Analysis of Different Approaches in Separation of Elastic and Inelastic Traffic

Article shows, that separation of traffic and use of appropriate queue management method can be a solution to problem of coexistence of elastic and inelastic traffic. The paper familiarizes with problem of coexistence of different types of traffic, presents two queue management methods and shows simulation results of protocols performance when elastic and inelastic traffic is enqueued into separate queues. Three cases were considered. In first both queues have the same size and both use tail drop. In second, both use tail drop but have different sizes. In third, queues have the same size but use different queue management methods - tail drop for "inelastic" queue and RED for "elastic" queue. Simulations results shows that separation of traffic ensures that in time of congestion elastic flows wonpsilat be throttled down by inelastic traffic. Use of RED gives better access to resources to inelastic traffic ensuring smaller number of lost packets.