JP2006018343A - Information processor, network system, and function expansion method for information processor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information processor facilitating expansion of a function of the information processor without requiring manual work for installation or trouble on distribution. <P>SOLUTION: The expansion function becoming active by a function active key transmitted from another information processor via a network is installed in the information processor. The information processor decrypts a periodically received encryption key in each case, decides whether it is a right function active key or not, and makes the expansion function corresponding to the key active if it is the right key. Thereby, the expansion function is enabled only in a period wherein the other information processor is connected to the network. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an information processing apparatus connectable to a network, a network configured by connecting a plurality of information processing apparatuses, and a function expansion method of the information processing apparatus.

In general, as a method of extending the function of an information processing apparatus such as a PC (Personal Computer), in the case of software, a software package for extending the function of an already installed program is taken in from outside via a network. Ordinarily, a recording medium in which the software package is recorded is obtained and incorporated into the system by installation work (see, for example, Patent Document 1). As for hardware, there is a method of mounting an expansion unit to the information processing apparatus main body (see, for example, Patent Document 2).
JP 2003-067191 A JP 2004-038293 A

  However, a method for incorporating a software package for extending the function of a program into the system by installation work adds a function to prevent the diversion of the software package due to unauthorized duplication in the case of a paid software package. Thus, it is necessary to consider means for protecting the rights of the software provider, and the user needs to obtain the software package and perform installation work.

  In addition, in the method of mounting an expansion unit to the information processing apparatus main body in order to expand the hardware, it is necessary to manage a distribution system in which the user can obtain the expansion unit. It was linked to an increased burden.

  In view of such circumstances, the present invention provides an information processing apparatus, a network system, and an information processing that can easily perform the function expansion of the information processing apparatus without requiring manual operation for installation or distribution work. An object of the present invention is to provide a function expansion method for a device.

  In order to solve the above problems, an information processing apparatus according to the present invention is an information processing apparatus connectable to a network, and receives key information periodically transmitted from another information processing apparatus connected to the network. A key receiving means for authenticating the key information received by the key receiving means, and a function control means for enabling the use of a predetermined function during a period when the authentication success is determined by the key authenticating means. To do.

  In the present invention, when the correct key information is transmitted from another information processing apparatus connected to the network, the predetermined function is available, and when the other information processing apparatus is disconnected from the network, the key information The transmission is interrupted, and the function is added to use again. That is, the function of the information processing apparatus is expanded only during a period in which another information processing apparatus that possesses key information for making a predetermined function available is connected to the network.

  In the information processing apparatus of the present invention, the predetermined function is implemented in advance by hardware, software, or both, and is a function that cannot be used by default. The predetermined function may be a function that can be used by cooperating with a predetermined function installed in another information processing apparatus.

  An information processing apparatus according to another aspect of the present invention is an information processing apparatus that can be connected to a network and is mounted on another information processing apparatus connected to the network in order to solve the above-described problem. The apparatus includes key generation means for generating key information for enabling use of a predetermined function, and key transmission means for periodically transmitting key information generated by the key generation means.

  The information processing apparatus according to the present invention periodically transmits the key information to an information processing apparatus that requires acquisition of key information to enable use of a predetermined function, and the information processing apparatus performs the function. It can be made available.

  In the information processing apparatus of the present invention, the predetermined function is implemented in advance by hardware, software, or both, and is a function that cannot be used by default. The predetermined function may be a function that can be used by cooperating with a predetermined function installed in another information processing apparatus.

  In order to solve the above-described problem, a network system based on another aspect of the present invention is a network system including a network and a plurality of information processing devices connectable to the network. The apparatus includes key generation means for generating key information for enabling use of a predetermined function implemented in the other information processing apparatus connected to the network, and key information generated by the key generation means Key transmitting means for periodically transmitting to the information processing apparatus, and the other information processing apparatus includes key receiving means for receiving key information periodically transmitted from one information processing apparatus connected to the network; A key authenticating means for authenticating the key information received by the key receiving means, and the use of a predetermined function during a period in which the authentication success is determined by the key authenticating means. It is intended to and a function control means for enabling.

  In the network system of the present invention, in the other information processing apparatus, a predetermined function is available during a period in which correct key information is transmitted from one information processing apparatus connected to the network, and the other information processing apparatus Is disconnected from the network, the transmission of key information is interrupted, and the function is added to use again. That is, the function of the other information processing apparatus is expanded only during the period in which one information processing apparatus that possesses key information for making a predetermined function available is connected to the network.

  In the network system of the present invention, the predetermined function of the other information processing apparatus is implemented in advance by hardware, software, or both, and is a function that cannot be used by default. Further, the predetermined function may be a function that can be used by cooperating with the predetermined function installed in one information processing apparatus.

  According to another aspect of the present invention, there is provided a function expansion method for an information processing apparatus in which key information periodically transmitted from another information processing apparatus connected to a network by a key receiving unit is provided. The key authentication means authenticates the key information received by the reception means, and the function control means enables the use of a predetermined function during a period in which the authentication success is determined by the key authentication means. Features.

  In the present invention, when the correct key information is transmitted from another information processing apparatus connected to the network, the predetermined function is available, and when the other information processing apparatus is disconnected from the network, the key information The transmission is interrupted, and the function is added to use again. That is, the function of the information processing apparatus is expanded only during a period in which another information processing apparatus that possesses key information for making a predetermined function available is connected to the network.

  In the information processing apparatus of the present invention, the predetermined function is implemented in advance by hardware, software, or both, and is a function that cannot be used by default. The predetermined function may be a function that can be used by cooperating with a predetermined function installed in another information processing apparatus.

  According to the information processing apparatus, the network system, and the function expansion method of the information processing apparatus of the present invention, it is possible to easily expand the function of the information processing apparatus without requiring manual work for installation or distribution work. Can do.

[Basic configuration of network system and information processing apparatus: FIGS. 1 to 4]
FIG. 1 shows an example of a network system according to the present invention, in which a plurality of information processing apparatuses 1, 2, 3, 4 are connected via a network 9.

(Information processing apparatus and information processing controller)
As for the information processing apparatus 1, the information processing apparatus 1 includes an information processing controller 11 as a computer function unit. The information processing controller 11 includes a main processor 21-1, sub processors 23-1, 23-2, and 23-3, a DMAC (direct memory access controller) 25-1, and a DC (disk controller) 27-1.

  The main processor 21-1 performs schedule management of program execution (data processing) by the sub processors 23-1, 23-2, and 23-3 and general management of the information processing controller 11 (information processing apparatus 1). . However, a program other than the management program may be operated in the main processor 21-1. In that case, the main processor 21-1 also functions as a sub processor. The main processor 21-1 has an LS (local storage) 22-1.

  There may be one sub-processor, but preferably there are a plurality of sub-processors. This example is a plurality of cases.

  Each of the sub processors 23-1, 23-2, and 23-3 executes a program and processes data in parallel and independently under the control of the main processor 21-1. Further, in some cases, the program in the main processor 21-1 can be configured to operate in cooperation with the programs in the sub processors 23-1, 23-2, and 23-3. A function program described later is also a program that operates in the main processor 21-1. The sub processors 23-1, 23-2, and 23-3 also have LS (local storage) 24-1, 24-2, and 24-3.

