JP4044072B2 - How to share data - Google Patents

Description

  The present invention relates to a data sharing method, a terminal device, and a recording medium, and more particularly to a technique for maintaining the consistency of shared information stored in each terminal device connected on a network.

  In a computer system in which a plurality of terminal devices connected to each other via a network are configured as a group, a program stored in each terminal device and data corresponding to the program are used as shared data in the group. In some cases, the system is operated so that the shared data is the latest in all terminal devices in the group. In such a computer system, a server device is installed in the group, and this server device broadcasts the update information of the shared data generated in each terminal device in the group to all the terminal devices in the group. By trying to maintain the integrity of the shared data.

  By the way, when a computer system executes a multi-participation type application such as a role playing game, for example, terminal devices in the group may be frequently replaced due to mid-participation or withdrawal. If the shared data is kept up-to-date, the processing load on the server device becomes very high. Therefore, in such a computer system, a high-performance server device is required, and it is difficult to realize the computer system economically.

  Therefore, the present invention has been made in view of the circumstances described above, and in a computer system, the consistency of shared information stored in each terminal device is maintained while reducing the processing load on each terminal device. An object of the present invention is to provide a data sharing method, a terminal device, and a recording medium.

In order to solve the above-described problem, the present invention provides a basic method for sharing data in a group in a data sharing method for sharing data in a group configured by a plurality of terminal devices connected to each other via a network. and if an update to the shared data containing member data relating to each terminal of the group is generated, in order from the plurality of terminal devices, each terminal device in the group updated information about the update A broadcast terminal determining step for determining the broadcast transmission terminal device, which is any one of the terminal devices for broadcast transmission, in each of the terminal devices; and the broadcast transmission terminal device determined in the broadcast terminal determining step. On the other hand, a transmission step of transmitting the update information from each terminal device, and the broadcast transmission terminal device transmits the update information to the member. A broadcast transmission step for broadcasting to a terminal device corresponding to the data; and an update step for updating the shared data with the received update information in each terminal device receiving the broadcast-transmitted update information. A method for sharing prepared data is provided.

  In the data sharing method, the present invention further includes a determination number storing step of storing a determination number corresponding to the update information in association with the shared data in each of the terminal devices. In addition to the update information, the discrimination number stored in the discrimination number storage step is transmitted, and the broadcast transmission step uses a discrimination number larger than the received discrimination number as a new discrimination number, In addition to the update information, a new identification number is broadcast.

  In the data sharing method, the broadcast transmission terminal device compares the received discrimination number with the discrimination number stored in the discrimination number storage step to determine the size of the discrimination number. A determination number determination step for determining, wherein the broadcast transmission step determines that the received determination number is greater than or equal to the determination number stored in the determination number storage step in the determination number determination step; In this case, the broadcast transmission is performed.

  Further, the present invention provides a compulsory broadcast availability information storing step of storing forced broadcast availability information indicating whether or not the update information is forcibly broadcasted in each terminal device in the data sharing method. The transmission step is characterized in that the forced broadcast availability information is transmitted in addition to the update information and the identification number.

  Also, in the data sharing method according to the present invention, the broadcast transmission step causes the broadcast transmission when the forced broadcast availability information indicates that the update information is forcibly broadcast. It is characterized by that.

  Further, the present invention provides the data sharing method, wherein each terminal device receives the update information and the new determination number, and the new determination number and the determination number storage step. A determination number determination step for comparing the stored determination number with a determination number to determine the size of the determination number, and the update step includes a step of determining whether the newly received determination number is the determination number in the determination number determination step. The update information is updated to the shared data when it is determined that the number is larger than the determination number stored in the use number storage step.

  Further, according to the present invention, in the above data sharing method, in each terminal apparatus, each terminal apparatus is preliminarily set by using a continuous integer from n to “n + total number of terminals in group−1” (n is an integer) as a terminal number. Terminal number allocating step for allocating without duplication, and the determination method includes the terminal number corresponding to a remainder obtained by dividing the determination number stored in the determination number storing step by the number of terminal devices corresponding to member data. The terminal device assigned is determined as the broadcast transmission terminal device.

  In the data sharing method according to the present invention, the member data includes a performance value of each terminal device, and the determination method determines the broadcast transmission terminal device in consideration of the performance value. It is characterized by that.

  Further, according to the present invention, in the data sharing method described above, in each of the terminal devices, only the terminal device whose performance value included in the member data exceeds a predetermined reference value is changed from n to “ a terminal number assigning step of assigning consecutive integers up to the number of terminal devices exceeding the reference value in the n + group minus 1 ”(n is an integer) as terminal numbers, and the determination method includes the determination The terminal device to which the terminal number corresponding to the remainder obtained by dividing the discrimination number stored in the number storage step by the number of terminal devices exceeding the reference value among the terminal devices corresponding to the member data is assigned, The broadcast transmission terminal device is determined.

  In the data sharing method, the present invention provides a next broadcast terminal determination step in which the next broadcast transmission terminal apparatus determines the next broadcast transmission terminal apparatus to broadcast the next update information, and the next broadcast terminal determination process. A start notification transmission step for transmitting a broadcast transmission start notification indicating the start of the broadcast transmission together with the update information to the next broadcast transmission terminal device determined in the broadcast terminal determination step, and the broadcast transmission is completed. An end notification transmission step for transmitting to the next broadcast transmission terminal device a broadcast transmission end notification indicating that the update information, the broadcast transmission start notification, and the broadcast transmission in the next broadcast transmission terminal device. A notification receiving step for receiving a transmission end notification, and the broadcast transmission end notification is received when a predetermined time has elapsed since the broadcast notification start notification was received in the notification receiving step. If not, is characterized in that a proxy multicast transmission step of broadcast transmission to the terminal apparatus corresponding to the update information to the member data.

  In the data sharing method, the present invention provides an update information receiving step for receiving the update information transmitted from each terminal device in the next broadcast transmission terminal device, and the update information is the broadcast transmission. In the case of update information to be transmitted to the terminal device, a proxy broadcast transmission step of transmitting the update information to the terminal device corresponding to the member data is provided.

  In the data sharing method, the present invention provides a response determination step for determining whether or not there is a response from the broadcast transmission terminal device that has transmitted the update information in each terminal device, and the next update information. A next broadcast terminal determination step for determining a next broadcast transmission terminal device to be broadcasted, and when the transmission step determines that there is no response in the response determination step, the next broadcast terminal determination step The update information is transmitted to the next-time broadcast transmission terminal device determined in (1).

  In the data sharing method, the present invention further comprises a proxy broadcast transmission step in which the next broadcast transmission terminal device broadcasts the update information to a terminal device corresponding to the member data. It is characterized by.

  Further, according to the present invention, in the data sharing method, each terminal device broadcasts a failure determination step for determining whether or not another terminal device belonging to the group is in failure, and next update information. A next broadcast terminal determining step for determining a next broadcast transmission terminal device, and the transmitting step is performed when the other terminal device is determined to be in failure in the failure determination step. Update information that deletes member data related to the terminal device corresponding to the other communication terminal from the shared data is transmitted to the next broadcast transmission terminal device determined in the determining step.

  Further, the present invention provides a download request step for requesting a download of the shared data to any terminal device belonging to the group in the terminal device newly added to the group in the data sharing method, In the terminal device newly added to the group, in the shared data receiving step for receiving the shared data from the terminal device requested for download in the download request step, and in the terminal device newly added to the group, Update information receiving step for receiving update information broadcasted within the group from the terminal device requested to download, and updating the received update information with respect to the received shared data after the download is completed. Update information update process to be performed and the download is requested In the terminal device, a shared data transmission step for transmitting shared data to the newly added terminal device, and an update for transmitting the update information received by broadcast transmission to the newly added terminal device And an information relay process.

