JP2001285288A - Router, network broadcast system, medium and information assembly - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem of the conventional router where a user cannot have viewed a program when no program is broadcast from a server in the case of viewing an Internet broadcasting by IP multicasting and a program broadcast while the user leaves its seat during the absence of the user. SOLUTION: The router is provided with a network interface 11 that receives data from a network 16, a storage means 15 that stores the received data, a read/write control means 14 that controls write of the data to the storage means 15 and read of the data from the storage means 15, a routing control means 13 that controls transmission of the read data, and a network interface 12 that transmits the data read by the read/write control means 14 to a network 17 under the control of the routing control means 13, and the read/write control means 14 controls reading of data according to an external instruction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of communications (IP) for routing data packets between mutually separated networks in the communication field.
and a router device such as a router.

[0002]

2. Description of the Related Art Conventionally, there has been a router as shown in FIG.

In FIG. 3, reference numeral 30 denotes a conventional router device. 16 and 17 are networks separated from each other by a router device 30. Reference numerals 11 and 12 denote network interfaces. The network interface 11 is connected to a network 16, and the network interface 12 is connected to a network 17, and transmits and receives data packets to and from each network. Three
3 is a routing control means.

[0006] The routing control means 33 sets IP packet routing conditions in advance, and outputs the IP packets received by the network interfaces 11 and 12 to the network interface 11 or 12 according to the set routing conditions. The routing conditions include, for example, a destination IP address and TCP (Transm.
issue Control Protocol) or UDP (User Datagram Protocol)
col) is set by a combination of the port numbers of the packets.

[0005] FIG. 4 is a system configuration diagram of Internet broadcasting using a conventional router device.

In FIG. 4, reference numeral 30 denotes a conventional router device, and reference numeral 18 denotes the Internet. Reference numerals 16 and 17 denote networks separated from each other by a router device 30, and the router device 30 performs routing of IP packets between the two networks. The network 16 is connected to the Internet 18. Reference numeral 22 denotes a server device for broadcasting Internet broadcast programs, which is connected to the Internet 18. Reference numeral 23 denotes a terminal device for viewing Internet broadcasts.
7 is connected.

The operation of the conventional router device 30 and the Internet broadcast system configured as described above will be described.
This will be described below. In particular, a case will be described in which Internet broadcasting is performed from a server device 22 connected to the Internet 18 by IP multicast technology, and a program is viewed on a terminal device 23 connected to the network 17. In the IP multicast technology, the server device 22
Get the multicast group address in advance,
This multicast group address is used as the destination address of the IP packet to be transmitted. Here, the multicast group address used by the server device 22 is ADDRg. The terminal device 23 has previously
It is assumed that DDRg is known.

(1) First, the terminal device 23 requests the router device 30 to register ADDRg, which is a multicast group address of a program to be viewed. The router device 30 sets ADDRg in the routing control means 33.

(2) When the server device 22 performs Internet broadcasting, the server device 22 uses the multicast group address ADDRg as the destination IP address.
Is transmitted to the Internet 18. Normally, since the data broadcast from the server device 22 is larger than the size of the IP packet, the broadcast data is transmitted as an IP packet sequence composed of a plurality of IP packets.

(3) When the network interface 11 of the router device 30 receives the IP packet, it checks whether or not the destination address of the IP packet matches the multicast group address ADDRg set in (1). The IP packet is transmitted to the network 17 via the network interface 12.
Send to

(4) The terminal device 23 connected to the network 17 receives the IP packet transmitted in (3), and thus the user using the terminal device 23 receives the IP packet from the server device 22. The transmitted Internet broadcast program can be viewed.

[0012]

However, when a user wants to view an Internet broadcast program on a terminal device using a conventional router device, when the user is in the middle of watching the program, or when the user is in the middle of the program, There was a problem that the broadcast could not be viewed. In addition, the program cannot be viewed unless the time when the program is broadcast from the server device, and the program cannot be viewed in another time zone.

