JP2002169739A - Download system - Google Patents

Abstract

(57) [Problem] To provide a download system in which a meaningless download process in which a program that cannot be executed in a receiving device is transmitted to a receiving device is not performed. SOLUTION: In a download system 1 in which a program is downloaded from a transmission source device to a reception side device, a request source reception side device 20 receives a program download request and a resource usage status on the reception side device 20 at that time. Is transmitted to the transmission source device 10, and the transmission source device 10 receives the received reception side device information and the used resource information 700 (information indicating resources required for storage and execution for each program) held in advance. It is determined whether the requested program is executable on the current receiving device 20 based on the above. The program is downloaded to the receiving device 20 only when it is determined that the requested program is executable.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for transmitting data from a source device to a receiving device by using wireless or wired communication.
The present invention relates to a download system for downloading a program.

2. Description of the Related Art In recent years, a download system in which a program is downloaded from a transmission source device in response to a request from a reception side device between a transmission source device capable of wireless or wired communication and a reception side device. Is being provided. Specific examples include a program for applying for purchase of online shopping and a program for making a program reservation in accordance with a program table of a broadcast program from a server to a terminal (such as a set-top box) near the user. And a self-diagnosis program that downloads a self-diagnosis program from a monitoring center to a device to be monitored in a device remote monitoring system.

[0002] A transmission source device previously holds static information (memory capacity, standards, etc.) of a receiving device, and when downloading a program, checks the static information and checks the program. After determining that there is no problem in storing and executing the file, the program is transmitted.

[0003]

However, the program operating environment in the receiving apparatus such as whether there is a program storage area necessary for receiving and storing a program or whether there is sufficient OS resources depends on the situation at each time. It changes dynamically. For example, if another program is being executed at the time of the download request, the area where the program is stored and the resources used to execute the program are used to store and execute the program newly requested for download. Is not available. In addition, the user who instructs the download request does not give the instruction after grasping the usage status of the storage area, the OS resources, and the like. Therefore, a download request for a new program is issued from the situation where the storage and the execution cannot be performed. That could be enough.

[0004] Therefore, although the download process has been started, the receiving device has no free storage area for storing the program, so the download has to be terminated. The required resources are insufficient and the receiving device cannot execute the downloaded program, or the execution of the downloaded program may result in a system runaway. Performing the program download process in a situation where the receiving side device cannot store and execute the program is inconvenient from the viewpoint of service to the user, and wastes time and communication cost required for the download. There is also a problem.

[0005] In view of the above problems, it is an object of the present invention to provide a download system that does not perform meaningless download processing in a situation in which a receiving device cannot store and execute a new download program.

[0006]

In order to achieve the above object, a download system according to the present invention comprises a receiving device for receiving and executing a program, and a transmitting device for transmitting the program to the receiving device. A download system, wherein the receiving device includes information generating means for generating receiving device information indicating a use state of a program execution resource of the receiving device, identification information indicating a program to be downloaded, and the information. Request transmission means for transmitting a download request including the reception-side device information generated by the generation means to the transmission source device, and program reception means for receiving a program transmitted by the transmission source device in response to the download request The transmission source device has a program that holds one or more programs in association with identification information. Holding means, resource information holding means for holding required resource information indicating resources required for execution for each of the one or more programs, and request receiving means for receiving the download request transmitted from the receiving side device; From the required resource information on the program indicated by the identification information included in the download request received by the request reception unit and the receiving-side device information included in the download request, the program indicated by the identification information included in the download request is Determining means for determining whether the receiving device can be executed, and program transmitting means for transmitting to the receiving device a program determined to be executable by the receiving device, It is characterized by.

In such a download system, the source device determines whether or not the program desired by the receiving device to be downloaded can be executed by the receiving device prior to downloading the program, so that the unexecutable program is downloaded. No meaningless processing is performed.

[0008]

Embodiments of a download system according to the present invention will be described below with reference to the drawings. Embodiment 1 FIG. 1 is a block diagram illustrating a configuration of a download system 1 according to the present embodiment. The download system 1 includes one transmission source device 10
And a plurality of receiving-side devices 20 (only one is shown for convenience of drawing)
Are connected by a line network N in such a manner that bidirectional communication is possible, and a program is downloaded from the transmission source device 10 to the reception device 20 in response to a request from the reception device 20. Specifically, the transmission source device 10 is a broadcasting station of a cable television (CATV), and the reception-side device 20 is a set-top box placed in a user's home and connected to a television receiver. The downloaded program is a program provided by a broadcasting station to realize services such as program viewing and scheduled recording, such as an EPG (Electronic Program Guide).

In order for the receiving device 20 to execute the download program, it is assumed that a storage area for storing the program can be secured, and that resources required for executing the program can be secured. (Outline of Download Process) First, a process of executing a program download process and an outline of various requests and information transmitted and received between the transmission source device 10 and the reception side device 20 in the process will be described.

FIG. 2 is a sequence diagram showing a procedure of a download process and a flow of information accompanying the download process. First,
The receiving device 20 receives an instruction from the user to issue a download request for a certain program (). Then, the receiving-side device 20 has information on its own program execution environment (a free area for storing a new program, the use status of resources that can be used for program execution) at that time (“receiving-side device information”). ) To generate (). Then, the transmission source device 1 sends a download request to which the identification information of the program to be acquired is added.
Send to 0 ().

When receiving a download request from the receiving side device 20, the transmission source device 10 reads a program corresponding to the program identification information included in the request and information accompanying the program from a plurality of stored download programs. (). The “accompanying information” is information on resources necessary for executing the program (“resource used information”). The transmission source device 10 refers to the used resource information and the reception side device information received from the reception side device 20 and determines whether the program can be executed on the reception side device 20 (whether there is sufficient resource available to execute the program). Judgment) (). If it is determined that the program can be executed, the transmission source apparatus 10 transmits information necessary for executing the program (“program information” indicating which resources are allocated to the program, and “system information” indicating the contents of a system request at the time of executing the program. Request information "), and transmits the program together with the request information to the receiving side device 20 ().

Then, the receiving device 20 stores the received program, secures resources according to the contents of the program information, issues a necessary system request, and executes the program (). If it is determined that the program is not executable in the determination process, the transmission source device 10 sends a “download not possible” message to the receiving device 20, and the receiving device 20 notifies the user of the program being executed. Encourage them to end (make room for resources) and then request again. (Configuration) Next, the configuration of the download system 1 that executes the above download processing will be described with reference to FIG.
The receiving side device 20 and the transmitting source device 10 will be described separately. (Configuration of Reception-Side Device 20) The reception-side device 20 includes, as components related to download processing, an interface unit 21 for realizing an interface with a user, a reception-side device information generation unit 22 for generating reception-side device information, a download request Transmitting unit 23 for transmitting the program to the transmission source device 10, the program receiving unit 2 for receiving the downloaded program
4. It has a resource acquisition unit 25 for securing resources for program execution, a system request issuing unit 26 for issuing a request to the system for program execution, and a storage unit 27 for holding various information.

When the interface unit 21 receives a program download request from a user via input means (not shown) such as a keyboard, the interface unit 21 passes the program identification information to the request transmission unit 23 and And instructs the receiving-side apparatus information generation unit 22 to generate resource information. Further, the interface unit 21 generates a message for transmitting the result of the program download process to the user, and displays the message on a display device (not shown).

The receiving-side apparatus information generating section 22 is started up in response to an instruction from the interface section 21, and at that time, the storage section 2 is activated.
7 generates the receiving-side device information based on the contents of the resource management table 300 and the storage area management table 400 stored in the storage device 7, and outputs the information to the request transmission unit 23. The resource management table 300 stores information for managing the status of use of the program execution resources.
Stores information for managing the use state of the storage area for the download program.

FIG. 3 shows a resource management table 300 and an example of resource management information stored therein. In the resource management table 300, resource management information 301 to 305, which are information for management with respect to each of various resources (task resources and memory pool resources) that can be used by the receiving device 20 for executing the download program, are provided. Is stored.

The resource management information 301 to 305 includes a "resource type section 310" indicating the type of resource, a "resource ID section 320" which is unique identification information added to each resource, and whether or not the resource is in use. The "usage state unit 330" indicates the size of the area occupied by the resource. The content of the resource type section 310 is of two types: “task” indicating “task resource” and “mempool” indicating “memory pool resource”. The “task resource” is an area used by the OS for managing a task executed in the program, and specifically stores task management information (TCB: Task Control Block). In executing one program, a plurality of tasks may be executed in parallel, but the number of tasks that can be executed simultaneously is limited by the number of task resources. For example, in an environment where only two task resources can be used, a program in which three or more tasks run in parallel cannot be executed. On the other hand, the “memory pool resource” is an area in which information used by the OS to manage a working memory used for executing a program is stored.

The resource ID section 320 is resource identification information. It is set to be a unique value for each resource type. The content of the use state section 330 is "USED" indicating that the content is already used for execution of some download program and cannot be used. "UNUSED" to indicate that it can be used.

According to the contents of the resource management table 300 in FIG. 3, the receiving device 20 has three task resources and two memory pool resources, one of which is a task resource (resource ID: 1). ) And one memory pool resource (resource ID: 1) are in use. FIG. 4 is a diagram showing a configuration of the storage area management table 400 and an example of storage area information stored therein.

Each of the storage area information 401 to 403 is
Area ID section 41 which is identification information added to the storage area
0, the starting address part 42 indicating the memory address of the storage area
0, a use state part 430 indicating the use state of the storage area (USED: in use / UNUSED: unused, that is, whether or not there is a download program already stored), a reservation area part 440 indicating the size of the storage area, It comprises a program ID section 450 which is identification information of a download program stored in the storage area.

It can be seen from the contents of the storage area management table 400 shown in FIG. 4 that the receiving apparatus 20 has three storage areas, and among these, the program storage area whose area ID is "0" is called "W". This means that a download program having identification information is stored. In light of the contents of the resource management table 300 in FIG.
It can be seen that this program W is being executed using one task resource and one memory pool resource.

The request transmitting section 23 is provided with an interface section 21
Is activated in response to an instruction from
Waits for the receiving-side device information to be output from the device, and identifies the program received from the interface unit 21;
The source device 1 sends a program download request including the receiving device information received from the receiving device information generating unit 22.
Send to 0. Note that the request transmitting unit 23 adds the hardware serial number (identification information of the request source) of the receiving device 20 held in advance to the download request.

FIG. 5 shows that the request transmitting unit 23 transmits the
FIG. 4 is a diagram showing an example of the configuration and contents of a download request 500 sent to the server 0; The download request 500 includes identification information 510 of a program to which the download request is applied,
A hardware serial number 520, which is identification information of the receiving side device 20 of the request source, and a resource management table 300
The receiving side device information 53 combining the resource management information section 531 which is the content of the storage area management table 400 (see FIG. 4) and the storage area information section 532 which is the content of the storage area management table 400 (see FIG. 4).
Consists of zero.

The program receiving unit 24 includes a request transmitting unit 23
Receives a program transmitted from the transmission source device 10 in response to the request transmitted by the user, temporarily stores the program in a built-in memory (not shown), and stores program information (program resources) transmitted with the program. The information required for securing, which will be described in detail later, is output to the resource acquisition unit 25, and the system request information (information relating to the system request necessary for starting the execution of the program, details will be described later) is output to the system request issuing unit 26, respectively. And the resource acquisition unit 25
Wait for the notification that the acquisition of resources has been completed from
The program receiving unit 24 stores the temporarily stored program in a program storage area in the storage unit 27.

When the program receiving section 24 receives the notification of "download not possible" from the transmission source apparatus 10, it instructs the interface section 21 to display a message corresponding thereto. The resource acquisition unit 25 secures a storage area for a program to be downloaded and resources required for execution according to the contents of the program information received from the program reception unit 24. Specifically, the content of the resource management table 300 for managing the usage status of the resource is updated to specify the usage of the resource (the content of the usage status section 330 of the resource management information regarding the resource to be used is set to “UNUSE
("D" to "USED"), and to declare the use of the area for storing the program, change the contents of the usage status section 430 of the storage area information related to the storage area from "UNUSED" to "USED". I do.

