JP2001034551A - Network device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a network device capable of easily downloading and updating a basic software even when the number of network terminal devices increases. SOLUTION: The basic software stored on a recording medium 109 is transmitted to LANs 101 and 102 through a router 107, the Internet 106, a router 105, an Internet server 104, and a transmission line 103 by operating an operation part 110 of a server 108. Consequently, the basic software is downloaded to network terminal devices connected to the LANs 101 and 102 simultaneously.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a network connection between a server and a plurality of network terminal devices which operate by executing basic software downloaded from the server and which remotely operate software stored in the server. Network device.

[0002]

2. Description of the Related Art Conventionally, a dumb terminal device, a WBT (Wind
A plurality of network terminals such as ows Based Terminal) and NC (Network Computer) and a server are connected to a network, and by remotely operating the network terminal, application software stored in the server is remotely controlled. Thus, a network device configured to execute various processes of application software such as a word processor and a database on the server is used. No application software is stored in the network terminal device, and an OS (Op
Only the minimum software (basic software) required to remotely control the application software of the server via a network, such as an operating system and display software, is stored. The basic software is downloaded from a server and used.

Therefore, these network terminal devices do not require a hard disk or a central processing unit (CPU) capable of high-speed processing, so that not only can the network be constructed at low cost, but also application software and basic software must be updated. , Only the application software stored on the server needs to be updated, etc.
System management is simplified. Therefore, in a network device using these terminal devices, a so-called TCO
(Total Cost of Ownership) can be reduced.

[0004]

However, in the conventional network device, when the basic software is downloaded to each network terminal device, the power supply of each network terminal device is operated by operating each network terminal device individually. Is turned on, a request for downloading basic software is made to the server by operating each network terminal device, and the server responds to the request to download the basic software for the network terminal device stored in the server. It is configured to transmit to a network terminal device. Therefore, when downloading or updating the basic software,
Since it is necessary to operate each network terminal individually, if the number of network terminals increases,
There was a problem that downloading and updating work became extremely complicated.

It is an object of the present invention to provide a network device capable of easily downloading and updating basic software even when the number of network terminal devices increases.

[0006]

According to the present invention, first server means for storing basic software, second server means for storing application software, and basic software downloaded from the first server means. And a plurality of network terminals for remotely operating the application software of the second server means, and downloading the basic software from the first server means to the plurality of network terminals simultaneously. A network device characterized by doing so is provided. Basic software is simultaneously downloaded to the plurality of network terminal devices from the first server means.

Here, the download from the first server means to the plurality of network terminal devices may be performed by multicast via the Internet. Downloading from the first server means to the plurality of network terminal devices may include:
It may be configured to be performed by broadcasting. Further, the first server means is a power control command transmitting means for transmitting a power control command for turning on the power of the network terminal device, and is for controlling the network terminal device to be in a writable state. And a basic software transmitting means for transmitting basic software, wherein the network terminal device includes a storage means for storing basic software, and a power control instruction. Power supply control means for turning on its own power supply in response; write control means for setting the storage means to a writable state in response to the write control command;
Writing means for writing the received basic software into the storage means may be provided.

Further, the storage means may be configured to be able to store a plurality of basic software. The storage unit includes a first storage unit that stores the compressed basic software, and a second storage unit that decompresses and stores the basic software stored in the first storage unit. Terminal device may be configured to execute the basic software stored in the second storage means. Further, the first server means and the second server means may be constituted by the same server.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A network device according to an embodiment of the present invention will be described below with reference to the drawings.
In the drawings, the same parts are denoted by the same reference numerals. FIG. 1 is an overall configuration diagram of a network device according to a first embodiment of the present invention, and shows an example of a network device using the Internet. In FIG.
A plurality of LANs (Local Area Networks) 101, 102
Is connected to the transmission line 103, and the Internet server 104, the router 105, and the Internet 10
6. Connected to a server 108 as first server means via a router 107. The server 108 includes an operation unit 11 as an operation unit including a keyboard and the like.
0, a display unit 111 constituted by a CRT (Cathode Ray Tube) or the like, and a recording medium 109 constituted by a hard disk or the like. As will be described later, the recording medium 109 stores five types of basic software used in the network terminal device. Server 108
The storage medium 109 stores the basic software in a state where it is reversibly compressed by a reversible compression method (for example, GZIP).