  The DMAC 25-1 accesses a program and data stored in a main memory 26-1 including a DRAM (dynamic RAM) connected to the information processing controller 11, and the DC 27-1 is used for the information processing controller 11. Are accessed to the external recording units 28-1 and 28-2.

  The external recording units 28-1 and 28-2 may be fixed disks (hard disks) or removable disks, and are optical disks such as MO, CD ± RW, DVD ± RW, memory disks, SRAM (static RAM), ROM, and the like. Various types can be used. Therefore, although DC27-1 is called a disk controller, it is an external recording unit controller.

  As in the example of FIG. 1, the information processing controller 11 can be configured so that a plurality of external recording units 28 can be connected to the information processing controller 11.

  The main processor 21-1, the sub processors 23-1, 23-2, and 23-3, the DMAC 25-1, and the DC 27-1 are connected by a bus 29-1.

  An identifier that can uniquely identify the information processing apparatus 1 including the information processing controller 11 throughout the entire network is assigned to the information processing controller 11 as an information processing apparatus ID.

  Similarly, an identifier that can identify each of the main processor 21-1 and each of the sub processors 23-1, 23-2, and 23-3 is assigned as a main processor ID and a sub processor ID.

  The information processing controller 11 is preferably configured as a one-chip IC (integrated circuit).

  The other information processing apparatuses 2, 3, and 4 are similarly configured. Here, even if the unit having the same parent number has a different branch number, the same function is assumed unless otherwise noted. Further, in the following description, when the branch number is omitted, it is assumed that the difference in the branch number does not occur.

(Access to main memory from each sub processor)
As described above, each sub-processor 23 in one information processing controller independently executes a program and processes data, but different sub-processors simultaneously read or write to the same area in the main memory 26. If done, data inconsistencies can occur. Therefore, access from the sub processor 23 to the main memory 26 is performed according to the following procedure.

  As shown in FIG. 2A, the main memory 26 is composed of memory locations that can specify a plurality of addresses. Each memory location is allocated an additional segment for storing information indicating the state of the data. The additional segment includes an F / E bit, a sub processor ID, and an LS address (local storage address). Each memory location is also assigned an access key to be described later. The F / E bit is defined as follows.

  The F / E bit = 0 indicates that the data being processed being read by the sub-processor 23 or invalid data that is not the latest data because it is empty and cannot be read. The F / E bit = 0 indicates that data can be written to the memory location, and is set to 1 after writing.

  The F / E bit = 1 indicates that the data at the memory location has not been read by the sub-processor 23 and is the latest unprocessed data. The data in the memory location can be read and set to 0 after being read by the sub-processor 23. Further, the F / E bit = 1 indicates that the memory location cannot write data.

  Furthermore, it is possible to set a read reservation for the memory location in the state where the F / E bit = 0 (read disabled / write enabled). When a read reservation is made for a memory location with the F / E bit = 0, the sub processor 23 adds the sub processor ID and LS of the sub processor 23 as read reservation information to an additional segment of the memory location where the read reservation is made. Write the address.

  Thereafter, when data is written to the memory location reserved for reading by the sub-processor 23 on the data writing side and the F / E bit is set to 1 (readable / not writable), it is added to the additional segment as read reservation information in advance. Read to the written sub-processor ID and LS address.

  When it is necessary to process data in multiple stages by a plurality of sub-processors, the sub-processor 23 that performs the process in the previous stage controls the read / write of the data in each memory location in this way. Immediately after the data is written at a predetermined address on the main memory 26, another sub-processor 23 that performs the subsequent processing can read the data after the preprocessing.

  As shown in FIG. 2B, the LS 24 in each sub-processor 23 is also configured by memory locations that can specify a plurality of addresses. An additional segment is similarly allocated for each memory location. The additional segment includes a busy bit.

  When the sub-processor 23 reads the data in the main memory 26 to the memory location of its own LS 24, it reserves by setting the corresponding busy bit to 1. No other data can be stored in the memory location where the busy bit is 1. After reading to the memory location of the LS 24, the busy bit becomes 0 and can be used for any purpose.

  As shown in FIG. 2A, the main memory 26 connected to each information processing controller further includes a plurality of sandboxes. The sandbox defines an area in the main memory 26, and each sandbox is assigned to each sub processor 23 and can be used exclusively by the sub processor. That is, each sub-processor 23 can use a sandbox assigned to itself, but cannot access data beyond this area.

  The main memory 26 is composed of a plurality of memory locations, and the sandbox is a set of these memory locations.

  Further, in order to realize exclusive control of the main memory 26, a key management table as shown in FIG. The key management table is stored in a relatively high-speed memory such as SRAM in the information processing controller, and is associated with the DMAC 25. Each entry in the key management table includes a sub processor ID, a sub processor key, and a key mask.

  The process when the sub processor 23 uses the main memory 26 is as follows. First, the sub processor 23 outputs a read or write command to the DMAC 25. This command includes its own sub-processor ID and the address of the main memory 26 that is the use request destination.

  Before executing this command, the DMAC 25 refers to the key management table and checks the sub processor key of the sub processor of the use request source. Next, the DMAC 25 compares the checked sub-processor key of the use request source with the access key allocated to the memory location shown in FIG. Execute the above command only when two keys match.

  In the key mask on the key management table shown in FIG. 2C, when the arbitrary bit becomes 1, the corresponding bit of the sub-processor key associated with the key mask may become 0 or 1. it can.

  For example, assume that the sub-processor key is 1010. Normally, this sub-processor key only allows access to a sandbox with 1010 access keys. However, if the key mask associated with this sub-processor key is set to 0001, the match determination between the sub-processor key and the access key is masked only for the digit whose key mask bit is set to 1. This sub-processor key 1010 enables access to a sandbox having an access key whose access key is either 1010 or 1011.

  As described above, the sandbox exclusivity of the main memory 26 is realized. That is, when it is necessary to process data in multiple stages by a plurality of sub-processors in one information processing controller, by configuring as described above, the sub-processor that performs the process in the previous stage and the process in the subsequent stage are processed. Only the sub processor that performs the access can access a predetermined address in the main memory 26, and data can be protected.

  For example, it can be used as follows. First, immediately after the information processing apparatus is activated, the values of the key masks are all zero. It is assumed that a program in the main processor is executed and operates in cooperation with a program in the sub processor. When the processing result data output by the first sub-processor is temporarily stored in the main memory and desired to be input to the second sub-processor, the corresponding main memory area must naturally be accessible from either sub-processor. is there. In such a case, the program in the main processor appropriately changes the value of the key mask and provides a main memory area that can be accessed from a plurality of sub processors, thereby enabling multi-stage processing by the sub processors. .

More specifically, it is a multi-step process in the order of data from another information processing apparatus → processing by the first sub processor → first main memory area → processing by the second sub processor → second main memory area. When processing is done,
Sub-processor key of the first sub-processor: 0100
First main memory area access key: 0100,
Sub-processor key of the second sub-processor: 0101,
Access key for second main memory area: 0101
If the setting is maintained, the second sub processor cannot access the first main memory area. Therefore, by setting the key mask of the second sub processor to 0001, it is possible to allow the second sub processor to access the first main memory area.

