WO2022254998A1 - 制御方法、サーバ装置、プログラム及びデータ配信システム - Google Patents
制御方法、サーバ装置、プログラム及びデータ配信システム Download PDFInfo
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- WO2022254998A1 WO2022254998A1 PCT/JP2022/018591 JP2022018591W WO2022254998A1 WO 2022254998 A1 WO2022254998 A1 WO 2022254998A1 JP 2022018591 W JP2022018591 W JP 2022018591W WO 2022254998 A1 WO2022254998 A1 WO 2022254998A1
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000004891 communication Methods 0.000 claims abstract description 101
- 238000012545 processing Methods 0.000 claims description 125
- 230000005540 biological transmission Effects 0.000 claims description 51
- 238000012546 transfer Methods 0.000 claims description 31
- 238000010586 diagram Methods 0.000 description 14
- 239000000470 constituent Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 208000013407 communication difficulty Diseases 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/123—Traffic control systems for road vehicles indicating the position of vehicles, e.g. scheduled vehicles; Managing passenger vehicles circulating according to a fixed timetable, e.g. buses, trains, trams
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Information and communication technology [ICT] specially adapted for implementation of business processes of specific business sectors, e.g. utilities or tourism
- G06Q50/40—Business processes related to the transportation industry
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/021—Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W4/46—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for vehicle-to-vehicle communication [V2V]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/04—Terminal devices adapted for relaying to or from another terminal or user
Definitions
- the present disclosure relates to technology for distributing data to multiple moving bodies.
- wireless communication is performed between a plurality of mobile units and a server device in a sharing service in which multiple mobile units are shared. For example, it is known to transmit information indicating the current state of each mobile device to a server device and manage the state of each mobile device in the server device.
- a server device it is known to transmit information indicating the current state of each mobile device to a server device and manage the state of each mobile device in the server device.
- wireless communication may not be possible between the mobile unit and the server device.
- Patent Document 1 when the vehicle is out of the communication range with the server, the vehicle information indicating the current state of the vehicle is transmitted to other nearby vehicles by inter-vehicle communication, and the other vehicle It has been proposed to receive vehicle information of the other vehicle from the company. Then, it has been proposed that when a vehicle moves into a communication range with a server, it transmits to the server its own vehicle information and the vehicle information of other vehicles received outside the communication range.
- Patent Document 1 there is a problem that data to be delivered to other vehicles cannot be delivered to other vehicles outside the communication range with the server.
- the present disclosure has been made to solve the above problems, and provides a control method, a server device, a program, and a data distribution system capable of distributing distribution data to a mobile unit that cannot perform wireless communication. intended to present.
- a computer acquires schedule information indicating a movement schedule of a plurality of mobile bodies capable of mutual short-range wireless communication, and a first mobile body among the plurality of mobile bodies When it is detected that the status information indicating the current status of cannot be received, the second mobile body scheduled to move to the first area where the first mobile body is staying is searched based on the schedule information. and transmits the distribution data to the first mobile unit to the second mobile unit.
- FIG. 10 is a sequence diagram showing an example of processing of the data distribution system when registering public key data of a first mobile unit and a second mobile unit in a server device;
- FIG. 10 is a sequence diagram showing an example of processing of the data distribution system when the user uses the first mobile unit that is in a state of being able to communicate with the server device;
- FIG. 10 is a sequence diagram showing an example of processing of the data distribution system when transmitting data to be distributed to a second mobile unit outside the communication range to the first mobile unit by proxy;
- FIG. 10 is a sequence diagram showing an example of processing of the data distribution system when a first mobile transfers data to be distributed to a second mobile to the second mobile;
- FIG. 10 is a sequence diagram showing an example of processing of the data distribution system when registering public key data of a first mobile unit and a second mobile unit in a server device;
- FIG. 10 is a sequence diagram showing an example of processing of the data distribution system when the user uses the first mobile unit that is in a state of being able
- FIG. 10 is a sequence diagram showing an example of processing of the data delivery system when the first mobile unit transfers information indicating completion of reception of delivery data to the server device; It is a figure which shows the movement schedule of each of three mobile bodies.
- FIG. 11 is a sequence diagram showing another example of processing of the data distribution system when transmitting data to be distributed to a second mobile unit outside the communication range to the first mobile unit by proxy;
- FIG. 11 is a sequence diagram showing another example of processing of the data distribution system when the first mobile transfers the data to be distributed to the second mobile to the second mobile;
- Patent Literature 1 proposes a method of transmitting vehicle information of other vehicles outside the communication range of the server to the server.
- this method there is a problem that distribution data containing information unique to the other vehicle cannot be distributed to other vehicles outside the communication range.
- the present inventors diligently studied a technique for distributing distribution data to a mobile body that cannot perform wireless communication, and came up with the following aspects of the present disclosure. .
- a computer acquires schedule information indicating a movement schedule of a plurality of mobile bodies capable of mutual short-range wireless communication, and a first mobile body among the plurality of mobile bodies When it is detected that the status information indicating the current status of cannot be received, the second mobile body scheduled to move to the first area where the first mobile body is staying is searched based on the schedule information. and transmits the distribution data to the first mobile unit to the second mobile unit.
- the destination of the distribution data to the first mobile unit that cannot receive the status information it is scheduled to move to the first area where the first mobile unit is staying. is retrieved. Then, the distribution data is transmitted to the second mobile body. Therefore, when the second mobile body moves to the first area, the data to be delivered to the first mobile body can be delivered to the first mobile body by short-range wireless communication.
- the schedule information may include information indicating an area and date and time that the plurality of mobile bodies are scheduled to depart, and information indicating an area and date and time that the plurality of mobile bodies are scheduled to arrive. .
- the schedule information by referring to the schedule information, it is possible to grasp the area where the first moving object arrived at the most recent past date and time as the first area where the first moving object is staying. can. Also, with reference to the schedule information, after the date and time when the first mobile body arrived at the first area and before the most recent scheduled departure date and time of the first mobile body A mobile body scheduled to arrive at the first area can be appropriately retrieved as a second mobile body scheduled to move to the first area.
- the distribution data is data that brings the first mobile object into the latest state
- the state information most recently received from the first mobile object is the The distribution data may be transmitted to the second mobile when it is detected that the first mobile does not show the latest state.
- the distribution data that makes the first mobile unit in the latest state is transmitted to the first mobile unit via the second mobile unit. can do.
- information requesting transfer of the distribution data to the first mobile may be further transmitted to the second mobile.