The system request issuing unit 26 issues a system request in accordance with the contents of the system request information received from the program receiving unit 24, and generates a control request for restarting the system, executing a download program, and the like. The storage unit 27 stores the downloaded program, and stores the above-described resource management table 300,
The storage area management table 400 is stored. (Configuration of source device 10) The source device 10 includes a storage unit 16 in which various download programs and related information are stored in advance, a request receiving unit 11 for receiving a download request, and a search for searching for the requested program. Part 1
2. A determination unit 13 that determines whether the program can be downloaded (whether the request source device can execute the program), a rewriting unit 14 that rewrites a part of the program for execution by the reception device 20, a program Is transmitted.

First, various information stored in the storage unit 16 will be described. The storage unit 16 stores a program and its related information, and also stores a program management table 600 that manages these storage locations so that they can be read out promptly in response to a download request. FIG. 6 shows a program management table 600.
FIG. 3 is a diagram showing an example of the configuration and contents of the above. The program management table 600 stores program management information relating to each of the programs stored in the storage unit 16. The program management information includes a program ID section 601 as identification information of the program itself, a program address section 602 indicating a storage location in the storage section 16, a used resource information address section 603 indicating a storage location of related information of the program, and a system. It comprises a request information address section 604.

The program ID 601 is identification information of a program, and the download request 500
With the program identification information 510 (see FIG. 5) transmitted together with the information. The program address 602 indicates a storage position (address) in the storage unit 16 of the program body.

The used resource information address section 603 indicates a storage position (address) of used resource information indicating resources required for executing the program and a size of an area required for storing the program. FIG. 7 shows the configuration and contents of the used resource information 700 by taking, as an example, a download program (hereinafter, “program X”) of the program ID “X” indicated by the program management information 611 shown in FIG. The information is largely in the resources department 7
10 and a storage area unit 720. The resource section 710 stores information on resources necessary for executing the program X,
The storage area unit 720 stores information indicating the size of the area required for storing the program X.

The resource section 710 shown in FIG. 3 includes a resource type section 711 indicating the type of resource, and a resource ID section 7 which is resource identification information.
12. Usage area unit 71 indicating the size of the area required for the resource
Consists of three. From the contents of the used resource information 700, execution of the program X requires two task resources and one memory pool resource.
Is “A”, the area size is “0x3000”, and of the task resources, the ID is “B”, and the area size is “0”.
x4000 ", and the area size of the memory pool resource (ID:" C ") is" 0x300 ".

Here, the description returns to the program management table 600 shown in FIG. The system request information address section 604 indicates a storage location of system request information indicating the contents of a system request that needs to be issued when the program is executed. FIG. 8 is a diagram showing an outline of the contents of the system request information. For convenience of explanation, the contents of the request are described in characters, but the actual system requirements are described in a programming language. An example of a system requirement here is
It is required to shut down the system and restart it before executing the program. “Restart” on line 801 is a request to restart the system. Line 802
"Execution: X" is a request for program execution, and "X"
Is identification information of a program to be executed.

The description of the various types of information stored in the storage unit 16 has been completed, and the processing contents of each unit of the transmission source device 10 will be described below. Upon receiving the download request 500 (see FIG. 5) from the receiving side device 20, the request receiving unit 11 outputs the identification information 510 of the program to be downloaded included therein to the search unit 12 and instructs the search, and The content of the receiving device information 530 is output to the determination unit 13. Further, it outputs the hardware serial number 520 of the receiving device 20 to the rewriting unit 14.

The search section 12 searches the program ID section 601 of the program management table 600 on the condition of the value of the program identification information 510 output from the request receiving section 11, and finds the program management information corresponding to the requested program. read out. Then, based on the contents of the program management information (refer to FIG. 6), the storage unit 16 stores the main body of the program and the used resource information 70 relating to the program.
0 (see FIG. 7) and system request information 800 (see FIG. 8),
The used resource information is output to the determination unit 13, and the system request information is output to the program transmission unit 15.

Based on the contents of the receiving device information 530 obtained from the request receiving unit 11 and the used resource information 700 obtained from the searching unit 12, the determining unit 13 determines whether the requested program has Determine if it is executable.
The determination procedure is as follows. First, whether there is a program storage area capable of storing the program in the receiving side device 20 and whether resources required for executing the program can be secured in the receiving side device 20.
Judgment about the two requirements. If both of these conditions are satisfied, the program is executed by the requesting receiving device 20.
Is determined to be executable.

The specific contents of the judgment processing by the judgment unit 13 will be described with reference to FIGS.
This will be described with reference to FIG. First, the condition regarding the storage area is described. The contents of the storage area information section 532 included in the receiving apparatus information 530 and the used resource information 700 are described.
The determination is made by referring to the contents of the storage area unit 720.

First, based on the contents of the storage area information section 532 shown in FIG.
0000 "and" 0x400000 ". On the other hand, the storage area unit 72 in the used resource information 700
0, since the size of the area required for storing the program X requested to be downloaded is “0x500000”, the area size of the area “0x800000” of the two free areas of the receiving side device 20 It can be seen that it can be stored in the area of. Therefore, the condition regarding the storage area is satisfied.

Next, the resource condition is determined by referring to the contents of the resource management information section 531 in the receiving apparatus information 530 and the contents of the resource section 710 of the used resource information 700. Here, it can be seen from the contents of the resource unit 710 that the execution of the program X requires three resources (two task resources and one memory pool resource). The content of the resource management information section 531 is checked to determine whether each resource can be secured on the receiving device 20. First, a task resource whose identification information is “A” (hereinafter, “task resource A”) has a required area size of “0x3000”. On the other hand, looking at the resource management information section 531, the receiving-side apparatus 20 has two available task resources (those whose use state information is “UNUSED”), and the resource IDs are “2” and “2”, respectively. 3 "and the size of the reserved area is" 0x5000 "and" 0x4000 ". Accordingly, the resource A for the task includes the resource I in the receiving device 20.
The resource for the task of D “2” can be allocated. Similarly, a task resource whose identification information is “B” (hereinafter, referred to as “B”)
A task resource with a resource ID of “3” can also be assigned to “task resource B”).

Similarly, the memory pool resource whose identification information is “C” can be assigned to the only memory pool resource (resource ID value “2”) that can be used only by the receiving device 20. That is, since it is understood that all resources required for executing the program W can be secured on the reception-side device 20, it is understood that the conditions regarding the resources are also satisfied. Therefore, the determination unit 13 for the program X
Is determined to be “executable”, the determination unit 13 creates allocation information indicating which resource of the receiving device 20 is to be allocated to various resources necessary for program execution. , To the rewriting unit 14.

FIG. 9 shows the structure and contents (in the case of the program X) of the assignment information 900 created by the judgment unit 13. The assignment information 900 associates the identification information added to the resources necessary for executing the program on the transmission source device 10 with the identification information added to the resources available on the reception-side device 20, thereby enabling the program execution. It indicates which resource on the receiving device 20 side should be allocated to the required resource. The allocation information 900 includes a resource type unit 901, a transmission-side resource ID unit 902, and a reception-side resource ID unit 903.
The correspondence between the resource ID of the transmission source device 10 and the resource ID of the reception device 20 is obtained in the above-described determination process. That is, the transmission source device 10 determines that the I
The task resources to which D has been added include the I
The task resource of D “2” is assigned to the task resource to which the ID of “B” is added by the transmission source apparatus 10.
D is “3” and the source device 10 is “C”.
For the memory pool resources to which the identification information of
This indicates that a memory pool resource (ID “2”) that can be used only by the receiving device 20 is allocated.

Further, the determination unit 13 generates program information in which information necessary for storing and executing the program to be downloaded on the receiving side device 20 side, and outputs the generated program information to the program transmission unit 15. FIG. 10 shows an example of the configuration and contents of program information 1000 (in the case of program X). The program information 1000 includes the program ID section 1
010, storage area size section 1020, area ID section 103
0, a resource unit 1040. Program ID section 101
0 indicates identification information of the program to be downloaded.
The storage area size section 1020 indicates the size of an area necessary for storing the program. Then, the area ID unit 103
0 indicates in which storage area in the receiving device 20 the program should be stored by the identification information of the storage area.
The resource unit 1040 indicates the resources to be used by the receiving-side device 20 for executing the program by the type and the resource ID.
The program information 1000 is referred to by the resource acquisition unit 25 for updating the contents of the resource management table 300 and the storage area management table 400 when storing and executing the program on the receiving side device 20 side.

When the determination result is "executable", the determination unit 13 only notifies the result to the program transmission unit 15 and does not generate the allocation information or the program information. The rewriting unit 14 rewrites the content of the portion related to resource use in the program according to the content of the allocation information 900 and outputs the rewritten content to the program transmission unit 15 so that the receiving device 20 can execute the program. .
Specifically, the value of the resource identification information described in the program is rewritten from the value added by the transmission source device 10 to the value of the resource identification information used on the reception side device 20 side.
Such rewriting is performed because the resources of the receiving device used in the execution dynamically change for each device and according to the resource usage status at that time. Therefore, on the transmission source device 10 side, dummy identification information is described in the resource-related description portion of the held program, and upon receiving the request, it is possible to determine specifically which resource of which reception device is to be used. After the determination, the dummy identification information is rewritten to the actual resource identification information used by the receiving device.

FIG. 11 is a diagram showing what kind of rewriting the rewriting unit 14 performs specifically. The figure shows a portion related to resource use in the program list. FIG. 7A shows the contents before rewriting. A line 1101 is a description relating to the use of the first task resource, and a line 1102 is a description relating to the use of the second task resource. A line 1103 describes the use of the memory pool resource. Each resource ID has a dummy value (“A”, “B”, “C”): used resource information 700 (FIG. 7).
Reference) corresponding to the resource ID part 712).
With this dummy value, this program cannot be executed on the receiving device.

According to the contents of the assignment information 900 (see FIG. 9), the resource A for the task
The task resource of D “2”, the task resource B of the task ID of the receiving device 20 with the resource ID “3”, and the memory pool resource C of the resource ID of the receiving device 20 with the resource ID “2” Memory pool resources are to be allocated.
FIG. 11 (b) shows the result rewritten in response to this. As shown in the lines 1101 'to 1103', the resource ID portion of each of the task resources and the memory pool resources is rewritten. Further, the rewriting unit 14 transmits the hardware serial number “67” of the receiving device 20 received from the request receiving unit 11 to indicate that the rewritten program is to be executed by the receiving device 20.
5435 "is written in the line 1104 for describing the receiving-side device ID. Since the receiving side device 20 is set so as not to execute a download program in which its own hardware serial number is not written, illegal writing of the program can be prevented by writing the hardware serial number in this way.

The program transmission section 15 is provided with a program information table 1000 output from the determination section 13, a rewritten program body output from the program rewrite section 14, and system request information output from the search section 12. 800 is also transmitted to the receiving side device 20. (Operation) Hereinafter, the operation of the download system 1 at the time of the program download process will be described with reference to the drawings.

FIGS. 12 and 13 are flowcharts showing the operations of the receiving apparatus 20 and the transmitting apparatus 10 in one program download process. The download process is started when the receiving device 20 receives an instruction to issue a download request from the user, and therefore the description starts with the operation of the receiving device 20 shown in FIG.

First, the interface unit 21 receives an instruction to issue a download request from a user and identification information of a program to be downloaded (S120).
1: Yes). In response, the receiving-side device information generation unit 22
Generates the receiving-side device information, the request transmitting unit 23 receives the receiving-side device information generated by the receiving-side device information generating unit 22, the program identification information received by the interface unit 21, and the reception held by the request transmitting unit 23. Download request including the hardware serial number of the side device 20 (see FIG. 5)
Is transmitted to the transmission source device 10 (S1202).

When the receiving device 20 transmits the download request, the subject of the processing is the transmitting device 10. Hereinafter, a description will be given with reference to the flowchart of FIG. In the transmission source device 10, first, the request receiving unit 11 receives a download request from the reception side device 20 (S1301: Yes). Request receiving unit 1
In the information included in the download request, the program identification information is included in the search unit 12, the receiving device information (storage area information unit and resource management information unit) is determined in the determining unit 13, and the hardware serial number of the receiving device 20. Number rewriting unit 1
4 respectively.

