JPH11136290A - Packet transmission system, packet transmission method and inter-network connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To properly distribute loads in the case of sending packets to a 2nd network via a 1st network. SOLUTION: In case of sending a packet to a 2nd network by sending the packet to a 1st network coupled with pluralities of network interfaces in one- ot-one connection to pluralities of opposite network connectors connected to the 2nd network, the system is provided with a ratio decision means 21 that decides by which ratio packets to be sent to the 2nd network, are sent to pluralities of network interfaces and with a transmission execution means 22 that sends a packet for the corresponding network interface to the 1st network based on the ratio decided by the ratio decision means 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packet transmitting apparatus and a packet transmitting method for appropriately transmitting a packet to a required network in various network systems, and further relates to an inter-network connecting apparatus adopting the packet transmitting method. .

[0002]

2. Description of the Related Art Conventionally, in an inter-network connection device such as a router for interconnecting different networks such as a LAN (local area network), when the speed of a transmission path serving as a packet transmission path is low, 2. Description of the Related Art Distributed relaying in which packets addressed to the same network are distributed over a plurality of routes and relayed is performed.

[0003] That is, as shown in FIG.
When transmitting a packet from the LAN 10 to the LAN 120, the router 100 is connected to the LAN 110,
0 is connected to the router 200. And the router 10
0 and the router 200 are arranged to face each other, and these are connected via a plurality of lines (or WANs (Wide Area Networks)) 130 and 140.

[0004] Then, the packets directed from the LAN 110 to the LAN 120 are distributed to the line 130 and the line 140 in the router 100 according to a predetermined algorithm to distribute the load.

[0005]

However, according to the above configuration, a plurality of lines exist between routers to distribute the load, but a pair of routers facing each other are provided between LANs. However, if a failure occurs in any of the routers, packet transmission stops, and the system lacks reliability.

In addition, it has not been possible to properly cope with the line communication conditions and line quality differences that change every moment.

The present invention has been made in order to solve the above-mentioned problems of the conventional network connecting apparatus.
The purpose is to be able to properly balance the load,
An object of the present invention is to provide a packet transmitting apparatus, a packet transmitting method, and an inter-network connecting apparatus that can appropriately cope with a communication situation of a line and a difference in line quality that change with time.

[0008]

According to a first aspect of the present invention, there is provided a packet transmitting apparatus comprising: a plurality of networks connected one-to-one to a plurality of opposite network connecting apparatuses connected to a second network; Transmitting a packet to a first network coupled to the
A packet transmitting device for transmitting a packet to the second network, a ratio determining means for determining at what ratio a packet to be transmitted to the second network is transmitted to the plurality of inter-network connecting devices; Transmission execution means for transmitting a packet for a corresponding inter-network connecting device to the first network based on the ratio determined by the means. Thus, when a packet is sent to the second network, the packet is distributed to a plurality of network connection devices at an appropriate ratio and sent through the first network.

According to a second aspect of the present invention, there is provided a packet transmitting apparatus, comprising: presetting means for presetting data relating to a packet transmission ratio, wherein the ratio determining means is based on the data preset by the presetting means. A packet transmission ratio is determined. As a result, it is possible to preset a necessary ratio so that packets are distributed and sent to a plurality of network connection devices at an appropriate ratio.

According to a third aspect of the present invention, there is provided a packet transmitting apparatus, comprising: a packet capturing unit for capturing a status notification packet including data relating to a transmission ratio of a packet transmitted from the network connecting device; Determines the transmission ratio of the packet based on the data related to the transmission ratio included in the status notification packet captured by the packet capturing unit. As a result, the transmission can be performed with the ratio changed according to the circumstances of the network connection device.

According to a fourth aspect of the present invention, there is provided a packet transmitting device having packet capturing means for capturing a status notification packet transmitted from the inter-network connecting device and indicating congestion information indicating the degree of congestion of the inter-network connecting device. And
The ratio determining unit changes a packet transmission ratio based on the congestion information included in the status notification packet captured by the packet capturing unit. As a result, the transmission can be performed with the ratio changed depending on the degree of congestion of the network connection device.

