A Delay Aware Power Saving Scheme (DAPSS) Base on Load in Traffic IEEE 802.16e Networks

IEEE 802.16 Standard also known as worldwide interoperability for Microwave Access (WiMAX) is designed to support wider coverage, higher bandwidth, less cost of deployment with different traffic classes' support for power savings. The IEEE added mobility characteristics which made batterylife of Mobile Station (MS) a critical challenge, since MS are battery powered with an impose rechargeable life. An Efficient Battery Lifetime Aware Power Saving Scheme was proposed. The Scheme minimizes frequent transition of MS in order-to reduce power consumption but increases average response delay due to a longer sleep interval used. Thus, a Delay Aware Power Saving Scheme (DAPSS) Based on Traffic Load is proposed to reduce the excessive response delay. The Scheme introduces a modified minimum and maximum sleep interval in order to reduce the longer sleep time of a MS, and dynamically tunes the sleep parameters more appropriately according to the traffic load. It employed a delay aware algorithm to save power. The Scheme was evaluated using discrete event simulator, the results showed that the proposed DAPSS achieves superior performance compared to the existing Scheme in terms of the average power consumption and response delay.