QoS in ATM: theory and practice

We consider joint traffic management of variable and available bit rate (VBR, ABR) services for ATM networks. For VBR service we consider loss sensitive call admission for virtual trunks of such traffic. For ABR traffic we propose a flow control mechanism based on measurement of the current queue length and bandwidth availability as well as tracking the current activity level of sources, to adjust an explicit bound on the source transmission rates. Integration is considered by assessing the impact that call admission and bandwidth sharing could have across services types.