According to a fifth aspect of the present invention, there is provided a packet transmitting method, wherein a plurality of inter-network connecting devices connected one-to-one to a plurality of opposing network connecting devices connected to the second network. In the packet transmission method for transmitting a packet to the first network and transmitting the packet to the second network, what kind of packet to be transmitted to the second network is transmitted to the plurality of inter-network connecting devices. It is characterized in that it is determined whether to transmit at the ratio or not, and a packet for the corresponding inter-network connecting device is transmitted to the first network based on the determined ratio. Thus, when a packet is sent to the second network, the packet is distributed to a plurality of network connection devices at an appropriate ratio and sent through the first network.

A packet transmission method according to a sixth aspect of the present invention is characterized in that data relating to a packet transmission ratio is preset, and a packet transmission ratio is determined based on the preset data. As a result, it is possible to preset a necessary ratio so that packets are distributed and sent to a plurality of network connection devices at an appropriate ratio.

According to a seventh aspect of the present invention, in the packet transmitting method, a status notification packet including data relating to a transmission ratio of a packet transmitted from the network connection apparatus is captured, and the status notification packet is included in the captured status notification packet. The transmission ratio of the packet is determined based on the data relating to the transmission ratio. As a result, the transmission can be performed with the ratio changed according to the circumstances of the network connection device.

[0015] The packet transmitting method according to claim 8 of the present invention captures a status notification packet containing congestion information indicating the degree of congestion of the inter-network connecting device, which is transmitted from the inter-network connecting device. The transmission ratio of the packet is changed based on the congestion information included in the notification packet. As a result, transmission can be performed with the transmission ratio changed depending on the degree of congestion of the network connection device.

According to a ninth aspect of the present invention, an inter-network connecting device is coupled to a plurality of inter-network connecting devices connected one-to-one to a plurality of opposing network connecting devices connected to a second network. A network connection device that transmits a packet to the first network and transmits a packet to the second network,
Ratio determining means for determining at what ratio a packet to be transmitted to the second network is to be transmitted to the plurality of inter-network connecting devices; and a network between corresponding networks based on the ratio determined by the ratio determining means. Transmission execution means for transmitting a packet for the connection device to the first network. Thus, when sending a packet to the second network,
When the data is transmitted via the first network to a plurality of network connection devices, the data is distributed and sent at an appropriate ratio.

According to a tenth aspect of the present invention, an inter-network connecting device transmits a status notification packet including data relating to a packet transmission ratio based on a speed of a line provided between the network connecting device and the opposing inter-network connecting device. It is characterized by comprising a status notifying means for transmitting. As a result, the data relating to the packet transmission ratio can be given to another inter-network connecting device, and the distribution ratio of the packet can be determined.

[0018] An internetwork connecting apparatus according to an eleventh aspect of the present invention is characterized by comprising a status notifying means for transmitting a status notification packet including congestion information indicating the degree of congestion of the apparatus. As a result, the congestion information can be given to another inter-network connecting device to change the packet distribution ratio.

[0019]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a packet transmitting apparatus, a packet transmitting method, and a network connecting apparatus according to an embodiment of the present invention; And duplicate explanations are omitted. The router described below is a packet transmitting device,
It is an example of a network connection device. The packet transmitting device may be a terminal such as a workstation connected to a network, and the inter-network connecting device may be a gateway.

FIG. 1 shows a router 1 according to an embodiment. The router 1 includes a relay processing unit 2 configured by a computer and configured to relay a packet, and a network interface 3 configured to transmit and receive the packet between the relay processing unit 2 and the networks 80-1 to 80-m. Network interfaces 4-1 to 4-n for transmitting and receiving packets between the relay processing unit 2 and the networks 90-1 to 90-n are provided. The networks 80-1 to 80-m and the networks 90-1 to 90-n include lines and WAs in addition to LANs.
N may be used.

The relay processing unit 2 includes a ratio determining unit 21 implemented by a computer as a program, a transmission executing unit 2
2. Packet capturing means 23 and status notifying means 24 are provided. Further, a relay table 25 and a packet distribution table 26 realized by a memory table are provided. Further, a preset means 27 realized by a keyboard or a ROM for providing data is provided.