The search unit 12 obtains program management information (see FIG. 6) corresponding to the program based on the program identification information, and rewrites the program read from the storage unit 16 based on the program management information. Then, the used resource information 700 (see FIG. 7) is output to the determination unit 13 and the system request information (see FIG. 8) is output to the program transmission unit 15 (S1302).

Next, based on the contents of the receiving device information 530 obtained from the request receiving unit 11 and the used resource information 700 obtained from the searching unit 12, the determining unit 13 determines whether the requested program is (S1303) whether or not the program can be executed (whether resources necessary for program execution can be secured in the receiving device 20). When the determining unit 13 determines that the program can be executed by the receiving-side device 20 (S1).
304: “executable”), program information 1000 (FIG. 1)
0) (S1305), and generates and outputs assignment information 900 (see FIG. 9) to the rewriting unit 14 to instruct rewriting of the program. In response, the rewriting unit 14 rewrites a part of the content of the program output from the search unit 12 and outputs it to the program transmission unit 15 (S1306).

The program transmission unit 15
At the time when the rewritten program is received from the receiving side device 20 in the order of the program information 1000 obtained from the determining unit 13, the system request information 800 obtained from the searching unit 12, and the rewritten program obtained from the rewriting unit 14. (S1307). When the determining unit 13 determines that the requested program cannot be executed on the receiving device (S1304: “executable”), the determining unit 13 instructs the program transmitting unit 15 to “execute unexecutable” on the receiving device 20. Is notified (S1308).

Thus, the process on the transmission source device 10 side in the download process is completed. Hereinafter, the subsequent operation of the receiving device 20 will be described with reference to FIG. 12 again. The receiving device 20 that has been waiting for a response waits for a response from the transmission source device 10 (S1203: Yes) and resumes the process. Source device 1 for download request
0 has transmitted the program (S1204: Ye
s) The program receiving unit 24 receives the program transmitted from the transmission source device 10 and the accompanying program information 1000, and first outputs the program information to the resource acquiring unit 25 to receive and execute the program. To acquire resources.

On the other hand, the resource acquisition unit 25 firstly stores the storage unit 27 in accordance with the contents of the program information 1000 in order to secure a storage area for the program to be downloaded.
Update the contents (storage area information) of the storage area management table 400 held by the server (S1205). FIG. 14 is a diagram illustrating the updated contents of the storage area information 1401 when the program X is stored in the storage area with the ID “1”. FIG. 14A shows a state before updating, and the value of the use state part of the storage area information 1401 for managing the storage area of ID “1” has a content indicating that it is not used (“UNUSED”). ing. The resource acquisition unit 25 refers to the contents of the program information 1000 (area ID section 1010 = “1”), rewrites the contents of the use state section of the storage area information 1401 ′ corresponding to the contents to “USED”, and In the section, the content “X” of the program ID section 1010 of the program information 1000
Is stored. As a result, the contents of the storage area management table 400 are as shown in FIG. Thus, the program X to be downloaded can be stored in the storage area of the area ID “1”.

Further, the resource acquisition unit 25 sets the area ID “1” for the area size “0x500000” of the program.
Is large as "0x8000000", and the size "0x300000" is too large, so new region management information 1402 is added so that this portion can be separated and used as another region. Then
The resource acquisition unit 25 updates the content of the resource management information in the resource management table 300, and secures resources for executing the program X to be downloaded (S1206).

FIG. 15 is a diagram showing how the resource acquiring unit 25 updates the contents of the resource management table 300 according to the contents of the program information 1000 (see FIG. 10). As shown in FIG. 11A, in the resource management table 300 before updating, two task resources (ID: “2”,
“3”) and one memory pool resource (ID: “2”)
Is unused ("UNUSED"). In the program information 1000 (resource unit 1040), all of these free resources are used for the execution of the program X. Therefore, the resource acquisition unit 25 uses these two task resources and one memory pool. Change the use status of the resource to "USED". FIG. 15B shows the result.

The resource acquisition unit 25 that has completed the above resource reservation
Notifies the program receiving unit 24 of that fact. Then, the program receiving unit 24 stores the received program in the storage area (ID: 1) secured by the resource acquiring unit 25 (S1207). When the reception and storage of the program is completed, the program receiving unit 24 outputs system request information (see FIG. 8) to the system request issuing unit 26,
Indicates that a system request is to be issued. System request issuing unit 2
6 issues a system request (system restart, execution request to program X) according to the system request information (S)
1208). As a result, the program X is executed on the receiving device 20.

When the program receiving unit 24 receives a notification of “program execution impossible” from the transmission source device 10 (S1204: No), the program receiving unit 2
4 instructs the interface unit 21 to present the user with a message notifying “download impossible” (S
1209). (Summary) As described above, in the download system 1 according to the present embodiment, the requesting receiving device 20 transmits the receiving device information to the transmitting device 10 together with the program download request, and the transmitting device 10 It is determined whether the requested program is executable on the current receiving device 20 based on the receiving device information, and the program is downloaded only when it is determined that the requested program is executable. Therefore, useless processing in which a program that cannot be stored or executed is downloaded to the receiving device 20 is not performed. (Embodiment 2) A feature of the download system according to the present embodiment is that the transmission source apparatus has the same processing contents as the standard program in addition to the standard program for the download program, and furthermore, the resources required for execution. Of the standard program and the spare program according to the status of the resources available in the requesting receiving device, and securely store and store them in the receiving device. The point is that what can be executed is selected and transmitted. The sequence of the download process is almost the same as the sequence (FIG. 2) in the first embodiment, except that “determination of whether or not to execute a program” is changed to “selection of executable program”. (Configuration) FIG. 16 is a configuration diagram showing an outline of the download system 2 in the present embodiment. The same components as those of the download system 1 according to the first embodiment are denoted by the same reference numerals, and description thereof is omitted. Only the transmission source device 210 performs processing unique to the present embodiment,
The configuration and processing content of the receiving side device 20 are the same as those in the first embodiment.

Source apparatus 210 in the present embodiment
Is different from the first embodiment in the contents of the program body and used resource information stored in the storage unit 216, and the program management information for managing these. Further, a selection unit 213 is provided instead of the determination unit 13 in the first embodiment. The processing contents of the program search unit 212 and the request reception unit 211 are partially different from those of the first embodiment.

First, the program stored in the storage unit 216 and its related information will be described. What is different from the first embodiment is a program body, a program management table 1700, and used resource information 1800. Storage unit 2
Each of the download programs stored in 16 has a spare program which has the same processing content but differs only in the size of the necessary storage area and the amount of resources.

FIG. 17 is a diagram showing an example of the configuration and contents of the program management table 1700 in the present embodiment. Program management table 6 in the first embodiment
Parts common to those of 00 are denoted by the same reference numerals, and description thereof is omitted. The program ID column 1710 contains the receiving device 20
The information indicating the correspondence between the program ID transmitted with the request and the program ID added to the program held by the transmitting device 210 is stored, and is divided into a request ID column 1711 and a storage ID column 1712. . The content of the request ID column 1711 is a program ID for specifying the program to be downloaded by the receiving device 20, and the content of the storage ID column 1712 is the program ID of the corresponding standard program and spare program.

Program management information 1701 (request ID
More specifically, a program that can be transmitted will be described in response to a download request (request ID: “X”) of the program “X” from the receiving device 20 as an example. 3 (each storage ID is "x
1 "," x2 ", and" x3 "), and each of these three programs has a separate storage location (program address 6).
02, and has unique used resource information (stored in an area indicated by the used resource information address unit 603) and system request information (stored in an area indicated by the system request information address unit 604).

Next, the used resource information in the present embodiment will be described. FIG. 18 shows that the transmitting device 210
D indicates usage resource information relating to three types of programs (storage IDs: “x1”, “x2”, “x3”) held corresponding to “X”. FIG. 21A shows the storage ID 1712.
(B) corresponds to the program of “x2”, and FIG. (C) corresponds to the program of “x1”.
3 "respectively. These three types of used resource information differ in the size of the storage area or the number of resources used.

The used resource information 1801 shown in FIG.
(For program x1) is information on a standard program. On the other hand, the used resource information 1 shown in FIG.
Looking at 802 (for program x2), the number of resources required for executing the program of “x2” is “x2”.
The number is one less than "1". Also, FIG.
The required resources indicated by the used resource information 1803 (for the program of “x3”) are the same in number as “x1” (two task resources and one memory pool resource), : B) is smaller than “x1”.

Next, processing unique to the present embodiment in each component will be described. First, the request receiving unit 211
Is a download request 500 (FIG.
), And the program identification information 510 of the information included in the received
30 is output to the selector 213. Program search unit 21
2 is the identification information 5 output from the request receiving unit 211
The program management table 1700 is searched using the value of 10 as a key, and the program management information in which the value of the request ID column 1711 matches the value of the identification information 510 is read. Then, based on the contents of the program management information (see FIG. 17), first, all the used resource information relating to the requested program is read from the storage unit 216 and output to the selection unit 213.

Then, the program search unit 212 waits for the selection unit 213 to notify the storage ID (contents of the storage ID column 1712) of the program selected as the program to be downloaded. And when you get the notification,
With reference to the program management information, an address of the storage location of the main body of the program and the system request information corresponding to the storage ID is acquired, and these are read out from the storage unit 216. Then, the program body outputs to the rewriting unit 14 and the system request information to the transmitting unit 15, respectively.

The selecting unit 213 compares the content of the receiving device information 530 of the receiving device 20 obtained from the request receiving unit 211 with the used resource information (plural) output from the program searching unit 212, and One executable program is selected from the group of programs corresponding to the program request ID requested from the side device 20. Hereinafter, a specific example of the receiving-side device information 500 will be described in the case where the download request of the program request ID “X” is transmitted from the receiving-side device 20.
The processing of the selection unit 213 will be described with reference to (see FIG. 5) and the used resource information (see FIG. 18).

The selecting section 213 first receives the receiving-side device information 53
0, the size of the reserved area of the usable storage area indicated by the storage area information section 532, and three types of used resource information 1801,
1802 and 1803 (x1, x
2, x3) is compared with the size of the used area. Looking at the storage area information section 532 of the receiving apparatus information section 530, two storage areas are vacant, and the storage area sizes are "0x800000" and "0x400000", respectively.
On the other hand, the size of the area required for storing the three types of download programs (the value of the program use area) is
"0x500000" and "0x40000" respectively
0 "and" 0x500000 ". Therefore, it can be seen that all three types of download programs x1, x2, and x3 can be stored in the larger one of the two free storage areas of the receiving device 20.

Next, the selection unit 213 selects a program based on resources used for executing the program. Looking at the resource information 531 of the receiving device information 530, the available resources that the receiving device 20 can use for execution of the download program at this time are “two task resources and 1 resource”.
Resources for one memory pool ". On the other hand, looking at the used resource information 1801 to 1803, the resources required for the execution of the program are as follows: the programs x1 and x3 are “two task resources and one memory pool resource”;
2 is “one task resource and one memory pool resource”, which is sufficient for all programs in terms of number.

However, the used area sizes of the free task resources that can be used by the receiving apparatus 20 are “0 × 500”.
0 "and" 0x4000 ". On the other hand, the size of the task resource used area required for the execution of the program x1 is" 0x3000 "and" 0x8000 "(see the used resource information 1801). Therefore, the size of the program x1 is insufficient for one of the task resources even if the program x1 is downloaded to the receiving device 20.
It turns out that it cannot be performed. On the other hand, the program x
Regarding 2, x3, there is no problem in terms of the used area size, and it can be executed on the receiving device 20. Therefore, the selection unit 213 selects one of the two programs x2 and x3, and notifies the program search unit 212 of the identification information (storage ID) of the selected program. Here, it is assumed that the program x2 which is the smaller program storage area is selected.

Subsequent processing of the selection unit 213 is the same as the processing of the determination unit 13 in the first embodiment. That is, for the selected program, the allocation information (FIG. 9)
) And outputs it to the rewriting unit 14. In addition, it creates a program information table (see FIG. 10) and outputs it to the program transmission unit 15. The process of the selecting unit 213 when it is determined that there is no executable program in the receiving device 20 is the same as the process when the determining unit 13 determines “executable” in the first embodiment. The transmitting unit 15 is notified that the program cannot be downloaded.