  In the data sharing method according to the present invention, the member data includes a performance value of each terminal device, and the performance value is predetermined in the terminal device requested to be downloaded. A request notification step for requesting the terminal device exceeding the value to execute the download; and the terminal device requested to execute the download, the terminal device newly added to the newly added terminal device It is characterized by executing a download.

  Also, in the data sharing method according to the present invention, the update information relay step includes the newly added terminal from update information generated immediately after starting the download to the newly added terminal device. Update information generated until update information related to member data to which a device has been added is transmitted to the newly added terminal device.

  Next, the present invention relates to basic data shared in the group and member data related to each terminal device in the group in a terminal device belonging to a group composed of a plurality of terminal devices connected to each other via a network. A shared data storage means for storing shared data including the data, and when the update occurs to the shared data, according to a predetermined determination method determined in advance, from among the plurality of terminal devices Broadcast terminal determination means for determining a broadcast transmission terminal apparatus which is any one terminal apparatus that broadcasts update information to each terminal apparatus in the group, and the broadcast terminal determined by the broadcast terminal determination means. A transmission means for transmitting the update information to a report transmission terminal device; and the update transmission device as the broadcast transmission terminal device. Broadcast transmission means for broadcasting to a terminal device corresponding to the data, and update means for updating the shared data with the received update information, as each terminal apparatus for receiving the broadcast-updated information. A terminal device comprising:

  The present invention further includes a determination number storage unit that stores a determination number corresponding to the update information in association with the shared data in the terminal device, wherein the transmission unit includes the update information, The discrimination number stored in the discrimination number storage means is transmitted, and the broadcast transmission means sets a discrimination number larger than the received discrimination number as a new discrimination number, and adds a new discrimination number to the update information. It is characterized in that a unique identification number is broadcast.

  Further, according to the present invention, in the terminal device, as the broadcast transmission terminal device, the received discrimination number is compared with the discrimination number stored in the discrimination number storage means to determine the size of the discrimination number. A determination number determination means for determining, wherein the broadcast transmission means determines that the received determination number is greater than or equal to the determination number stored in the determination number storage means by the determination number determination means; In this case, the broadcast transmission is performed.

  Further, the present invention, in the terminal device, further comprises forced broadcast availability information storage means for storing forced broadcast availability information indicating whether or not the update information is forcibly broadcasted, the transmission means, In addition to the update information and the identification number, the forced broadcast availability information is transmitted.

  Further, the present invention provides the terminal device, wherein the broadcast transmission means transmits the broadcast when the forced broadcast availability information indicates that the update information is forcibly broadcast. It is a feature.

  According to the present invention, in the above terminal device, receiving means for receiving the update information and the new discrimination number, the new discrimination number and the discrimination number stored by the discrimination number storage unit are provided. A judgment number judging means for judging the size of the judgment number by comparison, and the updating means stores the newly received judgment number in the judgment number storage means by the judgment number judgment means. The update information is updated to the shared data when it is determined that the number is larger than the determination number.

  Further, according to the present invention, in the terminal device described above, a terminal number assigned in advance to each terminal device without duplication as a continuous integer from n to “n + total number of terminals in group−1” (n is an integer). An allocating unit, wherein the determination method includes a terminal device to which the terminal number corresponding to a remainder obtained by dividing the determination number stored by the determination number storage unit by the number of terminal devices corresponding to member data is allocated. The broadcast transmission terminal device is determined.

  In the terminal device, the member data may include a performance value of each terminal device, and the determination method may determine the broadcast transmission terminal device in consideration of the performance value. It is a feature.

  Further, according to the present invention, in the above terminal device, only the terminal device whose performance value included in the member data exceeds a predetermined reference value determined in advance from “n exceeds the reference value within the n + group”. Terminal number allocating means for allocating consecutive integers up to the number of terminal devices −1 ”(n is an integer) as terminal numbers without duplication, and the determination method stores the determination stored in the determination number storage means The terminal device to which the terminal number that matches the remainder obtained by dividing the business number by the number of terminal devices exceeding the reference value among the terminal devices corresponding to the member data is determined as the broadcast transmission terminal device. It is characterized by that.

  Further, the present invention provides the next broadcast terminal determining means for determining the next broadcast transmission terminal device for broadcasting the next update information as the broadcast transmission terminal device in the terminal device, and the next broadcast terminal. A start notification transmission means for transmitting a broadcast transmission start notification indicating the start of the broadcast transmission together with the update information to the next broadcast transmission terminal device determined by the determination means, and the broadcast transmission is completed An end notification transmission means for transmitting a broadcast transmission end notification indicating to the next broadcast transmission terminal device, and the update information, the broadcast transmission start notification, and the broadcast transmission as the next broadcast transmission terminal device. A notification receiving means for receiving an end notification; and a case in which the broadcast transmission end notification is not received when a predetermined time has elapsed after the notification receiving means has received the broadcast notification start notification. It is characterized in that a proxy broadcast transmitting means for transmitting broadcast to the terminal apparatus corresponding to the update information to the member data.

  Also, the present invention provides the terminal device, wherein the next broadcast transmission terminal device is an update information receiving means for receiving the update information transmitted from each terminal device, and the update information is the broadcast transmission terminal device. When the update information is to be transmitted to the terminal device, a proxy broadcast transmission unit is provided that broadcasts the update information to the terminal device corresponding to the member data.

  Further, the present invention provides a response determination means for determining whether or not there is a response from the broadcast transmission terminal device that has transmitted the update information, and a next broadcast that transmits the next update information by broadcast. A next broadcast terminal determining means for determining a transmission terminal device, and the transmission means determines the next broadcast terminal determined by the next broadcast terminal determining means when the response determining means determines that there is no response. The update information is transmitted to a transmission terminal device.

  Further, the present invention is characterized in that, in the above terminal device, as the next broadcast transmission terminal device, there is provided a proxy broadcast transmission means for broadcasting the update information to a terminal device corresponding to the member data. It is said.

  Further, the present invention provides a failure determination means for determining whether or not other terminal devices belonging to the group are in failure in the terminal device, and a next broadcast transmission terminal device for broadcasting the next update information. A next broadcast terminal determining means for determining, and the transmission means determines the next broadcast terminal determining means next time when the failure determining means determines that the other terminal device is in failure. Update information for deleting member data related to the terminal device corresponding to the other communication terminal from the shared data is transmitted to the broadcast transmission terminal device.

  Further, the present invention provides a download request means for requesting one of the terminal devices belonging to the group to download the shared data when the terminal device is newly added to the group; When newly added to the group, the shared data receiving means for receiving the shared data from the terminal device requested to be downloaded by the download request means and the broadcast within the group when newly added to the group Update information receiving means for receiving the transmitted update information from the terminal device requested to download, and update information updating means for updating the received update information to the received shared data after the download is completed. And the newly added terminal device as the terminal device requested to download. A shared data transmission means for transmitting the shared data and is characterized in that the update information received by broadcast transmission comprising an update information relay means for transmitting to the newly added terminal.

  Further, the present invention provides the terminal device, wherein the member data includes a performance value of each terminal device, and the terminal device requested to be downloaded has a predetermined reference value for which the performance value is predetermined. Request notifying means for requesting the terminal device that has exceeded to execute the download, and the terminal device that has been requested to execute the download, the download to the newly added terminal device It is characterized by executing.

  Further, the present invention provides the terminal device, wherein the update information relay means determines whether the newly added terminal device is based on update information generated immediately after starting the download to the newly added terminal device. Update information generated until update information related to the added member data is generated is transmitted to the newly added terminal device.

