With the recent wireless boom and the IP convergence, there is a need to support efficiently a lot of concurrent small group multicast flows. In this paper, we describe how to integrate mobility support to a Small Group Multicast routing protocol named Sender Initiated Multicast (SIM). We then compare it with PIM-SSM through simulation and show that SIM requires fewer router states than PIM-SSM for small groups with static and mobile receivers.
Brouckaert, X., & Bonaventure, O. (2004). Supporting mobility in multicast: A compromise between large and small group multicast. Lecture Notes in Computer Science, 3311, 120-129. https://doi.org/10.1007/978-3-540-30493-7_11 (Original work published 2004)