After the selection unit 213 selects a program, the processing contents of the components of the transmission device 210 (program rewriting unit 14 and program transmission unit 15) are the same as those in the first embodiment. That is, the rewriting unit 1
4 rewrites the program in accordance with the allocation information, and the program transmission unit 15 transmits the rewritten program and program information to the receiving device 20. (Operation) The operation of the reception-side device 20 is the same as that of the first embodiment (see FIG. 12), and therefore the description is omitted. Also, the operation of the transmitting apparatus 210 is almost the same as that of the first embodiment shown in FIG. 13, and specifically, the processing corresponding to step S1303 is described as “the execution of the requested program. It merely changes from "determination" to "select an executable program from a plurality of programs corresponding to the request". (Summary) As described above, in the download system 2 in the present embodiment, the transmission source device 210 prepares a plurality of patterns of programs having the same processing contents and different resource amounts required for execution, and Is received, the executable program is selected and downloaded according to the situation of the receiving device 20 side from the request.
The situation that the downloaded program cannot be executed on the receiving side device 20 side can be prevented, and the situation that the program cannot be downloaded to the receiving side device 20 due to lack of resources is less likely to occur as compared with the first embodiment. (Embodiment 3) Hereinafter, a third embodiment of the download system according to the present invention will be described. The feature of the present embodiment is that the transmission source device 2
A part of the program selection process performed by the tenth side (selection unit 213) (the process of selecting one of a plurality of programs that can be executed by the receiving side device) is performed by the user at the receiving side device. It is a point to make. (Overall Configuration) FIG. 19 is a block diagram showing the configuration of the download system 3 in the present embodiment. Second
Components common to the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

In the download system 3 of the present embodiment, the transmission source device 310 prepares a plurality of patterns having different storage areas and different resources for each download program, as in the second embodiment. .
The difference from the second embodiment is that, in response to a request from the receiving device 320, the transmission source device 310 selects all executable programs in the resource usage status of the receiving device 320 from a plurality of programs corresponding to the request ID. And transmitting the program to the receiving device 320 with the addition of feature information indicating the feature of each program. Then, the receiving apparatus 320 presents the features of each program to the user, selects one of them, and executes the selected program. Before describing each component, an approximate flow of the download process will be described.

(Overview of Download Process) FIG. 20 is a sequence diagram showing the procedure of the download process and the flow of information accompanying the download process. Detailed description of portions common to the processing procedure of the first embodiment shown in FIG. 2 will be omitted. First, after the receiving device 320 receives an instruction of a download issuance request from the user, the request is transmitted to the transmission source device 3.
Processing up to transmission to (10) is performed in the first embodiment.
Is the same as

The transmission source device 310 that has received the request reads out the used resource information relating to a plurality of programs corresponding to the requested program ID (request ID) (a), and receives the used resource information together with the request and receives the information. All the programs that can be executed by the receiving device 320 are selected in comparison with the device information (b). And the transmission source device 3
10 is for the program selected in the process (b)
The program information including the feature information indicating the feature of each program is transmitted to the receiving device 320 (c).

The receiving side device 320 presents the characteristic information of each program included in the transmitted program information to the user, and selects one program (d). Then, the identification information (storage ID) of the selected program is transmitted to the transmission source device 310 (e). The subsequent processing is the same as the processing (FIG. 2) after the program transmission in the first embodiment. The selection unit 313
As a result of the determination, when there is only one executable program or 0 in the receiving device 320, the processing after the determination is exactly the same as the processing of the first embodiment shown in FIG. is there.

Hereinafter, the source device 310 and the receiving device 32
The processing of each component of the configuration 0 will be described focusing on the contents of the processing (a) to (e) shown in the sequence diagram of FIG. (Configuration of source device 310) Hereinafter, the configuration of the source device 310 will be described. The components having the same processing contents as those in the first or second embodiment are denoted by the same reference numerals, and description thereof is omitted. In the present embodiment, components that perform unique processing are the selection unit 313 and the program transmission unit 315. The rewriting unit 14 has the same processing content as the first and second embodiments, but may have a plurality of programs to be processed. Further, characteristic information unique to the present embodiment is added to the used resource information stored in the storage unit 316.
Along with this, the contents of the program information generated based on the used resource information also differ.

First, the used resource information in the present embodiment will be described. FIG. 21 shows an example of the configuration and contents (storage ID “x”) of used resource information 2100 in the present embodiment.
3 ”for a program corresponding to“ 3 ”).
The used resource information 2100 is almost the same as the used resource information 1803 (see FIG. 18C) in the second embodiment, except that it further has a feature information section 2110 which is text data describing the features of the program. I have. The contents of the characteristic information (“the size of the area”, “the speed of processing”) are the characteristics when compared with each other in the program group corresponding to the same program request ID. FIG.
Shows that the program x3 is replaced with the programs x1, x
This is a feature when compared with 2.

Next, the processing of each component will be described. The processing of the selection unit 313 is the same as that of the embodiment up to the part that determines a program that can be executed by the receiving device 320 based on the receiving device information 500 transmitted from the receiving device 320 and the used resource information of the program. Selection part 213 of 2
Is the same as However, as a result of the determination, when there are a plurality of executable programs, the selecting unit 213 of the second embodiment selects one of them, while the selecting unit 313 of the present embodiment selects all the executable programs. , A process for transmission to the receiving device 320 is performed. That is,
Assignment information (see FIG. 9) and program information are created for each program.
The program information is output to the program transmission unit 315. The program information according to the present embodiment includes the characteristic information 211 included in the above-described used resource information 2200.
0 is added to the program information 1000 in the first and second embodiments.

FIG. 22 is a diagram showing an example of the configuration and contents of program information 2200 in the present embodiment (in the case of program x3 as in FIG. 21). Portions common to the program information (see FIG. 10) in the first and second embodiments are denoted by the same reference numerals, and description thereof is omitted. The feature of the program information 2200 in the present embodiment is that a feature information section 2250 which is an area for storing the above-mentioned feature information is added first. What is stored in the program ID section 2210 is the “request ID”.
Rather than the “storage ID”.

The program transmission unit 315 includes a selection unit 313
When the program information about a plurality of programs is output from the above (when the selection unit 313 selects a plurality of programs), first, all the program information alone is transmitted to the receiving side device 320. Then, it waits for the identification information (storage ID) of the program selected by the user to be transmitted from the receiving device 320.

When the storage ID is transmitted from the receiving device 320, the program transmission unit 315 converts the program corresponding to the storage ID out of the rewritten program output from the rewriting unit 14 to this. Is transmitted to the receiving side device 320 in combination with the system request information related to. In addition, as a result of the selection process of the selection unit 313, the process of the program transmission unit 315 when only one or zero programs can be executed by the reception-side apparatus 320 is different from the program transmission units of the first and second embodiments. Is the same. (Configuration of Receiving Side Device 320) The configuration of the receiving side device 320 will be described below. The components having the same processing contents as those in the first or second embodiment are denoted by the same reference numerals, and description thereof is omitted. The unique processing in the present embodiment is after the download from transmission source device 310 is started. The component that performs the unique processing is the interface unit 32
1. The program receiving unit 324.

The program receiving section 324 includes
After temporarily storing the program information transmitted prior to the program from the program 10, the program information of each program is output to the interface unit 321 to instruct the user to accept the designation of the program selection by the user. Then, when the identification information of the program selected by the user is output from the interface unit 321, the storage ID of the program corresponding to the identification information is transmitted to the transmission source device 310, and the corresponding program body is transmitted. Wait for Then, when the program is transmitted, the program body is stored in the program storage area, and the program information is output to the resource obtaining unit 25 and the system request information is output to the system request issuing unit 26.

The process of the program receiving unit 324 is performed when the program downloaded from the transmission source device 310 is one.
This is the same as in the first and second embodiments when the number is one and when the transmission source device 310 notifies the user that “program transmission is impossible”. The interface unit 321 performs a process of allowing the user to select one of a plurality of download candidate programs in addition to the process (accepting a download request from the user) in the first and second embodiments.

When receiving an instruction to accept and execute a program selection from the user from the program receiving unit 324, the interface unit 321 receives a selection instruction based on the feature information and the storage ID of each program sent together with the instruction. A program selection screen (GUI) is generated and displayed on the display. FIG. 23 is a diagram illustrating an example (in the case of programs x2 and x3) of a program selection screen 2300 displayed on the display of the receiving device 320 by the interface unit 321. The program selection screen 2300 includes an information display unit 2310 for displaying the contents of the program information for each program, a check box 2320 for checking a program selected by the user, and a decision button 2330 for notifying the user of the selection. Is provided.

The information display section 2310 displays the program receiving section 324 to the interface section 32.
1 is the content of the characteristic information included in the program information output to 1. When the user checks the check box 2320 of the specific program on the program selection screen 2300 and clicks the OK button 2330, the interface unit 321 notifies the program receiving unit 324 of the identification information (storage ID) of the checked program.

The processes of the resource acquiring unit 25 and the system request generating unit 26 after the program receiving unit 324 receives the program are the same as those in the first and second embodiments. (Summary) As described above, in the download system 3 in the present embodiment, the transmission source device 310
When there are a plurality of programs that can be downloaded in response to the request of No. 20, the feature information is transmitted to the receiving side device 320,
The user can select a program based on the characteristic information. Therefore, in addition to realizing the effects that can be realized in the second embodiment, it is also possible to select a program according to the user's intention. (Embodiment 4) In the present embodiment, the receiving side device determines whether or not the program can be executed, which has been performed by the transmission source device in Embodiments 1 to 3. The determination is not made based on the used resource information held by the transmitting device and the receiving device information generated by the receiving device as in Embodiments 1 to 3, but is held by the transmitting device. This is performed by temporarily executing a resource securing script (hereinafter referred to as a “resource script”) by the receiving apparatus before downloading the program. Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

FIG. 24 shows a download system 4 according to the present embodiment. The same components as those of the download system 1 according to the first embodiment are denoted by the same reference numerals. The structural features of the present embodiment are as follows. First, it is determined that the transmission source device 2410 has no configuration for determination processing and does not hold used resource information, and that the reception side device 2420 has no configuration for generating reception side device information. And a provisional script execution unit 2423 for performing the processing.

Before describing these configurations, an approximate flow of a download process in the download system 4 of the present embodiment will be described. (Outline of Download Processing) FIG. 25 is a sequence diagram showing a procedure of download processing in download system 4 according to the present embodiment and a flow of information accompanying the download processing.

First, the receiving side device 2420 receives a message from the user.
An instruction to issue a download request for a program is received (). Then, the receiving device 2420
The transmission request (including the program ID) of the resource script relating to the program is transmitted to the transmission source device 2410 (). Upon receiving the resource script request from the receiving device 2420, the transmission source device 2410 reads the resource script corresponding to the download program added to the request. Then, the read resource script is transmitted to the receiving side device 2420 ().

The receiving side device 2420 checks whether the resources required for executing the program to be requested for download can be secured by temporarily executing the received resource script (). As a result, if there is a necessary resource, the receiving device 2420 transmits a program download request to the transmission source device 2410 ().
Then, when the program is downloaded from the transmission source device 2410 (), the program is received and stored, and while the resources are properly secured, a necessary system request is issued and the program is executed. ().

If the result of the temporary execution of the resource script is “cannot secure necessary resources”, the receiving side device 2420 notifies the transmission source device 2410 of the cancellation of the request transmitted by The user is also notified that “downloading is impossible”. (Configuration) Next, the configuration of the download system 4 in the present embodiment will be described. (Configuration of source device 2410) First, the configuration of the source device 2410 in the present embodiment will be described. The transmission source device 2410 is the transmission source device 1 according to the first embodiment.
0 does not include the determination unit 13 and the rewriting unit 14, and the storage unit 16 stores the used resource information 70 according to the first embodiment.
A resource script 2600 is stored instead of 0.

As described above, the transmission source device 2410 has such a configuration in the present embodiment.
This is because the processing performed by the determination unit 13 and the rewriting unit 14 is performed by the receiving device 2420, and whether or not to secure the resources required for executing the program is determined by the temporary execution of the resource script. is there. FIG. 26 shows a specific example of the resource script stored in the storage unit 16 of the transmission source device 2410 in the present embodiment.