(Software cell generation and configuration)
In the network system of FIG. 1, software cells are transmitted between the information processing apparatuses 1, 2, 3, and 4 for distributed processing between the information processing apparatuses 1, 2, 3, and 4. That is, the main processor 21 included in the information processing controller in a certain information processing apparatus generates a software cell including a command, a program, and data, and transmits the software cell to another information processing apparatus via the network 9 to perform processing. Can be dispersed.

  FIG. 3 shows an example of the configuration of the software cell. The software cell in this example is composed of a transmission source ID, a transmission destination ID, a response destination ID, a cell interface, a DMA command, a program, and data as a whole.

  The transmission source ID includes the network address of the information processing device that is the transmission source of the software cell, the information processing device ID of the information processing controller in the device, the main processor 21 provided in the information processing controller in the information processing device, and The identifier (main processor ID and sub processor ID) of each sub processor 23 is included.

  The transmission destination ID and the response destination ID include the same information about the information processing device that is the transmission destination of the software cell and the information processing device that is the response destination of the execution result of the software cell, respectively.

  The cell interface is information necessary for using the software cell, and includes a global ID, necessary sub-processor information, a sandbox size, and a previous software cell ID.

  The global ID can uniquely identify the software cell throughout the network, and is created based on the transmission source ID and the date and time (date and time) of creation or transmission of the software cell.

  In the necessary sub-processor information, the number of sub-processors necessary for executing the software cell is set. The sandbox size is set with the amount of memory in the main memory 26 and the LS 24 of the sub processor 23 necessary for executing the software cell.

  The previous software cell ID is an identifier of the previous software cell in a group of software cells that request sequential execution of streaming data or the like.

  The execution section of the software cell is composed of DMA commands, programs and data. The DMA command includes a series of DMA commands necessary for starting the program, and the program includes a sub processor program executed by the sub processor 23. The data here is data processed by a program including the sub processor program.

  Further, the DMA command includes a load command, a kick command, a function program execution command, a status request command, and a status return command.

  The load command is a command for loading information in the main memory 26 into the LS 24 in the sub processor 23, and includes a main memory address, a sub processor ID, and an LS address in addition to the load command itself. The main memory address indicates an address of a predetermined area in the main memory 26 from which information is loaded. The sub processor ID and the LS address indicate the identifier of the sub processor 23 to which information is loaded and the address of the LS 24.

  The kick command is a command for starting execution of the program, and includes a sub processor ID and a program counter in addition to the kick command itself. The sub processor ID identifies the sub processor 23 to be kicked, and the program counter gives an address for the program execution program counter.

  As will be described later, the function program execution command is a command for requesting execution of a function program from another information processing apparatus to another information processing apparatus. The information processing controller in the information processing apparatus that has received the function program execution command identifies a function program to be activated by a function program ID described later. Although the function program will be described later, it is a program belonging to the function program category in the software configuration diagram stored in the main memory of the information processing apparatus shown in FIG. The function program is loaded into the main memory and executed by the main processor.

  The status request command is a command for requesting transmission of device information related to the current operation state (situation) of the information processing device indicated by the transmission destination ID to the information processing device indicated by the response destination ID. Although the function program will be described later, it is a program categorized into the function program in the software configuration diagram stored in the main memory 26 of the information processing controller shown in FIG. The function program is loaded into the main memory 26 and executed by the main processor 21.

  The status reply command is a command in which the information processing apparatus that has received the status request command responds to the information processing apparatus indicated by the response destination ID included in the status request command with its own apparatus information. The status reply command stores device information in the data area of the execution section.

  FIG. 4 shows the structure of the data area of the software cell when the DMA command is a status return command.

  The information processing device ID is an identifier for identifying the information processing device including the information processing controller, and indicates the ID of the information processing device that transmits the status reply command. The information processing apparatus ID is included in the information processing controller in the information processing apparatus by the main processor 21 included in the information processing controller in the information processing apparatus when the power is turned on. It is generated based on the number of sub processors 23 to be processed.

  The information processing device type ID includes a value representing the characteristics of the information processing device. Features of the information processing apparatus include, for example, a hard disk recorder, a PDA (Personal Digital Assistant), a portable CD (Compact Disc) player, a PC (Personal Computer), and the like. The information processing device type ID may represent a function of the information processing device such as video / audio recording or video / audio reproduction. It is assumed that values representing the characteristics and functions of the information processing apparatus are determined in advance, and it is possible to grasp the characteristics and functions of the information processing apparatus by reading the information processing apparatus type ID.

  The MS (master / slave) status indicates whether the information processing apparatus is operating as a master apparatus or a slave apparatus, as will be described later. When this is set to 0, it operates as a master apparatus. If it is set to 1, it indicates that it is operating as a slave device.

  The main processor operating frequency represents the operating frequency of the main processor 21 in the information processing controller. The main processor usage rate represents the usage rate in the main processor 21 for all programs currently running on the main processor 21. The main processor usage rate is a value representing the ratio of the processing capacity in use to the total processing capacity of the target main processor. For example, the main processor usage rate is calculated by using MIPS as a unit for evaluating the processor processing capacity, or per unit time. Calculated based on processor usage time. The same applies to the sub-processor usage rate described later.

  The number of sub-processors represents the number of sub-processors 23 included in the information processing controller. The sub processor ID is an identifier for identifying each sub processor 23 in the information processing controller.

  The sub processor status represents the state of each sub processor 23, and there are states such as “unused”, “reserved”, and “busy”. “unused” indicates that the sub-processor is not currently used and is not reserved for use. “reserved” indicates a reserved state that is not currently used. Busy indicates that it is currently in use.

  The sub-processor usage rate represents the usage rate of the sub-processor for a program that is currently being executed by the sub-processor or that is reserved for execution by the sub-processor. That is, the sub processor usage rate indicates the current usage rate when the sub processor status is busy, and indicates the estimated usage rate that is to be used later when the sub processor status is reserved.

  One set of sub processor ID, sub processor status, and sub processor usage rate is set for one sub processor 23, and the number of sets corresponding to the sub processor 23 in one information processing controller is set.

  The main memory total capacity and the main memory usage amount represent the total capacity and the currently used capacity of the main memory 26 connected to the information processing controller, respectively.

  The number of external recording units represents the number of external recording units 28 connected to the information processing controller. The external recording unit ID is information that uniquely identifies the external recording unit 28 connected to the information processing controller. The external recording unit type ID represents the type of the external recording unit (for example, hard disk, CD ± RW, DVD ± RW, memory disk, SRAM, ROM, etc.).

  The external recording unit total capacity and the external recording unit usage amount represent the total capacity and the currently used capacity of the external recording unit 28 identified by the external recording unit ID, respectively.

  The external recording unit ID, the external recording unit type ID, the external recording unit total capacity, and the external recording unit usage amount are set as one set for one external recording unit 28 and connected to the information processing controller. The number of sets corresponding to the number of external recording units 28 is set. That is, when a plurality of external recording units are connected to one information processing controller, a different external recording unit ID is assigned to each external recording unit, the external recording unit type ID, the external recording unit total capacity, and the external recording unit Department usage is also managed separately.