FIG. 2 is a diagram showing details of the LAN 101 in FIG. 1, and shows an example of a subnetwork using Ethernet. Although a detailed description of the LAN 102 is omitted, similar to the LAN 101, a plurality of servers storing application software and a plurality of network terminal devices are connected to the LAN. In FIG. 2, a transmission line 201 connected to the transmission line 103 via the router 216 has Windows N
T server 202, Unix server 203, Termin
An al server 204 is connected, and an SNA (System Network Architecture) server 205 is connected via a gateway 206. Each of the servers 202 to 205
Operation units 208 to 211 as operation means constituted by a keyboard and the like, recording media 212 to 215 constituted by a hard disk and the like, and a display unit (not shown) are provided. Each of the recording media 212 to 215 has a word processor. And various application software such as a database or business software.
Each of the servers 202 to 205 constitutes second server means.

On the other hand, a plurality of network terminal devices 207a to 207n are connected to the transmission line 201. Each of the network terminal devices 207a to 207n
It has the same hardware configuration as described later.
Further, these network terminal devices 207a to 207a
7n does not store application software such as word processor software, database software, or business software, but is configured to be able to store a plurality of different types of basic software. Here, the basic software is software stored and used in the network terminal devices 207a to 207n, such as one type of OS and display software connected to the servers 202 to 205 via the transmission line 201. , The minimum software required to remotely operate various application software stored in the servers 202 to 205. In addition, the basic software includes network terminal devices 207a to 207.
n memory capacity and each network terminal device 207a-
In consideration of the convenience at the time of using 207n, it is possible to appropriately select according to the system configuration, the convenience of use, and the like, such as adding other software.

FIG. 3 shows a network terminal device 207a.
207n is a detailed block diagram of FIG. The hardware of each of the network terminal devices 207a to 207n is the same, and FIG.
7a is representatively shown. Network terminal device 2
Reference numeral 07a denotes a LAN board 301, a central processing unit (CPU) 302 constituting execution means and the like, and a DRAM (Dynamic Random Access) constituting storage means as second storage means.
Memory) 303, a non-volatile memory (for example, a flash memory) 30 constituting a storage unit as a first storage unit
4, an operation unit 305 constituted by a keyboard and a mouse and constituting an execution unit, and a display unit 306 constituted by a CRT and the like as a display unit.
The board 301 is connected to the transmission line 201.

Here, since the DRAM 303 is used as a main memory, a high-speed memory having a short access time is used. On the other hand, the flash memory 304
Is used as a memory for storing a plurality of basic software, so that an access time as short as that of the DRAM 303 is not required. Therefore, other storage means capable of high-speed processing may be used instead of the DRAM 303. The flash memory is convenient in that the basic software can be stored even when the power is turned off. However, if a backup power supply is used, other storage means having a relatively low speed can be used. Is also possible. Note that the network terminal device 207a itself does not perform the processing of the application software, and the server 202 is remotely operated.
Since the application software is operated on the side of the network device 205 to 205, the network terminal device 207a does not have a hard disk for storing the application software.

FIG. 4 is a diagram showing a memory map of the flash memory 304. The flash memory 304 has a storage area in which the loader 401 and the file table 402 are stored, and a storage area in which a plurality of basic software for the network terminal device 207a is stored. The loader 401 causes the display unit 306 to display a function constituting an execution unit for executing the basic software, a function of checking the file table 402 in the flash memory 304, a name of the basic software described in the file table 402, and the like. Function, a function to select a startup file, a function to individually delete the basic software stored in the flash memory 304, and a function to decompress the basic software stored in the flash memory 304 to DRA
M303 is constituted by software having a function as a decompression unit to be stored in the M303, a function to format the flash memory 304, a function to download basic software as described later, and the like.
This is realized by executing in U302.

