Asynchronous Transfer Mode Call Admission Control Scheme with Plural Quality Classes.

In an asynchronous transfer mode (ATM) network, various calls with different transmission quality requirements ranging from tow bit-rate data signals to high bit-tare motion picture signals are applied. Therefore, it is important to determine how to allocate network resources to those calls and to judge whether those calls can be accepted. This paper proposes a can admission control scheme based upon a data table that holds the relationship between average bit-rate and needed bandwidth for aggregated signals in each quality class obtained beforehand by simulation. This proposed scheme assumes broadband services where the aver-age bit rate and burstiness of aggregated signals can be estimated clearly with predictable value ranges. This proposed scheme uses a conventional scheme for service quality class control. The following characterizes this proposed scheme: (1) it is suitable for real time call processing because it has small table search processing and a simple table search algorithm; (2) it realizes more accurate control due to a decreased data volume requirement and more precise data preparation than is the case for some of the conventional schemes; (3) it can be expanded easily to handle increases in the number of quality classes; and (4) it provides control in terms of statistic multiplexing effects between each quality class (also found in some of the conventional schemes). [ABSTRACT FROM AUTHOR]