改进的多约束QoS多播路由算法

In wireless ad hoc networks,bandwidth and node's energy were not taken into consideration in the process of constructing the multicast tree for GEM (GEographic Multicast) protocol ,which may result in high node mortality and short lifetime of the network. To solve this problem, through the improvement of the original routing algorithm and adequate experiments, a new argument was proposed with multiple QoS(Quality of Service) constraints to meet the demand. During the construction of the multicast tree, which was used for data transmission,the QoS guarantee was provided through the constraints of the bandwidth and the node's energy when selecting next relay node. The experimental data shows that the new routing algorithm can optimize the link bandwidth and reduce the node mortality, which may prolong the network lifetime.