FIG. 4 shows an example in which five types of basic software are stored in a storage area in which the basic software is stored. As the five types of network terminal device basic software, WBT basic software 40 is used.
3, an X terminal basic software 404, a Linux terminal basic software 405, an IBM 3270 terminal basic software 406, and a Java terminal basic software 407 are stored. The WBT basic software 403 is composed of Windows CE and RDP software.
Reference numeral 4 denotes a Linux kernel and X Window software. The Linux terminal basic software 405 comprises a Linux kernel and an NFS (Network File System) protocol for connecting to a server. Reference numeral 406 denotes the display software for Windows CE and 3270, and
The va terminal basic software 407 includes a kernel, virtual machine (VM) software, and an applet.

Each of the network terminal devices 207a to 207a
It is not always necessary to store all five types of basic software as shown in FIG. 4 in 207n, and one or more types of basic software that may be used may be appropriately selected as necessary and stored. It is good. FIG.
The storage medium 109 of the server 108 stores all types of basic software used in each of the network terminal devices 202 to 205. In this example, all of the five types of basic software are stored.

FIG. 5 shows a case where the basic software is downloaded from the recording medium 109 of the server 108 to each of the network terminal devices 207a to 207n. IP (Inte
FIG. 3 is a diagram showing a (rnet Protocol) packet. Server 10
8 is an example of a multicast packet used to control the power of the network terminal devices 207a to 207n in the power off state to the on state by multicast and then download the basic software to each of the network terminal devices 207a to 207n. Is shown.

FIG. 6 shows a case where the basic software stored in the recording medium 109 is transmitted from the server 108 to each of the network terminal devices 207a to 207n. It is a display screen displayed. FIG. 7 is a flowchart showing a process of the server 108 when the basic software is downloaded to the network terminal devices 207a to 207n. FIG. 8 is a flowchart showing the processing of each of the network terminal devices 207a to 207n when the basic software is downloaded to the network terminal devices 207a to 207n, and is executed by the CPU 302 based on the program of the loader 401.

Next, the server 108 will be described with reference to FIGS.
The operation when the basic software is selected and downloaded to each of the network terminal devices 207a to 207n will be described. As an initial state, each of the network terminal devices 207a to 207n is in a sleep state (LA
It is assumed that signals can be received via the N board 301 but the operation is stopped for power saving).

First, when the operation mode is shifted to the transmission mode by operating the operation unit 110 of the server 108, the server 10
The selection screen of FIG. 6 is displayed on the display unit 111 of FIG. 8 (step S701 of FIG. 7). Server 1 is displayed on the selection screen.
A list of all basic software stored in the recording medium 109 is displayed. That is, in this example, WBT (basic software for WBT),
X (basic software for X terminals), LINUX (Lin
UX terminal basic software), 3270 (IBM 3270 terminal basic software) and JAVA (Ja
va terminal basic software) are displayed together with the numbers.

By operating the operation unit 110 in this state, each of the network terminal devices 207a to 207n is operated.
Select the basic software you want to download. As a selection method, a method of inputting a number displayed on the left of the basic software from the operation unit 110, a method of selecting with a mouse, and the like can be adopted. For example, by inputting the number 1, the basic software for WBT is selected. The server 108 determines that the basic software has been selected (step S702), transmits the multicast packet shown in FIG. 5 (step S703), and then transmits the basic software stored in the recording medium 109 (step S703). S704). In step S703, a power control command transmitting unit that transmits a power control command for turning on the power of the network terminal devices 207a to 207n, and a command for controlling the network terminal devices 207a to 207n to a writable state. Write control command transmitting means for transmitting the write control command. Step S704 constitutes basic software transmission means for transmitting the basic software to each of the network terminal devices 207a to 207n. Further, step S701
Step S704 constitutes a download unit for downloading the basic software to the network terminal devices 207a to 207n.

