UASNs Hybrid Receiver And Sender Initiated Traffic Adaptive MAC Protocol

As one of the core components of Underwater Acoustic Sensor Networks(UASNs),the Medium Access Control(MAC)protocol is used to realize the sharing of channels by multiple nodes to prevent collisions during transmission.The hybrid MAC protocol in UASNs achieves the fusion of different types of MAC protocols and handles more complex network loads.But how to adapt to the dynamically changing network load in UASNs is an important issue to be solved in the design of hybrid MAC protocol.In response to the above problems,this paper proposes a Hybrid Receiver and Sender Initiated Traffic Adaptive MAC protocol(HITA-MAC).The HITA-MAC is composed of Sender Initiated sub MAC protocol(SIS-MAC)and Receiver Initiated Sub MAC protocol(RIS-MAC),using their respective advantages handles different load situations in underwater networks,and introduces flow self-adaptation methods in the protocol,and establishes A method for selecting the transmission initiator based on traffic self-adaptation,the current network traffic load is judged.According to the judgment result,the switch between the sub-protocols is realized,and the sub-protocol suitable for the current traffic load situation is selected,which enhances the adaptability of the protocol to the dynamically changing traffic load and improves the network performance.In this paper,the HITA-MAC protocol is simulated under the NS-3 simulation platform.Compared with the existing MAC protocols,this protocol increases the throughput,reduce energy consumption and end-to-end delay as much as possible,and has stronger adaptability to dynamically changing load.