The Transactions of the Korean Institute of Electrical Engineers (대한전기학회논문지)
- Volume 37 Issue 11
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- Pages.826-833
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- 1988
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- 0254-4172(pISSN)
Overload Control Algorithms for the Stored Program Control Switching System
축적 프로그램 제어교환기의 과부하 제어 방식에 관한 연구
Abstract
In this paper we studied the control of overload which could bring the degradation of performance and threaten the stability of the electronic switching system. In order to get the essential requirement for overload control algorithm, we tried to extract the characteristics of commonly used algorithms by means of simulating overload control alogrithms in numerical stored program control switching model. As the result, we could find that the overload control algorithm which monitored the CPU occupancy had the best call complete rate and good response characteristecs and the algorithm using the offered load as a system state variable had a good grade of service which was represented by a short dial tone delay and 3rd quartile of deal tone delay. however, these control algorithms have no generality and need to get the control parameters by the trial-and-error method. We suggested the guidelines on the design of the overload control algorithm.
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