The resource script in the present embodiment is
It replaces the used resource information in the first embodiment. Like the used resource information, one corresponds to each download program, and specifically, is set in the program management table (see FIG. 6). The information is associated with the information (the resource script address is set instead of the used resource information address).

The resource script shown in the figure is a resource script for securing resources required for executing a certain download program, and includes a task script 2610 for acquiring resources required for executing a task, and a counting semaphore resource. It comprises a semaphore script 2620 for acquiring and a message queue script 2630 for acquiring message queue resources.

Each script has, as a basic configuration, a resource name portion 2601 in which identification information of the acquired resource (corresponding to the resource type 711 and the resource ID 712 of the used resource information 700 (see FIG. 7)), A function unit 2602 in which a function is set and a parameter unit 2603 in which characteristics relating to a resource to be acquired are specified. The task script 2610 executes the script function “DefTask” to acquire a task execution resource, and sets the acquired resource name to “TASK1”. The parameter section 2603 includes the acquired task (identification information “TAS
K2 ″), a parameter 2 that specifies the execution priority
611, a parameter 261 for specifying an entry point
2. Required stack size (used resource information 700 (FIG. 7
2613), a parameter 2613 for specifying the use area 713), and a parameter 26 for specifying the execution state at the time of startup.
14 is designated.

The semaphore script 2620 executes the script function “DefSem” to acquire a counting semaphore resource, and sets the acquired resource name to “SEM1”. The parameter unit 2603 includes an initial value parameter 2621 for designating an initial value of the acquired counting semaphore (identification information “SEM1”), and whether or not to execute priority maintenance when a wait state occurs in the acquisition process. Is specified.

Script for message queue 2630
Executes the script function “DefQueue” to acquire the resource for the message queue, and renames the acquired resource name to “Q
UE1 ″. Parameter section 26
03, the acquired message queue (resource name “QUA”
Regarding E1 ″), a size parameter 2631 that specifies the size of the message handled by this, a number parameter 2632 that specifies the number of messages, and whether or not to carry out priority handling when a wait state occurs in the acquisition process Parameter 2633 has been specified.

As a result of not including the determination unit 13 and the rewriting unit 14, the processing of the search unit 2412 is different from that of the search unit 12 in the first embodiment. That is,
Upon receiving the resource script request transmitted from the receiving device 2420 via the request receiving unit 11, the search unit 2412 searches the program management table 600 using the program ID added to the request as a key, and responds to the program. To obtain the address of the resource script to be
When the resource script is read from the program, the resource script is transferred to the program transmitting unit 15 and transmitted to the receiving device 2420.
After that, when a program request is sent from the receiving device 2420, the download program corresponding to the identification information included in the request and the system request information corresponding to the download program are read out from the storage unit 16, and the program transmission unit 1520 is read. To the receiving side device 2420 for transmission. (Structure of Receiving-Side Device 2420) The receiving-side device 2420 in the present embodiment has the rewriting unit 2428 included in the transmission source device 10 in the first embodiment, and also includes the determination unit 13 in the first embodiment. Has a temporary script execution unit 2423. In addition, since the resource acquisition is performed based on the resource script, a program storage area acquisition unit 2427 and a resource final reservation unit 2425 are provided instead of the resource acquisition unit 25 in the first embodiment. In addition, the receiving-side device information generation unit 22 according to the first embodiment becomes unnecessary, and accordingly, the interface unit 242
1. The request transmitting unit 2422 and the program receiving unit 2424 perform processing unique to the present embodiment.

First, the interface unit 2421 sends a download request issuance instruction received from the user to the request transmission / reception unit 2422. The request transmission / reception unit 2422 transmits a script request to the transmission source device 2410 together with the program identification information included in the instruction. Then, the program receiving unit 2424 receives the resource script transmitted from the transmission source device 2410 in response thereto. The program receiving unit 2424 sends the received resource script to the temporary script execution unit 2423. After that, in response to the resource script temporary execution result by the temporary script execution unit 2423, the request transmission unit 2422 requests the program download (when the result of the temporary execution is “resource obtainable” for all the resource scripts), or downloads. A process cancellation notification (when there is at least one resource script whose tentative execution result is “resource acquisition impossible”) is transmitted to the transmission source device 2410.

The temporary script execution unit 2423 temporarily executes the resource script received from the program reception unit 2424 to determine whether the download program required by the user can be executed (whether the execution resources can be obtained). Also,
If the result of the determination is "resource acquisition possible", the use of the execution resource is declared in the system of the receiving device 2420 so that these resources are not used by other programs. Specifically, the value of the use state column 330 in the resource management information (see FIG. 3) regarding these resources is set to “UESD”. Storage area management information on the program storage area (see FIG. 4)
Is set to "USED". Then, the identification information of the resource and the program storage area that are declared to be used are notified to the resource final securing unit 2425 and the program storage area acquisition unit 2427 together with the identification information of the program.

Then, the temporary script execution unit 2423
The determination result (“resource acquisition possible” or “resource acquisition impossible”) is passed to the request receiving unit 2422. Program receiving unit 2424
Receives the download program and the system request information for the program from the transmission source device 2410, and performs the following processing accordingly. First, when the reception of a program is started, the identification information of the program is notified to the resource final securing unit 2425 and the program storage area acquisition unit 2427. Finally, an instruction is provided to obtain the program for execution. In response to this, the program storage area obtaining unit 2427 waits for a notification of completion of the acquisition to be returned together with the address information of the area, and stores the received program in the area. As for the system request information, similarly to the program receiving unit 24 in the first embodiment, the system request issuing unit 2
Send to 6. When the storage of the program is completed, a completion notification is sent to the rewriting unit 2428.

The resource final securing unit 2425 finally secures the resources declared to be used as a result of the temporary script execution by the temporary script execution unit 2423 for executing the download program. Then, a resource information table in which information (resource information) on the secured resources is compiled is sent to the rewriting unit 2428 to instruct the rewriting of the download program.

FIG. 27 shows an example of the configuration and contents of the resource information table 2700 generated by the resource final securing unit 2425. The resource information table 2700 includes a resource name column 2710,
It comprises a resource ID column 2720 and a resource address column 2730. The resource name column 2710 stores the resource name (see FIG. 26) added to the resource acquired by the resource script, and the resource ID column 2720 stores the resource final securing unit 242.
5 stores the identification information of the resource actually acquired (corresponding to the value of the resource ID section 320 of the resource management table 300 in the first embodiment). Set in the resource address column 2730 is the address in the storage unit 27 of the resource actually acquired by the resource final securing unit 2425. Note that the value set in the resource name column 2710 corresponds to the resource ID on the transmitting device side in Embodiment 1 (see FIGS. 7 and 9).

The resource information 2701 is information relating to the task resources obtained according to the task script 2610 in FIG. In script 2610, "T
This indicates that a resource to which the identification information “2” has been added is acquired by the receiving device side 2420 with respect to the resource indicated by the resource name of “ASK1.” Similarly, the semaphore scripts 2620 and In the message queue script 2630, “SEM1”, “QUA”
For the resource indicated by the resource name of “E1”, this indicates that the resources to which the identification information “3” and “4” are added are acquired by the receiving device side 2420, respectively.

The rewriting unit 2428 is a resource final acquisition unit 2
When a rewrite execution instruction is received from 425, reception of a download program from program reception unit 2424,
Wait for the storage completion notification to be sent together with the storage area address. Then, according to the contents of the resource information table 2700 sent together with the rewrite execution instruction, the resource ID of the resource actually acquired by the resource final acquisition unit 2425 is embedded in the resource name portion of the stored download program.

FIG. 28 is a diagram showing an example of download program rewriting performed by the rewriting unit 2428. FIG.
FIG. 8A is an extract of a part related to resources in the download program 2800 before rewriting received by the program receiving unit 2424. Statement 2810 declares the resource name of the resource used. The resource name here corresponds to the resource name specified in the resource name section 2601 of the resource script. The use function 2811 is a function for declaring the name of the resource to be used. Parameter section 2812,
In 2813, the name of the resource is specified. Here, the same name as the semaphore resource “SEM” shown in FIG.
1 "and the name of the message queue resource" QUE1 ".

The statement 2820 defines a task entry of a task corresponding to the task resource script 2610 shown in FIG. “Task_entry” function 2821
Is a function indicating the entry point of the task. Statement 2
830 shows the use of a counting semaphore. “Wai_se
An “m” function 2831 indicates a system call for waiting to acquire a counting semaphore. A “ref” function 2832 is a function for acquiring identification information of a resource used when executing a program. To obtain the identity of the resource obtained by
The resource name “S” specified in the semaphore script 2620
EM1 "is specified.

Statement 2840 indicates the use of a message queue. A “snd_que” function 2841 indicates a system call for transmitting a message queue. “Ref”
The function 2842 is a function for acquiring identification information of a resource used at the time of executing a program. Here, the resource name “QUE1” specified by the message queue script 2630 is specified in order to obtain the identification information of the resource acquired by executing the message queue script 2630. The parameter 2843 is “snd_qu
A variable that stores a message to be transmitted by the e ″ function 2841 is specified.

FIG. 17B shows the download program 2800 after rewriting. The part of the “ref” function in the sentences 2830 and 2840 is the identification information 2832 ′ and 28 of the resource actually acquired in the receiving device 2420.
42 'has been rewritten. This rewriting is performed by using FIG.
Are performed according to the contents of the resource information 2702 and 2703 shown in FIG. (Operation) Hereinafter, operations of the receiving device 2420 and the transmission source device 2410 in the download processing according to the present embodiment will be described. (Operation of Receiving Side Device 2420) FIG. 29 is a flowchart showing the operation of the receiving side device 2420 in the download processing.

In the receiving device 2420, the download process starts when the interface unit 2421 receives a download request issuance instruction from the user (S2901: Yes). The request transmission unit 2422 that has obtained the content of the instruction from the interface unit 2421 transmits the resource script request to the transmission source device 2410 together with the identification information of the download target program included in the instruction (S2).
902).

The transmission source device 241 in response to the script request
The resource script transmitted by “0” is received by the program receiving unit 2424 and passed to the temporary script execution unit 2423. The temporary script execution unit 2423 temporarily executes the resource script, determines whether resources necessary for executing the download program can be acquired, and passes the determination result to the request transmission unit 2422 (S2903).

If the determination result is “resource acquisition impossible” (S2904: No), the request transmission unit 2422 notifies the transmission source device 2410 of the cancellation of the download request, and notifies the user of the download impossibility (S2905). When the judgment result is “resource acquisition possible” (S2904: Ye
s), the request transmission unit 2422 transmits a program download request to the transmission source device 2410 (S2906).

The transmission source device 24 responds to the download request.
The program received by the program 10 and the associated system request information are received by the program receiving unit 2424 (S2907). The program receiving unit 2424 instructs the resource final securing unit 2425 to execute the script temporary execution unit 2
423 finally obtains the temporarily obtained resource (S
2908). Also, the program receiving unit 2424 instructs the program storage area obtaining unit 2427 to obtain an area for storing the downloaded program (S290).
9).

Then, after the storage area is obtained, when the received program is stored in the area (S2910), the program receiving unit 2424 notifies the rewriting unit 2428 of the completion of the storage. The rewriting unit 2428 rewrites the stored program accordingly as shown in FIG. 28 (S2911). Subsequent processing is the same as that of the first embodiment, and the program receiving unit 2424 outputs system request information to the system request issuing unit 26 after waiting for completion of the rewriting process by the rewriting unit 2428, and outputs the system request information. Issuance. System request issuing unit 26
Issues a system request (system restart, execution request to program X) according to the system request information (S2).
912). As a result, the download program is executed on the receiving device 2420. (Operation of Source Apparatus 2410) FIG. 30 is a flowchart showing the operation of the source apparatus 2410 in the download processing.

The transmission source device 2410 starts the download process when the request receiving unit 11 receives the resource script request from the reception side device 2420 (S3001: Ye)
s). Then, the program search unit 2412 reads the resource script corresponding to the program identification information attached to the resource script request from the storage unit 16 and passes the resource script to the program transmission unit 15, and the resource script is received by the receiving device 2420.
(S3002).

