, the transaction management unit 310 of the wireless mobile station 10 notifies the local application 410 of the data reception after receiving all the divided data, and notifies the transaction management unit 330 on the application device 30 that the reception is completed. Send. As a result, by leaving the communication area 20a, for example, even if the data in the latter half of the transmission data has not been received, it is possible to receive the remaining transmission data in the communication area to be entered next, and a plurality of transmission data can be received. It makes it possible to receive a large amount of data across base stations.

3) Next, FIG. 7 shows a sequence diagram and FIG. 8 shows a flow when the mobile body 101 leaves the first communication area 20a and enters the second communication area 21a. With reference to this figure, a typical operation at the time of leaving the communication area and at the time of reconnection will be described. The upper part of FIG. 7 shows the operation at the time of withdrawal, and the lower part shows the operation at the time of re-entry. In step S301, when it is detected that the radio mobile station 10 itself has moved out of the communication area 20a, the area leaving tie provided to the wireless mobile station 10 at step S302 to start the mer T1. Withdrawal is revealed by the fact that the wireless link is no longer 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. The ID of the mobile station moved out of the communication area 20a in step S312 is notified to the separate connection unit 530 of the application device 30 as an out-of-area movement notification.

The separate connection unit 530 on the application device 30 that received the out-of-area movement notification transmitted from the first radio base station 20 in step S321 is a mobile body using the ID or link address notified in step S312 above as a key. Search the location management table 530a and change the communication information of the corresponding entry from "communication" to "suspended". In step S322, the transaction management unit 330 is notified of the temporary departure of the mobile from the communication area. In step S323, the mobile entry deletion timer T2 is activated. When the transaction management unit 330 of the application device 30 receives the temporary withdrawal notification notified in step S322, the transaction management unit 330 temporarily suspends the message transfer in step S331 and accumulates the data transfer requests issued from the local application thereafter. (Step S341, Step S332).

When the mobile body 101 enters the communication area 21a of the next wireless communication base station 21, there are the following two conditions. 3A) When entering after timer T1 and timer T2 started in step S323 time out. 3B) When only timer T1 times out and enters before timer T2 times out. 3C) When entering before timer T1 and timer T2 time out. For convenience of explanation, the explanation is given as (timer T1 time) &lt;(timer T2 time), but the opposite may be true. In the case of 3A), that is, if the timer T2 times out before entering the new area, the mapping information of the corresponding mobile station ID is deleted from the mobile position management table 520a and moved to the transaction management unit 330. Notifies the complete departure of the body 101 from the communication area (that is, the communication ends with no prospect of resumption). When the transaction management unit 330 receives the complete withdrawal notification, the transaction being executed for the mobile station ID notified by this notification is discarded, and the executing local application is notified of the withdrawal from the communication area of the mobile body. To do. When entering a new area after this, the same operation is performed except for the entry into the previous communication area 20a and the area number and radio base station number, so detailed explanation is omitted. ..

The case of 3B) will be described. If timer T1 times out before entering a new area, it notifies the running local application of leaving the communication area and terminates this application.

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

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

Embodiment 2. At 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 processing start priority for each application, such as an application with a high priority or an application for which it is better to start processing earlier because processing takes time, is to improve the processing speed as a whole. Required. In the present embodiment, a wireless mobile communication system that meets such a demand will be described. FIG. 9 is an explanatory diagram showing a configuration of a transaction management unit 330 provided in the application device 30 of the mobile wireless communication system according to the second embodiment of the present invention. The parts other than those shown in FIG. 9 are the same as those shown in FIGS. 1 and 2, and the description thereof will be omitted. The transaction management unit 330 includes a multiplexing / split assembly processing unit 333, which multiplexes transmission / reception with a plurality of partner stations, simultaneous parallel processing of transactions of a plurality of applications, and a message larger than the lower layer MTU (maximum transmission unit). Is performed in the case of receiving the message, and the assembly process is performed after receiving the message divided and transmitted by the communication partner station (base station, etc.).