According to the present invention, it is possible to view an Internet broadcast program even when the time when the program is broadcast from the server device and the time when the program is viewed on the terminal device are different. It is an object of the present invention to provide a router device that allows a user to view a broadcast while the broadcast is being performed.

[0014]

In order to solve this problem, a first invention (corresponding to claim 1) is connected to a first network and receives data from the first network. First network interface means, storage means for storing data received by the first network interface means, write control means for controlling writing of data to the storage means, and data stored in the storage means. Read control means for controlling the reading of data, routing control means for controlling the transmission of the data read by the read control means, and connected to a second network, wherein the read operation is performed under the control of the routing control means. Transmitting the data read by the control means to the second network; And a second network interface means, said read control means is a router device and controls the reading of the data in accordance with an instruction from the outside.

According to a second aspect of the present invention (corresponding to claim 2), the first aspect
Network interface means for receiving data from the first network, storage means for storing data received by the first network interface means, and data to the storage means. Writing control means for controlling writing of data in accordance with an external instruction, reading control means for controlling reading of data stored in the storage means, and controlling transmission of data read by the reading control means. Routing control means, and second network interface means connected to the second network and transmitting data read by the read control means to the second network under the control of the routing control means. The read control means There is a router device and controls the reading of the data in accordance with an instruction from the outside.

According to a third aspect of the present invention (corresponding to claim 3), the routing control means may determine a storage condition of data to be stored in the storage means and a final condition of data output from the second network interface means. Output destination information is set, and all or a part of the data received by the first network interface unit is output to the write control unit and read from the storage unit based on the storage condition. Means for adding the information of the final output destination to the data, wherein the writing control means controls writing to the storage means for data from the routing control means,
When the routing control unit adds the information of the final output destination to the data read by the read control unit, the second network interface unit transmits the data to which the information of the final output destination is added. The router device according to the first or second aspect of the present invention, wherein

According to a fourth aspect of the present invention (corresponding to claim 4), the data received by the first network interface means is a data packet, and the write control means:
An input time measuring unit that measures an input time of each of the data packets input from the routing control unit; and stores the input time measured by the input time measuring unit in association with each of the data packets. Means for storing the data packet, wherein the read control means reads the data packet from the storage means.
The router device according to any one of claims 1 to 3, wherein the input time is also read from the storage unit, and the read and output timing of the data packet is controlled using the input time. is there.

According to a fifth aspect of the present invention (corresponding to claim 5), the data received by the first network interface means is constituted by data packets, and information on the transmission time of each data packet is provided. The added data, wherein the write control means stores the transmission time in the storage means in association with each of the data packets, and the read control means reads the data packet from the storage means Preferably, the transmission time is also read from the storage means, and the read and output timings of the data packet are controlled using the transmission time, according to any one of the first to third aspects of the present invention. It is a router device.

According to a sixth aspect of the present invention (corresponding to claim 6), the data received by the first network interface means is a stream composed of data packets, and the write control means transmits the data from the routing control means. A rate measuring unit for measuring a rate of the input stream is provided, and a rate measured by the rate measuring unit is stored in the storage unit in association with the stream, and the read control unit reads the data from the storage unit. The present invention according to any one of the first to third aspects of the present invention, wherein when reading the stream, the rate is also read from the storage means, and the timing of reading and outputting the stream is controlled using the rate. Router device.

According to a seventh aspect of the present invention (corresponding to claim 7), the data received by the first network interface means is a data packet, and the read control means
A counting unit for indicating a data packet to be read next from the storage unit; controlling reading of the data packet from the storage unit based on a value of the counting unit; The router device according to any one of the first to sixth aspects of the present invention, which changes based on an instruction.

An eighth aspect of the present invention (corresponding to claim 8) is the router according to any one of the third to seventh aspects of the invention, wherein the accumulation condition includes a data destination address. is there.