This router 1 is arranged, for example, at the position of router # 0 shown in FIG. That is, 1 is assigned to the routers # 1 ′ to #n ′, which are a plurality of opposing network connection devices connected to the LAN 120 that is the second network.
A packet is transmitted to the LAN 110, which is the first network, connected to the routers # 1 to #n, which are a plurality of inter-network connecting devices connected one-to-one, and the packet is transmitted to the LAN 120, which is the second network. Used for transmitting router # 0.

The ratio determining means 21 transmits the packet to be transmitted to the LAN 120 as the second network to the router # 1 as the plurality of network connecting devices.
To #n to determine what ratio to transmit. Further, the transmission executing means 22 includes the ratio determining means 2
The packet is transmitted to the first network LAN 110 for the routers # 1 to #n corresponding to the corresponding network connecting device based on the ratio determined in step S1.

As shown in FIG. 2, the relay table 25 is composed of a routing table and a load distribution table, and a transmission (transmission) ratio for each router is set in the load distribution table. Preset means 27 is used to preset the transmission ratio. When the preset means 27 is constituted by an input device for data such as a keyboard or the like, the transmission (transmission) ratio to each of the above routers by a key input or the lines 11-1 to 11-n extending from each of the routers # 1 to #n. Is input. Also, if the presetting means 27
When configured by an OM or a switch, the data stored in the ROM or reset by the switch is the transmission (transmission) ratio itself to each router or the lines 11-1 to 11n extending from each of the routers # 1 to #n. 11
-N transmission speed data.

The ratio determining means 21 sets the transmission (transmission) ratio itself preset by the above-mentioned presetting means 27 in the load distribution table of FIG. 2 or, if the transmission speed is the transmission speed, determines the transmission speed ratio. It is converted into a transmission (transmission) ratio and set in the load distribution table of FIG. 2 for use.

The status notifying means 24 is based on the speed of a line provided between the opposing inter-network connecting device.
A status notification packet including data relating to the packet transmission ratio is transmitted. For example, routers # 1 to #n in FIG.
In, based on the line speeds of the lines 11-1 to 11-n, a status notification packet including data (line speed or transmission ratio itself) relating to a packet transmission ratio is transmitted to another router by multicast (including broadcast). I do. The status notifying unit 24 transmits a status notification packet including congestion information indicating the degree of congestion of the router as the device. For example, routers # 1 to ## in FIG.
In n, congestion information is created based on the accumulation status of packets to be transmitted to the lines 11-1 to 11-n. In other words, in this example, three levels of congestion information of normal, light congestion, and heavy congestion are created in accordance with the state of accumulation in the buffer for storing packets and the transmission queue. Light congestion is when a certain value close to the maximum capacity is exceeded, and heavy congestion is when an overflow occurs. The created information is packaged in a status notification packet and transmitted to other routers by multicast (including broadcast). Each router # 0,
Since # 1 to #n transmit the status notification packet by multicast (including broadcast), the status notification packets are mutually transmitted and received via the LAN 110 as shown in FIG. The multicast transmission is executed at predetermined time intervals.

The status notification packet transmitted as described above by multicast (including broadcast) is captured by the packet capturing means 23. The ratio determining means 21
The packet transmission ratio is determined based on the transmission ratio data included in the status notification packet captured by the packet capturing unit 23. Therefore, when the transmission ratio is determined in this way, the presetting by the presetting unit 27 can be unnecessary. Then, when the line quality is deteriorated, the data relating to the transmission ratio is changed, so that the preset transmission ratio is changed. The ratio determining unit 21 changes the packet transmission ratio based on the congestion information included in the status notification packet captured by the packet capturing unit 23.

