UK. 9.12.2.5.1 System Overview and Performance The T-DMB standard only supports a channel bandwidth of 1.712 MHz and a modulation scheme of Differential QPSK. Due to these two attributes its performance is lower than both DVB-H and MediaFLO systems. T-DMB uses OFDM-based modulation scheme and supports multiple sub-carrier configurations (0.25K, 0.5K, 1K, and 2K) that allows adaptation to several deployment scenarios. A technique for power sawing based on micro time slicing is incorporated into the standard. MPE-FEC on the other hand is not supported. It does support MPEG-2 transmission mode and AVC/H.264 audio video standard. T-DMB can support up to 2.3 Mbps in a 1.712 MHz channel in theory, but in practice it might only achieve 1.5 Mbps. T-DMB is a small scale system which is cost efficient when the total demand for broadcasting is small. 9 H.264 is a standard for video compression, and is MPEG-4 AVC (for Advanced Video Coding). 10 Switching time refers to the time it takes for the users to switch from one live channel to other. Next Generation Mobile Communications Ecosystem 9.12.2.6 ISDB-T ISDB-T (Integrated Services Digital Broadcasting - Terrestrial) is an ARIB¹¹ OFDM based standard for television broadcasting. It systematically integrates various kinds of digital contents, each of which may include HDTV, SDTV, sound, graphics, text and SO forth. ISDB-T can also be used to broadcast services to handheld mobile units. The first commercial deployment of ISDB-T took place in Japan by NHK (Nippon Hs Kykai - Japan Broadcasting Corporation) on December 1, 2003. It is mainly used in Japan and has limited deployments in Brazil. ISDB-T is standardized by ARIB in 2005 as STD-B31 (Version 1.6-E2) Transmission System for Digital Terrestrial Television Broadcasting [26]. 9.12.2.6.1 System Overview ISDB-T uses the 470-770 MHz UHF band allocating 50 channels each occupying 6 MHz of bandwidth. These 50 channels, ch.13-ch.62, are called physical channels. ISDB-T divides the frequency band of one channel into thirteen segment