JP2010268203A - Mobile communication system, mobile communication device, mobile communication program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile communication system, etc., capable of efficiently acquiring information desired by a user even if passing a wireless communication area. <P>SOLUTION: In the mobile communication system in which wireless communication is performed between a plurality of mobile communication devices (A, service request source), the mobile communication device A stores a service identifier IID and service information Info from information supplied from an information transmitter 2. The mobile communication device (service request source) designates the service identifier IID and transmits a service request for requesting the transmission of the service information. The mobile communication device A determines, in the case of moving to a radio communicable range (2) to receive the service request, whether the service identifier IID included in the service request is stored, and whether the service information Info associated with the service identifier IID is stored, and transmits the service information to the mobile communication device (service request source) when the service information is stored. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a mobile communication system, a mobile communication device, and a mobile communication program in which a mobile communicates to acquire information.

  Conventionally, WiFi, WiMax, BlueTooth, etc. are known as wireless communication technologies between communication devices. These wireless communication technologies communicate various information such as event data between devices within a specific communication range.

  As a technique using such a wireless communication technique, a technique described in Patent Document 1 below is known. This technology relates to a vehicle-to-vehicle communication system that includes a plurality of wireless communication devices mounted on a vehicle and each communicates wirelessly. The wireless communication device in this inter-vehicle communication system is presumed to be present in its own wireless communication area at the time of actual relay processing when there is no other wireless communication device in its own wireless communication area. Communication data is transmitted to other mobile communication terminals to relay the communication data.

JP 2006-60635 A

  When the wireless communication device is mounted on the mobile body, the communication device moves according to the movement of the mobile body. For this reason, communication becomes impossible when the communication range of the communication device exceeds a predetermined wireless communication range. For example, even WiMax with a wide communication range cannot communicate unless the radius is within 10 km. In addition, even when the information exceeds a predetermined wireless communication area, when the information desired by the user is acquired, the information may not be acquired efficiently.

  Therefore, the present invention has been proposed in view of the above-described circumstances, and a mobile communication system or the like that can efficiently acquire information desired by a user even when the wireless communication area is exceeded. The purpose is to provide.

  The present invention is a mobile communication system that performs wireless communication between a plurality of mobile communication devices and communicates service information between the mobile communication devices. In the present invention, the mobile communication device requests a transmission of service information by specifying a service identifier, storage means for storing service identifier for identifying service information and service information associated with the service identifier. Request means for transmitting a service request, information receiving means for receiving service information and storing it in the storage means, and whether a service identifier included in the service request is stored in the storage means when the service request is received If the service identifier is stored, it is determined whether the service information associated with the service identifier is stored in the storage means, and the service information is stored. Comprises information transmitting means for transmitting the service information to the mobile communication device that has transmitted the service request.

  In the present invention, it is desirable that the information transmission means includes request transfer means for transferring the received service request to another mobile communication device when service information is not stored.

  Further, in the present invention, the information transmission means has an address table including a transmission source address of the mobile communication device that transmitted the service request and a transfer destination address of the mobile communication device that transferred the service request. When the service request is transferred by the transfer means, the transmission source address and the transfer destination address are stored in the address table, and when the service information is received from the transfer destination mobile communication device, the address table is referred to. It is desirable to send service information to the mobile communication device with the source address.

  Furthermore, in the present invention, the information transmission means may store the transmission source address and the transfer destination address in the address table and delete the transmission source address and the transfer destination address from the address table when a predetermined time has elapsed. desirable.

  Furthermore, in the present invention, it is desirable that the information transmission means regularly forwards the service request by multicast.

  Furthermore, in the present invention, it is desirable that the mobile communication device prohibits the return of service information in response to a service request when a predetermined time has elapsed since the transmission time or the reception time of the received service request.

  Furthermore, in the present invention, when the information receiving means receives the service information, it is desirable to determine whether or not the service information can be received according to the elapsed time since the service information was generated.

  Furthermore, the mobile communication system according to the present invention further includes an information transmitting device that distributes service information in association with a service identifier, and when the information receiving means receives service information from the information transmitting device, the service information If the service identifier is stored, the received service information is stored in the storage means in association with the stored service identifier. May be.

  Furthermore, the mobile communication system according to the present invention includes distance measuring means for measuring the distance between the information transmitting apparatus and itself, and the mobile communication apparatus receives distance information from the information transmitting apparatus. It is desirable to delete the service information when the distance measured by is equal to or greater than a predetermined distance.

  Furthermore, in the present invention, the information transmission means includes a distance measurement means for measuring a distance between the information transmission apparatus and itself, a source address of the mobile communication apparatus that has transmitted the service request, and a movement that has transferred the service request. Mobile device having an address table including a transfer destination address of the mobile communication device, and storing the source address and the transfer destination address in the address table when the service request is transferred by the request transfer means. If the service information is received from the address table, the service information is transmitted to the mobile communication device having the source address, and the distance measured by the distance measuring means is equal to or greater than the predetermined distance. It is desirable to delete the table.

  Furthermore, in the present invention, it is desirable that the information transmitting unit prohibits the transfer of the service request when the distance measured by the distance measuring unit is a predetermined distance or more.

  Furthermore, the mobile communication device according to the present invention includes a storage means for storing a service identifier for identifying service information and service information associated with the service identifier, and transmitting service information by designating the service identifier. Request means for transmitting a service request for requesting, information receiving means for receiving service information and storing it in the storage means, and when receiving a service request, a service identifier included in the service request is stored in the storage means. If the service identifier is stored, it is determined whether the service information associated with the service identifier is stored in the storage means, and the service information is stored. If there is, information transmission means for transmitting the service information to the service request transmission source device is provided.

  Furthermore, the present invention is a program executed by a computer incorporated in a mobile communication device, wherein a request function for requesting transmission of service information by specifying a service identifier and a service information are received. And an information reception function stored in a storage unit for storing a service identifier for identifying service information and service information associated with the service identifier, and a service included in the service request when the service request is received. It is determined whether or not the identifier is stored in the storage means, and when the service identifier is stored, it is determined whether or not the service information associated with the service identifier is stored in the storage means. If the service information is stored, the information transmitter transmits the service information to the service request transmission source device. Equip the door to the computer.

