Investigation on Quality of Service QoS Enhancement Techniques in Wireless Networks

Abstract

Improved Quality of Service (QoS) across the wireless networks is a key parameter for the current and future wireless communication systems and techniques. As a consequence, one of the main expectations of the future wireless systems is to significantly enhance the throughput and fairness. In recent years, it has been realized that the packet schedulers in the wireless networks play a predominant role in the improvement of QoS. It appeared to be a strong area that could enhance substantially the throughput and fairness of the network by the efficient resource allocation methods. The primary aim of this research study is to enhance the QoS performance of Long Term Evolution (LTE) Downlink (DL) system. An exhaustive literature survey on existing LTE DL system architecture as per 3rd Generation Partnership Project (3GPP) standard latest releases, its QoS improvement parameters, the improvement techniques in terms of DL packet schedulers and their related works have been carried out. newlineQoS parameters are important to evaluate the performance of the packet schedulers with new design concepts in the wireless networks. In order to design an efficient DL packet scheduler and to understand its performance limits, it is very essential to grasp the importance of QoS parameters in the wireless network operation. Large number of DL packet schedulers are available for LTE DL under different classifications to efficiently allocate the available time-frequency radio resources to the User Equipment (UE), i.e., the mobile stations according to their QoS requirements. Most of them are working with channel / QoS aware strategies, but still the users QoS demands are not fully satisfied. They are working under the Radio Resource Management (RRM) scheme installed in the Evolved Node-B (eNB), i.e., the base station in the DL architecture of LTE. It has the flexibility to design by the service providers point of view since the 3GPP standard does not give any strict rules and policies to develop the schedulers.