A comparative study of interworking methods among differents rats in 5G context

Abstract

The 5G network is a Heterogeneous network, which combines different types of infrastructures and different standards such as WLAN, WIMAX, 3G, 4G, operating in different frequencies, and having different architecture. The implementation of Heterogeneous architectures trend to enhance the coverage and the capacity of the network, and boost spectral efficiency. The integration of these architectures poses several challenges, the major one is Vertical handoff. It consists of transferring an ongoing session from a standard to another. Also this implementation requires a flexible architecture to incorporate multiple Radio Access Technologies (RATs) and facilitate the interworking between them. This work presents the 5G network architecture and some enabling key techniques it presents also a review of interworking methods, and introduces a new interworking technique among Long Term Evolution (LTE) and WiMax. Simulation results show the capacity of our methods to offload flows from different RATs.