  The rapid advancement of 5G networks and the upcoming transition to 6G
necessitate the use of the Open Radio Access Network (O-RAN) architecture to
enable greater flexibility, interoperability, and innovation. This shift
towards 6G and O-RAN requires the development of advanced simulation tools for
testing, analyzing, and optimizing Radio Access Network (RAN) operations. This
need becomes critical due to the complex dynamics of mobility management
inherent in the 6G vision and next-generation networks. These networks
anticipate advanced handover methods for mobile users, UAVs, IoT devices, and
beyond. Addressing this gap, this paper introduces RANFusion: a robust RAN
simulator specifically created to explore a variety of handover scenarios and
to test and balance resources between users. This tool enables precise
simulations for refining handover strategies within RAN and O-RAN environments,
thereby ensuring optimal performance and reliability in these advanced network
infrastructures.
