A Reverse Shortest Path Tree-Based Multicast Joining Node Selection Method

Network layer multicast is a powerful method for transmitting data from sources to multiple group members. When joining group, member first sends request designated router (DR). Then, the DR selects node in existing tree (known as node, or MJN) establish distribution path MJN itself. The selection runs on and has significant impact of tree, that directly affects load network. However, current cannot effectively detect status downlink case asymmetric routing, leading network congestion limiting number groups can accommodate (multicast capacity). To solve this problem, we propose an based reverse shortest (RSPT). RSPT paths routing asymmetry. Based detection results RSPT, select with lowest join tree. Our experimental indicate compared methods, our lower cost delay, balance increasing capacity by more than two times.