© 2014, IJARCSMS All Rights Reserved 163 | P age ISSN: 2321-7782 (Online) Volume 2, Issue 5, May 2014 International Journal of Advance Research in Computer Science and Management Studies Research Paper Available online at: www.ijarcsms.com Review of Qos Parameters for Wimax Environment Rachna Sharma 1 CSE/IT Baddi University of Emerging Sciences & Technology Baddi, India Abhishek Gupta 2 CSE/IT Baddi University of Emerging Sciences & Technology Baddi, India Abstract: Broadband wireless access (BWA) has emerged as a promising solution for last mile access technology to provide high speed internet access. At this moment, cable and digital subscriber line (DSL) technologies are providing broadband services. But the practical difficulties in deployment have prevented them from reaching many potential broadband internet customers. Many areas throughout the world currently are not under broadband access facilities. Especially a developing country like India even many urban and suburban locations may not be served by DSL connectivity. WiMax is one of the next generation wireless networking standard provides a cost effective solution for wireless network ensuring QoS. All difficulties those have been faced while using wired DSL network can be overcome by WiMax, which is faster to deploy , easier to scale and more flexible because of its wireless nature. Use of OFDM modulation makes it a true BWA technology. There are several environmental factors affect the performance, stability and accuracy. These factors can be listed as Degree of Connectivity among Nodes, Degree of Mobility, Number and Duration of Data Flows. Understanding the performance of routing protocols in dynamic networks is a key feature to determine which routing protocol is best suited for which type of network scenario. This paper presents a thorough overview of some of the QoS parameters and routing protocols along with their strengths and weaknesses. A comparative study of the QoS parameters and routing protocols is done and in addition, the current issues and future challenges that are involved in this exciting area of research are also included. Keywords- WiMAX, OFDM, rtPS, nrtPS, UGS, BE I. INTRODUCTION Broadband wireless systems could be: Fixed Broadband Wireless or Mobile Broadband Wireless. Applications using a fixed wireless solution can be classified as point-to-point or point-to-multipoint. Point-to-point applications include inter- building connectivity within a campus and microwave backhaul. Point-to-multipoint applications include broadband for residential, small office/home office (SOHO), and small- to medium-enterprise (SME) markets, T1 or fractional T1-like services to businesses, and wireless backhaul for Wi-Fi hotspots. Although initial WiMax deployments are likely to be for fixed applications, the full potential of WiMax will be realized only when used for innovative nomadic and mobile broadband applications. WiMax technology in its IEEE 802.16e-2005 incarnation will likely be deployed by fixed operators to capture part of the wireless mobility value chain in addition to plain broadband access. As end users get accustomed to high-speed broadband at home and work, they will demand similar services in a nomadic or mobile context, and many service providers could use WiMax to meet this demand. Various technical challenges associated with meeting the service requirements for broadband wireless, along with potential solutions as summarized in Table I and Table II: