GMNF-DVMRP: a modified version of distance vector multicast routing protocol

In this paper, we make a survey of distance vector multicast routing protocol (DVMRP) and find that it is not optimal in the aspect of network cost (NC). Therefore, we propose a modified version of DVMRP, called "group membership near first-DVMRP" (GMNF-DVMRP), to decrease the NC of the multicast tree formed by DVMRP. A simulation is implemented to compare our modified version and the original DVMRP. We find that our method save about 5-7 percent of NC of the multicast tree formed by DVMRP.