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The efficiency of power saving mechanism on wireless communications will influence the time the mobile stations (MSs) can operate. Due to the characteristics of centralized control in WiMAX system, the sleeping period of each subscriber is dominated by a base station (BS) based on their service types, traffic loads, and expected sleeping periods. The power saving mechanism uses an exponential backoff...
There are several uplink scheduling algorithms in IEEE 802.16 systems, such as unsolicited grant service (UGS) and real-time polling service (rtPS), which can be used for voice over IP (VoIP) services. But these algorithms have a problem of energy wasting. To solve this problem, we propose an energy saving based uplink scheduling algorithm for VoIP services. Then we analyze the performance of the...
A mobile station in IEEE 802.16e operates power management using sleep-mode operation with one or more connections supporting several applications. After all of the connections of an MS transit into the sleep state, the MS powers down and then goes into an unavailable state without communicating with the serving base station. To improve energy conservation, this letter proposes a new scheduled power-saving...
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