Power Saving Mechanism in IEEE 802.16m

Most wireless networks adopt power saving mechanisms in order to extend the battery lifetime of mobile devices. In this paper, we investigate the performance of a power saving mechanism in IEEE 802.16m by using a simulator which models the sleep mode operation with a flexible length of listening window specified in IEEE 802.16m standard. Through simulations, we evaluate the proportion of listening window in a given sleep operation period as a performance measure for power consumption instead of direct estimation of power consumption and measure the power efficiency in various environments. The sleep mode operation in traffic indication messages can reduce the proportion of the listening window by approximately 10% than that without traffic indication messages.