  Next, the present invention relates to basic data shared within the group in a recording medium recording a program for sharing data within a group constituted by a plurality of terminal devices connected to each other via a network, and Update information related to the update from among the plurality of terminal devices according to a predetermined determination method when an update occurs to shared data including member data related to each terminal device in the group Broadcast terminal device, which is any one terminal device that broadcasts to each terminal device in the group, is determined in each terminal device, and the determined broadcast transmission terminal device Update information is transmitted, and the broadcast transmission terminal device transmits the update information to the terminal device corresponding to the member data. Te is broadcast transmission, the each terminal device which has received the update information transmitted broadcast, to provide a recording medium which records a program for executing that to update the shared data by the update information the received computer.

  According to the present invention, in the recording medium on which the program is recorded, each terminal device stores a determination number corresponding to the update information in association with the shared data, and the determined broadcast transmission terminal device On the other hand, in addition to the update information, the discrimination number stored in the discrimination number storage step is transmitted, and in the broadcast transmission terminal device, a discrimination number larger than the received discrimination number is a new discrimination number. In addition to the update information, a new identification number is broadcast.

  Further, the present invention, in the recording medium recording the program, in the broadcast transmission terminal device, the received discrimination number and the stored discrimination number are compared to determine the size of the discrimination number, In the determination, when it is determined that the received determination number is greater than or equal to the stored determination number, the broadcast transmission is performed.

  Further, according to the present invention, in the recording medium on which the program is recorded, each terminal device stores forced broadcast availability information indicating whether or not the update information is forcibly broadcast. In addition to the update information and the identification number, the forced transmission capability information is transmitted to the report transmission terminal device.

  Further, in the present invention, in the recording medium in which the program is recorded, in the broadcast transmission terminal device, when the received forced broadcast availability information indicates that the update information is forcibly broadcasted, It is characterized by being broadcast.

  In the recording medium storing the program, the present invention allows each terminal device to receive the update information and the new determination number, and includes the new determination number and the stored determination number. In comparison, when the determination number is determined and the update information transmitted in the same broadcast is received, it is determined in the determination that the newly received determination number is larger than the stored determination number. The update information is updated to the shared data.

  Further, according to the present invention, in the recording medium on which the program is recorded, in each terminal device, a continuous integer from n to “the total number of terminals in the group n−1” (n is an integer) is previously set as a terminal number. In the determination method, the terminal device to which the terminal number corresponding to the remainder obtained by dividing the stored identification number by the number of terminal devices corresponding to the member data is assigned. The information transmission terminal device is determined.

  In the recording medium storing the program according to the present invention, the member data includes a performance value of each terminal device, and the determination method includes the broadcast transmission terminal device in consideration of the performance value. A recording medium having recorded thereon a program characterized by being determined.

  In the recording medium storing the above program, the present invention provides n only for a terminal device whose performance value included in the member data exceeds a predetermined reference value in each terminal device. To “n + the number of terminal devices exceeding the reference value in the group −1” (n is an integer) is assigned as a terminal number without duplication, and the determination method uses the stored identification number as a member. A terminal device to which the terminal number corresponding to the remainder divided by the number of terminal devices exceeding the reference value among terminal devices corresponding to data is determined as the broadcast transmission terminal device. Yes.

  Further, the present invention allows the broadcast transmission terminal device to determine the next broadcast transmission terminal device for broadcasting the next update information in the recording medium on which the program is recorded, and determines the determined next broadcast transmission terminal. A broadcast transmission start notification indicating the start of broadcast transmission is transmitted to the device together with the update information, and a broadcast transmission end notification indicating that the broadcast transmission has ended is sent to the next broadcast transmission terminal device. And at the next broadcast transmission terminal device, the update information, the broadcast transmission start notification and the broadcast transmission end notification are received, and a predetermined time after the broadcast notification start notification is received. When the broadcast transmission end notification is not received when elapses, the update information is broadcasted to the terminal device corresponding to the member data, That.

  In the recording medium storing the program, the present invention allows the next broadcast transmission terminal device to receive the update information transmitted from each terminal device, and the update information is transmitted to the broadcast transmission terminal device. When the update information is to be transmitted, the update information is broadcasted to the terminal device corresponding to the member data.

  The present invention also allows each terminal device to determine whether or not there is a response from the broadcast transmission terminal device that transmitted the update information on the recording medium recording the above-mentioned program, and the next update information is broadcast. The next broadcast transmission terminal apparatus to be transmitted is determined, and when it is determined that there is no response in the determination, the update information is transmitted to the determined next broadcast transmission terminal apparatus. .

  Further, the present invention is characterized in that in the recording medium on which the program is recorded, the update information is broadcasted to the terminal device corresponding to the member data at the next broadcast transmission terminal device.

  Further, the present invention allows each terminal device to determine whether or not other terminal devices belonging to the group have a failure in the recording medium on which the program is recorded, and broadcasts the next update information. A terminal corresponding to the other communication terminal with respect to the determined next-time broadcast transmission terminal device when the other terminal device is determined to be faulty in the determination. Update information that deletes member data related to the device from the shared data is transmitted.

  According to the present invention, in the recording medium in which the program is recorded, a terminal device newly added to the group causes any one of the terminal devices belonging to the group to request download of the shared data. In the newly added terminal device, the shared data is received from the terminal device requested to be downloaded, and in the newly added terminal device, the update information broadcast in the group is updated. The download is received from the terminal device requested, and after the download is completed, the received update information is updated with respect to the received shared data. Send shared data to the added terminal device and receive it by broadcast transmission. It is characterized in that to transmit the said update information the for the newly added terminal.

  Further, according to the present invention, in the recording medium on which the program is recorded, the member data includes a performance value of each terminal device, and the performance value is predetermined in the terminal device requested to be downloaded. In the terminal device requested to execute the download, the terminal device exceeding the reference value is requested to execute the download, and the download is performed on the newly added terminal device. It is characterized by executing.

  Further, the present invention provides the newly added terminal device when the update information received by the broadcast transmission is transmitted to the newly added terminal device in the recording medium on which the program is recorded. The update information generated immediately after the download starts for the newly added terminal device until the update information related to the member data to which the newly added terminal device is added is newly added. It is characterized by transmitting to a terminal device.

  Next, preferred embodiments of the present invention will be described with reference to the drawings. [1] Configuration of Embodiment [1.1] Outline Configuration of Computer System FIG. 1 shows a computer system 1 according to an embodiment of the present invention. An outline structure is shown. As shown in FIG. 1, a computer system 1 is a computer system that executes a multi-participant application, and includes a plurality of terminal devices 5 connected via a network. Here, the plurality of terminal devices 5 are executed by a multi-participation application, for example, and form a group for each game of role playing game. Then, the terminal device 5 receives information on each terminal device 5 belonging to the same group and information on a virtual position, attribute, etc. on the game in which each terminal device 5 participates in the group. It is stored as shared data shared between the terminal devices 5. Further, the terminal device 5 has one terminal device (hereinafter referred to as a broadcast transmission terminal device) in which update information generated by updating the shared data is sequentially determined for each update information based on a predetermined algorithm. Send to. The broadcast transmission terminal device that has received the update information broadcasts the update information to all other terminal devices 5 in the same group, and updates the shared data at the terminal device that has received the update information. Thus, the consistency of the shared data among the terminal devices 5 is maintained. Below, the terminal device 5 which comprises the computer system 1 is demonstrated in detail.

