JPH04250748A - Node controller - Google Patents

Abstract

PURPOSE:To utilize a line of a communication network efficiently in response to a change in a reception information quantity of a receiver side node. CONSTITUTION:When a node C as a prescribed node being a destination of information transmission receives information from a path (a), a reception information storage section 10 stores the information, and when the node C receives the information from a path (b), a reception information storage section 11 stores the information. A reception information quantity discrimination section 12 provided to the node C monitors the reception information quantity stored in the reception information storage sections 10, 11 and grasps the difference of the reception information quantity. A changeover means 13 of a node controller provided to a node A going to send the information to the node C monitors periodically the reception information quantity discrimination section 12 to recognize the difference from the reception information quantity received by the node C from each path and selects the information to be sent to the prescribed node, that is, the node C to be given to a bypass discrimination means 5 or a bypass operation section 4 directly based on the recognition.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a node control device, such as a storage/forwarding device, provided in a node of a communication network.

0002

2. Description of the Related Art FIG. 3 is a relay system diagram showing a communication network in which a plurality of (three) nodes are interconnected, and FIG. 4 is a functional block diagram showing a conventional node control device provided at node A. It is a diagram.

[0003] In FIG. 4, reference numerals 1 and 2 indicate transmission information storage units that store information to be transmitted for each destination node. Reference numeral 3 denotes a detour operation unit that serves as a transmitting means for directly transmitting information to be transmitted to a predetermined node, for example, node C, and 4 is a detour operation unit that transmits information to be transmitted to node C, which is the predetermined node, to another node, ie, a node. This is a detour operation unit that serves as a transmitting means for detouring and transmitting B.

[0004] 5 determines whether or not to detour based on congestion detour condition information given in advance, and depending on the result of the determination, transmits information to the predetermined node to the detour operation unit 3 or the detour operation unit 4. This is a detour determining means that sends the information to either of the following. Reference numeral 6 denotes a B-destination transmitter that sends information received from the detour operation unit 3 or the detour operation unit 4 to the node B;
Reference numeral 7 denotes a C-destination transmitter that sends information received from the detour operation unit 3 or the detour operation unit 4 to the node C.

Reference numeral 8 indicates whether the information to be transmitted to the predetermined node is given to the detour action section 3 or the detour action section 4 via the detour determination means 5 for transmission, or the information is transmitted directly to the detour action section without going through the detour determination means 5. This is a switching means for switching whether or not to send the signal to the 4th terminal. Reference numeral 9 denotes a control signal for controlling switching of the switching means 8.

Next, the operation will be explained. Here, it is assumed that the transmission information storage section 1 stores information addressed to node B, and the transmission information storage section 2 stores information addressed to node C.

[0007] The detour determining means 5 determines whether information should be transmitted in a detour or directly based on congestion detour conditions given in advance. According to the judgment result, the detour determining means 5 transfers the information stored in the transmission information storage section 1 or 2 to the detour operation section 3 or the detour operation section 4.
Send to either.

[0008] The detour operation unit 4 uses the given information to
If it is addressed to node B, the information is sent to the B-destination transmitter 6, while if it is addressed to node C, the information is sent to the B-destination transmitter 6 and C-destination transmitter 7 according to certain conditions.

Further, if the given information is addressed to node B, the detour rejection operation unit 3 sends the information to the B-destination transmitting unit 6, while if the information is addressed to node C, it sends the information to C. The information is sent to the destination transmitter 7.

[0010] The B-destination transmitter 6 transmits the given information to the line on the node B side in a predetermined format. As a result, when the detour determining means 5 selects the detour operation, the detour operation section 4 functions, and if the destination of the sent information is node B, the information is transmitted to node B as shown by the broken line in FIG. be done. On the other hand, if the destination of the sent information is node C, the information is sent to node C via node B, as shown by the dashed line in FIG.

On the other hand, the C-destination transmitter 7 transmits the given information to the node C in a predetermined format, as shown by the solid line in FIG.

Here, the switching means 8 selects and switches, depending on the control signal 9, whether to give the information sent from the transmission information storage section 1 or 2 to the detour determining means or directly to the detour operation section 4. . Note that this control signal 9 is output by the operator operating a switch (not shown), or by the control section of the storage/exchange device under preset conditions (for example, data storage in the information storage sections 1 and 2). It is configured to monitor whether the difference in amount is greater than or equal to a predetermined value and to output the output based on the predetermined conditions.

Here, when the switching means 8 is switched by this control signal 9 so that the information stored in the transmission information storage unit 1 or 2 is given to the detour determining means 5, the detour determining means 5 Based on the given congestion detour condition information, it is determined whether to perform detour or direct transmission, and transmission is performed.

[0014] Technical documents regarding such conventional node control devices include, for example, Japanese Patent Laid-Open No. 2-78345.
There are publications, etc.

[0015]

[Problem to be Solved by the Invention] Since the conventional node control device is constructed as described above, the control signal 9 given to the switching means 8 is not forced to be output by a switch operated by an operator. , the control unit of the storage and forwarding device determines and outputs the accumulated amount of information waiting to be sent, and when the receiving node side accumulates a large amount of received information from a specific route, the corresponding route is There was a problem that it became difficult for information to reach through the network, and the efficiency of using communication network lines decreased.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a node control device that can efficiently utilize lines of a communication network.