The transaction management unit 330 includes a receive buffer 331 and a transmit buffer 332, and a buffer management unit 334 that manages the state of these buffers is provided before being processed by the division assembly processing unit 333 stored in the receive buffer 331. It is configured so that the processing order of messages and the message transmission order after processing and before sending to a lower layer (separate connection unit 530) can be exchanged. In addition, as a method of 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 the information is specified as a priority at the time of transmission. In addition to the method, there is a method of using the port number which is the identifier of the destination application. Also, in the processing on the receiving side, the same priority receiving function can be realized by using the port number that is the 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 changing the processing order will be described in detail. The transaction management unit 330 is provided with a function management unit 336 that manages the functions actually possessed by the transaction management unit 330 among the transaction service functions (table). The function management unit 336 has a profile (LPP_Profile) of the transaction management unit when the application is started, and a profile (App_Profile) indicating the transaction function required for executing the application and the communication quality (QoS: quality of service) and priority required by the application. And exchange. That is, the function management unit 336 compares LPP_Profile and App_Profile, and permits the execution of the application only when the transaction management unit 330 has the 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 exchanged), replaces the communication quality (QoS) required by the multiple applications with the relative evaluation between the applications, and lowers the level. The message order in the receive buffer 331 is changed so that the ratio of the data traffic of multiple applications transmitted to the layer matches the ratio of QoS. At that time, if a message of an application having a high urgent priority exists, it is preferentially transmitted to the multiplexing / division assembly processing unit 333, and the high priority message existing in the transmission buffer is given priority to the lower layer. Swap the message order in the send buffer 332 so that it is sent.

As described above, in the first and second radio base stations 20 and 21, as the wireless mobile station 10 enters the communication area, a plurality of applications try to start communication at the same time as the wireless mobile station 10 enters. .. At this time, the priority management unit 336 compares the application priorities of the messages in the reception buffer 331, and the messages in the reception buffer 331 are processed by the multiplexing / division assembly processing unit 333 in order from the highest priority. Change the order. According to the configuration shown in FIG. 9, it is possible to interrupt emergency information and allocate the required communication band in order to maintain the communication quality required by the application while executing a plurality of applications. .. In particular, it is possible to control the priority of the transmission order when the mobile station enters the communication area in narrow area communication, and it is possible to notify the mobile station of emergency information earlier. In addition, it is possible to prevent erroneous mounting on a base station / mobile station due to a mismatch between the communication function required by the application and the function provided by the transaction processing unit, erroneous execution, and unnecessary communication associated therewith.

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

<figref num="1">It is an overall block diagram of the wireless mobile communication system of this invention.</figref><figref num="2">It is an internal block diagram of each apparatus of the wireless mobile communication system of Embodiment 1. FIG.</figref><figref num="3">It is a sequence diagram explaining the initial connection operation of each device of FIG.</figref><figref num="4">It is a flowchart explaining the sequence diagram of FIG.</figref><figref num="5">It is a sequence diagram explaining the output operation of the application service in the configuration of FIG.</figref><figref num="6">It is a flowchart explaining the sequence diagram of FIG.</figref><figref num="7">It is a sequence diagram explaining the communication termination and reconnection operation of each device of FIG.</figref><figref num="8">It is a flowchart explaining the communication termination operation of the sequence diagram of FIG.</figref><figref num="9">It is a flowchart explaining the reconnection operation of the sequence diagram of FIG.</figref><figref num="10">It is a block diagram which shows the structure of the transaction management part of the application apparatus of the wireless mobile communication system of Embodiment 2.</figref>

Code description

100 Road, 101 Mobile, 20 1st Radio Base Station, 21 2nd Radio Base Station, 20a 1st Communication Area, 20b 2nd Communication Area, 30 Application Equipment, 31 2nd Communication Network (2nd Communication Line) , 410, 430 1st local application, 411, 431 2nd local application, 310, 330 Transaction management, 210, 220 Data link, 110, 120 Radio, 520, 530 Separate connection, 530a Mobile location management table , 530a Transfer control means.