  [1.2] Configuration of Terminal Device [1.2.1] General Configuration of Terminal Device The general configuration of the terminal device 5 will be described with reference to FIG. As shown in FIG. 2, the terminal device 5 can be broadly divided into a shared information storage unit 10 that stores shared data shared between the terminal devices 5 in the group, and a broadcast transmission terminal device that broadcasts update information. Broadcast request control unit 20 that performs control when requesting to the network, broadcast transmission control unit 30 that performs control when the update information is transmitted to other terminal devices in the group, and update to shared data Shared data update control unit 40 that controls the download, a download control unit 50 that performs control when receiving the shared data stored in the group when it joins a new group, and a newly added terminal A relay transmission control unit 60 that performs control when relay transmission of update information generated in a group to a newly added terminal device when shared data is downloaded to the device is provided. It has been.

  [1.2.1.1] Schematic Configuration of Shared Information Storage Unit Next, a schematic configuration of the shared information storage unit 10 will be described with reference to FIG. The shared information storage unit 10 is a rewritable memory that stores shared data shared between the terminal devices 5 in the group. The shared data includes determination number data 11, member data 12, and basic data 13. Here, the discrimination number data 11 is data for storing a discrimination number given every time the update information is broadcast, and stores the discrimination number transmitted by the latest broadcast transmission.

  The member data 12 includes information on each terminal device 5 belonging to the same group, for example, a terminal device identification code, a terminal number for determining a broadcast transmission terminal device (hereinafter referred to as a terminal number), and specifications of the terminal device. Data for storing information and the like. Here, for example, when three terminal devices belong to a group, any numerical value of “0”, “1”, or “2” is not duplicated in each terminal device. Assigned to. This numerical value is used when determining the broadcast transmission terminal device. Regarding the terminal number, when the terminal device increases or decreases, the terminal device that recognizes the increase or decrease is, for example, the terminal device registered at the top of each terminal device identification code stored in the member data 12 The terminal device corresponding to the identification code transmits a message to that effect, and the terminal device that has received the message sends a message to the broadcast terminal device as a member list update information. Is done.

  Also, the specification information of the terminal device stores the capacity of the hard disk and memory, the performance of the CPU, the communication speed of the network to which the terminal device is connected, and the like. With respect to the specification information, each terminal device periodically transmits to the terminal device corresponding to the terminal device identification code registered at the top of the terminal device identification codes stored in the member data 12, for example. Spec information is transmitted to the terminal device, and the terminal device that has received the spec information is finally updated by requesting the broadcast transmission terminal device to transmit the broadcast as member list update information.

  The basic data 13 is data for storing information on the virtual position, attributes, and the like on the game of the terminal device 5 corresponding to each terminal device identification code stored in the member data 12.

  [1.2.1.2] Detailed Configuration of Broadcast Request Control Unit Next, a detailed configuration of the broadcast request control unit 20 will be described with reference to FIG. As shown in FIG. 2, the broadcast request control unit 20 includes a transmission destination determination unit 21, a broadcast request transmission unit 22, and a failure determination unit 23. Here, when an update to the shared data occurs, the transmission destination determination unit 21 sends a broadcast transmission terminal device that broadcasts update information regarding the update to all other terminal devices 5 in the group. Determine based on a predetermined algorithm.

This algorithm determines one terminal device from the terminal devices 5 in the same group as a broadcast transmission terminal device, and broadcast transmission terminal devices in order so that the difference in processing load between the terminal devices is not widened. Any algorithm can be used. For example, terminal numbers that are consecutive integers from “0” to “total number of terminal devices in group−1” are assigned to each terminal device 5 in the group in advance without duplication, and are described below. The terminal device 5 to which the terminal number corresponding to the number obtained by the calculation formula represented by [Formula 1] is assigned is determined as the broadcast transmission terminal device.
“Distinction number” mod “Total number of terminal devices in group” …… [Formula 1]
Here, mod, for example, in the case of A mod B, obtains the remainder when A is divided by B. According to [Expression 1], “1” is added to the identification number every time update information is broadcast, so the calculated number is changed from “0” to “total number of terminal devices in group −1”. "In order. Therefore, the terminal devices 5 in the group are determined as broadcast transmission terminal devices in order each time update information is broadcast.

  In addition, the broadcast request transmission unit 22 updates the broadcast transmission terminal device determined by the transmission destination determination unit 21 with the current identification number, forced broadcast availability information, and broadcast transmission. A broadcast request signal for requesting is sent. Here, the compulsory broadcast permission / prohibition information is compulsory even when the discrimination number transmitted when requesting broadcast transmission is smaller than the discrimination number stored in the broadcast transmission terminal device. This is information indicating whether or not to perform broadcast transmission. In addition, the failure determination unit 23 transmits a broadcast if the broadcast request transmission unit 22 does not transmit the broadcast within a predetermined time from the broadcast transmission terminal device to which the broadcast request signal is transmitted. It is determined that the terminal device is out of order, and this is notified to the transmission destination determination unit 21. In this case, the transmission destination determination unit 21 broadcasts the terminal device 5 to which the terminal number corresponding to the number calculated by [Expression 1] described above is added when “1” is added to the discrimination number. Determine as a terminal device.

  [1.2.1.3] Detailed Configuration of Broadcast Transmission Control Unit Next, a detailed configuration of the broadcast request control unit 30 will be described with reference to FIG. As shown in FIG. 2, the broadcast request control unit 30 includes a broadcast notification reception unit 31, a broadcast request reception unit 32, a broadcast transmission execution unit 33, and a broadcast notification transmission unit 34. Yes. Here, the broadcast notification receiving unit 31 performs the next broadcast transmission when the broadcast transmission terminal device starts and ends the broadcast transmission to the other terminal devices in the group. A notification indicating the start or end of the broadcast transmission transmitted to the terminal device 5 determined as the terminal device is received. The broadcast request receiving unit 32 receives a broadcast request signal transmitted from another terminal device 5 in the group.

  Also, when the broadcast request receiving unit 32 receives the broadcast request signal, the broadcast transmission executing unit 33 adds “1” to the determination number given to the update information, and then Update information is broadcast to other terminal devices 5 in the group. In this case, the broadcast transmission execution unit 33 confirms that the broadcast notification receiving unit 31 has received the notification indicating the end of the broadcast transmission transmitted from the previous broadcast transmission terminal device, and then transmits the broadcast. I do. In addition, when the discrimination number received with the broadcast request signal is smaller than the discrimination number stored in the shared information storage unit 10, the broadcast transmission execution unit 33, as a rule, performs broadcast transmission. Not performed. However, the broadcast transmission execution unit 33 performs broadcast transmission when the forced broadcast availability information received with the broadcast request signal indicates that broadcast transmission is forcibly performed. Further, the broadcast notification transmission unit 34 transmits the broadcast to the other terminal device 5 with respect to the terminal device 5 determined as the next broadcast notification terminal device to perform the next broadcast transmission. A notification indicating the start or end of report transmission is transmitted.

  [1.2.1.4] Detailed Configuration of Shared Data Update Control Unit Next, the shared data update control unit 40 performs update processing such as registration, change, and deletion for the shared data stored in the shared information storage unit. Control. Further, the shared data update control unit 40 updates the update information to the shared data when the determination number transmitted by the broadcast transmission is larger than the determination number stored in the shared information storage unit 10. To do.

  [1.2.1.5] Detailed Configuration of Download Control Unit Next, a detailed configuration of the download control unit 50 will be described with reference to FIG. As shown in FIG. 2, for example, the download control unit 50 is a part that performs control when downloading shared data from another terminal device 5 when participating in a game halfway, a download request unit 51, shared data reception Unit 52, an update information receiving unit 53, an update information storage unit 54, and an update information reflecting unit 55. Here, the download request unit 51 transmits a download request signal for requesting download of shared data to any of the terminal devices 5 belonging to the same group. Further, the shared data receiving unit 52 receives the shared data transmitted from the terminal device that has received the download request signal transmitted by the download request unit 51.