  According to the mobile communication system, the mobile communication device, and the program according to the present invention, when a service identifier and service information are stored in the mobile communication device and a service request is received, the service included in the service request It is determined whether or not an identifier is stored. If the service identifier is stored, it is determined whether or not service information associated with the service identifier is stored, and the service information is stored. If so, the service information is transmitted to the mobile communication device 1 that transmitted the service request. Thereby, according to this invention, even if it is a case where it exceeds the radio | wireless communication area of the apparatus which has service information, the information which a user desires can be acquired efficiently.

  Also, according to the present invention, when service information is not stored, the received service request is transferred to another mobile communication device, so that the other mobile communication device holds service information. The service information can be relayed to the mobile communication device that has transmitted the service request.

  Further, according to the present invention, when the service request is transferred when the service request is transferred, the transmission source address and the transfer destination address are stored in the address table, and the service information is received from the transfer destination mobile communication device. In addition, since the service information is transmitted to the mobile communication device having the source address with reference to the address table, the service information can be accurately transmitted to the mobile communication device that has transmitted the service request. Further, when service information is received after relaying a service request, it is not necessary to distribute the service information by multicast communication, and the service information can be provided efficiently.

  Furthermore, according to the present invention, when the transmission source address and the transfer destination address are stored in the address table and the predetermined time has elapsed, the transmission source address and the transfer destination address are deleted from the address table. At the same time, even when the information amount of the address table is expected to increase, it can be deleted as appropriate, and only valid information can be held in the address table.

  Furthermore, according to the present invention, since the service request is periodically transferred by multicast, the probability of acquiring the desired service information can be increased.

  Furthermore, according to the present invention, when a predetermined time has elapsed from the transmission time or the reception time of the received service request, the return of service information in response to the service request is prohibited, so that the service with a low value is provided. No information is retained. For this reason, the mobile communication system can avoid transferring unnecessary service information to other mobile communication devices.

  Furthermore, according to the present invention, when service information is received, whether or not the service information can be received is determined according to the elapsed time since the service information was generated. Even in such a case, whether or not reception is possible can be changed according to the elapsed time from the generation time. Thereby, even if a mobile communication apparatus receives the same kind of service information, the mobile communication system can select only valid information from the generation time of service information.

  Furthermore, according to the present invention, when the mobile communication device receives service information from the information transmitting device, it is determined whether or not a service identifier corresponding to the service information is stored, and the service identifier is stored. If the service information is received, the received service information is stored in association with the stored service identifier, so that the service information held by the information transmitting apparatus can be acquired.

  Furthermore, according to the present invention, when the mobile communication device receives service information from the information transmission device, the service information is deleted when the distance between the information transmission device and itself is equal to or greater than a predetermined distance. Therefore, service information that is no longer needed can be deleted.

  Furthermore, according to the present invention, when the distance between the information transmission device and the mobile communication device is equal to or greater than a predetermined distance, the address table is deleted, so that the address table that is no longer required is continuously held. You can avoid that.

  Furthermore, according to the present invention, since the transfer of service information is prohibited when the distance between the information transmission device and the mobile communication device is equal to or greater than a predetermined distance, it is possible to retain service information with a low value. Absent.

It is a block diagram which shows one functional structural example of the mobile communication apparatus in the mobile communication system shown as embodiment of this invention. FIG. 3 is a system diagram for explaining an operation example of the mobile communication system shown as the first embodiment of the present invention. 5 is a flowchart showing an operation example in which the mobile communication device acquires service information held in the information transmission device in the mobile communication system shown as the first embodiment of the present invention. 6 is a flowchart showing another example of operation in which the mobile communication device acquires service information held in the information transmission device in the mobile communication system shown as the first embodiment of the present invention. 6 is a flowchart showing another example of operation in which the mobile communication device acquires service information held in the information transmission device in the mobile communication system shown as the first embodiment of the present invention. 5 is a flowchart showing an operation example in which another mobile communication device acquires service information held in a mobile communication device in the mobile communication system shown as the first embodiment of the present invention. 5 is a flowchart showing an operation example in which another mobile communication device acquires service information held in a mobile communication device in the mobile communication system shown as the first embodiment of the present invention. 5 is a flowchart showing an operation example in which another mobile communication device acquires service information held in a mobile communication device in the mobile communication system shown as the first embodiment of the present invention. It is a system diagram explaining the operation example of the mobile communication system shown as 2nd Embodiment of this invention. In the mobile communication system shown as 2nd Embodiment of this invention, it is a flowchart which shows the operation example which another mobile communication apparatus acquires the service information which the mobile communication apparatus has. It is a figure which shows an example of the address table memorize | stored in a mobile communication apparatus. It is a figure which shows the other example of the address table memorize | stored in a mobile communication apparatus. It is a system figure explaining the operation example of the mobile communication system shown as 3rd Embodiment of this invention. In the mobile communication system shown as 3rd Embodiment of this invention, it is a flowchart which shows the operation example in which other mobile communication equipment acquires the service information which the mobile communication equipment has.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
The present invention is applied to, for example, a mobile communication system including a mobile body including the mobile communication device 1 including each unit shown in FIG. The mobile communication system performs wireless communication between a plurality of mobile communication devices 1 and exchanges service information between the mobile communication devices 1. As shown in FIG. 2, this mobile communication system is a combination of an object identifier (OID) and a service identifier (IID) of the information transmitting apparatus 2 after the information transmitting apparatus 2 distributes the service information desired by the user. The mobile communication device 1 acquires the service information (Info) specified in (1). Here, the service information is, for example, special sale information distributed from a supermarket, parking lot empty vehicle information, recommended spot information if driving in, or the like. This service information is information that the user desires to obtain. The service identifier is an ID for identifying the type of service information such as sale information.