According to a ninth aspect of the present invention (corresponding to claim 9), there is provided a server device for transmitting data, a first device for receiving data transmitted by the server device, and transmitting all or a part of the received data. To a network broadcast system, comprising: the router device according to any one of the first to eighth aspects of the present invention; and a terminal device that receives and outputs data transmitted by the router device.

According to a tenth aspect of the present invention (corresponding to claim 10),
A medium carrying a program and / or data for causing a computer to execute all or some of the functions of all or part of the router device according to any one of the first to eighth aspects of the present invention, A medium that can be processed by a computer.

According to an eleventh aspect of the present invention (corresponding to claim 11),
Information characterized by being a program and / or data for causing a computer to execute all or a part of functions of all or a part of the router device according to any one of the first to eighth aspects of the present invention. It is an aggregate.

[0025]

Embodiments of the present invention will be described below with reference to FIGS. 1, 2 and 5.

In FIG. 1, reference numeral 10 denotes a router according to an embodiment of the present invention. 16 and 17 are networks separated from each other by the router device 10.
11 and 12 are network interfaces, and the network interface 11 is connected to the network 16;
The network interface 12 is connected to each of the networks 17 and transmits and receives data packets to and from each network. 13 is a routing control means, 1
Reference numeral 4 denotes a read / write control unit. 15 is a storage means,
It is realized by a hard disk, a semiconductor memory, or the like.

The routing control means 13 sets the routing conditions of the IP packets in advance, and converts the IP packets received by the network interfaces 11 and 12 into the network interfaces 11 and 12 or the read / write control means 14 according to the set routing conditions. Output to any of The routing conditions include, for example, the destination I of the received IP packet.
P address, TCP or U carried in IP packet
This is set by a combination of the port numbers of the DP packet.

In the 14 read / write control means, 144
Is an input time measuring means, 141 is a write packet number counter, 142 is a read packet number counter, 14
Reference numeral 3 denotes output control means.

FIG. 2 is a system configuration diagram of Internet broadcasting using the router device according to the embodiment of the present invention.

In FIG. 2, reference numeral 10 denotes a router according to the embodiment of the present invention, and reference numeral 18 denotes the Internet. 1
Reference numerals 6 and 17 denote networks separated from each other by a router device 10, and a network 16 is connected to the Internet 18. Reference numeral 22 denotes a server device for broadcasting Internet broadcast programs.
It is connected to the. Reference numeral 23 denotes a terminal device for viewing Internet broadcasting, which is connected to the network 17.

The operation of the router device 10 and the Internet broadcasting system according to the embodiment of the present invention configured as described above will be described below.

Here, as an example, the Internet 1
A case will be described in which Internet broadcasting is performed by the IP multicast technique from the server device 22 connected to the terminal 8 and the program is viewed on the terminal device 23 connected to the network 17. In the IP multicast technology, the server device 22 acquires a multicast group address in advance and uses the multicast group address as a destination address of an IP packet to be transmitted.
Here, the multicast group address used by the server device 22 is ADDRg. It is assumed that the terminal device 23 knows ADDRg in advance.

(A-1) First, the terminal device 23 requests the router device 10 to register ADDRg, which is a multicast group address of a program to be viewed. The router device 10 sends to the routing control unit 13
It instructs reception of an IP address whose destination address is ADDRg, and at the same time, sets the identifier of the network interface 12 that has received the ADDRg registration request as an output destination when the packet is received.

The write packet number counter 141 and the read packet number counter 142 of the read / write control means 14 are both reset to zero.

(A-2) When the server device 22 starts the Internet broadcast, the server device 22 sets the destination IP address as the multicast group address AD.
The IP packet specifying the DRg is transmitted to the Internet 18
Send to Normally, since the data broadcast from the server device 22 is larger than the size of the IP packet, the broadcast data is transmitted as an IP packet sequence composed of a plurality of IP packets.

(A-3) When the network interface 11 of the router device 10 receives an IP packet, the destination IP address of the IP packet is changed to (a-
It is checked whether or not the address matches the multicast group address ADDRg set in 1).
The packet is passed to the read / write control unit 14.