- the second mobile body it is possible to cause the second mobile body to transfer the distribution data to the first mobile body to the first mobile body without human intervention. Further, even if the first mobile body is in a state of communication difficulty for a predetermined time or longer, the second mobile body receives information indicating completion of reception of the distribution data from the first mobile body and transfers it to the computer. be able to. Therefore, even when communication with the first mobile unit is difficult, the computer can recognize that the distribution data has been delivered to the first mobile unit.
- the schedule information includes: Based on this, a mobile body that first moves from the first area to a second area different from the first area among the two or more mobile bodies may be retrieved as the second mobile body.
- the A moving object that leaves the first area early is searched as a second moving object.
- the second mobile when the second mobile receives information indicating completion of reception of the distribution data from the first mobile after transmitting the distribution data to the first mobile, Information indicating completion of reception can be sent to the computer as soon as possible. In this case, the computer can quickly grasp that the first mobile unit has received the distribution data.
- the distribution data is divided into a plurality of pieces of data equal to or less than the total number of the second mobile bodies, and the mobile bodies equal to or less than the total number included in the second mobile body , the plurality of data may be transmitted without duplication.
- the distribution data is divided into a plurality of data equal to or less than the total number of mobile bodies included in the second mobile body, and the plurality of data are duplicated for the mobile bodies equal to or less than the total number included in the second mobile body. Not to be sent.
- the mobile bodies equal to or less than the total number can transmit each of the plurality of data to the first mobile body by short-range wireless communication.
- the first moving object can acquire the distribution data by combining the plurality of data received from the moving objects equal to or less than the total number.
- a server device includes an acquisition unit that acquires schedule information indicating movement schedules of a plurality of mobile bodies capable of mutual near field communication, and a first mobile body among the plurality of mobile bodies: a second mobile body that is scheduled to move to the first area where the first mobile body is staying based on the schedule information when it detects that it cannot receive status information indicating its current status from and a transmission unit configured to transmit the distribution data to the first mobile unit to the second mobile unit.
- a program comprises: an acquisition unit configured to acquire schedule information indicating movement schedules of a plurality of mobile bodies capable of mutual near field communication; When it is detected that the status information indicating its current status cannot be received from the mobile body, the second mobile body scheduled to move to the first area where the first mobile body is staying is based on the schedule information. It functions as a processing unit that searches for a mobile unit and a transmission unit that transmits distribution data to the first mobile unit to the second mobile unit.
- such a computer program can be distributed via a computer-readable non-transitory recording medium such as a CD-ROM or a communication network such as the Internet.
- a data distribution system is a data distribution system for transmitting data from a server device to a plurality of mobile units, wherein each of the plurality of mobile units is in a state indicating its own current state.
- a state notification unit that transmits information to the server device; and a short-range wireless communication unit that performs short-range wireless communication with other mobile units.
- a processing unit that searches for a second mobile that is scheduled to move to a first area that is located in the mobile station; and a transmission unit that transmits distribution data to the first mobile to the second mobile.
- the server device when the server device cannot receive the state information from the first mobile unit, the first mobile unit is the destination of the distribution data to the first mobile unit based on the schedule information. A search is made for a second mobile body that is scheduled to move to the first area where the Then, the distribution data is transmitted to the second mobile unit. Therefore, when the second mobile body moves to the first area, the data to be delivered to the first mobile body can be delivered to the first mobile body by the short-range wireless communication unit.
- FIG. 1 is a diagram showing an example of the overall configuration of a data delivery system 100.
- the data distribution system 100 according to the embodiment of the present disclosure provides a plurality of mobile bodies 2 capable of mutual short-range wireless communication such as Bluetooth (registered trademark) and a sharing service for sharing the plurality of mobile bodies 2. It originally comprises a server device 1 for providing the service, a user terminal 3 used by a sharing service user, and an administrator terminal 4 used by an administrator of the sharing service.
- a server device 1 for providing the service
- a user terminal 3 used by a sharing service user
- an administrator terminal 4 used by an administrator of the sharing service.
- the mobile unit 2, the user terminal 3, and the administrator terminal 4 are communicably connected to the server device 1 via the network 9.
- the network 9 is composed of, for example, a WAN (Wide Area Network) including the Internet, a mobile phone communication network, and the like.
- the moving object 2 for example, vehicles such as automobiles, motorcycles, motorized bicycles, and electric bicycles that can be moved by the user's driving are adopted.
- a network 9 such as a smart phone, a tablet terminal and a personal computer is adopted.
- the server device 1 employs a cloud server comprising one or more computers equipped with a processor such as a CPU (Central Processing Unit), memory, and a communication circuit for communicating with external devices via the network 9 .
- a processor such as a CPU (Central Processing Unit), memory
- a communication circuit for communicating with external devices via the network 9 .
- the data distribution system 100 distributes distribution data to each mobile object 2 generated based on information and data acquired by the server device 1 from the user terminal 3 and the administrator terminal 4 via the network 9 from the server device 1 to the network 9 . distributed to each moving body 2 via. In addition, the data distribution system 100 distributes the distribution data to the mobile unit 2 that is unable to communicate wirelessly with the server device 1 to the mobile unit 2 that is unable to communicate wirelessly via another proxy mobile unit 2 . deliver to
- the mobile unit 2 includes a memory 20, a wireless communication circuit 21, a short-range wireless communication circuit 22 and a processor 23.
- the moving body 2 further includes a battery for driving the moving body 2, a GPS (Global Positioning System) sensor for detecting the current position, and an operating device for allowing the user to perform various operations to use the moving body 2. and a display for displaying various information.
- GPS Global Positioning System
- the memory 20 is composed of a non-volatile rewritable semiconductor memory such as a flash memory.
- the memory 20 stores programs such as firmware executed by the processor 23 and data of the private key and public key of the mobile unit 2 .
- the memory 20 also stores schedule information indicating the movement schedule of the moving body 2 .
- the schedule information includes information indicating the date and time when the schedule information was generated (hereinafter, generation date and time information), identification information of the mobile unit 2, information on the user using the mobile unit 2 (hereinafter, user information). is included.
- the schedule information includes information indicating the scheduled departure area and date and time of the mobile body 2 and information indicating the scheduled arrival area and date and time of the mobile body 2 .
- An area is a service providing base of the sharing service. In the area, a predetermined number of mobile units 2 that can be shared by the sharing service are provided and returned.
- the user information includes user identification information, information indicating the user's name and contact information, an authentication code for unlocking the moving body 2 used by the user, and the like.
- the wireless communication circuit 21 performs wireless communication with the server device 1 via the network 9.
- the short-range wireless communication circuit 22 performs short-range wireless communication with another mobile object 2 .
- the processor 23 is composed of a CPU (Central Process Sing Unit).
- the processor 23 includes a transmission section 231 (status notification section, short-range wireless communication section), a processing section 232 and an acquisition section 233 . These blocks may consist of dedicated hardware circuits.