  The information transmission device 2 is a wireless communication device installed in, for example, a supermarket or a drive-in. The information transmission device 2 includes an object identifier (OID_s) that represents the information transmission device 2 itself, a service identifier (IID_s) that classifies special sale information and parking lot empty information, and the special sale information and parking lot empty information itself. Some service information (Info_s) is stored. The information transmitting apparatus 2 has a function of distributing the stored service information by wireless communication. When the mobile communication device 1 is present in the wireless communication range (1) of the information transmitting device 2, the stored service information is transmitted to the mobile communication device 1. At this time, the information transmitting apparatus 2 transmits not only the service information (Info_s) but also the object identifier (OID_s) and the service identifier (IID_s).

  As shown in FIG. 1, the mobile communication device 1 includes a transmission / reception unit 11, a request unit 12, a determination unit 13, a distance measurement unit 14, a storage unit 15, and a data setting unit 16. In the mobile communication device 1, the storage unit 15 includes a hard disk device, an internal memory, and the like. The transmission / reception unit 11, the request unit 12, the determination unit 13, the distance measurement unit 14, and the storage unit 15 are realized by executing various programs and a CPU that controls the hardware execute predetermined programs.

  The storage unit 15 stores a service identifier for identifying the type of service information and service information associated with the service identifier. The information stored in the storage unit 15 is transmitted from the information transmission device 2 or another mobile communication device 1. The storage unit 15 preferably holds a plurality of service identifiers as initial settings in advance. For example, a plurality of service identifiers are already stored at the time of manufacture and shipment (manufacturer shipment). Even at times other than the initial setting, the user can add a service identifier by updating the software of the mobile communication device 1 or the like.

  The transmission / reception unit 11 receives service information transmitted from the information transmission device 2 or another mobile communication device 1 and stores the service information in the storage unit 15. In addition, the transmission / reception unit 11 transmits service information to other mobile communication devices 1. Further, the transmission / reception unit 11 receives a service request for requesting service information from another mobile communication device 1 and transfers the service request to the other mobile communication device 1.

  Note that the service information reception processing by the transmission / reception unit 11 includes not only reception through communication, but also direct storage of scenery data taken by the user manually in the storage unit 15.

  The data setting unit 16 stores the service information received by the transmission / reception unit 11 in the storage unit 15. At this time, the data setting unit 16 sets and stores the service information in the storage unit 15 in association with the service identifier.

  The request unit 12 transmits a service request that specifies a service identifier and requests transmission of service information. At this time, the request unit 12 transmits a service request from the transmission / reception unit 11.

  The determination unit 13 determines whether to transmit the service information stored in the storage unit 15 to the other mobile communication device 1 when the transmission / reception unit 11 receives a service request from the other mobile communication device 1. To do. The determination unit 13 determines whether or not a service identifier (IID) included in the received service request is stored in the storage unit 15. If the service identifier (IID) included in the service request is stored, it is determined whether or not the service information (Info) associated with the service identifier (IID) is stored in the storage unit 15. To do. When the service information (Info) is stored, the service information is transmitted to the mobile communication device 1 that has transmitted the service request. At this time, the determination unit 13 reads the service information to be transmitted from the storage unit 15 and causes the transmission / reception unit 11 to transmit the service information.

  The distance measurement unit 14 measures the distance between the information transmission device 2 and itself. As a distance measuring method by the distance measuring unit 14, there is a method for calculating a difference between the position of the information transmitting apparatus 2 using GPS and its own position.

  Such a mobile communication device 1 is in a state where it can receive service information transmitted from the information transmission device 2 when it exists within the wireless communication range (1) of the information transmission device 2. When the mobile communication device 1 stores a service identifier (IID_s) that identifies service information desired by the user in the storage unit 15, the mobile communication device 1 adds the service identifier and the service information transmitted from the information transmission device 2. Compared with the service identifier (IID_s). When both service identifiers (IID_s) match, the mobile communication device 1 receives the service information because it is service information that the user wants to browse. Thereby, the data setting unit 16 can store the object identifier (OID_s), the service identifier (IID_s), and the service information (Info) in the storage unit 15.

  As described above, the process of acquiring the service information by the mobile communication device 1 is a procedure as shown in FIGS. 3 to 5, for example. Hereinafter, a description will be given with reference to the scene of FIG.

  In the information acquisition procedure of FIG. 3, first, the information transmission device 2 requests the mobile communication device 1 to search for the mobile communication device 1 having the service identifier (IID_s) specified by the information transmission device 2 (device search). Request) S1 and S2 are transmitted. At this time, the information transmitting apparatus 2 transmits the device search requests S1 and S2 by multicast communication within its own wireless communicable range (1). For example, when the information transmission apparatus 2 is a supermarket, a device search request including a service identifier (IID_s) indicating sale information is multicast.

  On the other hand, the mobile communication device 1 (B) that does not have the service identifier (IID_s) of the sale information receives the device search request S1 including the service identifier (IID_s). The mobile communication device 1 (B) determines that the service identifier (IID_s) is not held by referring to the service identifier (IID_s) stored in the storage unit 15, and the device search request S1. No response is made to (ST1). That is, when the mobile communication device 1 receives a service request and does not have a service identifier related to the service request, the mobile communication device 1 ignores the request.

  On the other hand, when the mobile communication device 1 (A) having the service identifier (IID_s) of the sale information receives the device search request S2, the mobile communication device 1 (A) receives the service information (Info) held by the information transmission device 2. Therefore, the response S3 is transmitted to the information transmitting apparatus 2. On the other hand, the information transmitting apparatus 2 delivers service information (Info) S4 to the mobile communication device 1 (A) to the mobile communication device 1 (A). Here, an object identifier (OID_s) and a service identifier (IID_s) are also added to the service information (Info). Thereby, the mobile communication device 1 (A) can acquire the service information (Info) transmitted from the information transmitting device 2 (ST2).

  As another information acquisition procedure, as shown in FIG. 4, service information (Info) S <b> 4 is distributed by multicast communication from the information transmission apparatus 2 to the wireless communication possible range (1). Here, an object identifier (OID_s) and a service identifier (IID_s) are added to the service information (Info). Since the mobile communication device 1 (B) does not have the service identifier (IID_s) corresponding to the received service information (Info), the mobile communication device 1 (B) discards the service information (Info) (ST1). On the other hand, since the mobile communication device 1 (A) has the service identifier (IID_s) corresponding to the received service information (Info), the mobile communication device 1 (A) receives the service information (Info) (ST2).