At this time, a multicast address is set as a destination address of the IP packet so that the IP packet and the basic software are simultaneously transmitted to each of the network terminal devices 207a to 207n by multicast. In the data area of FIG. 5, a power control command for turning on the power of each of the network terminal devices 207a to 207n and a write control command for shifting each of the network terminal devices 207a to 207n to the write state. Is set. The IP packet is
This is a multicast packet in which a write control command is added to a magic packet for turning on the power of each of the terminal devices 207a to 207n by Wake Up On LAN. The IP packet is sent to the router 107 and the Internet 10
6. The data is simultaneously transmitted to the LAN 101 and the LAN 102 via the router 105 and the Internet server 104.

On the LAN 101 side, the IP packet is transmitted to each network terminal device 207 via the router 216.
Upon arrival at a to 207n, the network terminal devices 207a to 207n decrypt the IP packet. It is determined that the power control command has been received (step S801 in FIG. 8), and the self power is turned on from the sleep state in response to the power control command (step S802). Steps S801 and S802 constitute a power control unit. Further, it is determined that the write control command of the IP packet has been received (step S803), and in response to the write control signal, the flash memory 304 is shifted to a writable state to be in a writable state. (Step S804). Steps S803 and S804 constitute a write control unit. Next, the source IP address is decrypted, and it is determined whether or not the signal is from a legitimate server 108 (step S805). Step S805 constitutes server determination means. If the signal is not a signal from the legitimate server 108, the power is turned off and the process is terminated (step S808). Step S808 constitutes power-off means. Thereby, it is possible to prevent the basic software of the flash memory 304 from being inadvertently rewritten by incorrect software or data.

On the other hand, if it is determined in step S805 that the signal is from a legitimate server, each of the network terminal devices 207a to 207n receives the basic software from the server 108 following the IP packet, and Flash memory 3 as designated storage means
04 (step S806). Each of the network terminal devices 207a to 207n determines that the storage of the basic software has been completed (step S80).
7) Turn off its own power (step S808),
Complete the download process. Steps S806 and S807 constitute a writing unit. Steps S801 to S808 constitute storage means for downloading the basic software and storing it in the flash memory 304. Note that it is also possible to configure so that the process of step S805 is performed before step S801. In this case, first, before step S801, the destination IP address is decrypted, and it is determined whether or not the received IP packet is from the legitimate server 108. If the received IP packet is from the legitimate server, the process proceeds to step S801. S80
The following processing is performed. Further, when downloading a plurality of basic software, it can be performed by repeating the processing operations of FIG. 7 and FIG. LA
In N102, the same operation as that of the LAN 101 is performed, and the download process is performed.

FIGS. 9 and 10 show IP packets used in the second embodiment of the present invention.
An IP packet (magic packet) in which a power control command for turning on the power supply of each of the terminal devices 07a to 207n from an off state to an on state, and a write control command for shifting each of the terminal devices 207a to 207n to a writable state. Set IP
Using two IP packets of packets, the server 10
8 is an example of a case of downloading from N.8 to network terminal devices 207a to 207n. This is an effective method when the processing of the network terminal devices 207a to 207n is slow and cannot be processed when both the power control command and the write control command are set in one IP packet.

FIG. 11 shows the second embodiment.
The basic software is transferred to the network terminal device 207a-
It is a flowchart which shows the process of the server 108 at the time of downloading to 207n. The difference between the second embodiment and the first embodiment lies in the portions shown in FIGS. 9 to 11, and therefore, the following description will focus on the differences. Regarding the processing of the network terminal devices 207a to 207n, since the power control command and the write control command are both included in one IP packet in the first embodiment, the analysis processing of this portion is detailed. However, since the overall flow is the same as in FIG. 8, the description will be made with reference to FIG.