Next, the configuration of the relay table shown in FIG. 2 will be described. In the routing table of the relay table, the entry number (NO), the interface number (I / F NO.), The destination network address and submask, the IP address of the router to which the packet is to be transmitted, the number of hops, and the congestion level are shown. They are stored in association with each other. This routing table indicates that a packet destined for a registered network address passes through a router having the correspondingly stored router IP address. The subnet mask is
Here, it is shown that up to three octets are used for network identification. The number of hops indicates the number of routers passing, and when the number of hops is the same, distribution of packets is performed according to the transmission ratio. The congestion level is set to one of “normal”, “light congestion”, and “heavy congestion” based on the above congestion information. Except for the congestion level, RIP (Routing Informat
Automatic registration using a routing protocol such as an ion protocol, or manual input by an operator in advance.

In the load distribution table, the transmission ratio, the current transmission number, and the next transmission order are set for the entry number (NO) corresponding to the routing table. In the load distribution table, one group is formed by entries having the same network address and the same hop number in the routing table, and packets are distributed and distributed within the same group.
Accordingly, entry numbers (NO) 1 to 3 constitute the same group, and entry numbers (NO) 4 and thereafter constitute another identical group.

One packet distribution table 26 is prepared corresponding to the same group of the load distribution tables. For example, for the groups of entry numbers (NO) 1 to 3 of the load distribution table, when the congestion levels of the routers # 1 to # 3 are normal, a table as shown in FIG. 6 is prepared. You. That is, router # 1
# 3 is a table for performing packet transmission with a transmission ratio of 3: 2: 2. It is assumed that the routers correspond to the routers # 1 to # 3 from the entry numbers (NO) 1 to 3 of the routing table.

When light congestion occurs in the destination router, the transmission ratio is changed (the ratio is reduced). For example, when light congestion occurs in the router # 3, as shown in FIG. 7, a packet distribution table is prepared for the routers # 1 to # 3 to perform packet transmission at a transmission ratio of 3: 2: 1. Further, when heavy congestion occurs in the destination router, the transmission ratio is changed (it is further reduced compared to light congestion). For example, when heavy congestion occurs in the router # 3, as shown in FIG.
A packet distribution table for performing packet transmission with a transmission ratio of 2: 0 is prepared. In this packet distribution table, when there is “1” at the position indicated by the next transmission order / column pointer and the next transmission order / row pointer, the corresponding router becomes the transmission destination. 6 to 8 show examples in which the router # 2 is the transmission destination.

The operation starts in the network system configured as described above, and the relay table 25 shown in FIG.
Is set, and every time the status notification packet is received, the process of the flowchart in FIG. 9 is executed. That is,
The packet capturing means 23 monitors the arrival of the status notification packet (S1), and when the status notification packet arrives, captures the packet, extracts the congestion level in the packet, and writes it in the corresponding area of the routing table (S2). Further, when the transmission speed is changed according to the line quality or the like, the transmission speed is changed (notified as the transmission speed or as data relating to the transmission ratio), so that it is captured and held. Then, it is detected whether or not it is necessary to change the transmission ratio according to the data relating to the congestion level and the transmission ratio (S3). That is, when there is a change in the congestion level or when there is a change in the data related to the transmission ratio, it is necessary to change the transmission ratio. When it is necessary to change the transmission ratio, the transmission ratio is changed in accordance with the change in the congestion level or the data related to the transmission ratio, and a packet distribution table corresponding to the new transmission ratio is prepared. That is, the transmission ratio of the load distribution table in the relay table 25 shown in FIG. 2 is rewritten by the transmission ratio determining unit 21, and the transmission executing unit 22 stores the table corresponding to the transmission ratio in the packet distribution table 26. Will be prepared. On the other hand, when there is no need to change the transmission ratio, the process returns to step S4 and continues.

As a result of the above processing, packets destined for the LAN 120 are transmitted via the routers # 1 to # 3, and the transmission ratio is 3: 2 when each of the routers # 1 to # 3 is normal. : 2, the packet distribution table of FIG. 6 is prepared, and when the router # 3 becomes lightly congested, the transmission ratio is 3:
2: 1, the packet distribution table of FIG. 7 is prepared, and when the router # 3 becomes congested, the transmission ratio is 3: 2: 0.
And the packet distribution table of FIG. 8 is prepared.