  As yet another information acquisition procedure, as shown in FIG. 5, the mobile communication device 1 (B) that does not have the service identifier (IID_s) does not transmit an information request for service information (Info). On the other hand, the mobile communication device 1 (A) having the service identifier (IID_s) uses the service identifier (IID_s) stored in its storage unit 15 and uses the service identifier (OID_s) and the service identifier (IID_s). The information request S5 is transmitted to the information transmitting device 2. When the mobile communication device 1 (A) is present in the wireless communication range (1) of the information transmission device 2, the mobile communication device 1 (A) returns the service information returned from the information transmission device 2. S6 can be received (ST2).

  In the information acquisition procedure described above, the interval at which the information transmission device 2 in FIG. 3 transmits the device search request S1, the interval at which the information transmission device 2 in FIG. 4 distributes the service information S4, the mobile communication device 1 in FIG. The interval at which (A) transmits the service information request S5 can be arbitrarily changed.

  As shown in FIG. 2, the mobile communication device 1 (A) that has acquired the service information moves, moves out of the wireless communication range (1) of the information transmission device 2, and the mobile communication device 1 (A) Suppose that the mobile communication device 1 (X) has moved within the wireless communicable range (2) (A ′). In this case, the mobile communication device 1 (X) can receive service information (Info) from the mobile communication device 1 (A). At this time, the mobile communication device 1 (A) operates in the same manner as the information transmitting apparatus 2 in FIGS. 3 to 5, and the mobile communication device 1 (X) is the mobile communication device in FIGS. 1 (A) performs the same operation, and the mobile communication device 1 (Y) performs the same operation as the mobile communication device 1 (B) in FIGS. The operations of the mobile communication device 1 (A), the mobile communication device 1 (X), and the mobile communication device 1 (Y) corresponding to FIGS. 3 to 5 are shown in FIGS.

  Further, even if the mobile communication device 1 (X) exists in the wireless communicable range (2), the mobile communication device 1 (Y) receives the service identifier (IID_s) requested by the mobile communication device 1 (X). ) Is not owned. Accordingly, the mobile communication device 1 (Y) does not perform the same operation as the information transmission device 2 in FIGS. In this information acquisition procedure, the interval at which the mobile communication device 1 (A) in FIG. 3 transmits the device search request S1, the interval at which the mobile communication device 1 (A) in FIG. 4 delivers the service information S4, The interval at which the mobile communication device 1 (X) 5 transmits the service information request S5 can be arbitrarily changed.

  There may be a plurality of mobile communication devices 1 that store desired service information (Info) in the wireless communicable range (2) of the mobile communication device 1 (X) that requests the service information (Info). In this case, the mobile communication device 1 (X) may receive service information (Info) from a plurality of mobile communication devices 1. On the other hand, the mobile communication device 1 (X) selects the latest service information (Info) based on the information update time and distribution time included in the service information (Info), and stores it by the data setting unit 16. Store in the unit 15.

  Further, the information distributed from the mobile communication device 1 (A) to the mobile communication device 1 (X) is limited to the service information (Info) acquired by the mobile communication device 1 (A) from the information transmitting device 2. Absent. That is, it is assumed that service information (Info) of a photograph taken by the user is stored in the storage unit 15 of the mobile communication device 1 (A) in correspondence with the service identifier (IID_s) of the tourist spot. In this case, when the mobile communication device 1 (A) has a function of distributing service information (Info), the mobile communication device 1 (X) specifies the service identifier (IID_s) of the tourist spot. Deliver service requests. On the other hand, the mobile communication device 1 (A) transmits photo service information (Info) corresponding to the service identifier (IID_s) of the sightseeing spot to the mobile communication device 1 (X). Thereby, the mobile communication apparatus 1 (X) can acquire the photograph of a sightseeing spot from the mobile communication apparatus 1 (A).

  As described above, according to the mobile communication system shown as the first embodiment of the present invention, when a service identifier and service information are stored in the mobile communication device 1 and a service request is received, It is determined whether or not a service identifier included in the service request is stored. If the service identifier is stored, it is determined whether or not service information associated with the service identifier is stored. When the service information is stored, the service information is transmitted to the mobile communication device 1 that has transmitted the service request.

  Thereby, according to the mobile communication system, even when the mobile communication device 1 comes out of the wireless communication range (1) of the information transmitting device 2, the other mobile communication device 1 having the same service identifier is used. Service information can be provided. On the other hand, according to the mobile communication system, service information can be acquired from the mobile communication device 1 that has acquired service information from the information transmission apparatus 2 even outside the information transmission apparatus 2. According to such a mobile communication system, even if the mobile communication device 1 exceeds the wireless communication range (1) of the information transmitting device 2, it is possible to efficiently acquire information desired by the user. it can.

  In addition, this mobile communication system can acquire service information from the information transmitting apparatus 2 as well as transmitting and receiving service information between the mobile communication devices 1. When the mobile communication device 1 receives service information from the information transmitting device 2, it determines whether or not the service identifier corresponding to the service information is stored, and stores the service identifier. The received service information is stored in association with the stored service identifier. As a result, the mobile communication device 1 can acquire service information having the same service identifier as the service identifier held in the information transmitting apparatus 2 even when the mobile communication apparatus 1 exists in the wireless communication range of the information transmitting apparatus 2.

  Furthermore, the mobile communication device 1 includes a distance measurement unit 14 that measures the distance between the information transmission device 2 and itself. Accordingly, when the mobile communication device 1 receives service information from the information transmitting device 2, the mobile communication device 1 deletes the service information when the distance measured by the distance measuring unit 14 is equal to or greater than a predetermined distance. This is because it is considered that the service information distributed from the information transmitting apparatus 2 is not used once the information transmitting apparatus 2 has left the wireless communicable range. Thereby, the mobile communication device 1 can delete service information that is no longer necessary.