First, by operating the operation unit 110 of the server 108, the selection screen of FIG. 6 is displayed and the selection mode is entered (step S1101 of FIG. 11). When desired basic software is selected (step S1102), The IP packet shown in FIG. 9 is transmitted from the server 108 (step S1103). After a predetermined time has elapsed, the IP packet of FIG. 10 is transmitted (step S1104), and after a predetermined time has elapsed, the basic software is transmitted (step S110).
5). At this time, the IP packets and the basic software of FIGS. 9 and 10 are transmitted by multicast,
Each is transmitted to the LAN 101 and the LAN 102 via the router 107, the Internet 106, the router 105, and the Internet server 104 at predetermined time intervals.
Step S1103 is performed in the network terminal device 20.
A power control command transmitting unit for transmitting a power control command for turning on the power of the power supply units 7a to 207n;
Reference numeral 1104 denotes network terminal devices 207a to 207n.
A write control command transmitting means for transmitting a write control command for controlling the writing into a writable state;
Reference numeral 5 denotes basic software transmission means.

On the other hand, on the LAN 101 side, when each of the network terminal devices 207a to 207n receives the IP packet of FIG. 9 (step S801), it turns on its own power in response to the power control command included in the IP packet. (Step S802). Next, each of the network terminal devices 207a to 207n receives the IP packet in which the write control command of FIG.
803) In response to the write control command, the flash memory 304 is made writable and enters a writable state (step S804).

Next, each network terminal device 207a
To 207n receive the basic software from the server 108 and sequentially store the basic software in the flash memory 304 (step S806). Each network terminal device 207a-2
When the storage of the basic software is completed (step S807), 07n turns off its power and completes the download process (step S808). In addition, LAN1
02, the same operation as that of the LAN 101 is performed.
Download processing is performed.

FIG. 12 is an overall configuration diagram of a network device according to the third embodiment of the present invention, and shows an example in which downloading is performed inside a LAN using Ethernet. In FIG. 12, a transmission line 201 has Win
dows NT server 202, Unix server 203,
The terminal server 204 is connected, and the SNA (System Network Architect) is connected via the gateway 206.
ure) The server 205 is connected. Each server 202
205 to 205 are provided with operation units 208 to 211 as operation means constituted by a keyboard and the like, recording media 212 to 215 constituted by a hard disk and the like, and display units (not shown). Stores various application software such as a word processor, a database, and business software. Each of the servers 202 to 205 constitutes second server means. Also, the transmission line 201 includes:
A plurality of network terminal devices 207a to 207n are connected. On the other hand, the transmission line 201 has an operation unit 120 as an operation means constituted by a keyboard or the like.
2. A display unit 1204 as a display unit constituted by a CRT or the like and a server 1201 having a recording medium 1203 constituted by a hard disk or the like are connected. The recording medium 1203 includes a plurality of basic software,
For example, the five types of basic software are stored.

Also in the third embodiment, the server 1
The basic software stored in the recording medium 1203 is downloaded to each of the network terminal devices 207a to 207n, and basically operates in the same manner as the first and second embodiments. The third embodiment is different from the third embodiment in that a broadcast packet is used as an IP packet including a power control command and a write control command for downloading within the LAN shown in FIG. That is, in the third embodiment, FIG.
A broadcast address is set as the destination IP address of the IP packet shown in FIGS. As a result, similarly to the first and second embodiments, the network terminal devices 207a to 207a-2
07n, the basic software stored in the recording medium 1203 can be downloaded all at once. By using a broadcast packet in this way, it becomes possible for a network device connected to a plurality of sub-networks to perform a download process for each subnet without affecting other sub-networks.

The basic software downloaded to the network terminal devices 207a to 207n as described above is stored in the flash memory 304 in a compressed state. Also, the program of the loader 401 is
By executing in step 2, the name, start address, and size of the basic software stored in the flash memory 304 are described in the file table 402 in the flash memory 304. Terminal device 207 for each network
In a to 207n, the user operates the operation unit 305 to select desired basic software stored in the flash memory 304, thereby executing the basic software. Thus, the application software of the servers 202 to 205 corresponding to the basic software can be executed by remote control.