When transmitting a packet to the routers # 1 to # 3, the destination of the packet is determined using the packet distribution table by the processing of the flowchart shown in FIG. 10. This will be described. . In the initial state, the next transmission order / row pointer (hereinafter, row pointer) is set to the first row, and the next transmission order / column pointer (hereinafter, row pointer) is set to the first row.
Column pointer) is positioned in the first column. First, transmission is performed to the router # 1 at the position indicated by the row pointer and the column pointer. Then, it is detected whether there is a next line (S21). Since there is a next line at first, the line pointer is shifted to the next line (S22), and the indicated value of the line pointer at that time is detected (S23). The indicated value is "1"
If so, the router at the position indicated by the row pointer and the column pointer at that time is the destination of the next packet (S2
4). That is, the data is first transmitted to the router # 1, and then transmitted to the router # 2.

Then, when transmitting to the router # 3,
Since there is no next line, the process branches to NO in step 21 and
The row pointer is moved to the top row (S25), and it is detected whether the column pointer can be moved (shifted to the left) (S2).
6). Up to the eighth column can be shifted, branching to YSE and shifting the column pointer to the left (S27). Then, a value related to the position indicated by the row pointer and the column pointer is detected (S
28). If the designated value is "1", the router at the designated position of the row pointer and the column pointer at that time becomes the transmission destination of the next packet (S29). In other words, in the second and subsequent columns, the contents of the table are sequentially transmitted to the router whose contents are 1.

In step S26, when it is detected that the column pointer is not movable, that is, when the column pointer has moved to the final eighth column, the column pointer is moved to the rightmost position (first column). In S29, the router at the position indicated by the row pointer and the column pointer at that time is set as the transmission destination of the next packet. If it is detected in step S23 or step S28 that the indicated value is "0", the process returns to step S21 to continue the process.

As a result of the above processing, when a packet is transmitted using the packet distribution table shown in FIG. 6, as shown in FIG. 11, packets PK1 to PK7 are PK4,
Three packets of PK7 are transmitted to the router # 1, two packets of packets PK2 and PK5 are transmitted to the router # 2, and two packets of packets PK3 and PK6 are transmitted to the router # 3. Transmission is performed at a transmission ratio of 2: 2. Packet PK related to subsequent reception
8, PK9,... Are similarly transmitted at a transmission ratio of 3: 2: 2 as long as the congestion level and the like do not change.

When the router # 3 is lightly congested, packets are transmitted using the packet distribution table shown in FIG. 7, and as shown in FIG. 12, packets PK1 to PK6 are transmitted using the packet PK1. , P
Three packets K4 and PK6 are transmitted to the router # 1, and two packets PK2 and PK5 are transmitted to the router # 2.
, One packet of the packet PK3 is transmitted to the router # 3, and transmission is performed at a transmission ratio of 3: 2: 1. Packet PK related to subsequent reception
7, PK8, PK9,... Are similarly transmitted at a transmission ratio of 3: 2: 1 unless the congestion level or the like changes.

Further, when the router # 3 is heavily congested, packets are transmitted using the packet distribution table shown in FIG. 8, and as shown in FIG. , P
Three packets K3 and PK5 are transmitted to the router # 1, and two packets PK2 and PK4 are transmitted to the router # 2.
And the packet is not transmitted to the router # 3, and the transmission is performed at the transmission ratio of 3: 2: 0. Packets PK6, PK7, P related to reception after this
As for K8,..., The transmission is similarly performed at the transmission ratio of 3: 2: 0 as long as the congestion level and the like do not change.

As described above, in the network system shown in FIG. 5, when a packet is transmitted from the router # 0 to the network 120, the packet is transmitted to the routers # 1 to # 3 as shown in FIG. Are transmitted in a distributed manner, and when the routers # 1 to # 3 are normal, transmission is performed at a transmission ratio of 3: 2: 2. This ratio is obtained when the transmission speeds of the lines 11-1, 11-2, and 11-3 are, for example, 1.5 MHz, 1024 KHz, and 1024 KHz. In the configuration of FIG. 2, the transmission queue is provided for each router of the transmission destination. However, when the transmission speed of the line connected to the LAN 110 is low, one transmission queue can be used.