  The area ID is a number for identifying the area where the information processing apparatus is located on the premise that the broadcast program of the broadcasting station differs depending on the area.

(Execute software cell)
The main processor 21 included in the information processing controller in a certain information processing device generates a software cell having the above configuration and transmits it to the other information processing device and the information processing controller in the device via the network 9. . The transmission source information processing device, the transmission destination information processing device, the response destination information processing device, and the information processing controller in each device are identified by the transmission source ID, the transmission destination ID, and the response destination ID, respectively. .

  The main processor 21 included in the information processing controller in the information processing apparatus that has received the software cell stores the software cell in the main memory 26. Furthermore, the transmission destination main processor 21 reads the software cell and processes the DMA command included therein.

  Specifically, the transmission destination main processor 21 first executes a load command. As a result, information is loaded from the main memory address instructed by the load command into a predetermined area of the LS 24 in the sub processor specified by the sub processor ID and LS address included in the load command. The information loaded here is a sub-processor program or data included in the received software cell, or other designated data.

  Next, the main processor 21 outputs the kick command together with the program counter included in the kick command to the sub processor indicated by the sub processor ID included therein.

  The instructed sub processor executes the sub processor program according to the kick command and the program counter. After the execution result is stored in the main memory 26, the main processor 21 is notified that the execution has been completed.

  Note that the processor that executes the software cell in the information processing controller in the information processing apparatus of the transmission destination is not limited to the sub-processor 23, but the main processor 21 executes a program for main memory such as a function program included in the software cell. It can also be specified to execute.

  In this case, the transmission source information processing apparatus includes a main memory program and data processed by the main memory program instead of the sub processor program, and the DMA command is sent to the transmission destination information processing apparatus. The software cell as a load command is transmitted, and the main memory 26 stores the main memory program and data processed thereby. Next, the transmission source information processing apparatus identifies the main processor ID, the main memory address, and the main memory program for the information processing controller in the transmission destination information processing apparatus for the transmission destination information processing apparatus. A software cell that includes an identifier such as a function program ID (to be described later) and a program counter and whose DMA command is a kick command or a function program execution command is transmitted to cause the main processor 21 to execute the main memory program.

  As described above, in the network system of the present invention, the transmission source information processing apparatus transmits the sub processor program or the main memory program to the transmission destination information processing apparatus by the software cell, and transmits the sub processor program to the transmission destination. It is possible to load the sub processor 23 included in the information processing controller in the information processing apparatus and cause the information processing apparatus of the transmission destination to execute the sub processor program or the main memory program.

  When the program included in the received software cell is a sub processor program, the information processing controller in the transmission destination information processing apparatus loads the sub processor program to the designated sub processor. Then, the sub processor program or the main memory program included in the software cell is executed.

  Therefore, even if the user does not operate the transmission destination information processing apparatus, the sub processor program or the main memory program can be automatically executed by the information processing controller in the transmission destination information processing apparatus.

  In this way, when the information processing controller in its own device does not have a main memory program such as a sub processor program or a function program, the information processing device can receive information from other information processing devices connected to the network. Can be obtained. Furthermore, data transfer is performed between each sub-processor by the DMA method, and the above-described sandbox is used, so that even when it is necessary to process data in multiple stages within one information processing controller, high speed and high security are achieved. The process can be executed.

[Distributed processing as a network system]
As a result of distributed processing using software cells, a plurality of information processing apparatuses 1, 2, 3, 4 connected to the network 9 as shown in the upper part of FIG. It operates as a single information processing device 7. However, for this purpose, the following processing needs to be executed by the following configuration.

(System software configuration and program loading)
FIG. 6 shows the configuration of software stored in the main memory 26 of each information processing controller. These software (programs) are recorded in the external recording unit 28 connected to the information processing controller before the information processing apparatus is turned on.

  Each program is categorized into a control program, a function program, and a device driver by function or feature.

  The control program is the same for each information processing controller, and is executed by the main processor 21 of each information processing controller, and includes an MS (master / slave) manager and a capability exchange program described later.

  The function program is executed by the main processor 21, and a function program corresponding to the information processing apparatus is provided for each information processing controller such as recording, reproduction, and material search.

  Device drivers are used for input / output (transmission / reception) of an information processing controller (information processing device), such as broadcast reception, monitor output, bit stream input / output, network input / output, etc. Provided.

  When the information processing apparatus is physically connected to the network 9 by plugging in a cable or the like, the main power supply is turned on and the information processing apparatus is electrically and functionally connected to the network 9. The main processor 21 of the information processing controller of the information processing apparatus loads each program belonging to the control program and each program belonging to the device driver into the main memory 26.

  As a loading procedure, the main processor 21 first reads a program from the external recording unit 28 by causing the DC 27 to execute a read command, and then causes the DMAC 25 to execute a write command to load the program into the main memory 26. Write to.

  As for each program belonging to the function program, it may be configured to load only the necessary program when necessary, or like the programs belonging to other categories, each program is loaded immediately after the main power is turned on. You may comprise as follows.

  Here, each program belonging to the function program does not need to be recorded in the external recording unit 28 of all information processing apparatuses connected to the network, and is recorded in the external recording unit 28 of any one information processing apparatus. If so, it can be loaded from another information processing apparatus by the above-described method. As a result, the function program is executed as one virtual information processing apparatus 7 as shown in the lower part of FIG. Can do.

  Here, as described above, the function program processed by the main processor 21 may operate in cooperation with the sub processor program processed by the sub processor 23. Therefore, when there is a sub processor program that operates in cooperation with the target function program when the main processor 21 reads the function program from the external recording unit 28 and writes it to the main memory 26, the sub processor program also includes the same main program. It is assumed that data is written in the memory 26. In this case, there may be one or more sub-processor programs that operate in cooperation with each other. If there are a plurality of sub-processor programs that operate in cooperation, all the sub-processor programs are written in the main memory 26. The sub processor program written in the main memory 26 is then written in the LS 24 in the sub processor 23 and operates in cooperation with the function program processed by the main processor 21.

  As shown in the software cell of FIG. 3, an identifier that can uniquely identify a program for each program is assigned to the function program as a function program ID. The function program ID is determined from the creation date and time, the information processing apparatus ID, and the like at the stage of creating the function program.

  A sub processor program ID is also assigned to the sub processor program, whereby the sub processor program can be uniquely identified. The assigned sub-processor program ID is an identifier related to the function program ID of the function program that is the partner of the cooperative operation, for example, the function program ID as a parent number and a branch number added at the end. There may be an identifier that is not related to the function program ID of the function program that is the partner of the cooperative operation. In any case, when the function program and the sub processor program operate in cooperation, it is necessary to store the program ID which is the identifier of the other party in the own program. Even when the function program operates in cooperation with a plurality of sub processor programs, the function program stores the sub processor program IDs of all the sub processor programs.

  The main processor 21 secures an area for storing device information (information regarding the operation state) of the information processing device on which the main processor 21 operates in the main memory 26, and records the information as a device information table of the own device. The device information here is each piece of information below the information processing device ID shown in FIG.