  The update information receiving unit 53 receives the update information transmitted from the broadcast transmission terminal device via the terminal device that has received the download request signal. The update information storage unit 54 stores the update information received by the update information reception unit 53. Further, the update information reflecting unit 55 stores the update information stored in the update information storage unit 54 in the shared information storage unit 10 when the download of the shared data from the terminal device that has received the download request signal is completed. Update shared shared data.

  [1.2.1.6] Detailed Configuration of Relay Transmission Control Unit Next, a detailed configuration of the relay transmission control unit 60 will be described with reference to FIG. As shown in FIG. 2, the relay transmission control unit 60 is a part that performs control when downloading shared data to a terminal device that has participated in the game, for example, a download request receiving unit 61, shared data transmission A unit 62 and an update information relay unit 63 are provided. Here, the download request receiving unit 61 receives a download request signal transmitted from a newly added terminal device. Further, the shared data transmission unit 62 starts downloading shared data to the newly added terminal device, and relays the update information transmitted from the broadcast transmission terminal device to be newly added. A relay transmission start signal for starting relay transmission of update information to be transmitted to the update information relay unit 63 is transmitted. Further, the update information relay unit 63 receives the update information transmitted from the broadcast transmission terminal device by broadcast, and transmits the received update information to the newly added terminal device.

  [1.2.2] Hardware Configuration of Terminal Device The hardware configuration of the terminal device 5 will be described with reference to FIG. As illustrated in FIG. 4, the terminal device 5 includes, for example, a central processing unit (CPU) 71 that performs overall processing and control processing, a read-only storage device (ROM) 73 that stores various control programs, A main memory (RAM) 72 for temporarily storing operating programs and data, the above-described broadcast request control unit 20, the broadcast transmission control unit 30, the shared data update control unit 40, the download control unit 50, and , An auxiliary storage device (HDD) 74 that stores a program for controlling the relay transmission control unit 60 and the like, and a communication control device that serves as a connection interface when connecting to other terminal devices via a network 75, an input device 76 for inputting various data, and a display device 77 for displaying processing results and the like. The CPU 71, RAM 72, ROM 73, HDD 74, communication control device 75, input device 76, and display device 77 are connected to each other via a bus (BUS) 78.

  The auxiliary storage device 74 may be built in the terminal device 5 or may be externally attached. Further, the auxiliary storage device 74 does not have to be provided in all the terminal devices 5, and instead of the auxiliary storage device 74, for example, a device for reading a recording medium such as a CD-ROM device and a DVD-ROM device. Etc. may be provided. In this case, the CD-ROM device or the DVD-ROM device includes the above-described broadcast request control unit 20, broadcast transmission control unit 30, shared data update control unit 40, download control unit 50, and relay transmission control. A CD or DVD storing a program for controlling the unit 60 or the like is read. Further, the input device 76 and the display device 77 are not necessarily provided in the terminal device 5. For example, when one terminal device belongs to a plurality of groups at the same time, one terminal device logically functions as a plurality of terminal devices. In the terminal device, when the input device 76 and the display device 77 are physically occupied, other logical terminal devices may not have the input device 76 and the output device 77. .

  [2] Operation of Embodiment [2.1] Basic Operation of Broadcast Transmission Next, a basic operation example of broadcast transmission will be described with reference to FIG. Here, as a precondition in this operation, as shown in FIG. 13, for each terminal device P, Q, R, S, “0”, “1”, “2” and “3” are assigned as terminal numbers. At the present time, it is assumed that “5” is stored as the discrimination number in the discrimination number data 11 of each terminal device P, Q, R, and S.

  For example, when the update to the shared data occurs in the terminal device P (step S1), the transmission destination determination unit 21 of the terminal device P determines the broadcast transmission terminal device based on a predetermined algorithm. (Step S2). Specifically, for example, in the case of the group shown in FIG. 5, the determination number at the present time is “5”, and there are four terminal devices belonging to the current group. (Calculated from the member data 12), and when these values are substituted into the above-mentioned [Expression 1], 5 mod 4 = 1 is obtained. Accordingly, the terminal device Q to which “1” is assigned as the terminal number is determined as a broadcast transmission terminal device that broadcasts the update information generated this time to all other terminal devices in the group.

  Next, the broadcast request transmission unit 21 of the terminal device P updates the update information X generated by updating the shared data, the discrimination number “5” registered in the shared data 10 at the present time, and the broadcast A broadcast request signal for requesting transmission is transmitted to the terminal device Q which is a broadcast transmission terminal device (step S3).

  Next, the transmission destination determination unit 21 of the terminal device Q determines a terminal device to be the next broadcast transmission terminal device based on a predetermined algorithm (step S4). A method for determining the next broadcast transmission terminal device will be described in detail. For example, a determination number is added by adding “1” to “5” which is a determination number registered in the shared data 10 at present. 6 ”. Then, by substituting “6”, which is a new identification number, and “4”, which is the total number of terminal devices in the group, into the above-described [Equation 1], 6 mod 4 = 2 is obtained. Accordingly, the terminal device R to which “2” is assigned as the terminal number is determined as a broadcast transmission terminal device that broadcasts update information to be generated next time to all other terminal devices in the group.

  Next, the broadcast notification transmission unit 34 of the terminal device Q transmits a broadcast transmission start notification indicating that broadcast transmission will be started from now on to the terminal device R which is the next broadcast transmission terminal device. The broadcast transmission execution unit 33 of the terminal device Q transmits the update information X and the new determination number “6” to the terminal device R which is the next broadcast transmission terminal device (step S5). . Here, in the terminal device Q, the shared data update control unit 40 updates the update information X and the identification number “6” to the shared information storage unit 10.

  The broadcast notification receiving unit 31 of the terminal device R receives the broadcast transmission start notification transmitted from the terminal device Q, and recognizes that the broadcast transmission has started. Then, the shared data update control unit 40 of the terminal device R updates the update information X received from the terminal device Q and the discrimination number “6” to the shared information storage unit 10 (step S6).

  Further, the broadcast transmission execution unit 33 of the terminal device Q transmits the update information X and the new identification number “to the terminal devices P and S corresponding to the terminal device identification code stored in the member data 12. 6 ″ is broadcast (step S7). Then, the shared data update control unit 40 of the terminal devices P and S sends the update information X received from the terminal device Q, which is a broadcast transmission terminal device, and the identification number “6” to the shared information storage unit 10. (Steps S8 and S8 ′).

  Next, the broadcast notification transmission unit 34 of the terminal device Q transmits a broadcast transmission end notification indicating that the broadcast transmission has ended to the terminal device R which is the next broadcast transmission terminal device (step S9). ). The broadcast notification receiving unit 31 of the terminal device R receives the broadcast transmission end notification transmitted from the terminal device Q, and recognizes that the broadcast transmission has ended (step S10).

  [2.2] Operation when broadcast transmission terminal apparatus does not normally terminate broadcast transmission Next, referring to FIG. 6, an operation example when the broadcast transmission terminal apparatus does not normally terminate broadcast transmission. Will be described. Here, as a precondition, for each of the terminal devices P, Q, R, and S, “0”, “1”, “2”, and “3” that are consecutive integers starting from “0” are respectively set. Assign as a terminal number. At the present time, it is assumed that “5” is stored as the discrimination number in the discrimination number data 11 of each terminal device P, Q, R, and S. Further, among the operations shown in FIG. 6, the steps for performing the same processing as the operation shown in FIG. 5 referred to when the basic operation of the broadcast transmission in the [2.1] column described above is explained. The same reference numerals are assigned and detailed description is omitted.

