A Novel Adaptive Backoff Algorithm Based on Active Nodesfor Flying Ad Hoc Networks

In order to improve the tactical coordination ability of cluster unmanned aerial vehicles, extend their application scopes and effectively enhance the reliability and survivability in flying ad hoc network, a novel adaptive backoff algorithm based on active nodes is proposed in this paper. The backoff algorithm adopts a connection window adaptive mechanism in order for adapting loads dynamic change. Therefore, nodes connection window can be adaptively adjusted for reducing collisions under heavy loads. The two-dimensional Markov chain of the backoff algorithm is established and the node state transition probability under different loads are solved. Moreover, the expression of system throughput and mean delay are also deduced. Simulations show that the algorithm not only maintains a higher information success transmission rate under light loads, but also possesses the ability to effectively resolve connections under heavy loads.