Worldwide interoperability for micro wave access (WiMAX) is a wireless network that have attracted the attention of researchers on the area of power savings, because of the increase in multimedia applications that consumes more battery power of Mobile stations (MS). MS experience an increase in their daily operations with limited power enforced on the MS; hence the need to optimally increase efficiency; due to the excessive power consumption experienced by MS; which significantly affects the performance of MS since, MS are battery powered with a super impose life, improving the life time of MS is imperative. Thus, this has led to numerous research works on energy-savings. Hence, we have presented a survey on the recent and past energy-saving schemes, aimed at understanding some of the most relevant sources of inefficiency in energy savings and how some of these challenges are solved by the existing solutions. We further presented a comparative analysis on these schemes with the aim of identifying current challenges that are yet to be addressed by the research community as well as presents future directions towards efficient energy savings in WiMAX networks. Keywords: Power-Savings, Consumption, WiMAX, Networks

Wireless telecommunication networks have become fundamental to our daily activities. Today, people have access to at least one type of wireless telecommunication network with Mobile Stations (MS) supporting multiple applications that consume more battery power; as well as a constant increase in multimedia applications that possess a critical challenge in efficient battery management. MSs are battery powered devices with limited lifetime. An efficient management of the battery will extend its lifetime before recharging exercise is conducted. World Wide Interoperability for Microwave Access (WiMAX), is design to Supports Higher Bandwidth with different traffic classes support for Power Management. Due to the mobility Characteristics introduced in WiMAX, power savings became an important problem; Since MS has limited superimpose life that requires recharging exercise when the battery life is depleted. Thus, Battery Lifetime Aware Power Saving Scheme (BLAPS) and an Adaptive Power Saving Scheme were proposed to extend the Battery Life, but the first scheme resulted in frequent transition to listening mode which led to waste of energy. While the former has higher energy consumption resulting to poor QoS that degrades the overall performance of MS. Hence, a Quality of Service (QoS) Aware Power Saving Scheme is proposed to improve the QoS. The scheme introduced a Modified minimum (Tmin) and Maximum (Tmax) sleep intervals in order to enhance the parameters of the variant schemes. In addition, the scheme also introduced a modified sleep window as well as QoS Aware algorithm that enable the adjustments of the sleep Parameters more appropriately in order to minimize frequent Transition to listening mode while improving efficiency. Finally, a state transition diagram was also developed. The proposed scheme was evaluated using MATLAB simulator; the results proved that the proposed QoS Aware Scheme has superior performance in terms of consumption rate and response delay respectively. Keywords: Battery Life, Power Consumption, Response Delay.