A Threshold-Based Predictive Scheme for Mobile Subscribers in Publish/Subscribe Systems

In this paper, we present our strategy adopted to deal with the mobility into publish/subscribe. Specifically, we focus on the management of the mobile users from one broker to another. In fact, the topic of mobility into publish/subscribe systems may cause many problems such as the increasing of the traffic into the network and the messages loss. To overcome these problems, we have created a selective scheme on the basis of an accurate selection. In fact, a threshold value is devoted to be the criterion for the selection of caching points. On the basis of this principe, we apply various network settings to explore the effectiveness of our approach. Hence, we extract the improvement of our approach on the messages loss, the caching cost and the propagation cost in function of buffer size, publication rate, period of disconnection and connect time.