[Second Embodiment]
Next, a mobile communication system according to the second embodiment will be described. In addition, about the part similar to the above-mentioned 1st Embodiment, the detailed description is abbreviate | omitted by attaching | subjecting the same code | symbol.

  In the mobile communication system shown as the second embodiment, when the mobile communication device 1 that has received a service request does not store service information corresponding to the service request, the mobile communication device 1 transmits the received service request to another mobile unit. It is transferred (routed) to the communication device. As a result, the mobile communication system searches not only the mobile communication device 1 that can directly communicate with the mobile communication device 1 that transmitted the service request, but also the service information held by another mobile communication device 1. To do.

  In this mobile communication system, it is desirable that the mobile communication device 1 includes an address table that describes the transmission source and transmission destination of the service request in order to accurately provide service information for the service request. In this case, the mobile communication device 1 has an address table including the source address of the other mobile communication device 1 that has transmitted the service request and the transfer destination address of the other mobile communication device 1 that has transferred the service request. Have When the mobile communication device 1 transfers the service request, the mobile communication device 1 stores the transmission source address and the transfer destination address in the address table, and when the service information is received from the transfer destination mobile communication device 1, The service information is transmitted to the mobile communication device 1 having the source address with reference to the address table.

  As shown in FIG. 9, it is assumed that the mobile communication device 1 (X) that desires to provide service information enters the wireless communicable range (2) of the mobile communication device 1 (B). Here, the mobile communication device 1 (B) has a service identifier (IID_s) but does not have an object identifier (OID_s) or service information (Info_s). In this state, the mobile communication device 1 (A) that has received the service information from the information transmission device 2 and stored in the storage unit 15 exits the wireless communication range (1) of the information transmission device 2 and performs mobile communication. Consider a scene in which the wireless communication range (1) of the device 1 (B) has entered. In addition, there is another mobile communication device 1 (C) that does not have service information (Info_s) in the wireless communication range (2) of the mobile communication device 1 (B).

  In such a situation, even if the mobile communication device 1 (B) does not have service information (Info_s), the mobile communication device 1 (X) is connected to the mobile communication device 1 (X) via the mobile communication device 1 (A). Service information (Info_s) is provided. For this reason, the mobile communication system performs the operation as shown in FIG.

  First, the mobile communication device 1 (X) sends a device search request S11 for searching for the mobile communication device 1 that has the service identifier (IID_s) for the service information (Info_s) that it wants to acquire by multicast communication. To deliver. And this apparatus search request | requirement S11 is acquired by the mobile communication apparatus 1 (B) which exists in the radio | wireless communicable range (3) of the mobile communication apparatus 1 (X). In response to receiving the device search request S11, the mobile communication device 1 (B) sends a response R11 for holding the service identifier (IID_s) included in the device search request S11 to the mobile communication device 1 (X )

  Next, the mobile communication device 1 (X) receives a response R11 from the mobile communication device 1 (B), and the request unit 12 requests a service request for transmitting specified service information (Info_s). S12 (OID_s, IID_s, Info_s) is transmitted to the mobile communication device 1 (B). When the mobile communication device 1 (B) receives the service request S12, the determination unit 13 determines that the service information (Info_s) corresponding to the service identifier (IID_s) of the service request S12 is not stored ( ST11). For this reason, the mobile communication device 1 (B) distributes a device search request for searching for the mobile communication device 1 having the service identifier (IID_s) designated in the service request S12 by multicast communication. This device search request is sent to the device search request S13, by the mobile communication device 1 (A) and the mobile communication device 1 (C) existing within the wireless communication range (2) of the mobile communication device 1 (B). Received as S14.

  The mobile communication device 1 (B) holds the service identifier included in the service request, but transfers the service request when the service information is not stored. However, if there is no service identifier included in the service request and the service request is ignored, the service request transfer process is not performed.

  In the mobile communication device 1 (C), the determination unit 13 determines whether the service identifier (IID_s) included in the device search request S13 is stored in the storage unit 15. Since the mobile communication device 1 (C) stores the service identifier (IID_s), the mobile communication device 1 (C) returns a response R13 to that effect to the mobile communication device 1 (B). Similarly, in the mobile communication device 1 (A), the determination unit 13 determines whether the service identifier (IID_s) included in the device search request S <b> 14 is stored in the storage unit 15. Since the service identifier (IID_s) is stored, the mobile communication device 1 (A) returns a response R14 to that effect to the mobile communication device 1 (B).

  Next, the mobile communication device 1 (B) transmits a service request S15 to the mobile communication device 1 (C) in response to receiving the response R13 returned from the mobile communication device 1 (C). Here, the mobile communication device 1 (B) receives the service request including the same object identifier (OID_s), service identifier (IID_s), and service information (Info_s) as the service request S12 received from the mobile communication device 1 (X). S15 is transmitted. Thereby, the mobile communication device 1 (B) can transfer the service request S12 received from the mobile communication device 1 (X) as the service request S15. Similarly, mobile communication device 1 (B) transmits service request S16 to mobile communication device 1 (A) in response to receiving response R14 returned from mobile communication device 1 (A). . Here, the mobile communication device 1 (B) receives the service request including the same object identifier (OID_s), service identifier (IID_s), and service information (Info_s) as the service request S12 received from the mobile communication device 1 (X). S16 is transmitted. Thereby, the mobile communication device 1 (B) can transfer the service request S12 received from the mobile communication device 1 (X) as the service request S16.

  When the mobile communication device 1 (C) receives the service request S15 from the mobile communication device 1 (B), the determination unit 13 uses the service information (Info_s) of the object identifier (OID_s) included in the service request S15. It is determined whether or not it is memorized. As a result, the mobile communication device 1 (X) determines that the service information (Info_s) is not held by the determination unit 13 and ends the process.

  Meanwhile, the determination unit 13 determines that the mobile communication device 1 (A) has the service information (Info_s) of the object identifier (OID_s) included in the service request S16. Then, the mobile communication device 1 (A) reads the service information (Info_s) from the storage unit 15 and returns the service information (Info_s) R16 to the mobile communication device 1 (B).

