To support mobile subscribers in pub/sub systems, existing approaches are mainly based on reactive methods (i.e., the message transfer occurs just after the mobile subscriber handoffs to a new broker). In this paper, we analyze a novel and efficient mobility extension based on a pro-active approach (i.e., the context transfer/caching occurs prior to the subscriber movement). We implemented both reactive and pro-active mobility extensions for JMS and conducted a range of experiments in a small testbed to compare the relative merits of each approach. Our experimental results show that a pro-active approach can provide fast handoff support with zero duplicated messages. It also achieves relatively higher throughput results and lower message loss compared to the reactive approach.

doi.org/10.1109/WiMob.2008.19
4th IEEE International Conference on Wireless and Mobile Computing, Networking and Communication, WiMob 2008
Department of Systems and Computer Engineering

Gaddah, A. (Abdulbaset), & Kunz, T. (2008). Subscriber mobility in pub/sub systems: Pro-active vs. reactive handoffs. Presented at the 4th IEEE International Conference on Wireless and Mobile Computing, Networking and Communication, WiMob 2008. doi:10.1109/WiMob.2008.19