Performance Comparison of ATM Policing Mechanisms with Telecommunications Traffic

摘要

Asynchronous Transfer Mode (ATM) is considered a leading technology for transporting multimedia (including voice, video, and data) over wide area networks. One of the most challenging problems to solve prior to the deploymnet of ATM networks is traffic management and congestion control. ATM can employ traffic policing or usage parameter control (UPC) to monitor and enforce connection's traffic descriptor. When an arriving cell violates its connection's contract, a network policer either discards the "non-conforming" cell or marks it as low priority class cell. This prevents heavily loaded connections from compromising the performance of other connections, and significantly improves the network's ability to predict and guarantee each connection's quality of service. This paper focuses on evaluation and comparison the performance of several traffic policing mechanisms including Leaky Bucket (LB), Jumping Window (JW), Triggering Jumping Window (TJW). Also the proposed mechanism, "Variable Rate Token (VRT)" has been compared by varying the token size and token rate correlating with particular telecommunications traffic.