  Thereby, the mobile communication apparatus 1 (B) can acquire service information (ST13). Next, the mobile communication device 1 (B) returns the service information R16 transmitted from the mobile communication device 1 (A) to the service information R12 in response to the service request S12 transmitted from the mobile communication device 1 (X). To the mobile communication device 1 (X). Thereby, the mobile communication apparatus 1 (X) can acquire service information (ST14). Thereby, according to the mobile communication system, even if the mobile communication device 1 that owns the service information requested by itself does not exist in the wireless communication possible range of the mobile communication device 1 that requests acquisition of the service information. The service request can be transferred by another mobile communication device 1.

  Further, in the mobile communication system that transfers the service request in this way, it is desirable to provide an address table as shown in FIG. 11 in the mobile communication device 1 that relays the service request. This address table has acquired the service information as the partner information (A) from which the service request was acquired, the time when the service request was acquired as the partner information (X), the IP address, the object identifier (OID_x), Includes time, IP address, and object identifier (OID_A). Here, the mobile communication device 1 that relays the service request creates an address table for each object identifier (OID_s) such as a supermarket, for example, for each service identifier (IID_s) such as sale information.

  In this example, the mobile communication device 1 holding the address table is only the mobile communication device 1 (B), and the mobile communication device 1 (B) only relays the service request once. is there. However, the mobile communication device 1 that relays the service request may be a plurality of mobile communication devices 1. That is, a plurality of mobile communication devices 1 that transfer service requests because they do not have service information may exist as intermediate nodes. In this case, even if the mobile communication device 1 (B) does not have the service identifier (IID_s), another mobile communication device 1 acquires a combination of the object identifier (OID_s) and the service identifier (IID_s). As a result, the service request can be relayed.

  Note that the address table may be changed with time because the request of the mobile communication device 1 (X) may change or the service information desired by the mobile communication device 1 (X) may change. desirable. Specifically, the mobile communication device 1 (B) stores the transmission source address and the transfer destination address in the address table and deletes the transmission source address and the transfer destination address from the address table when a predetermined time has elapsed. It is desirable to do.

  Here, when there are many mobile communication devices 1 around, a large amount of information is registered in the address table of the mobile communication device 1 as time passes. On the other hand, information whose predetermined time has elapsed is deleted from the address table. At this time, the mobile communication device 1 refers to the time when the service request shown in FIG. 11 is acquired and the time when the service information is acquired, and deletes the information when a predetermined time has elapsed. . This operation refers to an internal timer of the mobile communication device 1 or a time acquired from a center server (not shown), etc., when a predetermined time elapses from either the time when the service request is received or the time when the service information is received. Delete information with. Thereby, it is possible to avoid registering a large amount of information in the address table of each mobile communication device 1.

  As described above, according to the mobile communication system shown as the second embodiment, even if the mobile communication device 1 that has received the service request does not have service information, the mobile communication device 1 can provide services to other mobile communication devices 1. Can forward requests. Thereby, when the other mobile communication device 1 has service information, the service information can be relayed and the service information can be provided to the mobile communication device 1 that has transmitted the service request.

  Moreover, according to this mobile communication system, the mobile communication device 1 that has transferred the service request holds the address table. Thereby, the service information can be accurately transmitted to the mobile communication device 1 that has transmitted the service request. Further, when service information is received after relaying a service request, it is not necessary to distribute the service information by multicast communication, and the service information can be provided efficiently.

  Further, according to this mobile communication system, when the transmission source address and the transfer destination address are stored in the address table and a predetermined time has elapsed, the transmission source address and the transfer destination address are deleted from the address table. As a result, even when the amount of information in the address table is expected to increase with the passage of time, it can be deleted as appropriate, and only valid information can be held in the address table.

  Furthermore, according to this mobile communication system, in FIG. 10, the mobile communication device 1 (B) distributes device search requests S13 and S14 of the mobile communication device 1 having the service identifier (IID_s) by multicast. If the responses R13 and R14 are not obtained, the service request may be periodically multicast. Here, although depending on the communicable range (2) of the mobile communication device 1 (B), the mobile communication device having service information (Info_s) corresponding to the service identifier (IID_s) by a single device search request. The possibility of finding 1 is not high. Therefore, when the mobile communication device 1 (B) receives a service request, the probability that the target service information is acquired can be increased by periodically multicasting the service request.

  Furthermore, in this mobile communication system, the mobile communication device 1 prohibits the return of service information in response to the service request when a predetermined time has elapsed from the transmission time or the reception time of the received service request. It is desirable. For example, the mobile communication device 1 that has received the service request prohibits the return of the service information in response to the service request when the time at which the service information is received has passed a predetermined time from the transmission time of the service request. . In addition, when the mobile communication device 1 requests service information, it is preferable that a predetermined time during which the return of service information is prohibited can be set. For example, the mobile communication device 1 can change the time for returning service information for each type of service information. Specifically, when the service information is event information for several days such as an amusement park, a predetermined time of about 3 days is set. If the service information is a retail store time service, a predetermined time of about 6 hours is set. In addition, as a method of setting the predetermined time, it may be set in the initial setting or may be determined according to the user's preference. As another method, the mobile communication device 1 that has received the service request stores the service identifier (IID_s) of the service request and the address information of the mobile communication device that has transmitted the service request, and measures the elapsed time. To do. When the mobile communication device 1 that has received the service information has received a service request for the service request when a predetermined time or more has elapsed since the time at which the service request was first received, Service information is not returned to the mobile communication device.

  In addition, it is desirable for the mobile communication device 1 to be able to set a predetermined time during which the return of service information is prohibited in the mobile communication device 1 that requests service information. For example, the mobile communication device 1 can change the time for transferring service information for each type of service information. Specifically, when the service information is event information for several days such as an amusement park, a predetermined time of about 3 days is set. If the service information is a retail store time service, a predetermined time of about 6 hours is set. In addition, as a method of setting the predetermined time, it may be set in the initial setting or may be determined according to the user's preference.