  First, in step S6 shown in FIG. 6, the broadcast notification receiving unit 31 of the terminal device R receives the broadcast transmission start notification transmitted from the terminal device Q, and recognizes that the broadcast transmission has started. . Then, the shared data update control unit 40 of the terminal device R updates the update information X received from the terminal device Q and the discrimination number “6” to the shared information storage unit 10.

  Next, the broadcast notification receiving unit 31 of the terminal device R waits for a predetermined time in advance to receive the broadcast transmission end notification transmitted from the terminal device Q (step S7a). In step S7a, when the broadcast notification receiving unit 31 of the terminal device R has waited for a predetermined time and cannot receive the broadcast transmission end notification from the terminal device Q, the broadcast notification executing unit 33 Transmits the update information X and the new identification number “6” to the terminal devices P and S corresponding to each terminal device identification code stored in the member data 12 (step S8a). . Then, the shared data update control unit 40 of the terminal devices P and S updates the update information X received from the terminal device R and the determination number “6” to the shared information storage unit 10 (Step S1). S8a, S8a ′).

  [2.3] Operation when transmission to terminal device is not normally performed Next, with reference to FIG. 7, an operation example when transmission to the terminal device is not possible will be described. Here, as a precondition, for each of the terminal devices P, Q, R, and S, “0”, “1”, “2”, and “3” that are consecutive integers starting from “0” are respectively set. Assign as a terminal number. At the present time, it is assumed that “5” is stored as the discrimination number in the discrimination number data 11 of each terminal device P, Q, R, and S. Further, among the operations shown in FIG. 7, the steps for performing the same processing as the operation shown in FIG. 5 referred to when the basic operation of the broadcast transmission in the [2.1] column described above is explained. The same reference numerals are assigned and detailed description is omitted.

  First, in step S3 shown in FIG. 7, the broadcast request transmission unit 21 of the terminal device P updates the update information X generated by updating the shared data, the discrimination number “5” currently registered in the shared data 10. And a broadcast request signal for requesting broadcast transmission to the terminal device Q which is a broadcast transmission terminal device.

  Next, when it is determined by the failure determination unit 23 of the terminal device P that the update information X, the determination number, and the broadcast request signal are not normally transmitted to the terminal device Q (step S4b). The transmission destination determination unit 21 determines a terminal device to be a broadcast transmission terminal device instead of the terminal device Q (step S5b). The determination method of the proxy broadcast transmission terminal device will be described in detail. For example, a determination number is added by adding “1” to “5” which is a determination number currently registered in the shared data 10. 6 ”. Then, by substituting “6”, which is a new identification number, and “4”, which is the total number of terminal devices in the group, into the above-described [Equation 1], 6 mod 4 = 2 is obtained. Accordingly, the terminal device R to which “2” is assigned as the terminal number is determined to be a broadcast transmission terminal device that performs broadcast transmission instead of the terminal device Q.

  Next, the broadcast transmission execution unit 33 of the terminal device R updates the update information X and a new determination for the terminal devices P and S corresponding to each terminal device identification code stored in the member data 12. The number “6” is broadcasted (step S6b). Here, in the terminal device R, the shared data update control unit 40 updates the update information X and the discrimination number “6” to the shared information storage unit 10. Then, the shared data update control unit 40 of the terminal devices P and S updates the update information X received from the terminal device R and the determination number “6” to the shared information storage unit 10 (Step S1). S7b, S7b ′).

  [2.4] Operation when Deleting a Terminal Device An operation example when deleting a terminal device will be described with reference to FIG. Here, as a precondition, for each of the terminal devices P, Q, R, and S, “0”, “1”, “2”, and “3” that are consecutive integers starting from “0” are respectively set. Assign as a terminal number. At the present time, it is assumed that “5” is stored as the discrimination number in the discrimination number data 11 of each terminal device P, Q, R, and S.

  First, it is assumed that the terminal device P performs some kind of communication with the terminal device S. When no response is obtained from the terminal device S through this communication, the terminal device P determines that the terminal device S is out of order (step S1c). Next, among the terminal device identification codes stored in the member data 12, for example, the terminal device P sends the terminal device S to the terminal device corresponding to the terminal device identification code registered at the top. To indicate that is a failure. In FIG. 8, the terminal device P notifies the terminal device R that the terminal device S is out of order (step S2c).

  The terminal device R that has received the notification indicating that the terminal device S is out of order generates update information for deleting the data corresponding to the terminal device S from the member data 12 (step S3c). Then, the transmission destination determination unit 21 of the terminal device R determines the broadcast transmission terminal device based on a predetermined algorithm (step S4c). Specifically, for example, in the case of the group shown in FIG. 8, the determination number currently registered in the shared data 10 is “5” in the group shown in FIG. Since there are three terminal devices belonging to the group, substituting these values into the above-mentioned [Expression 1] yields 5 mod 3 = 2. Accordingly, the terminal device R assigned with “2” as the terminal number is determined to be the broadcast transmission terminal device that broadcasts the update information generated this time to all other terminal devices in the group. .

  Next, the transmission destination determination unit 21 of the terminal device R determines a terminal device to be the next broadcast transmission terminal device based on a predetermined algorithm (step S5c). A method for determining the next broadcast transmission terminal device will be described in detail. For example, a determination number is added by adding “1” to “5” which is a determination number registered in the shared data 10 at present. 6 ”. Then, by substituting “6”, which is a new identification number, and “3”, which is the total number of terminal devices in the group, into [Expression 1] described above, 6 mod 3 = 0 is obtained. Accordingly, the terminal device P to which “0” is assigned as the terminal number is determined as the next broadcast transmission terminal device.

  Next, the broadcast notification transmission unit 34 of the terminal device R transmits a broadcast transmission start notification indicating that broadcast transmission will be started from now on to the terminal device P which is the next broadcast transmission terminal device. The broadcast transmission execution unit 33 of the terminal device R transmits the update information X and the new determination number “6” to the terminal device P that is the next broadcast transmission terminal device (step S6c). .

  The broadcast notification receiving unit 31 of the terminal device P receives the broadcast transmission start notification transmitted from the terminal device R and recognizes that the broadcast transmission has started. Then, the shared data update control unit 40 of the terminal device P updates the update information X received from the terminal device R and the discrimination number “6” to the shared information storage unit 10 (step S7c).

  Further, the broadcast transmission execution unit 33 of the terminal device R updates the update information X and the new determination number “6” with respect to the terminal device Q corresponding to the terminal device identification code stored in the member data 12. Is transmitted (step S8c). Then, the shared data update control unit 40 of the terminal device Q updates the update information X received from the terminal device R, which is a broadcast transmission terminal device, and the discrimination number “6” to the shared information storage unit 10. (Step S9c).

  Next, the broadcast notification transmission unit 34 of the terminal device R transmits a broadcast transmission end notification indicating that the broadcast transmission has ended to the terminal device P which is the next broadcast transmission terminal device (step S10c). ). The broadcast notification receiving unit 31 of the terminal device P receives the broadcast transmission end notification transmitted from the terminal device R, and recognizes that the broadcast transmission has ended (step S11c).

  [2.5] Operation when Terminal Device Leaves Group An example of operation when the terminal device leaves the group will be described with reference to FIG. Here, as a precondition, for each of the terminal devices P, Q, R, and S, “0”, “1”, “2”, and “3” that are consecutive integers starting from “0” are respectively set. Assign as a terminal number. At the present time, it is assumed that “5” is stored as the discrimination number in the discrimination number data 11 of each terminal device P, Q, R, and S.

  For example, a case where the terminal device P withdraws from the group will be described. First, among the terminal device identification codes stored in the member data 12, for example, the terminal device P is connected to the terminal device corresponding to the terminal device identification code registered at the top. Notification of withdrawal from the group. In FIG. 9, the terminal device P notifies the terminal device R that the terminal device P is withdrawn from the group (step S1d).