- the transmission unit 231 uses the wireless communication circuit 21 to transmit various types of information and data to the server device 1 . Specifically, the transmission unit 231 transmits the public key data stored in the memory 20 to the server device 1 . In addition, the transmitting unit 231 periodically (for example, every 30 seconds) transmits state information indicating the current state of the mobile unit 2 to the server device 1 .
- the state information includes information indicating the current date and time (hereinafter referred to as current date and time information), identification information of the mobile object 2, information indicating the type of the mobile object 2, and information indicating the current position of the mobile object 2.
- the information indicating the type of the mobile object 2 includes information indicating whether the mobile object 2 is an automobile, motorcycle, motorized bicycle, or electric bicycle, and information indicating the model number of the mobile object 2.
- the status information further includes information indicating the date and time when the schedule information was stored in the memory 20 (hereinafter, schedule update date and time information) and information indicating the version of the firmware stored in the memory 20 (hereinafter, version information).
- the transmission unit 231 uses the short-range wireless communication circuit 22 to transmit various types of information and data to another moving object 2 within a predetermined distance. Specifically, the transmission unit 231 transmits the distribution data to the other mobile unit 2 acquired by the acquisition unit 233 to the other mobile unit 2 using the short-range wireless communication circuit 22 .
- the processing unit 232 performs predetermined processing using various information and data acquired by the acquisition unit 233 and various information and data stored in the memory 20 . For example, when the acquisition unit 233 acquires distribution data to itself, the processing unit 232 decrypts the distribution data using the private key data stored in the memory 20 . The processing unit 232 stores schedule information and/or firmware included in the decrypted distribution data in the memory 20 .
- the acquisition unit 233 acquires various types of information and data received by the wireless communication circuit 21 from the server device 1 . Specifically, the acquisition unit 233 acquires the distribution data to the mobile unit 2 itself or another mobile unit 2 received by the wireless communication circuit 21 from the server device 1 .
- the acquisition unit 233 acquires various types of information and data received by the short-range wireless communication circuit 22 from another mobile object 2 . Specifically, the acquisition unit 233 acquires the distribution data received by the short-range wireless communication circuit 22 from the other mobile unit 2 .
- the server device 1 includes a memory 10, a communication circuit 11 and a processor 13.
- the memory 10 is composed of, for example, a non-volatile rewritable semiconductor memory such as a flash memory or a HDD (Hard Disk Drive).
- the memory 10 stores programs executed by the processor 13 .
- the memory 10 also includes a schedule information storage unit 111 , a status information storage unit 112 , a public key storage unit 113 and a firmware storage unit 114 .
- the schedule information storage unit 111 stores schedule information indicating movement schedules of a plurality of mobile bodies 2 .
- the state information storage unit 112 stores information about a plurality of moving bodies 2 (hereinafter referred to as moving body information) and state information indicating states of the plurality of moving bodies 2 .
- the mobile information includes identification information of the mobile 2, communication destination information of the mobile 2, model number of the mobile 2, information indicating the moving speed of the mobile 2, and the like.
- the public key storage unit 113 stores public key data of a plurality of mobile units 2 .
- the firmware storage unit 114 stores firmware that can be used by a plurality of moving bodies 2 and information about the firmware (hereinafter referred to as firmware information).
- the firmware information includes information indicating the version of the firmware (hereinafter referred to as version information), information indicating the type of mobile object 2 that can use the firmware, and the like.
- the communication circuit 11 communicates with the user terminal 3, the administrator terminal 4, and a plurality of mobile units 2 via the network 9.
- the processor 13 is composed of a CPU (Central Processing Unit).
- the processor 13 operates as an acquisition unit 133 , a processing unit 132 and a transmission unit 131 by executing programs stored in the memory 10 .
- the acquisition unit 133 acquires various types of information and data received by the communication circuit 11 from multiple mobile units 2, user terminals 3, and administrator terminals 4.
- the acquisition unit 133 acquires the public key data of each mobile object 2 received by the communication circuit 11 from each mobile object 2 .
- the acquisition unit 133 acquires state information indicating the current state of each mobile unit 2 received from each mobile unit 2 by the communication circuit 11 .
- the acquisition unit 133 acquires service usage information received by the communication circuit 11 from the user terminal 3 .
- the service usage information is information indicating usage details of the mobile unit 2 by the user.
- the service usage information includes information indicating the date and time when the user entered the service usage information, user information, identification information of the moving body 2 used by the user, information indicating the area and date and time when the use of the moving body 2 is started ( hereinafter referred to as rental information) and information indicating the area and date and time for returning the mobile body 2 (hereinafter referred to as return information).
- the acquisition unit 133 acquires mobile information received from the administrator terminal 4 by the communication circuit 11 .
- the acquisition unit 133 acquires the firmware and firmware information received by the communication circuit 11 from the administrator terminal 4 .
- the processing unit 132 performs predetermined processing using various information and data acquired by the acquisition unit 133 and various information and data stored in the memory 10 .
- the processing unit 132 generates schedule information for each mobile unit 2 based on the service usage information acquired by the acquisition unit 133, and stores the generated schedule information for each mobile unit 2 in the schedule information storage unit 111. do.
- the processing unit 132 generates generation date and time information included in the schedule information based on information indicating the date and time when the user entered the service usage information, which is included in the service usage information.
- the processing unit 132 generates the identification information and user information of the mobile unit 2 included in the schedule information based on the identification information and user information of the mobile unit 2 included in the service usage information.
- the processing unit 132 generates information indicating the scheduled departure area and date and time of the moving body 2 included in the schedule information, based on the rental information included in the service usage information.
- the processing unit 132 generates information indicating the scheduled area and date and time of return of the moving body 2 included in the schedule information, based on the return information included in the service usage information.
- the processing unit 132 stores the mobile body information regarding each mobile body 2 acquired by the acquisition unit 133 in the state information storage unit 112 . As a result, each mobile unit 2 is registered as a target mobile unit 2 to be shared in the sharing service.
- the processing unit 132 stores the state information in the state information storage unit 112 each time the obtaining unit 133 obtains the state information of each moving body 2 . Thereby, the processing unit 132 updates the state information indicating the current state of each moving object 2 with the state information of each moving object 2 stored most recently in the state information storage unit 112 .
- the processing unit 132 stores the public key data of each mobile object 2 acquired by the acquiring unit 133 in the public key storage unit 113 .
- the processing unit 132 associates the firmware and the firmware information acquired by the acquisition unit 133 and stores them in the firmware storage unit 114 .