In each of the above embodiments, the downloading is performed when the network terminal devices 207a to 207n are in the sleep state. However, when the power is on, the network terminal devices 207a to 207n are downloaded.
Executes the basic software stored in the DRAM 303, the loader 4 of the flash memory 304
By setting the download destination in the flash memory 304 as the program 01, the basic software can be downloaded to the flash memory 304 of each of the network terminal devices 207a to 207n even when the power is on. is there. Further, in each of the above embodiments, the server storing the basic software and the server storing the application software are configured by different servers, but they may be configured by the same single server.

As described above, the network device according to the embodiment of the present invention has the first server means (servers 108 and 1201) for storing the basic software and the second server means (servers for storing the application software). Servers 202 to 205), and a plurality of network terminal devices 207a to 207n that operate by the downloaded basic software and remotely control the application software, and the download means of the first server means (steps S701 to S701). The basic software downloaded in step S704) is transferred to the network terminal device 207a to 207a.
7n (steps S801 to S80)
8), the data is stored in the flash memory 304. That is, the basic software is simultaneously downloaded from the first server means to the plurality of network terminal devices 207a to 207n in the sleep state. Therefore, even when the number of network terminal devices 207a to 207n increases, it is possible to provide a network device that can easily download and update the basic software.

Further, the download from the first server means 108 to the plurality of network terminal devices 207a to 207n is configured to be performed by multicast via the Internet using multicast packets. Therefore, even in a network device constituted by a plurality of sub-networks, it is possible to simultaneously download to a plurality of network terminal devices 207a to 207n. By using a magic packet in which a power control command is set in the multicast packet, it is possible to simultaneously download to the network terminal devices 207a to 207n in the sleep state. Further, the first server means 1201 sends a plurality of network terminal devices 207a.
The download to 207n is performed by broadcast using a broadcast packet. Therefore, downloading can be easily performed without affecting other sub-networks. In addition, by using a magic packet in which a power control command is set in a broadcast packet, the network terminal device 20 in the sleep state is used.
7a to 207n can be downloaded all at once.

Further, first server means (servers 108 and 1201) for storing basic software, second server means (servers 202 to 205) for storing application software, and download from the first server means A plurality of network terminal devices 2 operated by the basic software and remotely controlling the application software of the second server means.
07a to 207n, wherein the first server means comprises:
Network terminal devices 207a to 207 in the sleep state
A power control command transmitting unit (step S703, step S1103) for transmitting a power control command for turning on the power of the 207n;
Write control command transmitting means for transmitting a write control command for controlling 207n to a writable state (step S703,
Step S1104) and basic software transmission means (Step S704, Step S1105) for transmitting basic software, while the network terminal devices 207a to 207n include storage means (flash memory 304) for storing basic software, Power control means for turning on its own power from the sleep state in response to the power control command (steps S801, S80
2), write control means (steps S803 and S804) for setting the storage means in a writable state in response to the write control command, and writing means for writing the received basic software into the storage means (Step S806, Step S807). This makes it possible to easily download with a simple configuration.

The flash memory 304 is configured to be able to store a plurality of basic software, so that the network terminal devices 207a to 207n can be used as various terminal devices. Also,
The storage means includes a first storage means (flash memory 304) for storing the compressed basic software;
And a second storage means (DRAM 303) for decompressing and storing the basic software stored in the storage means, and the network terminal devices 207a to 207n execute the basic software stored in the second storage means. Is configured. As a result, the compressed basic software can be downloaded, so that the time required for downloading can be reduced.

The first server means (server 108, 1
201) and second server means (servers 202 to 205)
May be configured by the same server. For example, FIG.
2, the server 1201 is removed and the server 202
To 205 are stored not only application software but also basic software, and the basic software is downloaded from each of the servers 202 to 205 to the network terminal devices 207a to 207n.
07a to 207n may be configured to remotely control application software of the servers 202 to 205. This makes it possible to reduce the number of servers.

