Cellular-ad hoc network interoperation for coverage extension

In order to extend the cell coverage of upcoming cellular system, this paper proposes a novel routing algorithm based on ad hoc networking. The utilization of mobile ad hoc nodes as relays for calls designated to base stations greatly improves the flexibility of cellular networks. The protocol is able to extend the primary coverage of base stations with ad hoc networks based on a different radio interface. This increases the distance between adjacent base stations and reduces the cost of deployment. As networks do not require direct links between mobiles and base stations, they circumvent shadowing effects and therewith simplify base station positioning. Simulations shows that the approach outperforms existing ad hoc network protocols with regards to packet loss and routing overhead.