- the processing unit 132 Based on the state information indicating the current state of each mobile unit 2 stored in the state information storage unit 112 and the schedule information of each mobile unit 2 stored in the schedule information storage unit 111, the processing unit 132 It is determined whether or not the moving body 2 is in the latest state. That each mobile unit 2 is in the latest state indicates that each mobile unit 2 has completed receiving distribution data that brings each mobile unit 2 into the latest state. When the processing unit 132 determines that each moving body 2 is not in the latest state, the processing unit 132 acquires distribution data for bringing each moving body 2 into the latest state. The distribution data includes the latest version of firmware to be distributed to each mobile unit 2 and schedule information indicating the movement schedule of each mobile unit 2 .
- the processing unit 132 refers to the state information of each moving object 2 most recently stored in the state information storage unit 112 as the state information indicating the current state of each moving object 2 . It is assumed that the firmware storage unit 114 stores firmware information including information indicating the type of each moving body 2 included in the state information and version information indicating a newer version than the version information included in the state information. In this case, the processing unit 132 determines that each moving body 2 is not in the latest state. Then, the processing unit 132 acquires the firmware associated with the firmware information from the firmware storage unit 114 as distribution data for updating each moving body 2 to the latest state.
- the processing unit 132 selects generated date/time information indicating a date and time newer than the schedule update date/time information included in the status information referred to above among the schedule information of each mobile unit 2 stored in the schedule information storage unit 111. If there is schedule information to include, it is determined that each mobile unit 2 is not in the latest state. In this case, the processing unit 132 acquires, from the schedule information storage unit 111, schedule information including generation date/time information indicating the new date/time as distribution data for bringing each moving body 2 into the latest state.
- the processing unit 132 encrypts the acquired distribution data to each mobile object 2 using the public key data of each mobile object 2 stored in the public key storage unit 113 .
- the processing unit 132 When the processing unit 132 detects a mobile object 2 that is in a state where communication with the server device 1 is difficult, the processing unit 132 determines whether the mobile object 2 is moving based on the schedule information of a plurality of mobile objects 2 stored in the schedule information storage unit 111 . A search is made for a proxy mobile unit 2 that can transfer data to be delivered to the mobile unit 2 to the mobile unit 2 .
- the transmission unit 131 uses the communication circuit 11 to transmit various types of information and data to multiple mobile units 2 . Specifically, the transmission unit 131 transmits the distribution data to each moving object 2 encrypted by the processing unit 132 to each moving object 2 . Further, when the processing unit 132 finds the proxy mobile unit 2 , the transmission unit 131 transmits the distribution data encrypted by the processing unit 132 to the proxy mobile unit 2 .
- FIG. 1 the processing of the data distribution system 100 will be explained using FIGS. 2 to 7.
- FIG. 2 the processing of the data distribution system 100 will be explained using FIGS. 2 to 7.
- FIG. 2 is a sequence diagram showing an example of processing of the data distribution system 100 when registering the public key data of the first mobile unit 2a and the second mobile unit 2b in the server device 1. As shown in FIG.
- the public key data is transmitted to the server device 1 (step S211).
- the processing unit 132 stores the data of the public key of the first moving body 2a acquired by the acquiring unit 133 in the public key storage unit 113 (step S111). As a result, the public key of the first mobile unit 2a is registered in the server device 1.
- FIG. 1 the processing unit 132 stores the data of the public key of the first moving body 2a acquired by the acquiring unit 133 in the public key storage unit 113 (step S111). As a result, the public key of the first mobile unit 2a is registered in the server device 1.
- the public key data of the second mobile unit 2b is registered in the server device 1.
- the data to be distributed to each of the first mobile unit 2a and the second mobile unit 2b is encrypted using the public key data of the first mobile unit 2a and the second mobile unit 2b, and transmitted. It becomes possible to
- FIG. 3 is a sequence diagram showing an example of processing of the data distribution system 100 when the user uses the first mobile unit 2a that is in a state of being able to communicate with the server device 1. As shown in FIG.
- the transmitting unit 231 of the first moving body 2a periodically transmits state information indicating the current state of the first moving body 2a to the server device 1 (step S221).
- the processing unit 132 stores the state information in the state information storage unit 112 each time the obtaining unit 133 obtains the state information of the first moving body 2a.
- the state information indicating the current state of the first moving body 2a is updated to the most recently stored state information of the first moving body 2a in the state information storage unit 112 (step S121).
- the user terminal 3 when the user terminal 3 receives the user's input operation of the service usage information for using the first mobile unit 2a, the user terminal 3 transmits the service usage information to the server device 1 (step S321).
- the processing unit 132 generates schedule information for the first mobile unit 2a using the service usage information for using the first mobile unit 2a acquired by the acquisition unit 133, and schedules the generated schedule information. Stored in the information storage unit 111 . Thereby, the schedule information of the first moving body 2a is updated (step S122).
- the administrator terminal 4 accepts an input operation by the administrator of the firmware of the latest version that can be used by the mobile unit 2 of the same type as the first mobile unit 2a and firmware information related to the firmware, the firmware and the firmware The information is transmitted to the server device 1 (step S421).
- the processing unit 132 associates the latest version of the firmware acquired by the acquisition unit 133 with the firmware information related to the firmware and stores them in the firmware storage unit 114 (step S123).
- the transmission unit 231 of the first mobile unit 2a periodically sends state information indicating the current state of the first mobile unit 2a to the server device 1. It transmits (step S221).
- the processing unit 132 stores the state information acquired by the acquisition unit 133 in the state information storage unit 112 . Thereby, the state information indicating the current state of the first moving body 2a is updated (step S121).
- the processing unit 132 stores the state information indicating the current state of the first moving unit 2a stored in the state information storage unit 112 and the schedule information of the first moving unit 2a stored in the schedule information storage unit 111. , it is determined whether or not the first moving body 2a is in the latest state (step S124).
- the processing unit 132 determines that the first moving body 2a is not in the latest state, it acquires distribution data to the first moving body 2a (step S125).
- the transmission unit 131 transmits information requesting download of the distribution data to the first mobile unit 2a (step S126).
- the transmission unit 231 transmits the information requesting the transmission of the distribution data to the server device 1 (step S222).
- the processing unit 132 stores the distribution data as the public key data of the first mobile unit 2a stored in the public key storage unit 113. Encrypt with The transmission unit 131 transmits the encrypted distribution data to the first mobile unit 2a to the first mobile unit 2a (step S127).
- the processing unit 232 uses the private key data of the first mobile unit 2a stored in the memory 20 to decrypt the distribution data. (Step S223).
- the processing unit 232 reflects the decrypted distribution data in the memory 20 (step S224).
