 for further evolution. The system supports reconfiguration/ dynamic configuration, dynamic update of the system function and signal process- ing algorithm (reloadable), remote update through network, and the OTA (over- the-air) and dynamic update technologies for the signal processing and control software of the MT. © 2009 by Taylor & Francis Group, LLC Evolution from TD-SCDMA to FuTURE 2.2.3.2 Multicell and Multiuser Trial Network The 4th Generation Mobile Communication System of the FuTURE TDD plan and the corresponding field trial system were checked and accepted in Shanghai City in October 2006 by a group of experts from the Ministry of Science and Technology of China, the Ministry of Information Industry of China, the Chinese Academy of Sciences, and the Chinese Academy of Engineering. They verified that the first B3G TDD system of China was implemented successfully. The field test results of the corresponding trial system had already validated its advantages in the aspects of multicellular network, support for high mobility, and high-speed data service. In the research and development of the FuTURE TDD system, a series of advanced technologies was adopted, such as distributed network architecture based on RoF, slide handover, soft fractional frequency reuse, modular MIMO, and future generation computer services (FCGS). Also, the first 4G field trial system based on a distributed radio network was established in Shanghai, where a scheme of a combined network of TDD and FDD was introduced and then some key technologies in the system were analyzed, including the unification of software and hardware trial platform, wide coverage for 40- to 100-Mb/s data rate, a high mobil- ity test, spectrum efficiency of 2-10 b/s/Hz, low power consumption, and good electromagnetic compatibility (EMC) performance. Figure 2.11 shows the overall structure of FuTURE TDD trial systems, with three APs and three MTs included, where the distributed network structure was Internet gateway Internet gateway Internet gateway Internet Inte