[0017]

[Means for Solving the Problems] A node control device according to the present invention provides information to be transmitted to a predetermined node to either one of the respective transmitting means based on the determination result of the detour determining means, or causes the transmitting means to transmit the information to be transmitted to a predetermined node. The switching operation of the switching means, which switches whether or not to send information to one of the transmitting means without going through the determining means, is performed based on the monitoring by monitoring the difference in the amount of information received from each route at a predetermined node. It is something to control.

[0018]

[Operation] The switching means in the present invention monitors the difference in the amount of information received from each route at a predetermined node, and provides the information to be transmitted to the predetermined node to either one of the transmitting means via the detour determining means or directly. A node control device that can efficiently utilize lines of a communication network is realized by switching whether or not to provide the communication network based on the monitoring results.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 1 and 2 are transmission information storage units, 3
4 is a detour operation unit, 5 is a detour determination means,
Reference numeral 6 denotes a transmitter for B, and 7 a transmitter for C, which are the same or equivalent parts to those of the conventional system denoted by the same reference numerals in FIG. 4, and detailed explanations thereof will be omitted.

Reference numeral 10 denotes a reception information storage unit provided at a predetermined node to which information is to be transmitted, for example node C shown in FIG. 3, for storing reception information from one route, for example route a; Similarly, it is a received information storage unit that stores received information from the other route, for example, route b. 12 is provided in the node C, which is the predetermined node, and monitors the amount of received information stored in the received information storage units 11 and 12.
This is a received information amount determining unit that determines the difference in the amount of received information.

[0021] 13 periodically monitors the received information amount determination unit 12 of the predetermined node, recognizes the difference in the received information amount ascertained by the received information amount determination unit 12, and determines the information to be transmitted to the predetermined node. is given to either the detour action section 3 or the detour action section 4 based on the judgment result of the detour judgment means 5 for transmission, or it is given directly to the detour action section 4 without going through the detour judgment means 5 for transmission. This switching means is different from the conventional switching means 8 in that the switching between the two routes is controlled based on the difference in the amount of information received from each route at the recognized predetermined node.

Next, the operation will be explained. Here, since the basic operation is the same as that of a conventional node control device, its explanation will be omitted.

At node C, which is a predetermined node to which information is to be transmitted, when information is received from path a, it is stored in received information storage section 10, and when information is received from path b, it is stored in received information storage section 11. A received information amount determination unit 12 provided in the node C monitors the received information amounts accumulated in these received information storage units 10 and 11, and grasps the difference in the accumulated received information amounts.

[0024] In the node control device installed in the node A which is about to transmit information to this node C, the switching means 13 thereof periodically monitors the received information amount determining section 12 so that the node C can A predetermined node, that is, node C, is recognized based on the difference in the amount of received information received from C.
It is possible to switch between giving the information to be sent to the detour determining means 5 or directly to the detour operating unit 4.

In the above embodiment, the switching condition of the switching means 13 was explained using the difference in the amount of received information in the received information amount determining section 12 of a predetermined node, that is, the node on the receiving side. By using the remainder system of the number of detour routes as the congestion detour condition given to
It is also possible to realize efficient communication by distributing the load on each route.

FIG. 2 is a relay system diagram showing such an embodiment. If there are three routes to node C as shown in FIG. 2, information addressed to node C is sent to each route as a coset of "3".

[0027]

[Effects of the Invention] As described above, according to the present invention, the difference in the amount of information received from each route at a predetermined node is monitored,
Information to be sent to a predetermined node is transmitted to one of the respective transmission means,
Since the configuration is configured to switch between giving via the detour determining means and giving directly based on the monitoring result, the lines of the communication network can be used efficiently according to changes in the amount of information received by the receiving node. This has the effect of providing a node control device that can perform the following functions.

[Brief explanation of the drawing]

FIG. 1 is a functional block diagram showing a node control device according to an embodiment of the present invention.

FIG. 2 is a relay system diagram of a communication network for explaining another embodiment of the present invention.

FIG. 3 is a relay system diagram showing a communication network to which the present invention and a conventional node control device are applied.

FIG. 4 is a functional block diagram showing a conventional node control device.

[Explanation of symbols]

3 Transmission means (no detour operation unit) 4 Transmission means (detour operation section) 5 Detour determination section 13 Switching means In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] 1. Transmitting means for transmitting information to be transmitted to a predetermined node via a direct route directly connected to the predetermined node; and a detour route for transmitting information to the predetermined node via a node other than the predetermined node. a detour determining means for determining whether information to be transmitted to the predetermined node should be transmitted via the direct route or the detour route based on a predetermined congestion detour condition; The information to be transmitted to the predetermined node is given to one of the transmitting means based on the determination result of the detour determining means, or one of the transmitting means is transmitted without going through the detour determining means. and switching means for switching whether or not to transmit the information based on the difference in the amount of information received from each route in the predetermined node.