Vision for 2020

摘要: Mobile and wireless communications provide today high global penetration especially for voice lower rate data services. In future such systems will be applied in many different usage scenarios from mobile stationary applications radio environments communication relations between humans machines. Today types of are being application areas. future, mainly designed a user-centric perspective. The vision is based on an integration cooperation cooperating access heterogeneous environment at packet-based core network. ITU-R provided this basic requirements already 2003, which the basis preparation World Radiocommunication Conference (WRC 2007) potential identification additional frequency spectrum. addition, international bodies communities developed general statements development identified necessary research Availability sufficient spectrum issue with user throughput versus Quality Service full area coverage. Limitations availability wideband may change role models operators potentially result infrastructure sharing. last years huge activities have been launched Asia, Europe North America, were originally triggered by following similar technical approach. There also parallel ongoing IT sector scenarios. These developments to consider economic trends deployment fixed line systems. This as Fixed-Mobile-Convergence (FMC) competition and/or increasing use IP has considered system design. With respect deployed expected evolve existing emerging However, all players prepared disruptive driven new players. paper overview these towards