PERFORMANCE EVALUATION OF DYNAMIC PRIORITY CALL ADMISSION CONTROL ALGORITHM FOR WCDMA BASED 3G NETWORKS

ABSTRACT

The 3G cellular mobile wireless networks based on wideband code division multiple access (WCDMA) are projected to provide a comprehensive range of multimedia services to mobile customers with guaranteed quality of service (QoS). Effective radio resource management (RRM) is required to deliver the different level of service demanded by these networks’ users. Radio resource management is in charge of ensuring that network resources are used efficiently and optimally while delivering QoS assurances to various applications. Call admission control is a type of radio resource allocation system used for QoS provisioning in a network that limits network access based on resource availability in order to avoid network congestion and service degradation. This study looks at ways to ensure service continuity while also providing service differentiation based on a mobile user’s traffic profile by effectively utilizing system resources. Handoff real-time, handoff non-real-time, new call real-time, and new call non-real-time are the four traffic classes, with handoff traffic classes receiving higher priority. It employs the dynamic prioritized uplink call admission control (DP-CAC) algorithm, which is an effective technique for improving the performance of WCDMA-based 3G networks. This research effort includes the queuing delay and the call blocking/dropping likelihood of each traffic class in addition to system utilization, revenue, and grade of service as major performance factors. The new call is detected as a result of the simulation results and investigation. It was also discovered that at 3.60E+03 peak traffic intensity, handoff RT has a probability of 1.59E-02, handoff NRT has a probability of 1.69E-02, new call RT has a probability of 2.00E-02, and new call NRT has a probability of 2.10E-02, indicating that call blocking/dropping probability of handoff and new calls is minimized. This is accomplished because the model dynamically shifts handoff traffic to its dedicated channel while allowing incoming calls to run through the general server, ensuring service continuity for handoff traffic while also ensuring fairness for new call traffic classes.

CHAPTER ONE

INTRODUCTION

Background of Study

Cellular phone networks have been enjoying tremendous expansion in the telecoms industry for several years. When the first cellular technologies were put into operation in the early 1980s, the number of subscribers grew slowly at initially, hardly predicting the later explosive rise [1, 2]. The slow growth of subscribers was due to system incompatibility and significant disparities in the use of the radio sector [2, 3]. Unfortunately, travelers who travel to countries where their operator’s technology is not available find themselves abruptly without a communication tool since subscriber management is not consistent across systems [1, 2, 4, 5]. As a result, a uniform standard was required to address these challenges, leading to the development of the first generation analogue system and then the fourth generation system, also known as the long term evolution system (LTE). The frequency of operation, modulation scheme, protocol of operation, access mode technology, and physical architecture of different cellular network evolutions varies, however the signaling standard is a common aspect.

PERFORMANCE EVALUATION OF DYNAMIC PRIORITY CALL ADMISSION CONTROL ALGORITHM FOR WCDMA BASED 3G NETWORKS

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