JPH0537633A - Exchange having redundant configuration - Google Patents

Abstract

PURPOSE:To lighten the load of an active system equipment by allowing a line changeover device to accommodate part of lines in the active system into the standby system when the line changeover device receives a congestion predict notice from a congestion prediction detector detecting congestion prediction. CONSTITUTION:The system is provided with plural exchanges 1,2 for the active system and the standby system and traffic management sections 10,20 obtaining a line traffic per unit time in the exchanges 1,2. The system is also provided with a congestion prediction detector 3 predicting the congestion before the occurrence of congestion from the line traffic obtained by the traffic management sections 10,20 and a line changeover device 4 controlling the state of line accommodation resulting from accommodating part of lines in the active system to the standby system. Moreover, when the line changeover device 4 receives the congestion prediction notice from the congestion prediction detector 3 detecting the congestion prediction, the line changeover device 4 accommodates part of the lines in the active system to the standby system.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switching device having a redundant configuration for load balancing.

[0002]

2. Description of the Related Art A conventional switching device having a redundant structure uses only a standby system device at the time of a failure, and does not have a switching control to a standby system device for distributing line processing which causes a load increase at the time of congestion. , The flow control was used to regulate communication and load control was only performed.

[0003]

In the load distribution in the switching device having the above-mentioned conventional redundant configuration, even if congestion occurs, the load control is performed by restricting the communication by the flow control. Data resends,
There is a problem that a delay occurs or communication is impossible.

The present invention has been made in view of the above problems, and it is an object of the present invention to reduce the load on an active system device in a switching device having a redundant configuration.

[0005]

To achieve this object, a switching device having a redundant configuration of the present invention comprises a plurality of switching devices of an active system and a standby system, and a unit time in each switching device. A traffic management unit that determines the amount of line traffic per unit, a congestion prediction detection device that predicts congestion before the occurrence of congestion from the line traffic amount that is requested by the traffic management unit, and a line that accommodates a part of the active line in the standby system A line switching device that controls accommodation, and when the line switching device receives a congestion prediction notification from the congestion prediction detection device that detects the congestion prediction, the line switching device waits for a part of the working line Is configured to be housed in.

Further, preferably, the line traffic amount per unit time is compared with the congestion prediction judgment value, and when the congestion prediction judgment value is exceeded, the congestion occurrence is predicted from the growth rate of the traffic amount.

[0007]

In the switching device having the redundant configuration as described above, when the line switching device receives the congestion prediction notification from the congestion prediction detecting device that has detected the congestion prediction, the line switching device causes a part of the active line The standby system is accommodated to reduce the load on the active system device.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block connection diagram showing an embodiment of a switching device having a redundant configuration according to the present invention. FIG. 2 is a flow chart for explaining the operation of the exchange having the redundant configuration according to the present invention. In FIG. 1, a switching device having a redundant configuration according to the present invention includes switching devices 1 and 2 and traffic management units 10 and 2 in the switching devices 1 and 2, respectively, for obtaining the line traffic volume per unit time.
0, and a congestion prediction detection device 3 that predicts congestion before congestion occurs
And a line switching device 4 for controlling line accommodation.

Next, the operation procedure of the exchange having the redundant configuration according to the present invention will be described with reference to FIG. 2 in combination with FIG. 3 and FIG. In the following description, it is assumed that the exchange device 1 is the active system device and the exchange device 2 is the standby system device. 2, the congestion prediction / detection device 3 shown in FIG. 1 reads the line traffic amount per unit time from the traffic management unit 10 of the switching device 1 which is the active system device (step 101), and stores all lines accommodated in the device. Traffic amount is calculated (step 102), and the result 1000 is compared with the congestion prediction judgment value 1001 (step 103). Then, when the result 1000 <the congestion prediction determination value 1001, the process immediately returns to step 101.

On the other hand, the result 1000 ≧ congestion prediction judgment value 10
When the condition of 01 is satisfied, the traffic growth rate is obtained, and the next traffic volume is predicted from the obtained traffic growth rate (step 104). The result 2000 is compared with the congestion judgment value 2001 (step 105), and the result 2
If 000 <congestion determination value 2001, the process immediately returns to step 101. When the condition of 2000 ≧ congestion determination value 2001 is satisfied, a congestion prediction notification is sent to the line switching device 4 (step 106).

The line switching device 4 which has received the congestion prediction notification
Switches the line 13 having a high traffic volume per unit time shown in FIG. 3 to the traffic management unit 20 which is a standby system device to reduce the load on the traffic management unit 10 which is a current system device (step 107).

[0012]

As described above, according to the switching device having the redundant configuration of the present invention, a plurality of active and standby switching devices and line traffic per unit time in each switching device are provided. A traffic management unit that determines the traffic volume, a congestion prediction detection device that predicts the congestion before the congestion occurs from the line traffic volume that is requested by the traffic management unit, and some lines of the active system are accommodated in the standby system to control the line accommodation. A line switching device is provided, and when the line switching device receives a congestion prediction notification from the congestion prediction detection device that detects the congestion prediction, the line switching device accommodates a part of the working line in the standby system. Is configured. With this, when the line switching device receives the congestion prediction notification from the congestion prediction detecting device that detects the congestion prediction, the line switching device accommodates a part of the lines of the active system in the standby system, so that the active system device It is possible to reduce the load of.

[Brief description of drawings]

FIG. 1 is a block connection diagram showing an embodiment of a switching device having a redundant configuration according to the present invention.

FIG. 2 is a flowchart for explaining the operation of the exchange having a redundant configuration according to the present invention.

FIG. 3 is a memory configuration diagram showing a line traffic amount per unit time in a traffic management unit 10 or 20 of a switching device having a redundant configuration according to the present invention.

FIG. 4 is a characteristic diagram for explaining a congestion prediction operation in the congestion prediction detection device 3 of the exchange having a redundant configuration according to the present invention.

[Explanation of symbols]

1 exchange device 2 exchange device 3 Congestion prediction detection device 4 line switching device 10-20 Traffic Management Department 11-15 lines

Claims (2)

[Claims] 1. A plurality of active and standby switching devices, a traffic management unit for determining the line traffic amount per unit time in each switching device, and a line traffic amount determined by the traffic management unit. Congestion prediction detecting device for predicting congestion before congestion occurs, and a line switching device for accommodating a part of the working line in the standby system and controlling the line accommodation, the congestion prediction detecting device detecting the congestion prediction An exchange device having a redundant configuration, characterized in that, when the line switching device receives a congestion prediction notification from the line switching device, the line switching device accommodates a part of the working line in a standby system. 2. The line traffic volume per unit time is compared with a congestion prediction judgment value, and when the congestion prediction judgment value is exceeded, the occurrence of congestion is predicted from the growth rate of the traffic volume. Switching device having a redundant configuration of.