冲突避免的水声网络拓扑发现协议

When all nodes of an underwater acoustic network (UAN) are deployed in the target region, each node knows nothing about the new network except its own node ID, so a network topology discovery protocol that can complete nodes and links discovery for all nodes is necessary and significant. The efficiency of the underwater acoustic topology discovery protocol often depends on the choice of the channel access strategy, but it cannot completely use the existing underwater acoustic multiple access control (MAC) protocols. Because it is in the initial stage of the network establishment, the access strategy needs to be designed according to the special state of this stage. An efficient collision-free topology discovery protocol (named CFVE) for UAN is proposed. This protocol makes use of the uniqueness of the node ID in the network, and the nodes access the channel in their specific time slot, and then exchange the discovery control packets without conflicts, and finally realize the discovery of all links and nodes in the network. Simulation results show that the CFVE effectively reduces energy consumption and decreases discovery delay and accurately obtains the whole network topology during the network topology discovery. The proposed CFVE protocol is a suitable network topology discovery mechanism for UANs.