(Determination of master / slave in the system)
In the network system described above, when the main power supply to a certain information processing apparatus is turned on, the main processor 21 of the information processing controller of the information processing apparatus loads a master / slave manager (hereinafter referred to as MS manager) into the main memory 26 and executes it. To do.

  When the MS manager detects that the information processing apparatus on which it operates is connected to the network 9, it confirms the existence of another information processing apparatus connected to the same network 9. The “connection” or “existence” here means that the information processing apparatus is not only physically connected to the network 9 but also electrically and functionally connected to the network 9 as described above. Indicates.

  In addition, an information processing apparatus in which the device operates is referred to as a self device, and another information processing device is referred to as another device. The apparatus also indicates the information processing apparatus.

  A method in which the MS manager confirms the existence of another information processing apparatus connected to the same network 9 will be described below.

  The MS manager generates a software cell in which the DMA command is a status request command, the transmission source ID and the response destination ID are the information processing apparatus, and the transmission destination ID is not specified, and the network manager is connected to the information processing apparatus. To set a timer for network connection confirmation. The timeout time of the timer is, for example, 10 minutes.

  When another information processing apparatus is connected to the network system, the other apparatus receives the software cell of the status request command, and sends it to the information processing apparatus that has issued the status request command specified by the response destination ID. On the other hand, the DMA command is a status return command, and a software cell including device information of itself (other device) is transmitted as data. The software cell of this status reply command includes at least information for identifying the other device (information processing device ID, information on the main processor, information on the sub processor, etc.) and the MS status of the other device.

  The MS manager of the information processing apparatus that has issued the status request command monitors the reception of the software cell of the status reply command transmitted from another apparatus on the network until the timer for network connection confirmation times out. As a result, when the status reply command indicating the MS status = 0 (master device) is received, the MS status in the device information table of the own device is set to 1. Thus, the device becomes a slave device.

  On the other hand, if no status reply command is received before the network connection confirmation timer times out, or if no status reply command indicating MS status = 0 (master device) is received, The MS status in the device information table of the own device is set to 0. This makes the device a master device.

  That is, if no information processing apparatus is connected to the network 9 in a state where none of the apparatuses is connected to the network 9 or a master apparatus does not exist on the network 9, the apparatus automatically becomes the master apparatus. Set as On the other hand, when a new information processing apparatus is connected to the network 9 in a state where a master apparatus already exists on the network 9, the apparatus is automatically set as a slave apparatus.

  For both the master device and the slave device, the MS manager periodically monitors the status of the other device by sending a status request command to the other device on the network 9 and inquiring status information. As a result, the main power supply of the information processing apparatus connected to the network 9 is cut off or the information processing apparatus is disconnected from the network 9, so that the status from a specific other apparatus within a predetermined period set in advance for determination When there is a change in the connection state of the network 9, such as when a reply command is not returned or when a new information processing apparatus is connected to the network 9, the information is notified to the ability exchange program described later. .

(Acquisition of device information in master device and slave device)
When the main processor 21 receives an inquiry from another manager on the network 9 and a notification of completion of setting the MS status of the own apparatus from the MS manager, the main processor 21 executes the capability exchange program.

  When the own device is a master device, the capability exchange program acquires device information of all other devices connected to the network 9, that is, device information of each slave device.

  As described above, the device information of another device is generated by generating a software cell in which the DMA command is a status request command and transmitting it to the other device. Thereafter, the DMA command is a status return command and data of the other device. This is possible by receiving a software cell containing device information from another device.

  Similar to the device information table of the own device that is the master device, the capability exchange program sets an area for storing device information of all other devices (each slave device) connected to the network 9 as the main memory of the own device. This information is recorded in a device information table of another device (slave device).

  That is, the device information of all information processing devices connected to the network 9 including the device itself is recorded in the main memory 26 of the master device as a device information table.

  On the other hand, when the own device is a slave device, the capability exchange program obtains device information of all other devices connected to the network 9, that is, device information of each slave device other than the master device and the own device. The information processing device ID and the MS status included in the device information are recorded in the main memory 26 of the own device.

  That is, the device information of the own device is recorded as a device information table in the main memory 26 of the slave device, and the master device connected to the network 9 other than the own device and the information processing device ID for each slave device. And the MS status are recorded as another device information table.

  Further, in both the master device and the slave device, when the capability exchange program is notified from the MS manager that the information processing device is newly connected to the network 9, as described above, the device of the information processing device Information is acquired and recorded in the main memory 26 as described above.

  Note that the MS manager and the capability exchange program are not limited to being executed by the main processor 21, but may be executed by any of the sub processors 23. The MS manager and the capability exchange program are preferably resident programs that always operate while the main power supply of the information processing apparatus is turned on.

(When the information processing device is disconnected from the network)
For both the master device and the slave device, the capability exchange program causes the MS manager to cut off the main power supply of the information processing device connected to the network 9 or disconnect the information processing device from the network 9 as described above. When it is notified, the apparatus information table of the information processing apparatus is deleted from the main memory 26 of the own apparatus.

  Further, when the information processing apparatus disconnected from the network 9 is a master apparatus, a new master apparatus is determined by the following method.

  Specifically, for example, each of the information processing apparatuses that are not disconnected from the network 9 replaces the information processing apparatus ID of the own apparatus and the other apparatus with a numerical value, and sets the information processing apparatus ID of the own apparatus to the information processing apparatus of the other apparatus. If the information processing device ID of the own device is the smallest among the information processing devices that are not disconnected from the network 9 as compared with the ID, the slave device moves to the master device and sets the MS status to 0, As described above, device information of all other devices (each slave device) connected to the network 9 is acquired as a master device and recorded in the main memory 26.

(Distributed processing based on device information)
As shown in the lower part of FIG. 5, in order for a plurality of information processing devices 1, 2, 3, 4 connected to the network 9 to operate as a single virtual information processing device 7, the master device is a user. It is necessary to understand the operation of the slave device and the operating state of the slave device.

  FIG. 7 shows a state in which four information processing apparatuses operate as one virtual information processing apparatus 7. It is assumed that the information processing device 1 is operating as a master device, and the information processing devices 2, 3, and 4 are operating as slave devices A, B, and C.

  When the user operates an information processing device connected to the network 9, if the operation target is the master device 1, the operation information is directly grasped by the master device 1, and if the operation target is a slave device, The operation information is transmitted from the operated slave device to the master device 1. That is, regardless of whether the user's operation target is the master device 1 or the slave device, the operation information is always grasped by the master device 1. The operation information is transmitted, for example, by a software cell whose DMA command is an operation information transmission command.

  Then, the main processor 21-1 included in the information processing controller 11 in the master device 1 selects a function program to be executed according to the operation information. At that time, if necessary, the main processor 21-1 included in the information processing controller 11 in the master device 1 may transfer the main memory 26-1 from the external recording units 28-1 and 28-2 of the own device by the above method. However, another information processing device (slave device) may transmit the function program to the master device 1.