- step S224 if the decoded distribution data contains the schedule information of the first mobile unit 2a, the processing unit 232 extracts the schedule information stored in the memory 20 according to the schedule information. to update.
- the transmission unit 231 updates the schedule update date/time information included in the status information to be sent to the server device 1 to information indicating the date/time when the schedule information was updated in step S224.
- step S224 if the decrypted distribution data contains firmware, the processing unit 232 updates the firmware stored in the memory 20 with the firmware.
- the transmission unit 231 updates the version information included in the state information to be transmitted to the server device 1 to information indicating the version of the firmware.
- FIG. 4 is a sequence diagram showing an example of processing of the data distribution system 100 when the data to be distributed to the second mobile unit 2b outside the communication range is transmitted to the first mobile unit 2a by proxy.
- the transmitting unit 231 of the first moving body 2a periodically transmits state information indicating the current state of the first moving body 2a to the server device 1 (step S221).
- the processing unit 132 stores the state information of the first moving body 2 a acquired by the acquiring unit 133 in the state information storage unit 112 . Thereby, the state information indicating the current state of the first moving body 2a is updated (step S121).
- the acquisition unit 133 is in a state where it cannot acquire the state information transmitted by the transmission unit 231 of the second moving body 2b. Therefore, the state information indicating the current state of the second moving body 2b is no longer updated.
- the processing unit 132 periodically refers to the state information of multiple moving bodies 2 stored in the state information storage unit 112 . If there is state information indicating that the current date and time is earlier than the current date and time by a predetermined period or more, the processing unit 132 determines that the mobile unit 2 corresponding to the state information is in a state where communication with the server device 1 is difficult. , it detects that the status information cannot be received from the mobile unit 2 (first mobile unit) (step S131). In this example, in step S131, it is detected that the state information cannot be received from the second moving body 2b.
- the processing unit 132 When the processing unit 132 detects that the state information cannot be received from the second moving body 2b, the processing unit 132 retrieves the state information indicating the current state of the second moving body 2b stored in the state information storage unit 112 and the schedule information storage unit 111. Based on the schedule information of the second moving body 2b stored in the second moving body 2b, it is determined whether or not the second moving body 2b is in the latest state (step S132).
- the processing unit 132 determines that the second moving body 2b is not in the latest state, it acquires distribution data to the second moving body 2b (step S133). Next, the processing unit 132 can transfer the distribution data to the second mobile unit 2b to the second mobile unit 2b based on the schedule information of the plurality of mobile units 2 stored in the schedule information storage unit 111. A mobile unit 2 that can act as a proxy is retrieved (step S134).
- step S134 the processing unit 132, based on the schedule information of the plurality of mobile units 2 stored in the schedule information storage unit 111, determines the area where the second mobile unit 2b is currently staying (the A mobile unit 2 scheduled to move to another area) is retrieved as a proxy mobile unit 2 (second mobile unit).
- the processing unit 132 refers to the schedule information of the second moving body 2b stored in the schedule information storage unit 111, and selects the area where the second moving body 2b arrived at the most recent past date and time as the second It is grasped as the area where the moving object 2b is currently staying (hereinafter referred to as non-communicable area).
- the processing unit 132 determines that communication is impossible after the date and time when the second mobile body 2b arrives in the communication impossible area and before the most recent scheduled departure date and time of the second mobile body 2b.
- a moving body 2 corresponding to schedule information including information indicating a scheduled arrival date and time in an area is grasped as a moving body 2 scheduled to move to a communication impossible area.
- the mobile object 2 corresponding to the schedule information is the mobile object 2 identified by the identification information of the mobile object 2 included in the schedule information.
- the processing unit 132 selects the mobile unit 2 corresponding to the schedule information including the information indicating the date and time when the second mobile unit 2b is scheduled to arrive in the communication unavailable area after the date and time when the second mobile unit 2b arrives in the communication unavailable area. It is grasped as a mobile body 2 scheduled to move to a communication impossible area.
- the processing unit 132 searches for a moving body 2 randomly selected from the plurality of moving bodies 2 as a substitute moving body 2 .
- the processing unit 132 may determine the substitute moving body 2 from among the plurality of moving bodies 2 by a method to be described later. In this example, it is assumed that the first moving body 2a is retrieved as the substitute moving body 2 in step S134.
- step S134 in the server apparatus 1, when the acquiring unit 133 acquires the state information of the first moving body 2a, the processing unit 132 updates the state information indicating the current state of the first moving body 2a (step S121 ). Next, the processing unit 132 determines whether or not the data to be distributed to the second moving body 2b can be distributed to the first moving body 2a as a proxy (step S135).
- step S135 the processing unit 132 obtains the information indicating the type of the first moving body 2a and the current status of the first moving body 2a, which are included in the state information of the first moving body 2a acquired by the acquiring unit 133. Refer to the information indicating the location.
- the processing unit 132 also refers to the moving speed of the first moving body 2a included in the moving body information of the first moving body 2a stored in the state information storage unit 112 .
- the processing unit 132 calculates the time required for the moving body 2 of the referred type to move from the referred current position to the non-communicable area grasped in step S134 (hereinafter referred to as travel time) at the referred moving speed.
- the processing unit 132 transmits the encrypted distribution data to the first moving body 2a at a predetermined encryption speed and the time required to encrypt the distribution data acquired in step S133 and at a predetermined communication speed. Then, the total time required for the first moving body 2a to complete reception is calculated.
- the processing unit 132 determines that the distribution data to the second mobile unit 2b can be distributed to the first mobile unit 2a by proxy.
- step S135 When the processing unit 132 determines in step S135 that the data to be distributed to the second mobile unit 2b cannot be distributed to the first mobile unit 2a by proxy, it performs step S134. As a result, it is possible to re-search for the proxy moving body 2 .
- step S135 when it is determined that the data to be distributed to the second mobile body 2b can be distributed to the first mobile body 2a as a proxy, the transmission unit 131 sends the second mobile body 2b to the first mobile body 2a. (hereinafter referred to as proxy download request information) requesting the transfer of the distribution data to the second mobile unit 2b (step S136).
- proxy download request information requesting the transfer of the distribution data to the second mobile unit 2b (step S136).
- the transmission unit 231 of the first mobile unit 2a transmits to the server device 1 information requesting transmission of distribution data to the second mobile unit 2b. (step S231).
- the processing unit 132 publicizes the second mobile unit 2b stored in the public key storage unit 113. Using the key data, the data to be delivered to the second moving body 2b acquired in step S133 is encrypted (step S137).
- the transmission unit 131 transmits the distribution data for the second moving body 2b encrypted in step S137 to the first moving body 2a (step S138). Thereby, the acquisition unit 233 of the first mobile unit 2a acquires the distribution data to the second mobile unit 2b. Thereafter, processing similar to that shown in FIG. 3 is performed.
