Implementation of the OBAMP overlay protocol for multicast delivery in OLSR wireless community networks

The Optimized Link State Routing (OLSR) protocol is widely employed in Wireless Community Networks (WCNs), where users are connected to a wireless backbone with high bandwidth links. In these networks users can access both the Internet and internal network services. However the routers lack multicast support and users cannot exploit the high capacity of wireless links to stream and receive multimedia services. We implemented an extension to the OLSR protocol to support the delivery of multicast traffic using the Overlay Borovka-based Ad-hoc Multicast Protocol (OBAMP). We present a demo of our implementation that is devised for the GNU/Linux operating system. The implementation has been tested both on standard PCs and on embedded devices running OpenWRT and it is distributed as a plugin within the olsr.org OLSR implementation. This protocol enhancement makes possible to create a multicast distribution tree among a subset of nodes, providing the mesh users with multicast community services.