  In the function program, information processing device type IDs represented as information shown in FIG. 4, main processor or sub-processor processing capacity, main memory usage, and conditions related to the external recording unit are required for each execution unit. The required specifications regarding the device are defined.

  The main processor 21-1 included in the information processing controller 11 in the master device 1 reads out the required specifications necessary for each function program. Also, the device information table of each information processing device is read by referring to the device information table recorded in the main memory 26-1 by the capability exchange program in advance. The device information here indicates each piece of information below the information processing device ID shown in FIG. 4, and is information relating to the main processor, sub processor, main memory, and external recording unit.

  The main processor 21-1 included in the information processing controller 11 in the master device 1 sequentially compares the device information of each information processing device connected on the network 9 with the required specifications necessary for executing the function program. To do.

  For example, when the function program requires a recording function, only the information processing apparatus having the recording function is specified and extracted based on the information processing apparatus type ID. Furthermore, a slave device that can secure the conditions regarding the processing capability of the main processor or sub processor, the amount of main memory used, and the external recording unit necessary for executing the function program is specified as an execution request candidate device. Here, when a plurality of execution request candidate devices are specified, one execution request candidate device is specified and selected from the candidate devices.

  When the slave device to be executed is specified, the main processor 21-1 included in the information processing controller 11 in the master device 1 sets the main memory included in the information processing controller 11 in the own device for the specified slave device. The device information table of the slave device recorded in 26-1 is updated.

  Furthermore, the main processor 21-1 included in the information processing controller 11 in the master device 1 generates a software cell whose DMA command is a function program execution command, and the cell interface of the software cell needs a function program related to the function program. The sub-processor information and the sandbox size (see FIG. 3) are set and transmitted to the slave device requested to execute.

  The slave device requested to execute the function program executes the function program and updates the device information table of the own device. At that time, if necessary, the main processor 21 included in the information processing controller in the slave device loads the function program from the external recording unit 28 of the own device to the main memory 26 by the above method.

  If the required function program is not recorded in the external recording unit 28 of the slave device that is requested to execute the function program, the other information processing apparatus uses the function program as the main memory program. The system may be configured to transmit to the function program execution request destination slave device.

  Further, as with the main memory program, if necessary, the sub processor program is also transmitted to another information processing device by a software cell and loaded into the sub processor 23 of the other information processing device. The device can be executed.

  After the execution of the function program, the main processor 21 included in the information processing controller in the slave device that has executed the function program transmits an end notification to the main processor 21-1 included in the information processing controller 11 in the master device 1. At the same time, the device information table of the own device is updated. The main processor 21-1 included in the information processing controller 11 in the master device 1 receives the end notification and updates the device information table of the slave device that has executed the function program.

  The main processor 21-1 included in the information processing controller 11 in the master device 1 identifies itself as an information processing device that can execute the function program from the reference result of the device information table of the own device and the other device. There is also a case of selecting. In that case, the master device 1 executes the function program.

  In the example of FIG. 7, the case where the user operates the slave device A (information processing device 2) and another slave device B (information processing device 3) executes a function program corresponding to the operation will be described with reference to FIG. An example of distributed processing is shown.

  In the example of FIG. 8, when the user operates the slave device A, the distributed processing of the entire network system including the slave device A starts. First, in step 41, the slave device A transmits the operation information to the master device. 1 to send.

  In step 72, the master device 1 receives the operation information, and further proceeds to step 73, where each information processing is performed from the device information table of the own device and other devices recorded in the main memory 26-1 of the own device. The operating state of the apparatus is checked, and an information processing apparatus that can execute a function program corresponding to the received operation information is selected. This example is a case where the slave device B is selected.

  Next, in step 74, the master device 1 requests the selected slave device B to execute the function program.

  In step 95, the slave device B receives the execution request, and further proceeds to step 96 to execute the function program requested to be executed.

  As described above, by operating only one information processing apparatus, the user operates a plurality of information processing apparatuses 1, 2, 3, and 4 without operating other information processing apparatuses. The information processing apparatus 7 can be operated.

[Method for extending the functions of information processing devices]
Next, a method for extending the functions of the information processing apparatus connected to the network system will be described.

  Here, the function extended to the information processing apparatus is a function realized by software or hardware originally installed in the information processing apparatus, but only after another specific information processing apparatus is connected to the network 9. It becomes available (active). More specifically, for example, there is a function for displaying an instruction manual for explaining how to handle a device in an environment where a plurality of devices are connected, and a function for improving the image quality and sound quality of an AV device. . Also, in this case, a method of expanding the function by activating the function implemented in one information processing apparatus, and hardware or software parts necessary to realize one function in a plurality of information processing apparatuses Are distributed, and when these multiple information processing devices are connected to the network 9, there is a method of expanding the function by activating one function by cooperation of each part. .

  First, a method for expanding a function by activating a function installed in one information processing apparatus will be described.

  FIG. 9 is a block diagram showing a configuration of a network system 100 employing this method.

  The figure shows a first information processing apparatus 40 in which extended functions A and B that become active only when another specific information processing apparatus is connected to the network 9 are mounted as information processing apparatuses connectable to the network 9; The case where there exists the 2nd information processing apparatus 50 which possesses the function active key which activates the at least one part extended function (extended function A) of this 1st information processing apparatus 40 is shown.

  The second information processing apparatus 50 includes a key storage unit 51 in which the function active key is stored in advance, an encryption key generation unit 52 that is a means for encrypting the function active key in the key storage unit 51, and an encryption key generation unit. And an encryption key transmission unit 53 that is a means for periodically transmitting the encryption key generated by 52 to a predetermined information processing apparatus (first information processing apparatus 40) periodically through the network 9. Here, the function active key stored in the key storage unit 51 is used to activate the corresponding extended function (for example, the extended function A) of the extended functions A and B installed in the first information processing apparatus 40. Key.

  The first information processing device 40 includes an encryption key receiving unit 41 that is means for receiving an encryption key periodically transmitted from another information processing device through the network 9, and an encryption key received by the encryption key receiving unit 41. The encryption key decrypting unit 42 for decrypting, the key authenticating unit 43 for authenticating the key decrypted by the encryption key decrypting unit 42, and the active and inactive of the extended functions A and B based on the authentication result of the key authenticating unit 43 And a function control unit 44 for switching between. Here, the extended function A is a function activated by a function active key transmitted from the second information processing apparatus 50, and the extended function B is activated by a function active key transmitted from another information processing apparatus (not shown). It is a function.

  The encryption key decrypting unit 42 decrypts the encryption key periodically received by the encryption key receiving unit 41 and passes it to the key authenticating unit 43. The key authenticating unit 43 describes the decryption result of the received key. It is determined whether the function active key is correct and the determination result is passed to the function control unit 44. The function control unit 44 evaluates the temporal continuity of the notification that the reception key is the function active key from the key authentication unit 43, and activates the extended function (for example, A) corresponding to the reception key. Decide whether to make it inactive. In other words, the reception key is activated by the key authenticating unit 43 at a cycle substantially coincident with the cycle in which the encryption key is transmitted from the second information processing device 50 while the second information processing device 50 is connected to the network 9. While receiving the notification of the key, the function control unit 44 controls to activate the extended function (for example, A) corresponding to the reception key. When the notification interval from the key authenticating unit 43 that the reception key is a function active key exceeds a certain value, or when a notification that the reception key is not a function active key is received, the extension Switch function (eg A) to inactive.

