Performance Evaluation Models for Stress and Stretch of Overlay Network Multicast

It is presented the stress equilibrium model and the stretch eigen-value model for evaluating the performance of overlay network multicast protocols. The stress equilibrium model uses the discrepancy criteria of uniformity measurement to measure the distribution of stress in multicast trees. By looking for the areas where stretch values are dense, the stretch eigen-value model judges optimization degree of multicast paths. Experiments results based on simulations show that the two models can reflect the performance of stress and stretch well for multicast protocols with overlay network.