(A-4) The read / write control means 14 stores the input IP packets in the order of input in the storage means 15
Write to. At this time, the input time measuring means 144 measures the input time at which each IP packet was received from the routing control means 13, and writes the value in the storage means 15 in association with each IP packet. The write packet number counter 141 counts the number of IP packets written in the storage unit 15.

(A-5) The read packet number counter 142 of the read / write control means 14 counts the number of IP packets read from the storage means 15, that is, indicates the number of the next IP packet to be read from the storage means 15. ing. The output control unit 143 reads the IP packet and the data of the input time from the storage unit 15 according to the value of the read packet number counter 142.

The output control means 143 sequentially inputs the read IP packets to the routing control means 13. At this time, the output control means 143 sets each I-packet so that the difference between the input time of each IP packet and the output time output to the routing control means 13 becomes a substantially constant value.
The output timing of the P packet is controlled. By doing so, when transmitting the IP packet read from the storage means 15 to the network 17, the interval between each IP packet is set to a value close to the interval when the router device 10 receives the IP packet from the server device 22. Can be

FIGS. 5 (a) and 5 (a ') show that I is inputted from the routing control means 13 to the read / write control means 14.
The relationship between a P packet and an IP packet output from the read / write control unit 14 to the routing control unit 13 is shown. In the initial state, as shown in the relationship between (a) and (a ′) in FIG.

(A-6) The routing control means 13
The IP packet input from the read / write control unit 14 is
Network interface 1 set in (a-1)
2 to the network 17.

(A-7) The terminal device 23 connected to the network 17 receives the IP packet transmitted in (a-5), and thus the user using the terminal device 23 An Internet broadcast program transmitted from the server device 22 can be viewed.

If the user who is watching the Internet broadcast on the terminal device 23 once stops and wants to watch from the continuation of the program currently being viewed when returning, the following procedure is used.
It issues a pause and resume request to the router device 10.

FIG. 5B shows the state of an IP packet output from the read / write control means 14 to the routing control means 13 in the case of suspending and resuming.

(B-1) The terminal device 23 requests the router device 10 to temporarily stop according to a user's instruction.

(B-2) The router device 10 instructs the read / write control unit 14 to suspend reading, and the output control unit 143 of the read / write control unit 14 reads the IP packet from the storage unit 15. Pause 51.

At this time, the writing of the IP packet to the storage means 15 continues as before.

(B-3) When the user wants to resume viewing from the continuation of the program that has been paused, the terminal device 23
It requests the router device 10 to release the suspension.

(B-4) The router device 10 requests the read / write control means 14 to resume reading, and the output control means 143 resumes reading the IP packet.
I do.

Thus, the user in front of the terminal device 23
You can watch the program from where you left off.

If the user wants to view the program from the beginning other than the time when the Internet broadcast starts, the procedure (a)
At the time of -1), the terminal device 23 requests the router device 10 not to read the stored IP packet. As a result, the output control unit 143 does not start reading the IP packet from the storage unit 15 until there is an instruction. At the time when the user wants to start viewing, the user requests the router device 10 to read the stored IP packet, and as a result, the output control means 143.
Starts reading the IP packet from the storage means 15 and is sent to the terminal device 23. Thus, the user can start viewing the program at any time after the start of the broadcast.

If the user wants to watch the program before (past) or behind (future) the program he is currently viewing, that is, if he wants to change the reproduction position of the IP packet sequence recorded in the storage means 15, the following is performed. The procedure is as follows.

First, the T of the program that the user is currently viewing is
The following procedure is performed when the user wants to view (past) s seconds before (ie, to skip ahead).

FIG. 5C shows the state of an IP packet output from the read / write control unit 14 to the routing control unit 13 when skipping forward.

(C-1) The terminal device 23 requests the router device 10 to skip forward for Ts seconds in accordance with a user's instruction.

(C-2) The router device 10 instructs the read / write control means 14 to skip forward in reading.