  Next, an operation of switching active / inactive of the extended function A of the first information processing apparatus 40 by connecting the second information processing apparatus 40 to the network 9 will be described.

  FIG. 10 is a flowchart showing an operation procedure when the second information processing apparatus 50 is connected to the network 9.

  When it is detected that the second information processing apparatus 50 is connected to the network 9 (step 101), the main processor of the second information processing apparatus 50 reads the function active key from the key storage unit 51 and generates an encryption key. The unit 52 encrypts the function active key (step 102). Subsequently, the main processor periodically transmits the encryption key generated by the encryption key generation unit 52 to a predetermined information processing device (first information processing device 40) through the network 9, for example, at a predetermined time interval (several seconds). , At intervals of several tens of seconds) (step 103). While the second information processing apparatus 50 is connected to the network 9, the encryption key is continuously transmitted.

  For transmission of this encryption key, as shown in FIG. 11, a software cell as an encryption key transmission command including this encryption key is transmitted. The software cell as the encryption key transmission command includes a transmission destination information processing apparatus ID, a transmission source information processing apparatus ID, an information processing apparatus ID, an encryption key transmission command as a DMA command, a program (subprogram), and data. Encryption key and encryption key transmission interval.

  FIG. 12 is a flowchart showing an operation in the first information processing apparatus 40 for processing the encryption key transmitted from the second information processing apparatus 50 to switch the extended function A between active and inactive.

  When the main processor of the first information processing device 40 receives the encryption key transmitted from the other information processing device via the network 9 by the encryption key receiving unit 41 (step 122), the encryption key decrypting unit 42 receives the received encryption key. The key is decrypted (step 123), the decrypted key is authenticated by the key authenticating unit 43 (step 124), and the authentication result is notified to the function control unit 44. When the key authentication unit 43 determines that the decrypted key is a function active key installed in the first information processing apparatus 40 for activating any of the extended functions A and B (YES in step 125), the function control unit 44 activates the extended function corresponding to the function active key (step 126). Since the function active key transmitted from the second information processing apparatus 50 is a function active key for activating the extended function A installed in the first information processing apparatus 40, the extended function A becomes active. .

  Thereafter, the main processor of the first information processing apparatus 40 resets the timer (step 127). At that time, a timer value is calculated based on the encryption key transmission interval included in the software cell transmitted as the transmission encryption key transmission command from the second information processing apparatus 50, and the reset is performed after setting this to the timer. . For example, a time obtained by adding a certain margin to the encryption key transmission interval is calculated as a timer value.

  Before the timer expires (NO in step 121), the next encryption key is received by the encryption key receiving unit 41, and the key authentication unit 43 determines that the function active key is for activating the extended function A. The function control unit 44 keeps the extended function A active as it is, and if the function active key for activating the extended function A is not received before the timer expires (Step S44). 121), the extended function A is switched to inactive (step 128).

  As a result, the extended function A is activated only during the period in which the function active key is received, and the risk that the extended function is illegally used can be reduced. Even if the function active key is leaked, the extended function is not illegally used unless the function active key can be transmitted periodically.

  Next, when hardware or software parts necessary for realizing one function are distributed and arranged in a plurality of information processing apparatuses, and when the plurality of information processing apparatuses are connected to the network 9, A method of expanding the function by activating one function in cooperation with each part will be explained.

  FIG. 13 is a block diagram showing a configuration of a network system 100 employing this method.

  This figure shows an example in which hardware or software parts necessary for realizing one function are distributed and arranged in the two information processing apparatuses 60 and 70.

  Each of the information processing apparatuses 60 and 70 includes key storage units 61 and 71 in which function active keys are stored in advance, and encryption key generation units 62 and 72 that are means for encrypting the function active keys in the key storage units 61 and 71. And encryption key transmitters 63 and 73, which are means for periodically transmitting the encryption key generated by the encryption key generators 62 and 72 to another predetermined information processing apparatus through the network 9. . Here, the function active key stored in the key storage unit 61 of the first information processing apparatus 60 is a key for activating the extended function part A2 mounted on the second information processing apparatus 70, and the second information The function active key stored in the key storage unit 71 of the processing device 70 is a key for activating the extended function part A1 mounted on the first information processing device 60.

  Each of the information processing devices 60 and 70 includes encryption key receiving units 64 and 74 that are means for receiving an encryption key periodically transmitted from other information processing devices through the network 9, and an encryption key receiving unit 64, The encryption key decryption units 65 and 75 for decrypting the encryption key received at 74, the key authentication units 66 and 76 for authenticating the keys decrypted by the encryption key decryption units 65 and 75, and the key authentication units 66 and 76 Function control units 67 and 77 for switching between active and inactive of the extended function parts A1 and A2 based on the authentication result.

  The encryption key decryption units 65 and 75 decrypt the encryption key periodically received by the encryption key reception units 64 and 74 and pass them to the key authentication units 66 and 76. The key authentication units 66 and 76 are delivered. The key decryption result is determined whether it is a correct function active key, and the determination result is passed to the function control units 67 and 77. The function control units 67 and 77 evaluate the temporal continuity of the notification that the reception key is the function active key from the key authentication units 66 and 76, and add the extended function parts A1 and A2 corresponding to the reception key. Decide whether to make it active or inactive. That is, the reception keys function from the key authenticating units 66 and 76 at a cycle that approximately matches the cycle at which the encryption keys are transmitted from other information processing devices while the information processing devices 60 and 70 are connected to the network 9. While receiving the notification of the active key, the function control units 67 and 77 perform control so that the extended function parts A1 and A2 corresponding to the reception key are activated. When the notification interval from the key authentication units 66 and 76 that the received key is a function active key exceeds a certain value, or when the notification that the received key is not a correct function active key is received The extension function parts A1 and A2 are switched to inactive.

  Next, an operation for switching between active / inactive of the extended function parts A1 and A2 of the information processing apparatuses 60 and 70 will be described.

  FIG. 14 is a flowchart showing an operation procedure when the information processing apparatuses 60 and 70 are connected to the network 9. As a representative example, an operation when the first information processing apparatus 60 is connected will be described.

  When it is detected that the first information processing device 60 is connected to the network 9 (step 141), the main processor of the first information processing device 60 obtains an active key for the extended function part A2 from the key storage unit 61. The encryption key generation unit 62 reads out and encrypts the active key (step 142). Subsequently, the main processor periodically transmits the encryption key generated by the encryption key generation unit 62 to a predetermined information processing device (second information processing device 70) through the network 9, for example, at a predetermined time interval (several seconds). , Continuously transmitted at intervals of several tens of seconds (step 143). While the first information processing apparatus 60 is connected to the network 9, the active key for the extended function part A2 is continuously transmitted.

  FIG. 15 is a flowchart showing an operation in the second information processing apparatus 70 for switching between active and inactive of the extended function part A2 by processing the encryption key transmitted from the first information processing apparatus 60.

