As discussed in the previous chapters, the definition of each cellular standard has been driven by a set of key use cases.
Their evolution was driven by market requirements. Building on analog technology, 1G was designed for voice only. The step to digitization was achieved in the context of its evolution to 2G, offering improved voice and text messaging. 3G was designed to support integrated voice as well as low-cost and low-data mobile Internet. The current cellular system, 4G, represents ...