(C-3) The read packet number counter 142 decreases the value by an amount expected to correspond to Ts seconds (step 53 in FIG. 5). However, this process is performed in a range where the value of the read packet number counter 142 does not become less than 0.

The output control means 143 continues reading IP packets from the storage means 15 according to the value of the new read packet number counter 142. Therefore, reading is continued from the IP packet received by the router device 10 about Ts seconds before the IP packet read immediately before.

According to the above procedure, the user can watch the program about Ts seconds before.

Conversely, the T of the program the user is currently viewing
If the user wants to view the content backward for s seconds, that is, to skip backward, the following procedure is performed.

FIG. 5D shows an IP packet output from the read / write control unit 14 to the routing control unit 13 when the backward skip is performed.

(D-1) The terminal device 23 requests the router device 10 to skip backward by Ts seconds in accordance with a user's instruction.

(D-2) The router 10 instructs the read / write control means 14 to skip backward in reading.

(D-3) The read packet number counter 142 increases the value by an amount expected to correspond to Ts seconds (54). However, this process is performed in a range where the value of the read packet number counter 142 does not exceed the value of the write packet number counter 141.

The output control means 143 continues to read IP packets from the storage means 15 according to the value of the new read packet number counter 142. Therefore, reading is continued from the IP packet received by the router device 10 about Ts seconds after the IP packet read immediately before.

According to the above procedure, the user can watch the program from behind Ts seconds.

In the above embodiment, in the read / write control means 14 of the router device 10, the input time measurement means 144 measures the input time at which each IP packet was received from the routing control means 13, and divides the value into each value. The output control unit 143 writes the IP packet in association with the IP packet so that the difference between the input time of each IP packet and the output time output to the routing control unit 13 becomes a substantially constant value. The server device 22 measures the transmission time at which each IP packet is transmitted, inserts it into the transmitted IP packet, and the read / write control unit 14 of the router device 10 The transmission time is obtained from the packet, and the transmission time and the routing control means 13 are acquired.
The same effect as in the above-described embodiment can be obtained by a configuration in which the timing of outputting each IP packet to the routing control means 13 is controlled such that the difference between the output time and the output time of the packet becomes substantially constant. be able to.

Similarly, the read / write control means 14
The rate (input rate) of a stream composed of IP packets input from the routing control means 13 is measured, and the routing control means 1
Each IP packet is routed to the routing control means 1 so that the rate of the stream output to the third control unit 3 is equal to the input rate.
3, the same effect as in the above-described embodiment can be obtained.

When the input rate is substantially constant over the entire stream, the input rate can be obtained by averaging the arrival times of some packets constituting the stream. When the rate is changed, it is necessary to use information of the packet when the rate is changed. It is desirable that information relating to the input rate be stored in the storage unit 15.

In the above-described embodiment, the number of networks and the number of network interfaces are each 2
Has been described, but the same can be realized when the number of each is three or more.

Although the network interfaces 11 and 12 transmit and receive IP packets, the present invention is also applicable to a configuration in which each network interface performs transmission or reception.

It is also possible for the storage means 15 to be physically composed of a plurality of recording media. For example, information on the input time of each IP packet measured by the input time measuring means 144 and the IP packet can be stored separately. The present invention is also applied to a form for writing on a recording medium.

As described above, this embodiment has an effect that the time until the router device 10 transmits the received data packet can be controlled. Storage means 1
When transmitting the data packets read out from 5 to the network 17, the transmission interval of each data packet is
There is an effect that the interval when the router device 10 receives the data packet can be made substantially equal.

Further, there is an effect that the transmission start time of the data packet stored in the storage means 15 can be controlled or temporarily stopped during transmission by external control. Further, there is an effect that the reproduction position of the data packet sequence recorded in the storage means 15 can be changed from outside. Further, when the router device 10 transmits a data packet to the network, the transmission interval of each data packet can be made equal to the interval when the server device transmits the data packet.

