Abstract: Aim To study and design a protocol used in a mobile multihop packet radio network(PRN) Methods Exchanging adjacent tables between nodes monitors the radio connectivity The topological change of network is followed by updating the link state table of nodes The computation of the shortest path makes use of the Dijkstra algorithm Results Implementation of the protocol takes advantage of the property of broadcast channel,improves utility efficiency and enhances the feasibility of the network Conclusion The radio shortest path first routing protocol is available for PRN