Parameter Optimization for Asynchronous Transfer Mode Leaky Bucket PolicingAlgorithm

摘要

Asynchronous Transfer Mode (ATM) promises bandwidth on demand with guaranteedquality of service (QoS) to transport and switch broadband integrated services in a statistical shared environment. QoS deals with specified cell-loss probability or cell-delay variation. It is an extremely difficult task to manage different traffic requirements on the same link. For example, a voice application sends data at low rates and is sensitive to transport delay and jitter while a text editing application is typically bursty, requires large buffers, and is not sensitive to transport delay variations. To ensure QoS, some traffic control mechanism is required, and in ATM this process is called Connection Admission Control (CAC). The ATM standards are still evolving and new control mechanisms are being considered for use in ATM. The current ATM policing and admission control standard is based on a continuous fluid flow model.