Further, the router device 10 is
Has the effect that the data packets can be transmitted to the network 17 at the same rate as when the data packets were received. Further, in the present embodiment, there is an effect that it is possible to realize a network broadcast system in which the terminal device 23 can receive a data packet at a time different from the time when the server device 22 transmits the data packet. Further, this embodiment has an effect that the present invention can be applied to a case where a data packet to be stored is identified by a destination address of the data packet.

Conventionally, there has been a method of connecting a VTR or a hard disk to each terminal device and storing data for each terminal device. In this case, a storage means such as a VTR is required for each terminal device. . In contrast, in the present embodiment,
Since the router device includes the storage unit, there is an advantage that it is not necessary to provide the storage unit for each terminal device.

Conventionally, there has been a form in which a storage server for storing Internet broadcasts is stored on a LAN, and a terminal device accesses the storage server.
Before and after the introduction of the storage server, the procedure for viewing the Internet broadcast on the terminal device is different, and there is a problem that the introduction of the storage server cannot be performed smoothly. On the other hand, in the present embodiment, since the router device includes the storage means, there is an advantage that the specification of the terminal device does not need to be almost changed.

In the above-described embodiment, the data stored in the storage means 15 is read out by the network 1
7 is controlled by a request from the terminal device 23 connected to the terminal 7. However, for example, if the user
A reading instruction may be issued by pressing a button provided on the router device 10 or operating a remote controller, and reading control of data stored in the storage unit 15 may be performed according to the instruction. In any case, the read control of the data stored in the storage unit 15 is performed according to an instruction from outside the router device 10. In addition,
The instruction by the remote control operation may be performed by radio such as radio waves.

In the above-described embodiment, it is assumed that data is stored in the storage means 15 without an instruction from outside the router device 10. , Data may be stored in the storage means 15. Even in this case, since the user stores data in the storage unit 15 after the time when he / she stops during viewing,
By reading the data stored in the storage means 15 later, the data when the user is in the middle can be viewed.

Further, all or a part of each component of the router device according to the above-described embodiment may be hardware, or may be software having the same function as the corresponding function of the hardware. Good.

A program and / or a program for causing a computer to execute all or some of the functions of all or some of the components of the router device according to the above-described embodiment.
Alternatively, a medium that carries data and that can be processed by a computer also belongs to the present invention.

The medium includes a recording medium such as a ROM, a transmission medium such as the Internet, and a transmission medium such as light, radio waves, and sound waves. The carried medium includes, for example, a recording medium on which a program and / or data is recorded, a transmission medium for transmitting the program and / or data, and the like.

Therefore, when the medium is a recording medium,
The recording medium is a recording medium that records a program and / or data for causing a computer to execute all or some of the functions of all or some of the components of the router device according to the above-described embodiment. And the read program and / or data may be a recording medium that executes the function in cooperation with the computer.

Note that processing by a computer means
For example, in the case of a recording medium such as a ROM, it means that the program can be read by a computer.
Or it means that the data can be handled by a computer as a result of the transmission.

Further, an information aggregate characterized by being a program and / or data for causing a computer to execute all or some of the functions of all or some of the components of the router device of the above-described embodiment. Also belong to the present invention.

The information aggregate includes, for example, software such as programs and / or data.

The data in the medium and the information aggregate described above includes a data structure, a data format, a data type, and the like.

[0088]

As is apparent from the above description, according to the present invention, it is possible to view an Internet broadcast program even when the time when the program is broadcast from the server device and the time when the program is viewed on the terminal device are different. In addition, it is possible to provide a router device that enables a user to view a broadcast while the user is in the middle of watching while watching.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a router device according to an embodiment of the present invention.

FIG. 2 is a system configuration diagram of an Internet broadcast configured using the router device according to the embodiment of the present invention;

FIG. 3 is a schematic configuration diagram of a conventional router device.

FIG. 4 is a system configuration diagram of an Internet broadcast configured using a conventional router device.