- FIG. 5 is a sequence diagram showing an example of processing of the data distribution system when the first mobile unit 2a transfers the distribution data for the second mobile unit 2b to the second mobile unit 2b.
- the transmitter 231 of the first mobile unit 2a uses the short-range wireless communication circuit 22 to detect whether short-range communication with the second mobile unit 2b is possible (step S241).
- the transmission unit 231 of the first mobile unit 2a detects that short-range communication with the second mobile unit 2b is possible, it transfers the distribution data to the second mobile unit 2b to the second mobile unit 2b (step S242). .
- the processing unit 232 uses the secret key data of the second mobile body 2b stored in the memory 20 to The distribution data is decrypted (step S243). Then, similarly to step S224 (FIG. 3), the processing unit 232 reflects the decrypted distribution data in the memory 20 of the second moving body 2b (step S244).
- the processing unit 232 confirms whether or not the second moving body 2b is scheduled to move immediately based on the schedule information of the second moving body 2b stored in the memory of the second moving body 2b. (Step S245).
- step S245 if there is schedule information indicating that the scheduled departure date and time from the area where the current stay is after the current date and time, the processing unit 232 changes the scheduled departure date from the current date and time. is grasped as the remaining period of stay in the area where the user is currently staying. If the remaining period of stay is equal to or longer than a predetermined reference period of stay (predetermined time), the processing unit 232 determines that the second moving body 2b does not have a move schedule in the near future. In addition, when there is no schedule information indicating a schedule to depart from the area where the processor 232 is currently staying, the processing unit 232 determines that the second moving body 2b has no immediate movement schedule.
- reception completion information includes a message indicating completion of reception of the distribution data, and state information indicating the state of the second mobile unit 2b after the distribution data has been reflected.
- the processing unit 232 generates reception completion information with an electronic signature by encrypting the generated reception completion information with data of the secret key of the second moving body 2b stored in the memory 20 (step S246).
- step S245 If the processing unit 232 determines in step S245 that the second moving body 2b is scheduled to move in the near future, it does not perform step S246. However, the second moving body 2b is scheduled to move to another area before the reference period of stay elapses. Therefore, when the second mobile unit 2b becomes capable of wireless communication with the server device 1, the transmission unit 231 of the second mobile unit 2b indicates the state of the second mobile unit 2b after the distribution data is reflected. State information can be sent to the server device 1 .
- the transmission unit 231 uses the short-range wireless communication circuit 22 to request that the reception completion information and the reception completion information be transferred to the server device 1 as a proxy.
- Information (hereinafter referred to as proxy notification request information) is transmitted to the first mobile unit 2a (step S247).
- the acquisition unit 233 of the first mobile unit 2a acquires the reception completion information and proxy notification request information from the second mobile unit 2b.
- FIG. 6 is a sequence diagram showing an example of processing of the data distribution system when the first mobile unit 2a transfers information indicating completion of reception of distribution data to the server apparatus 1. As shown in FIG.
- the transmitting unit 231 of the first moving body 2a uses the wireless communication circuit 21 to detect whether wireless communication with the server device 1 is possible (step S251).
- the transmission unit 231 Upon detecting that wireless communication with the server device 1 is possible, the transmission unit 231 transmits the reception completion information with the electronic signature acquired by the acquisition unit 233 to the server device 1 (step S252).
- step S151 the processing unit 132 decrypts the reception completion information received from the first mobile unit 2a using the public key data of the second mobile unit 2b stored in the public key storage unit 113. If so, it is determined that the electronic signature attached to the reception completion information is the electronic signature by the second mobile unit 2b.
- step S152 When the processing unit 132 confirms that the electronic signature attached to the reception completion information is the electronic signature by the second mobile unit 2b, the processing unit 132 updates the state information indicating the current state of the second mobile unit 2b (step S152). ). Specifically, in step S ⁇ b>152 , processing unit 132 stores the state information included in the reception completion information decoded in step S ⁇ b>151 in state information storage unit 112 . As a result, the state information indicating the current state of the second moving body 2b is updated to the most recently stored state information of the second moving body 2b in the state information storage unit 112 .
- step S134 (Method of Determining Deputy Moving Object 2)
- a method of determining a substitute moving body 2 from among the plurality of moving bodies 2 will be described with reference to FIG. will be used to explain.
- two mobile bodies 2, namely the first mobile body 2a and the third mobile body exist as the mobile bodies 2 scheduled to move in the non-communicable area where the second mobile body 2b is currently staying. will be described as an example.
- FIG. 7 is a diagram showing the movement schedule of each of the three moving bodies 2: the first moving body 2a, the second moving body 2b, and the third moving body.
- the horizontal axis indicates date and time.
- Graph T1 shows that the first mobile unit 2a departs from the area A1 in which communication with the server device 1 is possible at date and time t1, and communication with the server device 1 in which the second mobile unit 2b is staying is impossible. This indicates that the vehicle is scheduled to arrive at a specific area A2 at date and time t3.
- Graph T1 also indicates that the first moving body 2a is scheduled to leave area A2 at date t6 and arrive at area A1 at date t7.
- Graph T3 indicates that the third moving body is scheduled to leave area A1 at date and time t2 and arrive at area A2 at date and time t4.
- Graph T3 also indicates that the third moving body is scheduled to leave area A2 at time t5 and arrive at area A2 at time t6.
- the graph T2 indicates that the second moving body 2b is scheduled to arrive at the area A2 at a date and time before the date and time t1. Graph T2 also indicates that there is no plan to leave area A2 at time t7 or later.
- the processing unit 132 determines the communication speed (hereinafter referred to as the first communication speed) between the short-range wireless communication circuit 22 of the first mobile unit 2a and the short-range wireless communication circuit 22 of the second mobile unit 2b, Calculate the required time required for the first mobile body 2a to complete the transfer of the delivery data to the second mobile body 2b (hereinafter referred to as the first required time) based on the amount of data to be delivered to the second mobile body 2b. do.
- the first communication speed hereinafter referred to as the first communication speed
- the first required time the required time required for the first mobile body 2a to complete the transfer of the delivery data to the second mobile body 2b
- the processing unit 132 calculates the result of dividing the data amount of the data to be distributed to the second mobile unit 2b by the first communication speed as the first required time. Then, if the stay time of the first moving body 2a from the date and time t3 to the date and time t6 during which the first moving body 2a stays in the area A2 (hereinafter referred to as the first staying time) is longer than the first required time, the first moving body 2a is determined as the proxy moving body 2;
- the processing unit 132 calculates the time required for the third mobile unit to complete the transfer of the distribution data to the second mobile unit 2b (hereinafter referred to as the third required time). Then, if the stay time of the third moving body from date and time t4 to date and time t5 during which the third moving body stays in area A2 (hereinafter referred to as third staying time) is longer than the third required time, the processing unit 132 selects the third moving body as It is determined as the moving body 2 as a proxy.
