Journal of Computer and Communications
The third generation (3G) system was officially completed in 1997 by the International Telecommunications Union Radio communication Sector (ITU-R). This technology was a leader for more than a decade in the cellular network architecture. When 4G was introduced as an upgrade of the existing architecture, it was driven by the increasing demand for mobile broadband services with higher data rates and Quality of Service (QoS) . The 4G infrastructure market in 2014 is predicted to reach $11.4 billion. According to AT & T the number of 4G subscribers will reach 440 million
Caushaj, Eralda; Ivanov, Ivan; Fu, Huirong; Sethi, Ishwar; and Zhu, Ye, "Evaluating Throughput and Delay in 3G and 4G Mobile Architectures" (2014). Electrical Engineering & Computer Science Faculty Publications. 300.