5G
Cellular communications has evolved from 1G to 4G to cater for the various service offerings of voice communication, data exchange and web browsing. The coming generation, 5G, is aiming at the wider concept of the Internet of things (IoT). A broad consensus by industry and standards organizations is to introduce 5G around 2020 time frame. This chapter will overview 5G as a necessary platform for the success of the IoT. It provides an overview of 1G to 4G evolution and the demand issues behind 5G while discussing deficiencies of 4G LTE which prohibits it from rising up to the challenges presented in IoT. On the path to 5G, the chapter outlines the 5G Vision, its requirements, use cases, business models and value creation. Discussions of some of the 5G challenges are included in the chapter; its coexistence with current technologies, its strict latency and high spectrum requirements, and the performance and variability of the QoS requirements of 5G applications. Finally, an outline of 5G research activities and initiatives across the globe is provided.