  The terminal device R that has received the notification that the terminal device P is leaving the group generates update information that deletes the data corresponding to the terminal device P from the member data 12 (step S2d). Then, the transmission destination determination unit 21 of the terminal device R determines the broadcast transmission terminal device based on a predetermined algorithm (step S3d). Specifically, for example, in the case of the group shown in FIG. 9, the determination number registered in the shared data 10 is “5” at the present time, Since there are three terminal devices belonging to the group, substituting these values into the above-mentioned [Expression 1] yields 5 mod 3 = 2. Here, the terminal device R also generates update information for changing the assignment of the terminal number of the member data 12 when the update information for deleting the data corresponding to the terminal device P from the member data 12 is generated. Specifically, the terminal numbers of the terminal devices Q, R, and S are changed to “0”, “1”, and “2”, respectively. Accordingly, the terminal device S to which “2” is assigned as the terminal number is determined as a broadcast transmission terminal device that broadcasts the update information generated this time to all other terminal devices in the group.

  Next, the broadcast request transmitting unit 21 of the terminal device R updates the update information X generated by updating the shared data, the discrimination number “5” registered in the shared data 10 at the present time, and the broadcast A broadcast request signal for requesting transmission is transmitted to the terminal device S which is a broadcast transmission terminal device (step S4d).

  Next, the transmission destination determination unit 21 of the terminal device S determines a terminal device to be the next broadcast transmission terminal device based on a predetermined algorithm (step S5d). A method for determining the next broadcast transmission terminal device will be described in detail. For example, a determination number is added by adding “1” to “5” which is a determination number registered in the shared data 10 at present. 6 ”. Then, by substituting “6”, which is a new identification number, and “3”, which is the total number of terminal devices in the group, into [Expression 1] described above, 6 mod 3 = 0 is obtained. Therefore, the terminal device Q to which “0” is assigned as the terminal number is determined as the next broadcast transmission terminal device.

  Next, the broadcast notification transmission unit 34 of the terminal device S transmits a broadcast transmission start notification indicating that broadcast transmission will be started from now on to the terminal device Q which is the next broadcast transmission terminal device. The broadcast transmission execution unit 33 of the terminal device S transmits the update information X and the new determination number “6” to the terminal device Q that is the next broadcast transmission terminal device (step S6d). .

  The broadcast notification receiving unit 31 of the terminal device Q receives the broadcast transmission start notification transmitted from the terminal device S and recognizes that the broadcast transmission has started. Then, the shared data update control unit 40 of the terminal device Q updates the update information X received from the terminal device S and the determination number “6” to the shared information storage unit 10 (step S7d).

  In addition, the broadcast transmission execution unit 33 of the terminal device S transmits the update information X and the new determination number “6” to the terminal device R corresponding to the terminal device identification code stored in the member data 12. Is transmitted (step S8d). Then, the shared data update control unit 40 of the terminal device R updates the shared information storage unit 10 with the update information X received from the terminal device S that is a broadcast transmission terminal device and the identification number “6”. (Step S9d).

  Next, the broadcast notification transmission unit 34 of the terminal device S transmits a broadcast transmission end notification indicating that the broadcast transmission has ended to the terminal device Q which is the next broadcast transmission terminal device (step S10d). ). The broadcast notification receiving unit 31 of the terminal device Q receives the broadcast transmission end notification transmitted from the terminal device S and recognizes that the broadcast transmission has ended (step S11d).

[2.6] Operation when Adding Terminal Device An operation example when adding a terminal device will be described with reference to FIGS. 10 to 12.
[2.6.1] Outline Operation when Adding Terminal Device First, the outline operation when adding a terminal device will be described with reference to FIG. 10 and FIG. The diagrams shown in FIGS. 10 and 11 show a state in which a terminal device S is newly added to a group of computer systems configured by terminal devices P, Q, and R. The state illustrated in FIG. 10 represents, for example, a state in which the terminal device S requests the terminal device R to be added to the group. In this case, the terminal device R downloads the shared data stored in the shared information storage unit 10 to the terminal device S.

  Next, the state shown in FIG. 11 shows that, when downloading from the terminal device R to the terminal device S, the update information for the shared data is updated in the group constituted by the terminal devices P, Q, and R. When this occurs, the terminal device R that has received the update information represents a state in which the update information is relay-transmitted to the terminal device S as data separate from the download data. Further, in this state, the terminal device R generates update information for registering the terminal device S in the member data 12, and transmits the generated update information to the broadcast transmission terminal device at that time. As a result, the update information is broadcast and the member data 12 stored in all the terminal devices in the group is updated. With this update, the terminal device S is registered in the member data 12, and update information generated in the group thereafter can be received by broadcast transmission from the broadcast transmission terminal device. Therefore, after that, even if the terminal device R receives the update information transmitted by the broadcast transmission, it is not necessary to relay the update information to the terminal device S. Then, when all the downloads are completed, the group is composed of four terminal devices P, Q, R, and S.

  [2.5.2] Detailed Operation when Adding Terminal Device Next, detailed operation when adding a terminal device will be described with reference to FIG. First, the download request unit 51 of the terminal device S newly added to the computer system group transmits a download request signal for requesting download of shared data to the terminal device R (step S1e).

  The download request reception unit 61 of the terminal device R that has received the download request signal transmits a request reception signal indicating that the download request signal has been received from the terminal device S to the shared data transmission unit 62. The shared data transmission unit 62 transmits the shared data stored in the shared information storage unit 10 as download data to the terminal device S (step S2e), and updates information transmitted from the broadcast transmission terminal device to the terminal. A relay transmission start signal for starting relay transmission to be transmitted to the device S is transmitted to the update information relay unit 63.

  The shared data receiving unit 52 of the terminal device S that has received the data from the terminal device R registers the received download data in the shared information storage unit 10 (step S3e). When update information for updating the shared data is generated in the group, the update information is transmitted from the broadcast transmission terminal device uniquely determined by a predetermined algorithm, for example, from the broadcast transmission execution unit 33 of the terminal device Q. It is transmitted to the device R (step S4e).

  Then, the shared data update control unit 40 of the terminal device R updates the received update information with respect to the shared data stored in the shared information storage unit 10, and updates the received update information to the update information relay unit 63. To send. The update information relay unit 63 transmits the received update information to the terminal device S (step S5e). The update information receiving unit 53 of the terminal device S that has received the update information from the terminal device R registers the received update information in the update information storage unit 54 (step S6e).

  Next, the broadcast request transmission unit 22 of the terminal device R newly registers the terminal device S in the member data 12 for the broadcast transmission terminal device determined by the transmission destination determination unit 21, for example, the terminal device Q. Update information is transmitted (step S7e). The broadcast transmission execution unit 33 of the terminal device Q broadcasts the update information to other terminal devices in the group (step S8e). Then, the shared data update control unit 40 of the terminal device R updates the received update information with respect to the member data 12 of the shared data stored in the shared information storage unit 10, and relays the received update information to the update information relay Transmit to the unit 63. The update information relay unit 63 transmits the received update information to the terminal device S (step S9e). The update information receiving unit 53 of the terminal device S that has received the update information from the terminal device R registers the received update information in the update information storage unit 54 (step S10e).

  Here, the relay transmission control unit 60 of the terminal device R is for the content of the update information relayed to the terminal device S by the update information relay unit 63 to register the terminal device S in the member data 12. If there is, the update information relay unit 63 stops relaying the update information, and the update information received thereafter is not relay-transmitted to the terminal device S (step S11e).