  Then, the mobile communication device 1 deletes the service information. At this time, the mobile communication device 1 deletes the service identifier (IID_s) and the object identifier (OID_s) in addition to the service information. As a result, the mobile communication system does not retain service information (Info_s) whose value has been lowered after a certain amount of time has elapsed since the service information (Info_s) was acquired. For this reason, the mobile communication system can avoid transferring unnecessary service information (Info_s) to other mobile communication devices 1.

  Furthermore, in this mobile communication system, when service information is received by the mobile communication device 1, whether or not the service information can be received may be determined according to the elapsed time since the service information was generated. . Such a mobile communication system needs to add the generation time of the service information to the service information. When the mobile communication device 1 acquires the service information, the determination unit 13 determines the generation time of the service information and determines whether or not reception is possible. For example, as shown in FIG. 9, the mobile communication device 1 (X) may obtain service information from a plurality of mobile communication devices 1. In this case, the mobile communication device 1 can change the availability of reception depending on the elapsed time from the generation time even for service information that changes from moment to moment, such as parking space availability information and traffic jam information.

  Further, the elapsed time for determining whether or not service information can be received can be set in the mobile communication device 1 that requests the service information. Specifically, as in the case of the transfer of the service request described above, when the service information is event information for several days such as an amusement park, a predetermined time of about 3 days is set, and the service information is stored in the retail store. In the case of a time service, a predetermined time of about 6 hours is set. In addition, as a method of setting the predetermined time, it may be set in the initial setting or may be determined according to the user's preference. Further, it is desirable that the elapsed time for determining whether or not the service information can be received is determined by the transmission source of the service information.

  Thereby, even if the mobile communication device 1 receives the same type of service information, the mobile communication system can select only valid information from the generation time of the service information.

  Further, when the mobile communication device 1 transfers the service request to the information transmitting device 2 and receives the service information, the mobile communication device 1 displays the address table when the distance measured by the distance measuring unit 14 is equal to or greater than a predetermined distance. delete. As a result, the mobile communication device 1, for example, as shown in FIG. 12, the time when the service request is acquired as the partner information (X) that requested the service information, the IP address, the object identifier (OID_x), the mobile communication device 1 point, the time when the service information as the partner information (A) from which the service information was acquired, the IP address, the object identifier (OID_A), and the point are included. Thereby, even if the mobile communication device 1 creates an address table in response to the service request, if the mobile communication device 1 leaves the point from the mobile communication device 1 or the information transmission device 2 that has made the service request, Can be deleted. As a result, the mobile communication device 1 can avoid holding the address table that no longer needs to be held.

[Third Embodiment]
Next, a mobile communication system according to a third embodiment will be described. Note that parts similar to those in the above-described embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 13, the mobile communication system shown as the third embodiment further includes a transfer transmission device 3 that can communicate with the mobile communication device 1. The transfer transmission device 3 is a fixed wireless routing device such as a hot spot. In this mobile communication system, the mobile communication device 1 transfers service information to the transfer transmitting device 3 with priority over other mobile communication devices 1.

  Here, in the mobile communication system according to the second embodiment described above, when the mobile communication device 1 becomes an intermediate node and another mobile communication device 1 having service information is found, the service information is provided. It was. However, even if a service request is transferred between the mobile communication devices 1, there is a high possibility that a communication failure occurs due to communication interruption due to an obstacle, and there is a situation where reliability cannot be increased.

  Therefore, the mobile communication system includes a transfer transmission device 3 that transfers service information. Thereby, when the mobile communication device 1 (A) having the service information enters the wireless communication range (2) of the transfer transmission device 3, the service information can be supplied to the transfer transmission device 3. The transfer transmission device 3 can provide the service information to the mobile communication device 1 when the service information is requested.

  As shown in FIG. 14, such a mobile communication system first transmits a device search request for the mobile communication device 1 having a service identifier (IID_s) by multicast transmission using the transfer transmission device 3. This device search request is received as a device search request S21 by the mobile communication device 1 (A) existing in the wireless communication range (2) of the transfer transmission device 3.

  Also, the mobile communication device 1 (B) desiring to acquire service information transmits a device search request S22 of the mobile communication device 1 having the service identifier (IID_s) by multicast communication. This device search request is received as a device search request S22 by the mobile communication device 1 (A) existing in the wireless communication range (1) of the mobile communication device 1 (B).

  When this device search request S21 is received by the mobile communication device 1 (A), the mobile communication device 1 (A) refers to the object identifier (OID_t), MAC address or IP address included in the device search request S21. , It recognizes that the transmission source is the transfer transmission device 3. When the mobile communication device 1 (A) has service information corresponding to the service identifier (IID_s) included in the device search request S21 transmitted from the transfer transmitting device 3, the mobile communication device 1 (A) transfers the response R21. A reply is sent to the transmission device 3. Similarly, when the device search request S22 is received by the mobile communication device 1 (A), the mobile communication device 1 (A) refers to the object identifier (OID_d), MAC address, or IP address included in the device search request S22. Then, it is recognized that the transmission source is the mobile communication device 1 (B). When the mobile communication device 1 (A) has service information corresponding to the service identifier (IID_s) included in the device search request S22 transmitted from the mobile communication device 1 (B), A response R22 is returned to the mobile communication device 1 (B).

  Upon receiving the response 21, the transfer transmission device 3 transmits a service request S23 to the mobile communication device 1 (A). At this time, the transfer transmission device 3 generates a service request S23 including an object identifier (OID_s), a service identifier (IID_s), and service information (Info_s). Similarly, when the mobile communication device 1 (B) receives the response 22, the mobile communication device 1 (B) transmits a service request S24 to the mobile communication device 1 (A). At this time, the mobile communication device 1 (B) generates a service request S24 including an object identifier (OID_s), a service identifier (IID_s), and service information (Info_s).

  Next, mobile communication device 1 (A) determines whether or not the service request transmission source device is transfer transmission device 3 by means of determination unit 13 (ST21). At this time, the determination unit 13 determines the transmission source device based on the MAC address and IP address included in the service request. Then, the mobile communication device 1 (A) can recognize from the information included in the service request S23 that the transmission source of the service request S23 is the transfer transmission device 3. Here, the IP address of the transfer transmission device 3 is often a fixed address. Therefore, it can be determined as the transfer transmission device 3 based on the address information.