- the processing unit 132 determines, based on the schedule information of the plurality of mobile units 2, that the staying time in the area A2 is longer than the time required to complete the transfer of the distribution data to the second mobile unit 2b. The above moving body 2 is detected. In this case, the processing unit 132 determines the moving body 2 that first moves from the area A2 to the area A1 different from the area A2 as the proxy moving body 2 among the two or more moving bodies 2 .
- the processing unit 132 selects the third moving body that first moves from the area A2 to the area A1 different from the area A2 as the proxy moving body 2, out of the first moving body 2a and the third moving body. decide.
- the first stay time may be shorter than the first required time
- the third stay time may be shorter than the third required time.
- the processing unit 132 determines that the stay time in the area A2 is two times shorter than the time required to complete the transfer of the distribution data to the second mobile unit 2b. The above moving body 2 is detected.
- the processing unit 132 may determine both of the two or more mobile bodies 2 as proxy mobile bodies 2 .
- step S137 the processing unit 132 divides the distribution data to the second mobile unit 2b into a plurality of pieces of data equal to or less than the total number of the two or more proxy mobile units 2, Each piece of data should be encrypted.
- the transmitting unit 131 may transmit the plurality of pieces of encrypted data to the moving bodies 2 included in the two or more proxy moving bodies 2 and not more than the total number so as not to overlap.
- step S152 in step S152 (FIG. 6), in step S151 (FIG. 6), all the electronic signatures attached to the reception completion information received from each of the two or more proxy mobile bodies 2 are the second mobile body 2b, the status information indicating the current status of the second moving body 2b may be updated.
- step S245 when the processing unit 232 of the second moving body 2b determines that there is no immediate movement schedule of the second moving body 2b, step S247 (FIG. 5) ), an example of transmitting the proxy notification request information to the first mobile unit 2a together with the reception completion information has been described.
- step S135 in the server apparatus 1 when it is determined that the data to be distributed to the second mobile unit 2b can be distributed to the first mobile unit 2a by proxy, the processing unit 132 may confirm whether or not there is an immediate movement schedule of the second moving body 2b (step S141), in the same manner as in step S245 (FIG. 5).
- the transmission unit 131 sends proxy download request information and proxy notification request information (distribution data delivery data) to the first mobile unit 2a.
- Information requesting that information indicating the completion of reception be received from the first mobile unit and transferred to the computer) is transmitted (step S136a).
- the transmission unit 131 transmits proxy download request information to the first mobile unit 2a (step S136).
- the transmission unit 231 confirms that short-range communication with the second mobile unit 2b is possible.
- the distribution data to the second moving body 2b is transferred to the second moving body 2b (step S242).
- the transmission unit 231 of the first mobile unit 2a detects that short-range communication is possible with the second mobile unit 2b. (Step S241), together with the distribution data to the second mobile unit 2b, information requesting transmission of reception completion information is transmitted to the second mobile unit 2b (step S242a).
- steps S246 and S247 are not performed.
- the first moving body 2a does not perform step S252 shown in FIG. 6 after leaving the area where the second moving body 2b is currently staying toward another area.
- the server apparatus 1 does not perform steps S151 and S152.
- steps S246 and S247 are performed after step S244.
- step S134 (FIGS. 4 and 8) in the above-described embodiment and modified example (1), if there are a plurality of moving bodies 2 that are scheduled to move in a non-communicable area, the plurality of moving bodies 2 may be determined as the proxy moving body 2, and subsequent processing may be performed.
- the transmission unit 231 of the second mobile unit 2b has already received the distribution data from any substitute mobile unit 2, the transmission unit 231 immediately after step S241 (FIGS. 5 and 9) information is sent back to the proxy mobile unit 2 indicating that the transfer of the data is unnecessary.
- the proxy mobile unit 2 that has acquired the information indicating that the transfer of the distribution data is not necessary does not perform the processing after step S242 (FIGS. 5 and 9).
- Steps S146 and S147 (FIG. 5) in the above embodiment may be omitted.
- step S141 (FIG. 8) and step S136a (FIG. 8) in the above modification may be omitted.
- the proxy mobile unit 2 may not transmit the reception completion information to the server device 1 instead of the second mobile unit 2b.
- step S135 (FIGS. 4 and 8) in the above-described embodiment and modified example that the data to be distributed to the second moving body 2b can be distributed to the first moving body 2a by proxy.
- the processing after step S137 (FIGS. 4 and 8) may be performed.
- the first mobile unit 2a may not automatically transfer the distribution data to the second mobile unit 2b to the second mobile unit 2b.
- step S137 the transmission unit 131 sends the user terminal 3 or administrator terminal 4 used by the user of the first mobile body 2a
- a message may be sent requesting an operation to transfer the distribution data after arriving at the destination.
- the processing of the first moving body 2a shown in FIGS. 5 and 9 may be performed by the operation of the first moving body 2a by the user or administrator.
- Step S132 in the above embodiment and modification may be omitted.
- step S133 to the second moving body 2b You may make it acquire the delivery data of .