[0041]

As described above, according to the packet transmitting apparatus of the first aspect, when transmitting a packet to the second network, the packet transmitting apparatus is suitable for a plurality of network connecting apparatuses via the first network. Since the packets are distributed at a suitable ratio, the number of paths to the second network is plural, and stable packet transmission can be performed.

As described above, according to the packet transmitting apparatus of the second aspect, since the presetting means for presetting the data relating to the packet transmitting ratio is provided, the necessary ratio is preset. Packets can be distributed and sent at an appropriate ratio to a plurality of network connection devices, and the ratio for each route can be set appropriately.

As described above, according to the packet transmitting apparatus of the third aspect, the state notification packet including the data relating to the transmission rate of the packet transmitted from the network connection apparatus is taken in, and the packet transmission ratio is determined. Therefore, the transmission can be performed with the ratio changed depending on the circumstances of the network connection device.

As described above, according to the packet transmitting apparatus of the fourth aspect, the state notification packet including the congestion information indicating the degree of congestion of the inter-network connecting device transmitted from the inter-network connecting device is taken in, and the packet is transmitted. , The transmission ratio can be changed according to the degree of congestion of the network connection device.

As described above, according to the packet transmission method of the fifth aspect, when a packet is transmitted to the second network, an appropriate ratio is transmitted to a plurality of network connection devices when passing through the first network. , The data is distributed and transmitted, so that there are a plurality of routes to the second network, and stable packet transmission can be performed.

As described above, according to the packet transmission method of the sixth aspect, since the data relating to the packet transmission ratio is preset, the necessary ratio is preset, and the appropriate ratio is set for a plurality of network connection devices. , The packets can be distributed and sent, and the ratio for each path can be set appropriately.

As described above, according to the packet transmission method of the seventh aspect, the state notification packet including the data relating to the transmission ratio of the packet transmitted from the network connection device is taken in, and the packet transmission ratio is determined. Therefore, the transmission can be performed with the ratio changed depending on the circumstances of the network connection device.

As described above, according to the packet transmitting method of the eighth aspect, the state notification packet including the congestion information indicating the degree of congestion of the inter-network connecting device, which is transmitted from the inter-network connecting device, is fetched to obtain the packet. , The transmission ratio can be changed according to the degree of congestion of the network connection device.

As described above, according to the inter-network connecting apparatus of the ninth aspect, when a packet is sent to the second network, it is suitable for a plurality of network connecting apparatuses via the first network. Since the packets are sent in a distributed manner, there are a plurality of routes to the second network, and stable packet transmission can be performed.

As described above, according to the tenth aspect of the present invention, the data including the data relating to the packet transmission ratio is included based on the speed of the line provided between the network connecting device and the opposite network connecting device. Since it is configured to transmit the status notification packet, by giving data related to the packet transmission ratio to other inter-network connecting devices,
The packet distribution ratio can be determined.

As described above, according to the network connection apparatus of the present invention, since the state notification packet including the congestion information indicating the degree of congestion of the apparatus is configured to be transmitted, the communication between the other networks can be performed. By providing congestion information to the connection device, the distribution ratio of packets can be changed.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a packet transmission device and a router that is a network connection device according to the present invention.

FIG. 2 is a configuration diagram of a relay table used for a packet transmission device and a router that is a network connection device according to the present invention.

FIG. 3 is a diagram showing packet distribution transmission in a network system configured by a packet transmission device according to the present invention and a router that is a network connection device.

FIG. 4 is a diagram showing an operation of status notification by a packet transmission device and a router which is a network connection device according to the present invention.

FIG. 5 is a configuration diagram of a network system configured by a packet transmission device and a router that is a network connection device according to the present invention.

FIG. 6 is a configuration diagram of a normal packet distribution table of a partner router used in a router that is a packet transmission device and a network connection device according to the present invention.

FIG. 7 is a configuration diagram of a packet distribution table used in a packet transmission device and a router serving as an inter-network connection device according to the present invention when a counterpart router is lightly congested;

FIG. 8 is a configuration diagram of a packet distribution table used in a packet transmission device and a router serving as an inter-network connection device according to the present invention when a counterpart router is heavily congested.

