Broadcast channel reliable transmission method under CSMA/CA mechanism

The invention discloses a broadcast channel reliable transmission method under a CSMA/CA mechanism. The method comprises the step of after a node receives a broadcast frame sent by a neighbor node, if the new broadcast frame sent by the neighbor node is still not received after a threshold of a broadcast frame sending period of the neighbor node, requesting the neighbor node to retransmit the new broadcast frame. According to the method provided by the invention, the problem of loss of the broadcast frame is effectively solved, pressure to network rapid convergence and route updating work caused by loss of the broadcast frame under the condition that network capacity becomes large and the neighbor nodes in a node coverage range are increased can be copied with, and the effect is more prominent in a multi-channel ad hoc network and a Mesh network. 本发明公开了种CSMA/CA机制下的广播信道可靠传输方法，节点收到邻居节点发送的广播帧后，如果经过该邻居节点发送广播帧的周期门限之后仍未收到该邻居节点发送的新的广播帧，则向该邻居节点请求重传新的广播帧。本发明有效解决了广播帧丢失的问题，能够应对当网络容量变大、节点覆盖范围内邻居节点增多的情况下，广播帧丢失给网络快速收敛及路由更新