Thereafter, the process waits until a response corresponding to the result of the temporary execution of the resource script is sent from the receiving device 2420 to the request receiving unit 11 (S3003: Yes). When the request receiving unit 11 receives a program download request (S
3004: Yes), the search unit 2412 reads the download program corresponding to the program identification information attached to the download request from the storage unit 16 together with the corresponding system request information, and the read program and the system request information are transmitted by the program transmission. It is transmitted to the receiving side device 2420 by the unit 15 (S3005). (Summary) As is clear from the above description, the download system 4 according to the present embodiment
Whether the program can be downloaded to the receiving side device 24
The determination is made by tentatively executing the resource script received from the source device 2410 by the source device 20. In addition to being able to prevent the download process of the unexecutable program, the load of the transmission source device 2410 per download process is reduced by performing the determination by the receiving device 2420.
Even when download requests are concentrated on the transmission source device 2410 in a short time, stagnation of the download process is less likely to occur. The provisional execution of the resource script also serves as a part of a resource securing process which is a program execution process.
Therefore, the load of the determination process is lighter than that of the systems of Embodiments 1 to 3 in which the reception-side device information is generated and compared with the used resource information, and the time required for the download process is correspondingly reduced. Can be shortened. (Embodiment 5) In the download system according to the present embodiment, a check on a device or a program provided in a receiving apparatus is performed by executing an inspection script transmitted from a transmitting apparatus to a receiving apparatus.

In the embodiments described above, the storage area and the program resources (tasks, memory pools, semaphores, message queues) are mentioned as the conditions for determining whether or not the download program can be executed. It is not limited to these. For example, the function of the receiving device can also be a condition for determining whether to execute the download program. For example, the presence or absence and performance of a device (such as a communication modem), the presence or absence of a built-in (installed) program (such as a character conversion program), and functions.

FIG. 31 is a block diagram showing the configuration of download system 5 according to the present embodiment. The same components as those in the fourth embodiment are denoted by the same reference numerals.
Description is omitted. (Configuration) The configuration of the download system 5 according to the present embodiment will be described below. The same components as those in the fourth embodiment are denoted by the same reference numerals, and description thereof is omitted. (Configuration of source device 3110) The configuration of the source device 3110 that performs processing unique to the present embodiment is the search unit 3112. In addition, the storage unit 16 stores an inspection script corresponding to each download program. The correspondence between each download program and the inspection script is defined by the information set in the program management table 600, like the resource script and the system request information.

FIG. 32 shows an example of an inspection script used to determine whether a program can be downloaded in the present embodiment. FIG. 7A shows a script 3210 for device check, which is one type of inspection script. The script is used for checking a function of a modem (not shown) included in the receiving device 3120.

Device Check Script 3210
Consists of a result part 3211 and a function part (CheckModem and below). The result part 3211 is a part for specifying a value expected as an execution result of the function part, and the specification “OK” here indicates that the expected execution result is “normal”. In the function part, the script function name 3212 is
This is a part for specifying the check target.
"dem" indicates that the target is a modem. Condition part 32
Reference numeral 13 designates a function expected of the modem as a premise for executing the download program. Here, a value of "9600" is specified as the minimum baud rate, and a value of "38400" is specified as the maximum baud rate. . "Minimum baud rate = 9600 & maximum baud rate = 38400" specified in condition part 3213
Is satisfied by the modem of the receiving side device 3120, the execution result of the function "CheckModem" is "OK" and the script ends normally, but if not, the script is interrupted.

FIG. 17B shows a program check script 3220 which is a kind of inspection script. The script checks whether or not the character conversion program has a kana-kanji conversion function. Result part 3
Reference numeral 221 denotes a part for specifying a value expected as an execution result of the function part (CheckModule and below). The specification “OK” here indicates that the expected check result is “normal”. In the function part, the script function name 3222 is a part for specifying a check target,
“CheckModule” indicates that the target is a program. The condition unit 3223 specifies a function expected of the program to be checked as a premise of execution of the download program, and includes a program identifier “Kanakan” indicating the program to be checked and a function parameter “Kana-Kanji” indicating the required function. Conversion ”. "Identifier is" Kan "specified in condition part 3223
If the receiving device 3120 satisfies the condition of “the program of“ akan ”has“ kana-kanji conversion function ””, the execution result of the function “CheckModule” is “OK” and the script ends normally. If not, the script is aborted.

FIG. 33 shows an example of a program to be checked by the check script shown in FIG. 32 (b). The program is described in a programming language C, and only a part of the program is illustrated. Statement 3310
Is a statement that declares a function of the inspection target program, and a “DefModule” function 3311 is a function that declares a program name and a function. Parameter 33
Numeral 12 designates a name for identifying a program, and a parameter 3313 indicates a function of the program. (Configuration of Reception-Side Device 3120) The unique configuration of the reception-side device 3120 in the present embodiment is an inspection script execution unit 3121. The inspection script execution unit 312
With the addition of 1, the request transmitting unit 3122 and the program receiving unit 3124 perform processing unique to the present embodiment.

The program receiving section 3124 receives the resource script and the inspection script transmitted from the transmission source apparatus 3110 in response to the resource script request from the receiving apparatus 3120, and sends the resource script to the temporary script execution section 2423. Script inspection script execution unit 3
121, respectively. Inspection script execution unit 3
121 executes the inspection script and outputs the execution result (normal termination or interruption) to the request transmission unit 3122.

The request transmitting unit 3122 transmits a program download request or a download cancel notification to the transmission source device 3110 based on the inspection script execution result sent from the inspection script executing unit 3121. The request transmitting unit 2422 according to the fourth embodiment transmits a program download request when all execution results of the resource script are normally completed. However, the request transmitting unit 3122 outputs the execution result of all the resource script and the inspection script. Sends a program download request when the process is successfully completed. (Operation) Download system 5 in the present embodiment
Is almost the same as the operation of the download system 4 in the fourth embodiment, and the description is omitted. (Summary) As is apparent from the above description, according to the download system of the present embodiment, it is possible to download the program after checking the presence or absence of the device and the performance of the receiving device, the presence or absence of the program, and the function. it can. Therefore, even when it is necessary to satisfy the conditions related to the device and the program in addition to securing resources for executing the program, it is possible to prevent unnecessary downloading of the unexecutable program. In addition, since the determination is made in such a manner that the receiving device executes the script sent from the transmission source device, the receiving device collects and transmits information on the device and the program in the form of the receiving device information. No need.

Note that the characteristic process of this embodiment, that is, the determination of whether or not download is possible by executing the inspection script, can be applied to all of the first to fourth embodiments. Further, the check of the device and the program can be executed by means other than the inspection script. For example, the transmission source device holds “necessary device information” and “necessary program information”, transmits this to the receiving side device, and the receiving side device inquires these information in its own configuration information to download. It is conceivable to judge the possibility of the above. (Remarks) In the first to third embodiments, the download system is a CATV broadcast station and a receiving set-top box, but this is an example. In addition to this, for example, a case may be considered in which a program such as online shopping or a video game is transmitted from a server of a service provider to a terminal such as a set-top box installed in a subscriber's home. Further, transmission and reception between the transmission source device and the reception side device may be realized by wireless communication.

In the first to third embodiments, the download of the program is all started by a request from the receiving side device. In some cases, such as downloading, the program is started to be downloaded from the transmission source device irrespective of a request from the receiving device side. In this case, first, the transmission source device requests the reception-side device to generate and transmit the reception-side device information, so that the download process is started. The processing after the transmission source apparatus receives the reception-side apparatus information is the same as that described in the first to third embodiments.

It should be noted that the number of the embodiments described above is five, but it is possible to realize still another embodiment by combining the features of the embodiments in a manner that does not contradict each other.
For example, it is conceivable that the device or program check in the fifth embodiment is performed by the transmission source device in the first to third embodiments. In this case, the receiving device adds information about the device or the program to the receiving device information and transmits the information to the transmitting device. Further, the mode in which the transmission source device prepares a plurality of programs having the same function as described in the second and third embodiments can be applied to the fourth and fifth embodiments. In this case, the receiving device temporarily executes or executes the resource script and the inspection script for a plurality of programs transmitted in response to one download request, and requests download of the executable program according to the result. Will be.

[0126]

As is apparent from the above description, the download system of the present invention is a download system comprising a receiving device for receiving and executing a program and a transmission device for transmitting the program to the receiving device. hand,
The receiving device includes an information generating unit configured to generate receiving device information indicating a use state of a program execution resource included in the receiving device, identification information indicating a program to be downloaded, and a reception unit configured by the information generating unit. Request transmission means for transmitting a download request including the side device information to the transmission source device, and program reception means for receiving a program transmitted by the transmission source device in response to the download request, The transmission source device includes a program holding unit that holds one or more programs in association with identification information, and a resource information holding unit that holds necessary resource information indicating resources required for execution of each of the one or more programs. Request receiving means for receiving the download request transmitted from the receiving device,
Receiving, from the required resource information regarding the program indicated by the identification information included in the download request received by the request reception unit and the receiving-side device information included in the download request, the program indicated by the identification information included in the download request; A determination unit that determines whether the side device can execute the program; and a program transmission unit that transmits, to the reception side device, a program determined to be executable by the reception side device. It is characterized by. According to this configuration, the receiving device transmits the receiving device information regarding the available resources to the transmitting device together with the download request, and the transmitting device refers to the receiving device information and transmits the requested program to the receiving device. Since it is determined whether the program can be executed on the device and the program is downloaded only when possible, no meaningless download processing is performed.

The download system of the present invention
What is claimed is: 1. A download system comprising: a receiving device that receives and executes a program; and a transmission device that transmits the program to the receiving device, wherein the receiving device uses a program execution resource included in the receiving device. Information generating means for generating receiving-side device information indicating a request, and request transmitting means for transmitting a download request including identification information indicating a program to be downloaded and receiving-side device information generated by the information generating means to the transmission source device. And a program receiving means for receiving a program transmitted by the transmission source device in response to the download request, wherein the transmission source device implements, for each piece of identification information, a basic part of a function realized. Holds multiple programs in the form of associating multiple programs with the same content but different resources required for execution Program holding means, resource information holding means for holding required resource information indicating resources required for execution for each of the plurality of programs, and request reception for receiving the download request transmitted from the receiving side device Means, for each of a plurality of programs corresponding to the identification information included in the download request received by the request receiving means, based on required resource information relating to the program and receiving side device information received by the request receiving means. Determining means for determining whether or not the receiving apparatus can be executed, and a program transmitting means for transmitting to the receiving apparatus a program determined to be executable by the receiving apparatus by the determining means,
).

According to this, any one of the plurality of programs held by the transmission source device is likely to be executable by the reception side device, so that the program cannot be downloaded to the reception side device due to lack of resources. The situation itself is less likely to occur. Further, when there are a plurality of programs that can be executed in the receiving device, the determining unit selects one, and the program transmitting unit transmits the program selected by the determining unit to the receiving device.
With such a configuration, the same effect can be realized. Further, the program transmission means, if the result of the determination by the determination means indicates that there are a plurality of executable programs in the receiving side device, each of the executable programs has a characteristic at the time of execution. Transmitting information to the receiving device, transmitting a program corresponding to the selection result transmitted from the receiving device to the receiving device, and receiving the program from the program transmitting unit. The apparatus further comprises: a selection reception unit that presents the feature information to the user and causes the user to select one of the selection information units, and a selection result notification unit that notifies the transmission source device of a selection result received by the selection reception unit. It can also be set as the structure. According to this, in addition to realizing the above-described effects, when there are a plurality of programs that can be downloaded on demand, it is possible to select a program according to the user's intention.

The download system of the present invention
A download system comprising a receiving device for receiving and executing a program and a transmitting device for transmitting the program to the receiving device, wherein the transmitting device holds one or more programs in association with respective identification information. A resource data holding unit for holding resource data defining resources necessary for execution of each of the one or more programs, and a resource data request or program transmitted from the receiving side device. Request accepting means for accepting a request, and reading resource data corresponding to the identification information included in the resource data request accepted by the request accepting means from the resource data holding means and transmitting the resource data to the receiving side device; or A program corresponding to the identification information included in the program request accepted by the program Transmission means for reading from the holding means and transmitting the read data to the reception side apparatus, wherein the reception side apparatus transmits a resource data request including identification information indicating a program to be downloaded to the transmission source apparatus. Transmitting means, resource data receiving means for receiving the resource data transmitted by the transmission source apparatus in response to the resource data request, and execution of the program to be downloaded on the receiving apparatus using the resource data. Determining means for determining whether or not the program is executable; second request transmitting means for transmitting a program request including identification information indicating the program to be downloaded to the transmission source device when the determining means determines that the program is executable; And a program receiving means for receiving a program transmitted by the transmission source device in response to a program request. It can also be.