  Next, the mobile communication device 1 (A) prioritizes the transfer transmission device 3 over the mobile communication device 1 (B) for determining that the transmission source of the service request S23 is the transfer transmission device 3. Service information R23 is returned (ST22). Thereby, the transfer transmission apparatus 3 can acquire service information (ST23). Thereafter, the mobile communication device 1 (A) transmits service information R24 to the mobile communication device 1 (B). Thereby, the mobile communication apparatus 1 (B) can acquire service information (ST24).

  As described above, according to the mobile communication system shown as the third embodiment, the mobile communication device 1 is further provided with the transfer transmission device 3 that can communicate with the mobile communication device 1, and the transfer is prioritized over other mobile communication devices. Service information is transmitted to the transmitting device. Thereby, according to the mobile communication system, the service information can be provided from the transfer transmission device 3 to the mobile communication device 1 that requests the service information due to a communication failure caused by the movement of the mobile communication device 1. Therefore, according to the mobile communication system, the reliability for providing service information can be improved.

  The above-described embodiment is an example of the present invention. For this reason, the present invention is not limited to the above-described embodiment, and various modifications can be made depending on the design and the like as long as the technical idea according to the present invention is not deviated from this embodiment. Of course, it is possible to change.

DESCRIPTION OF SYMBOLS 1 Mobile communication apparatus 2 Information transmission apparatus 3 Transfer transmission apparatus 11 Transmission / reception part 12 Request part 13 Judgment part 14 Distance measurement part 15 Storage part 16 Data setting part

Claims (14)

A mobile communication system that performs wireless communication between a plurality of mobile communication devices and communicates service information between the mobile communication devices,
The mobile communication device is:
Storage means for storing a service identifier for identifying the service information, and service information associated with the service identifier;
Requesting means for transmitting a service request for requesting transmission of service information by designating the service identifier;
Information receiving means for receiving the service information and storing it in the storage means;
When the service request is received, it is determined whether or not the service identifier included in the service request is stored in the storage unit. If the service identifier is stored, the service identifier is associated with the service identifier. Information transmitting means for determining whether or not the stored service information is stored in the storage means and transmitting the service information to the mobile communication apparatus that has transmitted the service request when the service information is stored A mobile communication system comprising:   The movement according to claim 1, wherein the information transmission means includes request transfer means for transferring the received service request to another mobile communication device when the service information is not stored. Body communication system. The information transmitting means includes
An address table including a source address of the mobile communication device that has transmitted the service request and a transfer destination address of the mobile communication device that has transferred the service request;
When the service request is transferred by the request transfer means, the source address and the transfer destination address are stored in the address table, and when the service information is received from the transfer destination mobile communication device, the address table is The mobile communication system according to claim 2, wherein service information is transmitted to the mobile communication device having the source address with reference to the mobile communication device.   The information transmission unit stores the transmission source address and the transfer destination address in the address table, and deletes the transmission source address and the transfer destination address from the address table when a predetermined time has elapsed. 4. The mobile communication system according to 3.   The mobile communication system according to any one of claims 2 to 4, wherein the information transmitting unit periodically transfers the service request by multicast.   The mobile communication device prohibits the return of service information in response to a service request when a predetermined time has elapsed since the transmission time or the reception time of the received service request. Item 6. The mobile communication system according to any one of Item 5.   7. The mobile communication system according to claim 6, wherein the predetermined time can be set by a mobile communication device that requests the service information.   The information receiving means, when receiving the service information, determines whether or not the service information can be received according to an elapsed time since the service information was generated. The mobile communication system according to any one of the above. An information transmission device that distributes service information in association with a service identifier;
When receiving the service information from the information transmitting device, the information receiving unit determines whether or not the service identifier corresponding to the service information is stored, and if the service identifier is stored, The mobile communication system according to any one of claims 1 to 8, wherein the received service information is stored in the storage unit in association with the stored service identifier. A distance measuring means for measuring the distance between the information transmitting device and itself;
The mobile communication device, when receiving service information from the information transmitting device, deletes the service information when the distance measured by the distance measuring means is a predetermined distance or more. Item 10. The mobile communication system according to Item 9. A distance measuring means for measuring the distance between the information transmitting device and itself;
The information transmission means has an address table including a transmission source address of a mobile communication device that has transmitted the service request and a transfer destination address of the mobile communication device that has transferred the service request;
When the service request is transferred by the request transfer means, the source address and the transfer destination address are stored in the address table, and when the service information is received from the transfer destination mobile communication device, the address table is Referencing, transmitting service information to the mobile communication device of the source address,
11. The mobile communication system according to claim 9, wherein the address table is deleted when a distance measured by the distance measuring unit is a predetermined distance or more.   12. The information transmitting unit according to claim 9, wherein the information transmitting unit prohibits transfer of service information when the distance measured by the distance measuring unit is a predetermined distance or more. Mobile communication system. Storage means for storing a service identifier for identifying service information, and service information associated with the service identifier;
Requesting means for transmitting a service request for requesting transmission of service information by designating the service identifier;
Information receiving means for receiving the service information and storing it in the storage means;
When the service request is received, it is determined whether or not a service identifier included in the service request is stored in the storage unit. If the service identifier is stored, the service identifier is associated with the service identifier. Information transmission means for determining whether or not the stored service information is stored in the storage means and transmitting the service information to the transmission source device of the service request when the service information is stored. A mobile communication device. A program executed by a computer incorporated in a mobile communication device,
A request function for transmitting a service request for requesting transmission of service information by specifying a service identifier;
An information reception function for receiving the service information and storing the service identifier for identifying the service information and the storage unit for storing the service information associated with the service identifier;
When the service request is received, it is determined whether or not a service identifier included in the service request is stored in the storage unit. If the service identifier is stored, the service identifier is associated with the service identifier. An information transmission function for determining whether or not the stored service information is stored in the storage means and transmitting the service information to the service request transmission source device if the service information is stored. A mobile communication program characterized by being prepared for.

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