  In the terminal device S, when the download from the terminal device R is completed (step S12e), the update information reflecting unit 55 uses the update information stored in the update information storage unit 54 as the shared information storage unit 10. The shared data stored in is updated (step S13e).

  [3] Advantages of the embodiment As described above, the number of broadcast transmission terminal devices is limited to one, and since the terminal devices in the group play the role of the broadcast transmission terminal device in order, one server. Compared to the processing load of the server device in a system configured by installing the device, the processing load of each terminal device as the broadcast transmission terminal device is significantly reduced.

  In addition, since the update information generated for the shared data is sent by broadcast with a determination number, the shared data can be updated in the order in which the update information is generated. Also, the update information generated for the member data is also subject to broadcast transmission with the same identification number as the basic data, so that the identification numbers stored in each terminal device are the same. Because it is guaranteed that the same member data is stored, it is possible to send broadcasts based on the unified member data, and to maintain the consistency of shared data in each terminal device in the same group be able to.

  In addition, by providing the relay transmission control unit 60 in the terminal device, even if the member data related to the newly added terminal device is registered in the member data of each terminal device in the group, Update information generated in the terminal device can be transmitted to the newly added terminal device. Therefore, it is possible to maintain the consistency of the shared data in each terminal device in the group including the newly added terminal device.

  [4] Modified Example of Embodiment [4.1] First Modified Example In the above-described embodiment, all the terminal devices in the group are targets of the broadcast transmitting terminal device. The terminal need not be the target of the broadcast transmission terminal device. For example, a predetermined reference value may be set in the specification information of the member data, and only terminal devices exceeding the reference value may be targeted for the broadcast transmission terminal device. As a result, it is possible to exclude terminal devices with low processing capabilities from the targets of broadcast transmission terminal devices. In order to perform this in the above-described embodiment, a terminal number is assigned only to a terminal device exceeding the reference value, and the total number of terminals in the group targets only terminal devices exceeding the reference value. Can be calculated as follows.

  [4.2] Second Modification Also, in the above-described embodiment, when the terminal device is deleted or the terminal device is withdrawn from the group, the deletion or withdrawal notification is placed at the top of the member data 12. The terminal device corresponding to the registered terminal device identification code is requested, and the terminal device receiving the notification requests the broadcast transmission terminal device to send the broadcast, but it is not necessarily a specific terminal device. There is no need to request a broadcast transmission via. For example, a terminal device that recognizes that another terminal device has failed, or a terminal device that leaves the group may directly request broadcast transmission to the broadcast transmission terminal device.

  [4.3] Third Modification Also, in the above-described embodiment, the case where a plurality of pieces of update information to which the same identification number is assigned is transmitted to the broadcast transmission terminal device is not particularly mentioned. However, in this case, the broadcast transmission terminal device may broadcast only the update information received first among the update information to which the same identification number is assigned (in this case, the broadcast transmission terminal device). Update information that is not transmitted is discarded), and it is determined whether or not update information with the same identification number sent later is subject to broadcast transmission depending on the content of the forced update availability information. May be.

  [4.4] Fourth Modification Also, in the above-described embodiment, terminal numbers from “0” to “total number of terminal devices in group−1” are consecutive for each terminal device 5 in the group. Although integers are assigned in advance, it is not always necessary to start from “0”. For example, consecutive integers from n to “n + total number of terminal devices in group−1” (n is an integer) may be assigned. In this case, when determining the broadcast transmission terminal device, the terminal device corresponding to the terminal number that matches the numerical value obtained by adding n to the numerical value obtained by [Equation 1] It is determined as a report transmission terminal device.

  [4.5] Fifth Modification Also, in the above-described embodiment, when a terminal device is newly added, all the terminal devices in the group have received a download request from the newly added terminal device. In this case, the download can be performed on the newly added terminal device, but only a specific terminal device may perform the download. For example, a predetermined reference value may be set in the specification information of the member data, and a terminal device that exceeds the reference value may download. Specifically, the terminal device that has received a download request from the newly added terminal device, for a terminal device whose performance value exceeds a predetermined reference value among the specification information of the member data, A request is made to execute the download, and the terminal device that has received this request executes the download for the newly added terminal device. Thereby, it is possible to exclude a terminal device having a low processing capability from a terminal device that executes download. When there are multiple terminal devices that exceed the predetermined reference value, it is optimal to select the terminal device with the highest performance value as the download execution terminal, but select any terminal device as the download execution terminal. It is good to do.

  As described above, according to the present invention, in a computer system, a data sharing method capable of achieving consistency of shared information stored in each terminal device while reducing the processing load on each terminal device. A terminal device and a recording medium can be provided.

It is a figure which shows schematic structure of the computer system in embodiment. It is a block diagram which shows schematic structure of the terminal device of FIG. It is a figure which shows the structure of the shared information storage part of FIG. It is a figure which shows the hardware constitutions of the terminal device of FIG. It is a sequence diagram which shows the basic operation | movement of the broadcast transmission in embodiment. It is a sequence diagram which shows operation | movement when the broadcast transmission terminal device in embodiment does not complete | finish broadcast transmission normally. It is a sequence diagram which shows operation | movement when it cannot transmit normally with respect to the broadcast transmission terminal device in embodiment. It is a sequence diagram which shows operation | movement in the case of deleting the terminal device in embodiment. It is a sequence diagram which shows operation | movement when the terminal device in embodiment leaves a group. It is a figure which shows the outline | summary operation | movement in the case of adding the terminal device in embodiment. It is a figure which shows the outline | summary operation | movement in the case of adding the terminal device in embodiment. It is a sequence diagram which shows detailed operation | movement in the case of adding the terminal device in embodiment. It is a figure which shows the precondition of each terminal device in the operation example of embodiment.

Explanation of symbols

1 …… Computer system,
5 …… Terminal device,
10: Shared information storage unit (shared data storage means, identification number storage means),
20: Broadcast request control unit,
21 …… Destination determination unit (broadcast terminal determination means, next broadcast terminal determination means),
22 …… Broadcast request transmission unit (transmission means, compulsory broadcast availability information storage means),
23 .. failure determination unit (response determination means, failure determination means),
30: Broadcast transmission control unit,
31 …… Broadcast notification receiving unit (notification receiving means),
32 …… Broadcast request receiving part (update information receiving process),
33 ...... Broadcast transmission execution unit (broadcast transmission means, identification number determination means, proxy broadcast transmission means),
34 ...... Broadcast notification transmission unit (start notification transmission means, end notification transmission means),
40... Shared data update control unit (update means, terminal number assigning means)
50 …… Download control unit,
51 …… Download request section (download request means),
52 …… Shared data receiver (shared data receiver),
53 …… Update information receiving section (update information receiving means),
54 …… Update information storage unit,
55 …… Update information reflection unit (update information update means),
60 …… Relay transmission control unit,
61 …… Download request receiver,
62... Shared data transmission unit (shared data transmission means)
63... Update information relay unit (update information relay means).

Claims (1)

In a data sharing method for sharing data within a group composed of a plurality of terminal devices connected to each other via a network,
When an update occurs to the shared data including basic data shared within the group and member data related to each terminal device within the group,
In each terminal device, a broadcast transmission terminal device, which is any one terminal device that broadcasts update information related to the update to each terminal device in the group in order from the plurality of terminal devices. Broadcast terminal determination process to be determined,
For the broadcast transmission terminal device determined in the broadcast terminal determination step, a transmission step for transmitting the update information from each terminal device;
A broadcast transmission step of broadcasting the update information to the terminal device corresponding to the member data by the broadcast transmission terminal device;
A data sharing method comprising: an update step of updating the shared data with the received update information in each terminal device that has received the broadcast-transmitted update information.

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