PURPOSE: To use efficiently buffers, by setting the number of assigned buffers on the basis of the quantity of input information designated by an information source and monitoring use conditions of buffers to control the regulation of input information.
CONSTITUTION: Input information quantity reproting devices 9-i (i=1Wm) are provided in an exchange device 11 in accordance with communication lines 5-i, and the quantity of input information reported to the device 11 through lines 5-i is transmitted to congestion controller 41-i. A congestion monitoring part 61 of the device 41-i calculates a congestion monitor reference value on the basis of the quantity of input information and monitors buffers 2-1W2-n where telegraphic messages from lines 5-i are accumulated; and when the number of buffers which are filled up with telegraphic messages exceeds a prescribed ratio to the reference, a congestion signal is sent to an input regulating part 7 through a switching part 8. A buffer monitoring device 10 added to a buffer controller 3 monitors use conditions of buffers overall, and the device 10 sends a regulation effective signal to regulating part 7 when the number of used buffers exceeds a prescribed value X, and the device 10 sends a regulation ineffective signal to regulating parts 7 when the number of used buffers becomes a prescribed value Y smaller than X; and thus, the number of used buffers is managed elastically.
IWAZAWA YUUICHI
INOUE NOBORU
KOBAYASHI HIROSHI
KOKUSAI DENSHIN DENWA CO LTD
| JPS5585158A | 1980-06-26 | |||
| JPS56121138A | 1981-09-22 | |||
| JPS51131228A | 1976-11-15 |