Abstract: The dynamic topology of a mobile ad hoc network poses a real challenge when designing the routing protocol, especially in high-dynamic environments. In this paper, a new routing protocol was proposed that is based on on-demand and greedy forwarding. This protocol proposes three opinions to RGR, i.e., through scoped flooding to decrease control overhead in route discovery phrase, through mobility prediction to monitor the condition of the reactive path and help nodes choose the proper next-hop in the GGF phrase and through delayed route requests to reduce unnecessary waste of network resources. In contrast to RGR, AODV, Modified-RGR, and Optimized-RGR simulation, the results show the improved RGR not only has a high packet acceptance ratio, but has a low normalized routing overhead and an average end-to-end delay.