LpMAC: A MAC Protocol Based on Valid Prediction of the Next Hop Link in Highly Dynamic Network

摘要

Highly dynamic network has a growing demand with the popularization and application of high-speed mobile equipments, such as aircraft, unmanned boat and etc. There are many new features for highly dynamic networks over mobile networks, which include high link failure rate, high frequency enter-and-exit the network and frequent changes of the topology. Therefore, the design of access protocols is more stringent. Particularly, the packets would be invalid when waiting to be sent to the next hop node due to the link breaking with high- speed motion of the nodes in highly dynamic network. In order to better adapt to highly dynamic network scenarios, we propose a novel access protocol based on link validity prediction. Firstly, the protocol obtains the valid time of the packet in the buffer by considering the validity of the next hop link. Further, we designed a backoff mechanism based on packet valid time differentiation. We derive the mathematical expressions for the performance metrics. The performance evaluation exhibits our protocol by providing a lower latency and higher success transmission rate.