CURRENT SPECIFICATION OF CONTROL MECHANISM FOR ABR SERVICES

František Szilagyi - Pavol Podhradský

   In ATM network environment congestion control plays an essential role to support different quality of services (QoS) guarantees for a large variety of traffic types. This paper presents an explanation of the new defined Available Bit Rate (ABR) service category. The ABR service is currently the subject of intense development. This new service will systematically and dynamically allocate available bandwidth to users by controlling the flow of traffic with feedback. The rate-based congestion control framework has been identified as the most appropriate for the support of this new service. An evolution of control mechanism for ABR service up to current specification is outlined.

Keywords: ATM, ATM service categories, Available Bit Rate, congestion control, traffic control

[full-paper]