CONGESTION AVOIDANCE IN HIGH-SPEED INTERCONNECTED VOICE DATA TRAFFIC LANS

This paper presents congestion avoidance protocols in high speed inter connected LANs carrying both voice and data traffic. The networks are assumed to be interconnected by bridges. The protocols proposed rely o n the periodic transmission of MAC control frames, called congestion n otification frames, from the bridge to the source stations. Informatio n concerning the current bridge data buffering capacity and bridge voi ce queueing delay is carried by these frames. On the basis of that inf ormation, the source stations may block their data input traffic to th e network, thus allocating more bandwidth to voice and data traffic du ring periods of bridge overload. The performance of the protocols has been evaluated using simulation tools. Simulation results have shown t hat the proposed protocols can effectively prevent the bridge congesti on, thus providing improved bridge performance for both voice and data traffic.