Mobility-Aware Topology Manager for Publish-Subscribe Networks

In this work we analyze the effect of mobility on publish-subscribe based topology management and the computation of the data delivery paths. We take as a reference the WiMAX architecture enhanced with publish-subscribe features. In order to optimize the network operation we enrich the topology management functionality of the publish-subscribe network with a set of mobility prediction mechanisms. We elaborate various factors that influence the performance of the prediction function. We indicate the critical aspects of applying the prediction function and discuss the impact of such issues on overall system performance. Moreover, we examine the trade-off between the advantages offered by mobility prediction in the publish-subscribe context, compared to the signaling and complexity overhead. Despite the challenges posed by mobility, our work shows that the users´ throughput in publish- subscribe networks can be improved by incorporating intelligent mobility prediction strategies into topology management functionality.