25G Mobile Networks: Requirements, Enabling Technologies, and Research Activities
Van‐Giang Nguyen, Anna Brunstrom, Karl‐Johan Grinnemo, and Javid Taheri
Department of Computer Science, Karlstad University, Karlstad, Sweden
2.1 Introduction
In the previous chapter, we have seen the history and evolution of the four generations of mobile cellular systems. After more than three decades of evolution, mobile cellular systems have significantly changed from analog or circuit‐based to packet‐based communication systems, with also big changes in the speed and bandwidth improvement as well as the number of connected devices. According to a forecast by Ericsson [1], the number of connected devices is growing rapidly and will reach to close to 28 billion by 2021, with around 16 billion Internet of Things (IoT) related devices.
This big change in the demand from users and the emergence of new services, and the increase of the communication needs from vertical industrial sectors such as automotive, agriculture, health, and transport, impose a huge challenge on the current generation of mobile cellular system (i.e. 4G). As a consequence, it requires the development of the next generation mobile system or fifth generation (5G), which is expected to be an ecosystem for every Internet‐enabled device. In the following, we will explore more about the vision of the 5G system and its typical use cases to see how it differs from today’s 4G mobile networks.
2.1.1 What is 5G?
Since 5G is still in ...
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