FIG. 9 is a flowchart for explaining operations of a packet transmission device and a router as an inter-network connection device according to the present invention;

FIG. 10 is a flowchart for explaining operations of a packet transmission device and a router as an inter-network connection device according to the present invention.

FIG. 11 is a diagram showing the order of packet transmission when the other router is normal by the packet transmission device and the router which is the network connection device according to the present invention.

FIG. 12 is a diagram showing the order of packet transmission when the other router is lightly congested by the packet transmission device and the router as the network connection device according to the present invention.

FIG. 13 is a diagram showing the order of packet transmission when the other router is heavily congested by the packet transmission device and the router which is the network connection device according to the present invention.

FIG. 14 is a diagram showing load distribution by a conventional network system.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 router 2 relay processing unit 21 ratio determining means 22 transmission executing means 23 packet capturing means 24 status notifying means 25 relay table 26 packet distribution table 27 presetting means

Claims (11)

[Claims] A packet is transmitted to a first network coupled to a plurality of inter-network connecting devices connected one-to-one to a plurality of opposing network connecting devices connected to a second network. A packet transmitting apparatus for transmitting a packet to the second network, a ratio determining means for determining at what ratio a packet to be transmitted to the second network is transmitted to the plurality of inter-network connecting apparatuses; The packet to the corresponding inter-network connecting device is transmitted to the first network based on the ratio determined by the ratio determining means.
And a transmission execution unit for transmitting the packet to the network. 2. The apparatus according to claim 1, further comprising a preset unit for presetting data relating to a packet transmission ratio, wherein the ratio determination unit determines a packet transmission ratio based on the data preset by the preset unit. The packet transmission device according to claim 1. 3. A packet capturing means for capturing a status notification packet including data relating to a transmission ratio of a packet transmitted from the network connecting device, wherein the ratio determining means includes a state captured by the packet capturing means. The packet transmission device according to claim 1, wherein a packet transmission ratio is determined based on data on the transmission ratio included in the notification packet. 4. A packet capturing unit for capturing a status notification packet including congestion information indicating the degree of congestion of the network connecting device transmitted from the network connecting device, wherein the ratio determining unit includes the packet capturing unit. The packet transmission device according to any one of claims 1 to 3, wherein the transmission ratio of the packet is changed based on the congestion information included in the status notification packet captured by (1). 5. A packet is transmitted to a first network coupled to a plurality of inter-network connecting devices connected one-to-one to a plurality of opposing network connecting devices connected to a second network. In the packet transmission method for transmitting a packet to the second network, a ratio to transmit a packet to be transmitted to the second network to the plurality of inter-network connecting devices is determined. Transmitting a packet to a corresponding inter-network connecting device to the first network based on the calculated ratio. 6. The packet transmission method according to claim 5, wherein data relating to a packet transmission ratio is preset, and a packet transmission ratio is determined based on the preset data. 7. A status notification packet including data relating to a transmission ratio of a packet transmitted from the network connection device, and a packet transmission ratio based on the transmission ratio data included in the captured status notification packet. The packet transmission method according to claim 5, wherein: 8. A status notification packet including congestion information indicating the degree of congestion of the inter-network connection device transmitted from the inter-network connection device, and a packet of the packet is determined based on the congestion information included in the fetched status notification packet. The packet transmission method according to claim 5, wherein the transmission ratio is changed. 9. A packet is transmitted to a first network coupled to a plurality of inter-network connecting devices connected one-to-one to a plurality of opposing network connecting devices connected to a second network. Ratio determining means for determining at what ratio a packet to be transmitted to the second network is to be transmitted to the plurality of network connecting devices. And transmitting the packet to the corresponding inter-network connecting device based on the ratio determined by the ratio determining means.
And a transmission executing means for transmitting to the network. 10. A status notifying means for transmitting a status notification packet including data relating to a packet transmission ratio based on a speed of a line provided between an opposing inter-network connecting apparatus. The network connection device according to claim 9. 11. The inter-network connection device according to claim 9, further comprising a status notification unit that transmits a status notification packet including congestion information indicating a degree of congestion of the device.