Date Added: May 2012
IP Multicasting has been, and still is, an interesting research topic. The Internet is likely been organized with both unicast and multicast enabled networks. Thus utmost importance is given to design protocols that allow the progressive deployment of the multicast service by supporting unicast clouds. This paper gives HBH (Hop-By-Hop multicast routing protocol) through REcursive UNIcast Tree (REUNITE). HBH adopts the source-specific channel abstraction to simplify address allocation and implements data distribution using recursive unicast trees, which allow the transparent support of unicast-only routers. An important original feature of HBH is its tree construction algorithm that takes into account the unicast routing asymmetries.