Ad hoc网络中基于dsr路由协议改进的路由算法FETdsr,实现了在路由层跨层感知MAC层拥塞状况，从而选择拥塞较轻的路径。-Routing protocol for ad hoc networks based on dsr in NS2 simulation. Achieved in the routing layer cross-layer aware MAC layer congestion status, and thus choose less congested path