1Evolution of Cellular Systems
Shahriar Shahabuddin1, Sadiqur Rahaman1, Faisal Rehman1, Ijaz Ahmad1, and Zaheer Khan2
1 University of Oulu, Finland
2 University of Liverpool, UK
1.1 Introduction
Wireless communication technologies are essential parts of our lives. From WiFi home networks to sophisticated machine‐to‐machine communication in the robotics industry, we live in a world of wireless connectivity and it is impossible to imagine a single day without using any wireless devices. The blessings of cellular technologies provided us with a great deal of mobility and thus made it possible to listen to the radio while travelling in a car or on the beach. The cellular devices are also convenient in that we no longer have to worry about the size of the cables to connect to the networks. We are now living in a world where conferences for business meetings, distance and online courses from universities, and medical help over long distances are considered as part and parcel of our daily lives. We have greater access to information than ever before and it is all possible due to the advancements and inventions in cellular communication.
The number of cellular users increased dramatically over the last decade compared to the other technologies and are still increasing. We can see from Figure 1.1 that the fixed broadband or fixed wired subscription did not increase that much in a last decade, while the mobile cellular subscriptions are increasing day by day. With the advent of sophisticated ...
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