水下传感网络中基于转发节点协作数据传输策略

Fowarding Node-based Cooperative Transmission in Underwater Sensor Networks

协作路由能缓解水下环境的严厉信道影响,确保数据包的可靠传递率。为此,提出转发节点协作数据传输策略(Fowarding node-based cooperative transmission,FCT)。FCT路由先依据节点的水压和位置信息,选择下一路转发节点,再依据转发节点选择协作节点。最终,通过协作节点的协作转发数据包,提高数据包传递率。同时,依据接收信号信噪比判断是否数据传输成功。一旦未能正常传输数据包,就进行重传,尽可能地确保信宿收集更多的数据。仿真结果表明,提出的FCT路由提高了数据包传递率。

Cooperative routing mitigates the adverse channel effects in the harsh underwater environment and ensures reliable delivery of packets Cooperative routing mitigates the adverse channel effects in the harsh underwater environment and ensures reliable delivery of packets. Therefore,Fowarding node-based cooperative transmission( FCT) mechanism is proposed in this paper. FCT combines location and depth of the sensor nodes to select the next-forwarding nodes. Then,the comperative nodes is selected. Finally,the packet is forwarding by comperative nodes. The packet transmission ratio is improved. The signal to noise ratio of the received signal is used to determine whether the data transmission is successful. If a packet cannot be transmitted properly,it is retransmitted to ensure that the host collects as much data as possible. Simulation results show that FCT protocol has a good performance in terms of packet delivery ratio.