In this configuration, in addition to avoiding unnecessary download processing, the possibility of executing the program is determined by the receiving apparatus, so that the load on the transmission source apparatus is reduced. Even when requests are concentrated, the download process is performed without delay. Further, in the download system, the resource data held by the resource data holding unit is a resource acquisition script for acquiring a resource necessary for executing a corresponding program, and the determination unit includes the resource acquisition script. May be determined on the basis of the result of the temporary execution of the program to be downloaded by the receiving device.

In this case, it is possible to determine whether or not the program can be executed by performing a part of the resource acquisition process included in the program execution process. Therefore, in addition to the above effects, an effect that the procedure of the determination process can be simplified can be obtained. The download system according to the present invention is a download system including a receiving device that receives and executes a program, and a transmitting device that transmits the program to the receiving device, wherein the transmitting device includes one or more programs. And a program holding unit that holds each of the at least one program in association with the identification information, and for each of the one or more programs, the receiving-side apparatus determines a device function or a built-in program function required of the receiving side as a precondition for execution. Inspection script holding means for holding an inspection script for checking whether or not the request is provided, request receiving means for receiving an inspection script request or a program request transmitted from the receiving side device, and inspection received by the request receiving means Before the inspection script corresponding to the identification information included in the script request Transmission means for reading from an inspection script holding means and transmitting to the receiving side apparatus, or for reading out a program corresponding to identification information included in a program request received by the request receiving means from the program holding means and transmitting to the receiving side apparatus And a first request transmission unit that transmits an inspection script request including identification information indicating a program to be downloaded to the transmission source device, and the transmission unit transmits the inspection script request in response to the inspection script request. An inspection script receiving means for receiving the inspection script transmitted by the original apparatus; and executing the inspection script received by the inspection script receiving means, and executing the program to be downloaded on the receiving side apparatus based on the result. Determining means for determining whether or not execution is possible; and Second request transmission means for transmitting a program request including identification information indicating the program to be downloaded to the transmission source device, and program reception for receiving a program transmitted by the transmission source device in response to the program request And means.

According to this configuration, it is possible to prevent unnecessary download processing of a program that cannot be executed due to lack of device functions and program functions in the receiving apparatus. Further, since the determination process is performed by executing a script, it is not necessary to collect information on device functions and program functions on the receiving device and send it to the transmission source device, so that the load of the determination process is light.

Note that the effects described above can also be realized by one of the transmission source device and the reception side device constituting the download system. For example, for the effect of preventing meaningless download processing, the receiving apparatus in a download system including a receiving apparatus that receives and executes a program and a transmitting apparatus that transmits a program to the receiving apparatus is used. Information generating means for generating receiving apparatus information indicating a use state of a program execution resource possessed by the receiving apparatus; identification information indicating a program to be downloaded; and receiving apparatus information generated by the information generating means. A request transmission unit that transmits a download request to the transmission source device, and a program reception unit that receives a program transmitted by the transmission source device in response to the download request, or A receiving device that receives and executes a program, and a sending device that transmits the program to the receiving device. A transmission source device in a download system including a source device, a program holding unit configured to hold one or more programs in association with identification information, and a resource required for execution for each of the one or more programs. Resource information holding means for holding the required resource information shown, request receiving means for receiving the download request transmitted from the receiving side device, and a program indicated by identification information included in the download request received by the request receiving means Determining means for determining whether or not the receiving device can execute the program indicated by the identification information included in the download request from the necessary resource information and the receiving device information included in the download request; and A program determined by the determination means to be executable in the receiving device A program transmitting means for transmitting to the receiving device, can be realized by the source device, the transmission of having.

In the above-mentioned transmission apparatus, the transmission apparatus may further comprise a reception apparatus for receiving and executing a program, and a transmission apparatus for transmitting the program to the reception apparatus. For each piece of information, the basic part of the function to be realized is the same,
Moreover, a program holding unit that holds a plurality of programs in a form that associates a plurality of programs with different contents of resources required for execution, and necessary resource information indicating resources required for execution for each of the plurality of programs. Holding resource information holding means, request receiving means for receiving a download request transmitted from the receiving side device, and each of a plurality of programs corresponding to identification information included in the download request received by the request receiving means Based on the required resource information relating to the program and the receiving device information received by the request receiving unit,
The receiving device determines whether or not it can be executed, and when there are a plurality of programs that can be executed in the receiving device, the determining unit that selects one, and the program that is selected by the determining unit If there is a program transmission means for transmitting the program to the receiving side device, it becomes difficult for a situation in which downloading becomes impossible.

[0135] The above-mentioned receiving apparatus is a download system comprising a receiving apparatus for receiving and executing a program and a transmitting apparatus for transmitting the program to the receiving apparatus. A download system in which a basic system of functions to be realized is the same for each piece of information, and the programs are stored in a form in which a plurality of programs having different contents of resources required for execution are associated with each other; An information generating means for generating receiving apparatus information indicating a use state of a program execution resource of the receiving apparatus, identification information indicating a program to be downloaded, and a receiving side generated by the information generating means. Request transmission means for transmitting a download request including device information to the transmission source device; Receiving, from the transmission source device, characteristic information indicating characteristics at the time of execution of a plurality of programs associated with the identification information included in the request, and presenting the characteristic information to the user, and prompting the user to select one of them. A selection receiving unit, a selection result notifying unit that transmits the selection result received by the selection receiving unit to the transmission source device, and a program corresponding to the selection result transmitted by the selection result transmission unit is received from the transmission source device. If a program receiving unit is provided, it becomes difficult for a situation in which downloading becomes impossible to occur, and when there are a plurality of programs that can be downloaded, it is possible to select a program according to the user's intention.

In order to determine whether or not download processing can be performed in a form in which the load on the transmission source device is reduced, the reception side device that receives and executes a program and the transmission side that transmits the program to the reception side device are determined for the reception side device. A first request transmission unit for transmitting a resource data request including identification information indicating a program to be downloaded to the transmission source device, the reception side device in a download system comprising: Resource data receiving means for receiving the resource data transmitted by the transmission source device, determining means for determining whether or not the program to be downloaded can be executed on the receiving side device using the resource data; When the means is determined to be executable,
Second request transmission means for transmitting a program request including identification information indicating the program to be downloaded to the transmission source device, and program reception for receiving a program transmitted by the transmission source device in response to the program request Means for the transmission source device in a download system comprising a reception device for receiving and executing a program and a transmission device for transmitting the program to the reception device with respect to the transmission device. Program holding means for holding one or more programs in association with identification information, resource data holding means for holding resource data defining resources required for execution of each of the one or more programs, Accepts resource data requests or program requests transmitted from the receiving device A request receiving unit, and reads out the resource data corresponding to the identification information included in the resource data request received by the request receiving unit from the resource data holding unit and transmits the resource data to the receiving side device, or the request receiving unit receives the resource data. Transmitting means for reading out a program corresponding to the identification information included in the program request from the program holding means and transmitting the program to the receiving side device.

Further, in addition to the above, the determination means may determine whether or not the download target program can be executed on the receiving side device based on a result of the provisional execution of the resource acquisition script. By making the resource data held by the resource data holding means of the transmission source device a resource acquisition script for acquiring resources required for executing the corresponding program, the procedure of the determination process can be simplified. .

[0138] The receiving side device in the download system comprising a receiving side device for receiving and executing a program and a transmission source device for transmitting the program to the receiving side device, wherein the program to be downloaded is First request transmission means for transmitting an inspection script request including identification information indicating the following to the transmission source device;
Inspection script receiving means for receiving the inspection script transmitted by the transmission source device in response to the inspection script request, and executing the inspection script received by the inspection script receiving means, based on the result, the download target of the Determining means for determining whether or not the program can be executed by the receiving device; and transmitting a program request including identification information indicating the program to be downloaded to the transmission source device when the determining means determines that the program is executable. And a program receiving means for receiving a program transmitted by the transmission source device in response to the program request, or receiving and executing a program with respect to the transmission source device. Download comprising a receiving device and a source device for transmitting a program to the receiving device The transmission source device in the system, the program holding means holding one or more programs in association with identification information, and the reception side is required for the one or more programs as a precondition for execution Inspection script holding means for holding an inspection script for inspecting whether or not the receiving device has the function of the device or the function of the built-in program, and an inspection script request or a program request transmitted from the receiving device. Request receiving means for receiving;
An inspection script corresponding to the identification information included in the inspection script request received by the request reception unit is read from the inspection script holding unit and transmitted to the receiving side device, or included in the program request received by the request reception unit. And transmitting means for reading out the program corresponding to the identification information from the program holding means and transmitting the program to the receiving side device, so that programs which cannot be executed due to lack of device functions or program functions are wasted. Download processing can be prevented.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a download system according to a first embodiment of the present invention.

FIG. 2 is a sequence diagram showing a procedure of a download process and a flow of information accompanying the download process in the embodiment.

FIG. 3 is a diagram showing a resource management table and an example of resource management information stored therein in the embodiment.

FIG. 4 is a diagram showing a configuration of a storage area management table and an example of storage area information stored therein in the embodiment.

FIG. 5 is a diagram showing an example of a configuration and contents of a download request according to the embodiment.

FIG. 6 is a diagram showing an example of the configuration and contents of a program management table in the embodiment.

FIG. 7 shows an example of the configuration and contents of used resource information according to the embodiment.

FIG. 8 is a diagram showing an outline of contents of system request information in the embodiment.

FIG. 9 is a diagram showing an example of the configuration and contents of allocation information according to the embodiment.

FIG. 10 is a diagram showing an example of a configuration and contents of program information according to the embodiment.

FIG. 11 is a diagram showing an example of specific contents of program rewriting performed by a rewriting unit in the embodiment.

FIG. 12 is a flowchart showing an operation of the receiving device according to the embodiment.

FIG. 13 is a flowchart showing an operation of the transmission source device in the embodiment.

FIG. 14 is a diagram showing contents of storage area information before and after updating in the embodiment.

FIG. 15 is a diagram showing contents of a resource management table before and after updating in the embodiment.

FIG. 16 is a block diagram showing a configuration of a download system according to a second embodiment of the present invention.

FIG. 17 is a diagram showing a configuration and an example of contents of a program management table in the embodiment.

FIG. 18 shows used resource information on three types of programs held by the transmission source device in the embodiment.

FIG. 19 is a block diagram showing a configuration of a download system according to a third embodiment of the present invention.

FIG. 20 is a sequence diagram showing a procedure of download processing and a flow of information accompanying the download processing in the embodiment.

FIG. 21 is a diagram showing an example of a configuration and contents of used resource information according to the embodiment.

FIG. 22 is a diagram showing an example of the structure and contents of program information according to the embodiment.

FIG. 23 is a diagram showing an example of a program selection screen displayed by the interface unit in the embodiment.

FIG. 24 is a block diagram showing a configuration of a download system according to a fourth embodiment of the present invention.

FIG. 25 is a sequence diagram showing a procedure of a download process and a flow of information accompanying the download process in the embodiment.

FIG. 26 is a diagram showing a specific example of a resource script in the embodiment.

FIG. 27 is a diagram showing a configuration and an example of contents of a resource information table in the embodiment.

FIG. 28 is a diagram showing an example of rewriting a download program in the embodiment.

FIG. 29 is a flowchart showing the operation of the receiving device according to the embodiment.

FIG. 30 is a flowchart showing an operation of the transmission source device in the embodiment.

FIG. 31 is a block diagram illustrating a configuration of a download system according to a fifth embodiment of the present invention.

FIG. 32 is a diagram showing a specific example of an inspection script in the embodiment.

FIG. 33 is a diagram showing an example of a program to be inspected in the embodiment.

