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IEEE 802.16 WiMAX is one of the popular technologies in the field of wireless networking recently, where channel resource allocation and reservation have become key issues. In the paper a QoS Coordinated Distributed Scheduling scheme (QC-DSCH) based on priorities is proposed to meet the QoS requirements in MAC layer. There are three algorithms in QC-DCSH. Adjusting hold-off time (AH) algorithm exploits...
WiMAX (Worldwide Interoperability for Microwave Access)/ IEEE 802.16 is a very promising 4G technology. WiMAX is now in the testing via implementation stage at various locations like Taiwan, India. The results have been, so far, very promising. With the growing popularity of WiMAX, the security risks have increased many folds. In this paper we will give an overview of the security architecture of...
CDMA is most widely used standard for multiuser system in wireless ad hoc network. CDMA standards presents set of protocols for power control, BER control and multiuser detection system in ad hoc network. Therefore behevior of MANET depends upon the modeling of CDMA based MAC layer, which also attributes to the performance of the network. In this paper we present a means of improving the performance...
Analyzing the fascinating evolution of wireless communication, the much anticipated 4G standard promises wonders. This paper explores the trends in the evolution of wireless communication. This paper outlines the requirements that are to be met by the 4G standard. It also attempts to analyze the technical challenges that demand solutions during the course of the development and implementation of the...
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