<FONT face=Verdana>With regard to the problem of great data loss rate in the multicast application in wireless mesh network

it is specially valuable to use the way of M2U(Multicast to Unicast) in which packet’s MAC destination domain is modified in order that packet can be delivered to certain members of multicast group by unicast.With the increase of multicast group member

data loss rate is rising.In order to ensure the network performance not to be affected

M2UO(Multicast to Unicast Opportunistic Routing) scheme can be put forward

in which packet can be delivered to candidate nodes by unicast and to other nodes by multicast.A great many experiments in the real network indicate that the new scheme can decrease the packet lost ratio

can increase throughput and has a better video effect.