  When the main processor of the second information processing device 70 receives the encryption key transmitted from the other information processing device through the network 9 by the encryption key receiving unit 74 (step 152), the encryption key decrypting unit 75 receives the received encryption key. The key is decrypted (step 153), the decrypted key is authenticated by the key authenticating unit 76 (step 154), and the authentication result is notified to the function control unit 77. Here, when the key authentication unit 76 determines that the decrypted key is an active key for activating the extended function part A2 mounted on the second information processing apparatus 70 (YES in step 155). The function control unit 77 switches the extended function part A2 to active (step 156).

  Thereafter, the main processor of the second information processing device 70 resets the timer (step 157). At that time, a timer value is calculated based on the encryption key transmission interval included in the software cell transmitted as the transmission encryption key transmission command from the first information processing apparatus 60, and the timer value is set in the timer and then reset is performed. . For example, a time obtained by adding a certain margin to the encryption key transmission interval is calculated as a timer value.

  Before the timer expires (NO in step 151), the next encryption key is received by the encryption key receiving unit 74, and the key authentication unit 76 determines that the key is an active key for activating the extended function part A2. The function control unit 77 keeps the extended function part A2 active as it is, and if the active key for activating the extended function part A2 is not received before the timer expires ( In step 151, the extended function part A2 is switched to inactive (step 158). As a result, the extended function part A2 is activated only during a period in which the active key is received.

  On the other hand, as with the operation of the first information processing apparatus 60 shown in FIG. 14, the second information processing apparatus 70 also encrypts the active key for the extended function part A1 while connected to the network 9. Keep sending regularly. The first information processing device 60 is for the encrypted extended function part A1 periodically transmitted from the second information processing device 70, similarly to the operation of the second information processing device 70 shown in FIG. The active key is received, decrypted and authenticated, and if it is determined that it is an active key for the extended function part A1, the extended function part A1 is switched to active. In this way, the extended function part A1 is activated only during a period in which the active key for the extended function part A1 is received from the second information processing apparatus 70.

  As a result, during the period in which the information processing devices 60 and 70 are both connected to the network 9, both the extended function part A1 of the first information processing device 60 and the extended function part A2 of the second information processing device 70 are present. It becomes active, and the functions can be executed in the information processing apparatuses 60 and 70 by the cooperation of the extended function parts A1 and A2. Therefore, it is possible to reduce the risk of unauthorized use of the extended function parts A1 and A2 mounted on the information processing apparatuses 60 and 70. Further, even if the active keys for the extended function parts A1 and A2 are leaked, the extended function parts A1 and A2 are not illegally used unless the active keys can be transmitted to each other periodically. .

  It should be noted that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention.

It is a figure which shows an example of the network system of this invention. It is a figure with which it uses for description of the information processing controller with which the information processing apparatus of this invention is provided. It is a figure which shows an example of a software cell. It is a figure which shows the data area of a software cell when a DMA command is a status reply command. It is a figure which shows a mode that a some information processing apparatus operate | moves as one virtual information processing apparatus. It is a figure which shows an example of the software configuration of an information processing controller. It is a figure which shows a mode that four information processing apparatuses operate | move as one virtual information processing apparatus. It is a figure which shows the example of the distributed process in the system of FIG. It is a block diagram which shows the structure of the network system which can expand the function of information processing apparatus. 10 is a flowchart showing a procedure of an operation when the second information processing apparatus of FIG. 9 is connected to a network. It is a figure which shows the structure of the software cell containing an encryption key. FIG. 10 is a flowchart showing an operation of processing an encryption key received in the first information processing apparatus of FIG. 9 to switch between active and inactive extended functions. FIG. It is a block diagram which shows the structure of another network system which can expand the function of information processing apparatus. It is a flowchart which shows the procedure of operation | movement when the 1st information processing apparatus of FIG. 13 is connected to the network. 14 is a flowchart illustrating an operation of processing an encryption key received in the second information processing apparatus of FIG. 13 to switch active function parts between inactive and inactive.

Explanation of symbols

DESCRIPTION OF SYMBOLS 9 Network 40 1st information processing apparatus 41 Encryption key receiving part 42 Encryption key decoding part 43 Key authentication part 44 Function control part 50 2nd information processing apparatus 51 Key memory | storage part 52 Encryption key generation part 53 Encryption key transmission part 60 1st 1 Information processing device 61, 71 Key storage unit 62, 72 Encryption key generation unit 63, 73 Encryption key transmission unit 64, 74 Encryption key reception unit 65, 75 Encryption key decryption unit 66, 76 Key authentication unit 67, 77 Function control Part 70 Second information processing apparatus A, B Extended function A1, A2 Extended function parts

Claims (12)

An information processing apparatus connectable to a network,
Key receiving means for receiving key information periodically transmitted from another information processing apparatus connected to the network;
Key authentication means for authenticating the key information received by the key receiving means;
An information processing apparatus comprising: a function control unit that enables use of a predetermined function during a period in which authentication success is determined by the key authentication unit.   The information processing apparatus according to claim 1, wherein the predetermined function is a function that is implemented in advance by hardware, software, or both, and cannot be used by default.   The information processing apparatus according to claim 2, wherein the predetermined function is a function that can be used by cooperating with a predetermined function installed in the other information processing apparatus. An information processing apparatus connectable to a network,
Key generation means for generating key information for enabling use of a predetermined function implemented in another information processing apparatus connected to the network;
An information processing apparatus comprising: key transmission means for periodically transmitting key information generated by the key generation means.   The information processing apparatus according to claim 4, wherein the predetermined function is a function that is implemented in advance by hardware, software, or both, and is unavailable by default.   The information processing apparatus according to claim 5, wherein the predetermined function is a function that can be used by cooperating with a predetermined function installed in the other information processing apparatus. A network system including a network and a plurality of information processing devices connectable to the network,
One of the information processing apparatuses is
Key generation means for generating key information for enabling use of a predetermined function implemented in the other information processing apparatus connected to the network;
Key transmission means for periodically transmitting the key information generated by the key generation means to the other information processing apparatus,
The other information processing apparatus is
Key receiving means for receiving key information periodically transmitted from the one information processing apparatus connected to the network;
Key authentication means for authenticating the key information received by the key receiving means;
And a function control unit that enables a predetermined function to be used during a period in which authentication success is determined by the key authentication unit.   The network system according to claim 7, wherein the predetermined function is a function that is implemented in advance by hardware, software, or both, and is unavailable by default.   The network system according to claim 8, wherein the predetermined function is a function that can be used by cooperating with a predetermined function installed in the other information processing apparatus. The key receiving means receives key information periodically transmitted from another information processing apparatus connected to the network,
The key authentication means authenticates the key information received by the key receiving means,
A function expansion method for an information processing apparatus, wherein the function control means enables a predetermined function to be used during a period in which authentication success is determined by the key authentication means.   11. The function expansion method for an information processing apparatus according to claim 10, wherein the predetermined function is a function that is previously implemented by hardware, software, or both, and cannot be used by default.   11. The function expansion method for an information processing apparatus according to claim 10, wherein the predetermined function is a function that can be used by cooperating with a predetermined function installed in the other information processing apparatus. .

Images