Dynamic bandwidth allocation scheme for multimedia data over asynchronous transfer mode networks

Admission control and bandwidth allocation mechanisms have been widely investigated for asynchronous transfer mode (ATM) networks. The criteria for a new call to be accepted should guarantee the required performance for the new call without degrading the quality of service of the existing calls. In order to efficiently manage the network resources, an architecture for a structured logical partition of network resources among traffic classes with different grades of service has been proposed by Bolla et al. in 1993. In this paper, a new dynamic bandwidth allocation scheme called the minimum overflow traffic block algorithm (MOTA) is proposed to assign the bandwidth for each traffic class in the hierarchical admission control structure in an ATM network. The traffic types can be video, image, voice, and so on. An overflow traffic function Q is used to adjust the bandwidth assignment each time a new connection is required. This algorithm sets the mean blocked traffic over the ATM link as the optimization object function Q and adjusts the bandwidth assignment to each traffic class by optimizing Q. This paper uses mean cell loss probability as the quality of service (QoS) for the performance measurement of the system. This novel approach can minimize the mean cell loss probability of the system by optimizing Q when the cell delay constraints are satisfied.