[Explanation of symbols]

1, 2, 3, 4, 5 Download system 10, 210, 1910, 2410, 3110 Source device 11, 211 Request receiving unit 12, 212, 2412, 3112 Search unit 13, 213 Judgment unit 14 Rewrite unit 15, 315 Program Transmission unit 16 Storage unit 313 Selection unit 20, 320, 2420, 3120 Reception side device 21, 321, 221 Interface unit 22 Receiving device information generation unit 23, 2422, 3122 Request transmission unit 24, 324, 2424, 3124 Program reception unit 2423 Script temporary execution unit 2425 Resource final acquisition unit 2427 Program storage area acquisition unit 2428 Rewriting unit 25 Resource acquisition unit 26 System request issuing unit 27 Storage unit 3121 Inspection script execution unit

Claims (17)

[Claims] 1. A download system comprising a receiving device that receives and executes a program and a transmission device that transmits the program to the receiving device, wherein the receiving device executes a program included in the receiving device. Information generating means for generating receiving-side device information indicating the use status of resources for use; and a download request including identification information indicating a program to be downloaded and receiving-side device information generated by the information generating means to the transmission source device. Request transmitting means for transmitting; and program receiving means for receiving a program transmitted by the transmission source device in response to the download request, wherein the transmission source device identifies one or more programs as identification information and A program holding means for holding the information in association with each other; and a resource required for execution for each of the one or more programs. Resource information holding means for holding required resource information; request receiving means for receiving the download request transmitted from the receiving device; and a program indicated by identification information included in the download request received by the request receiving means. Determining means for determining whether or not the receiving device can execute the program indicated by the identification information included in the download request from the necessary resource information and the receiving device information included in the download request; A download system, comprising: a program transmitting unit that transmits, to the receiving side device, a program determined by the determining unit to be executable in the receiving side device. 2. A download system comprising a receiving device for receiving and executing a program and a transmitting device for transmitting the program to the receiving device, wherein the receiving device executes a program included in the receiving device. Information generating means for generating receiving-side device information indicating the use status of resources for use; and a download request including identification information indicating a program to be downloaded and receiving-side device information generated by the information generating means to the transmission source device. Request transmitting means for transmitting; and program receiving means for receiving a program transmitted by the transmission source device in response to the download request, wherein the transmission source device realizes each of the identification information. Multiple programs that have the same basic function, and that differ in the contents of the resources required for execution. Program holding means for holding programs, resource information holding means for holding required resource information indicating resources required for execution for each of the plurality of programs, and the download request transmitted from the receiving device. Request receiving means for receiving, for each of a plurality of programs corresponding to the identification information included in the download request received by the request receiving means, required resource information relating to the program and receiving side device information received by the request receiving means A determination unit that determines whether the program can be executed in the reception-side device, and a program transmission unit that transmits, to the reception-side device, a program determined to be executable in the reception-side device by the determination unit. And a download system. 3. When there are a plurality of executable programs in the receiving device, the determining means selects one program, and the program transmitting means selects the program selected by the determining device in the receiving device. The download system according to claim 2, wherein the download is transmitted to the download system. 4. The program transmission means, if the result of the determination by the determination means indicates that there are a plurality of executable programs in the receiving apparatus, indicates a feature at the time of execution for each of the executable programs. Transmitting characteristic information to the receiving device, transmitting a program corresponding to the selection result transmitted from the receiving device to the receiving device, receiving the program from the program transmitting unit; Selection receiving means for presenting the characteristic information to the user and allowing the user to select one of them, and a selection result notifying means for notifying the transmission source device of the selection result received by the selection receiving means. The download system according to claim 2, wherein: 5. A download system comprising a receiving device for receiving and executing a program and a transmitting device for transmitting the program to the receiving device, wherein the transmitting device identifies one or more programs with identification information, respectively. A resource holding unit that holds resource data that defines resources necessary for execution of each of the one or more programs; and a program that is transmitted from the receiving side device. A request receiving unit that receives a resource data request or a program request, and reads resource data corresponding to the identification information included in the resource data request received by the request receiving unit from the resource data holding unit and transmits the resource data to the receiving device. A program corresponding to the identification information included in the program request received by the request receiving unit. And transmitting means for transmitting the read the receiving device from the program holding means,
A first request transmission unit that transmits a resource data request including identification information indicating a program to be downloaded to the transmission source device, and the transmission source device in response to the resource data request. Resource data receiving means for receiving the transmitted resource data, determining means for using the resource data to determine whether or not the program to be downloaded can be executed on a receiving device, and determining whether the determining means is executable. A second request transmission unit configured to transmit a program request including identification information indicating the download target program to the transmission source device when the determination is made, and a program transmitted by the transmission source device in response to the program request And a program receiving means for receiving the program. 6. The resource data held by the resource data holding means is a resource acquisition script for acquiring resources required for executing a corresponding program, wherein the determination means temporarily executes the resource acquisition script. 6. The download system according to claim 5, wherein it is determined whether or not the program to be downloaded can be executed on the receiving device based on the result. 7. A download system comprising a receiving device for receiving and executing a program and a transmitting device for transmitting the program to the receiving device, wherein the transmitting device identifies one or more programs with identification information. And a program holding unit that holds the function of a device or a function of an embedded program required for the receiving side as a premise of execution for each of the one or more programs. An inspection script holding unit that holds an inspection script for checking whether the inspection script request or the program request transmitted from the receiving side device is received, and a request script receiving unit that receives the inspection script request or the program request transmitted from the receiving side device. The inspection script corresponding to the identification information to be Transmitting means for reading out a program corresponding to the identification information included in the program request received by the request receiving means from the program holding means and transmitting the program to the receiving side apparatus. And a first request transmission unit that transmits an inspection script request including identification information indicating a program to be downloaded to the transmission source device, wherein the transmission source device transmits the inspection script request in response to the inspection script request. An inspection script receiving unit that receives the inspection script to be executed, and executes the inspection script received by the inspection script receiving unit, and determines whether the download target program can be executed on the receiving side device based on a result of the inspection script. Determining means for performing, when the determining means determines that execution is possible, the download pair A second request transmission unit that transmits a program request including identification information indicating the program to the transmission source device; a program reception unit that receives a program transmitted by the transmission source device in response to the program request; A download system, comprising: 8. The receiving device in a download system comprising a receiving device that receives and executes a program and a transmitting device that transmits the program to the receiving device, wherein the receiving device is used for executing a program. Information generating means for generating receiving apparatus information indicating the use status of resources; transmitting a download request including identification information indicating a program to be downloaded and receiving apparatus information generated by the information generating means to the transmission source apparatus; And a program receiving means for receiving a program transmitted by the transmission source device in response to the download request. 9. A download system comprising a receiving device for receiving and executing a program and a transmitting device for transmitting the program to the receiving device, wherein the transmitting device realizes each of the identification information. The receiving side device in a download system in which a basic system of functions to be performed is the same, and the contents of resources required for execution are stored in a form in which a plurality of programs corresponding to each other are associated with each other; An information generating means for generating receiving apparatus information indicating a use state of a program execution resource possessed by the apparatus; and a download request including identification information indicating a program to be downloaded and receiving apparatus information generated by the information generating means. Request transmission means for transmitting to the transmission source device, and a request transmission means associated with the identification information included in the download request. Selection receiving means for receiving, from the transmission source device, characteristic information indicating characteristics at the time of execution of the plurality of programs obtained, presenting the characteristic information to a user, and allowing the user to select one of the selected information, and the selection receiving means Selection result notifying means for transmitting the received selection result to the transmission source device, and program reception means for receiving, from the transmission source device, a program corresponding to the selection result transmitted by the selection result transmission means, A receiving device. 10. A receiving apparatus in a download system comprising a receiving apparatus for receiving and executing a program and a transmitting apparatus for transmitting the program to the receiving apparatus, wherein identification information indicating a program to be downloaded is provided. First request transmission means for transmitting a resource data request including the resource data request to the transmission source device; resource data reception means for receiving resource data transmitted by the transmission source device in response to the resource data request; Determining means for determining whether or not the download target program can be executed on the receiving side device by using a program request including identification information indicating the download target program when the determination means determines that the download target program can be executed. A second request transmission unit for transmitting to the transmission source device, wherein the transmission source device responds to the program request Having a program receiving means for receiving a signal to come program, a receiving device according to claim. 11. The method according to claim 10, wherein the determination unit determines whether the download target program can be executed on the receiving side device based on a result of the temporary execution of the resource acquisition script. 3. The receiving device according to claim 1. 12. A receiving apparatus in a download system comprising a receiving apparatus for receiving and executing a program and a transmitting apparatus for transmitting the program to the receiving apparatus, wherein identification information indicating a program to be downloaded is provided. First request transmission means for transmitting an inspection script request including the inspection script request to the transmission source device; inspection script reception means for receiving an inspection script transmitted by the transmission source device in response to the inspection script request; Executing a check script received by a receiving unit, determining means for determining whether or not the download target program can be executed in the receiving side device based on a result thereof; and Sending a program request including identification information indicating the program to be downloaded to the transmission source device; Receiving device to the second request transmitting means for transmitting, to have a program receiving means for receiving the program source device comes transmitted in response to the program request, wherein the. 13. The transmission source device in a download system comprising a reception side device for receiving and executing a program and a transmission side device for transmitting the program to the reception side device, wherein each of the one or more programs includes identification information and Program holding means for holding in association with each other; resource information holding means for holding required resource information indicating resources required for execution with respect to each of the one or more programs; and the download request transmitted from the receiving side device Request receiving means for receiving, from the required resource information relating to the program indicated by the identification information included in the download request received by the request receiving means and the receiving side device information included in the download request, the identification included in the download request The receiving device may execute the program indicated by the information. Noh whether determination means, the determination means to have a program transmitting means for transmitting to the receiving device the executable and the determined program at the receiving apparatus, the source apparatus according to claim. 14. The transmission source device in a download system comprising a reception side device for receiving and executing a program and a transmission side device for transmitting the program to the reception side device, wherein each of the identification information is realized. Program holding means for holding a plurality of programs in the form of associating a plurality of programs with the same basic part of the functions to be performed and different from each other in the contents of resources required for execution; and for executing each of the plurality of programs, Resource information holding means for holding required resource information indicating a required resource; request receiving means for receiving a download request transmitted from the receiving side device; and identification information included in the download request received by the request receiving means. For each of a plurality of programs corresponding to Serial requests and based on the receiving unit receiving side apparatus information received, determines whether or not it is possible to run at said receiving device,
When there are a plurality of programs that can be executed in the receiving-side device, there is provided a determining unit that selects one, and a program transmitting unit that transmits the program selected by the determining unit to the receiving-side device. Source device to be characterized. 15. The transmission source device in a download system comprising a reception side device for receiving and executing a program and a transmission side device for transmitting the program to the reception side device, wherein one or more programs are respectively included in identification information. A program holding unit that holds in association with each other; a resource data holding unit that holds resource data that defines a resource required for execution for each of the one or more programs; a resource that is transmitted from the receiving side device A request receiving unit that receives a data request or a program request, and reads resource data corresponding to the identification information included in the resource data request received by the request receiving unit from the resource data holding unit and transmits the resource data to the receiving side device, or A program corresponding to the identification information included in the program request accepted by the request accepting means. And transmitting means for transmitting the read the receiving apparatus the ram from the program holding means,
A transmission source device, comprising: 16. The transmission source according to claim 15, wherein the resource data held by said resource data holding means is a resource acquisition script for acquiring resources required for executing a corresponding program. apparatus. 17. The transmission source device in a download system comprising a reception side device for receiving and executing a program and a transmission side device for transmitting the program to the reception side device, wherein each of the one or more programs is included in identification information. Program holding means held in association with each other, and for each of the one or more programs, whether or not the receiving side device has a device function or a built-in program function required of the receiving side as a prerequisite for execution An inspection script holding unit that holds an inspection script for inspection; a request receiving unit that receives an inspection script request or a program request transmitted from the receiving-side device; and a test script request received by the request receiving unit. An inspection script corresponding to the identification information; Transmitting means for reading from the holding means and transmitting to the receiving apparatus, or reading a program corresponding to the identification information included in the program request received by the request receiving means from the program holding means and transmitting to the receiving apparatus; A transmission source device, comprising: