ABSTRACT
In UMTS mobile networks for multimedia traffic, maintaining a high level of service is a difficult task (video, voice and data). Critical services like real-time audio, speech, and video are prioritized over less critical services like file transfer and web browsing. Dynamically allocating bandwidth to fluctuating traffic loads and channel conditions is one of the ways that efficiently offers standard quality of service for multimedia traffic in wireless networks. Researchers have developed a number of dynamic bandwidth allocation algorithms in recent years. In mobile communication networks, deciding which one to use at any given time and under what circumstances is a challenge. The popular Code-Division Generalized Processor Sharing (CDGPS) was investigated in this study. The priority and non-priority CDGPS versions were compared, and the two approaches were modelled and simulated in the MATLAB Simulink object-oriented environment. According to simulation results, priority CDGPS delivers the best performance and reduction in delay and loss rate while still maintaining a high bandwidth utilization of 98.2 percent.
CHAPTER ONE
INTRODUCTION
BACKGROUND OF THE STUDY
In today’s voice/data network environment, mobile communications play a critical role. The standard has evolved from the early analog mobile first generation (1G) to the third generation (3G). The new mobile generations don’t claim to improve voice communication, but rather to provide users with access to a new global communication reality [1]. The goal is to achieve global communication and give users with a new range of services. The first generation (1G) wireless mobile communication network was an analog technology that was utilized for public phone service with a speed of up to 2.4kbps. Digital technology and network infrastructure underpin the second generation (2G). The second generation, in comparison to the first, may enable text messaging [2]. Its popularity, as well as the growing demand for online information via the internet, drove the development of cellular wireless systems with improved data connectivity, resulting in third-generation systems (3G). Now is the time to investigate new needs and discover new ways to expand the mobile concept. The 2.5G, General Packet Radio Service (GPRS), and Enhanced Data Rates for GSM Evolution (EDGE) networks were the first to provide customers with access to a data network (e.g. Internet access, Multimedia Message Service).
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