FIG. 5 shows a relationship between an IP packet input from the routing control unit to the read / write control unit and an IP packet output from the read / write control unit to the routing control unit in one example of the router device according to the embodiment of the present invention. The figure shown

[Description of Signs] 10 Router device 11, 12 Network interface 13 Routing control means 14 Read / write control means 141 Write packet number counter 142 Read packet number counter 143 Output control means 144 Input time measurement means 15 Storage means 16, 17 Network 18 Internet 22 Server device 23 terminal device 30 router device 33 routing control means 51 pause request 52 restart request 53 forward skip request 54 backward skip request

Claims (11)

[Claims] A first network interface unit connected to a first network for receiving data from the first network; a storage unit for storing data received by the first network interface unit; A write control unit that controls writing of data to the storage unit; a read control unit that controls reading of data stored in the storage unit; and a transmission control unit that controls transmission of data read by the read control unit. Routing control means, and second network interface means connected to the second network and transmitting data read by the read control means to the second network under the control of the routing control means. The read control means is provided outside A router controlling reading of the data in accordance with an instruction from a unit. 2. A first network interface unit connected to a first network for receiving data from the first network, and a storage unit for storing data received by the first network interface unit. A write control unit that controls writing of data to the storage unit in accordance with an external instruction; a read control unit that controls reading of data stored in the storage unit; Routing control means for controlling the transmission of the read data, and connected to a second network, wherein the data read by the read control means is transmitted to the second network under the control of the routing control means. And second network interface means. The read control unit, the router apparatus characterized by controlling the reading of the data in accordance with an instruction from the outside. 3. The storage device according to claim 1, wherein the routing control unit sets a storage condition of data to be stored in the storage unit and information on a final output destination of data output from the second network interface unit. And outputting all or part of the data received by the first network interface unit to the write control unit and adding the information of the final output destination to the data read from the storage unit based on The writing control means controls writing of the data from the routing control means to the storage means, and the second network interface means reads the data by the reading control means. The routing control means adds the information of the final output destination to the Case, the router apparatus according to claim 1 or 2, characterized in that it is possible to transmit the information of the final destination is added data. 4. The data received by the first network interface unit is a data packet, and the write control unit measures an input time of each of the data packets input from the routing control unit. Means, and the input time measured by the input time measuring means is stored in the storage means in association with each of the data packets, and the read control means reads the data packet from the storage means. 4. The router device according to claim 1, wherein the input time is also read from the storage unit, and the read and output timing of the data packet is controlled using the input time. 5. The writing control according to claim 1, wherein the data received by the first network interface means comprises data packets, and the transmission time information of each data packet is added thereto. The means stores the transmission time in the storage means in association with each of the data packets, and the read control means reads the transmission time from the storage means when reading the data packet from the storage means. 4. The router device according to claim 1, wherein the timing of reading and outputting the data packet is controlled using the transmission time. 6. The data received by the first network interface means is a stream composed of data packets, and the write control means measures a rate of the stream input from the routing control means. Means for storing the rate measured by the rate measuring means in the storage means in association with the stream, wherein the read control means stores the rate when reading the stream from the storage means. 4. The router device according to claim 1, wherein the router reads the stream and controls the timing of reading and outputting the stream using the rate. 7. The data received by the first network interface means is a data packet, and the read control means has a count means indicating a data packet to be read next from the storage means. 7. The method according to claim 1, wherein reading of the data packet from the storage unit is controlled based on a value, and the value of the counting unit changes based on an external instruction. Router device. 8. The router according to claim 3, wherein the storage condition includes a destination address of data. 9. The server device according to claim 1, wherein the server device transmits data, and the router device receives the data transmitted by the server device, and transmits all or a part of the received data. A terminal device for receiving and outputting data transmitted by the router device. 10. A medium carrying a program and / or data for causing a computer to execute all or a part of the functions of all or part of the router device according to any one of claims 1 to 8. A medium which can be processed by a computer. 11. A program and / or data for causing a computer to execute all or a part of the functions of all or part of the router device according to any one of claims 1 to 8. Information aggregate to do.