Abstract
One of the main centrepieces in the next generation of cellular wireless communication networks is to always provide seamless network connectivity on the top of high-speed data rate and network availability. The emerging fifth-generation (5G) is expected to drastically improve the market demand in terms of higher data rates, excellent user coverage, superb end-to-end connection with very low-latency and ultra-reliability. Even though existing mechanisms such as handover and roaming procedures have already introduced possible solutions in previous generations, mobile users still suffer from delays during network switching in cross border situations. This paper summarizes the research being done on service continuity cross border for different generations of cellular wireless communication networks and demonstrates the benefits that 5G brings to service continuity use cases in the context of a European project. Opening challenges remain highlighted and guidelines are provided to modify the current schemes to address these limitations.