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Abstract
Description
上述のように、従来から、複数の移動体を共用するシェアリングサービスにおいて、複数の移動体とサーバ装置との間で無線通信を行うことが知られている。例えば、特許文献1に記載のように、各車両の状態を示す車両情報をサーバ装置に送信し、サーバ装置において各車両の状態を管理することが知られている。一方、ユーザによる各移動体の利用に関する情報及びファームウェア等の各移動体に固有の情報を含んだ配信データを、サーバ装置から各移動体に送信することが知られている。
図1は、データ配信システム100の全体構成の一例を示す図である。本開示の実施の形態に係るデータ配信システム100は、互いにBluetooth(登録商標)等の近距離無線通信が可能な複数の移動体2と、当該複数の移動体2を共用するシェアリングサービスの提供元が当該サービスを提供するためのサーバ装置1と、シェアリングサービスのユーザが使用するユーザ端末3と、シェアリングサービスの管理者が使用する管理者端末4を備える。
まず、図2を用いて、第一移動体2a及び第二移動体2bの公開鍵のデータをサーバ装置1に登録するときのデータ配信システム100の処理について説明する。図2は、第一移動体2a及び第二移動体2bの公開鍵のデータをサーバ装置1に登録するときのデータ配信システム100の処理の一例を示すシーケンス図である。
次に、図3を用いて、ユーザがサーバ装置1と通信可能な状態にある第一移動体2aを利用するときのデータ配信システム100の処理について説明する。図3は、ユーザがサーバ装置1と通信可能な状態にある第一移動体2aを利用するときのデータ配信システム100の処理の一例を示すシーケンス図である。
次に、第一移動体2aがサーバ装置1と通信可能な状態にあるが、第二移動体2bがサーバ装置1と通信不可能な状態にある場合を例にして、第二移動体2bへの配信データを第一移動体2aに代理で送信するときのデータ配信システム100の処理について説明する。図4は、通信圏外の第二移動体2bへの配信データを第一移動体2aに代理で送信するときのデータ配信システム100の処理の一例を示すシーケンス図である。
次に、図5を用いて、第一移動体2aが第二移動体2bが現在滞在しているエリアに移動し、第二移動体2bへの配信データを第二移動体2bに転送するときのデータ配信システム100の処理について説明する。図5は、第一移動体2aが第二移動体2bへの配信データを第二移動体2bに転送するときのデータ配信システムの処理の一例を示すシーケンス図である。
次に、図6を用いて、第一移動体2aが第二移動体2bが現在滞在しているエリアから他のエリアへ向けて出発し、第一移動体2aが配信データの受信の完了を示す情報をサーバ装置1に転送するときのデータ配信システム100の処理について説明する。図6は、第一移動体2aが配信データの受信の完了を示す情報をサーバ装置1に転送するときのデータ配信システムの処理の一例を示すシーケンス図である。
次に、ステップS134(図4)において、通信不可能エリアに移動予定の移動体2が複数存在する場合に、当該複数の移動体2の中から代理の移動体2を決定する方法について図7を用いて説明する。以下の説明では、第二移動体2bが現在滞在している通信不可能エリアに移動予定の移動体2として、第一移動体2aと第三移動体の二台の移動体2が存在する場合を例にして説明する。
Claims (11)
- コンピュータが、
互いに近距離無線通信可能な複数の移動体の移動予定を示すスケジュール情報を取得し、
前記複数の移動体のうち第一の移動体から自身の現在の状態を示す状態情報が受信できないことを検知した場合に、前記スケジュール情報に基づいて、前記第一の移動体が滞在している第一エリアに移動予定の第二の移動体を検索し、
前記第一の移動体への配信データを前記第二の移動体に送信する、
制御方法。 - 前記スケジュール情報は、前記複数の移動体が出発する予定のエリア及び日時を示す情報と、前記複数の移動体が到着する予定のエリア及び日時を示す情報と、を含む、
請求項1に記載の制御方法。 - 前記配信データは、前記第一の移動体を最新の状態にするデータであり、
前記配信データの送信では、
前記第一の移動体から直近に受信した前記状態情報が、前記第一の移動体の最新の状態を示していないことを検知した場合に、前記第二の移動体に前記配信データを送信する、
請求項1又は2に記載の制御方法。 - 前記配信データの送信では、
更に、前記配信データを前記第一の移動体に転送することを要求する情報を、前記第二の移動体に送信する、
請求項1に記載の制御方法。 - 前記配信データの送信では、
更に、前記スケジュール情報に基づいて、前記第一の移動体が前記第一エリアに所定時間以上滞在することを検知した場合、前記配信データの受信の完了を示す情報を前記第一の移動体から受信して前記コンピュータに転送することを要求する情報を、前記第二の移動体に更に送信する、
請求項4に記載の制御方法。 - 前記第二の移動体の検索では、
前記近距離無線通信による前記第一の移動体との通信速度と前記配信データのデータ量とに基づいて、前記第一の移動体への前記配信データの転送を完了するのに要する所要時間を算出し、
前記スケジュール情報に基づいて、前記第一エリアの滞在時間が前記所要時間よりも長い一以上の移動体を、前記第二の移動体として検索する、
請求項1に記載の制御方法。 - 前記第二の移動体の検索では、
前記スケジュール情報に基づいて、前記第一エリアの滞在時間が前記所要時間よりも長い二以上の移動体を検知した場合、前記スケジュール情報に基づいて、前記二以上の移動体のうち前記第一エリアから前記第一エリアとは別の第二エリアへ最初に移動する移動体を、前記第二の移動体として検索する、
請求項6に記載の制御方法。 - 前記第二の移動体の検索では、
前記近距離無線通信による前記第一の移動体との通信速度と前記配信データのデータ量とに基づいて、前記第一の移動体への前記配信データの転送を完了するのに要する所要時間を算出し、
前記スケジュール情報に基づいて、前記第一エリアの滞在時間が前記所要時間よりも短い二以上の移動体を、前記第二の移動体として検索し、
前記配信データの送信では、
前記配信データを前記第二の移動体の総数以下の複数個のデータに分割し、前記第二の移動体に含まれる前記総数以下の移動体に、前記複数個のデータを重複しないように送信する、
請求項1に記載の制御方法。 - 互いに近距離無線通信可能な複数の移動体の移動予定を示すスケジュール情報を取得する取得部と、
前記複数の移動体のうち第一の移動体から自身の現在の状態を示す状態情報が受信できないことを検知した場合に、前記スケジュール情報に基づいて、前記第一の移動体が滞在している第一エリアに移動予定の第二の移動体を検索する処理部と、
前記第一の移動体への配信データを前記第二の移動体に送信する送信部と、
を備えるサーバ装置。 - コンピュータを、
互いに近距離無線通信可能な複数の移動体の移動予定を示すスケジュール情報を取得する取得部と、
前記複数の移動体のうち第一の移動体から自身の現在の状態を示す状態情報が受信できないことを検知した場合に、前記スケジュール情報に基づいて、前記第一の移動体が滞在している第一エリアに移動予定の第二の移動体を検索する処理部と、
前記第一の移動体への配信データを前記第二の移動体に送信する送信部、
として機能させるプログラム。 - サーバ装置から複数の移動体へデータを送信するデータ配信システムであって、
前記複数の移動体は、それぞれ、
自身の現在の状態を示す状態情報を前記サーバ装置に送信する状態通知部と、
他の移動体と互いに近距離無線通信する近距離無線通信部と、
を備え、
前記サーバ装置は、
前記複数の移動体の移動予定を示すスケジュール情報を取得する取得部と、
前記複数の移動体のうち第一の移動体から前記状態情報が受信できないことを検知した場合に、前記スケジュール情報に基づいて、前記第一の移動体が滞在している第一エリアに移動予定の第二の移動体を検索する処理部と、
前記第一の移動体への配信データを前記第二の移動体に送信する送信部と、
を備える、
データ配信システム。
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