Evaluation of Source Policing Functions with Strict Enforcement Policies in ATM Networks
In ATM networks, source policing functions are crucial for ensuring that user traffic does not exceed the negotiated quality of service. Many different source policing functions have been proposed, including the well known Leaky Bucket scheme [1]. However, recent studies have shown that there are a number of problems in using this scheme. One criticism is that it does not penalize violating traffic sufficiently to reduce its impact on non-violating traffic source [2]. The purpose of this paper is to evaluate modifications to the Leaky Bucket scheme which will enforce the policing function more strictly, and compare with some other proposed techniques such as the Peak Counter scheme [3]. Since analytical analysis is in most cases intractable, simulation is the main tool for this study.
Risk problem of security companies has become more and more serious and it affects the development of capital market in China.This paper classifies the risk into three aspects.Then,it discusses the ways to improve the risk management system of security companies,such as,reconstruction of the programs of risk management operation and the structure of risk management,construction of risk early warning system and improvement of company governance.