According to each of the above embodiments, the first server means (server 10) for storing the basic software.
8, 1201), second server means (servers 202 to 205) for storing application software,
A plurality of network terminals 207a to 207n that operate by the basic software downloaded from the first server and remotely control the application software of the second server are connected to the network. A software download method is provided, wherein the plurality of network terminal devices in a sleep state are simultaneously turned on, and the basic software is simultaneously downloaded to the plurality of network terminal devices. . When the plurality of network terminal devices are already powered on, the first server means sends the plurality of network terminal devices to the plurality of network terminal devices without turning on the power of the plurality of network terminal devices again. A software download method is provided wherein software is downloaded all at once.

Here, the download from the first server means to the plurality of network terminal devices can be performed by multicast via the Internet. The download from the first server to the plurality of network terminal devices may be performed by broadcast. Further, when downloading from the first server means to the plurality of network terminal devices,
The basic software may be downloaded in a reversibly compressed state. Incidentally, the first server means and the second server means can be constituted by the same server.

[0041]

According to the present invention, it is possible to easily download and update the basic software even when the number of network terminal devices increases.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a network device according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of a LAN used in the embodiment of the present invention.

FIG. 3 is a block diagram of a network terminal device used in the embodiment of the present invention.

FIG. 4 is a diagram showing a memory map of a flash memory of the network terminal device used in the embodiment of the present invention.

FIG. 5 is a diagram showing an IP packet used in the first embodiment of the present invention.

FIG. 6 is a diagram showing a display screen of a server used in the first embodiment of the present invention.

FIG. 7 is a flowchart illustrating processing of a server used in the first embodiment of the present invention.

FIG. 8 is a flowchart showing processing of a network terminal device used in the first embodiment of the present invention.

FIG. 9 is a diagram showing an IP packet used in the second embodiment of the present invention.

FIG. 10 shows an IP used in the second embodiment of the present invention.
It is a figure showing a packet.

FIG. 11 is a flowchart illustrating processing of a server used in the second embodiment of the present invention.

FIG. 12 is an overall configuration diagram of a network device according to a third embodiment of the present invention.

[Explanation of symbols]

 101, 102 ... LAN 103, 201 ... transmission line 106 ... Internet 108, 202 to 205, 1201 ... server 110, 208 to 211, 1202 ... operation unit 111, 1204 ... display Units 109, 212 to 215, 1203 ... Recording media 207a to 207n ... Network terminal device

[Procedure amendment]

[Submission date] August 18, 2000 (2000.8.1)
8)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5B076 BB02 BB04 BB08 5B089 GA11 GA21 GB09 HA10 JA11 JB07 JB10 KA10 KB09

Claims (7)

[Claims] 1. A first server means for storing basic software, a second server means for storing application software, and the second server means operated by basic software downloaded from the first server means. A plurality of network terminal devices for remotely controlling the application software of claim 1, wherein the basic software is simultaneously downloaded from the first server means to the plurality of network terminal devices. . 2. The network device according to claim 1, wherein the download from the first server to the plurality of network terminal devices is performed by multicast via the Internet. 3. The network device according to claim 1, wherein the download from the first server to the plurality of network terminal devices is performed by broadcast. 4. The power supply control command transmission means for transmitting a power supply control command for turning on the power supply of the network terminal device, and the first server device sets the network terminal device in a writable state. A writing control command transmitting unit for transmitting a writing control command for controlling; a basic software transmitting unit for transmitting basic software; the network terminal device includes a storage unit for storing basic software; Power control means for turning on its own power supply in response to a control command; write control means for setting the storage means to a writable state in response to the write control command; 4. The network device according to claim 1, further comprising a writing unit that writes the data into the unit. 5. The network device according to claim 4, wherein said storage means is configured to be able to store a plurality of basic software. 6. The storage means includes first storage means for storing compressed basic software, and second storage means for decompressing and storing the basic software stored in the first storage means.
Storage means, the network terminal device,
6. The network device according to claim 4, wherein the basic software stored in the second storage unit is executed. 7. The network device according to claim 1, wherein said first server means and said second server means are constituted by the same server.