Application Level Energy and Performance Measurements in a Wireless LAN
GREENCOM '11 Proceedings of the 2011 IEEE/ACM International Conference on Green Computing and Communications
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U-APSD is the power save procedure defined in IEEE802.11e to improve the QoS performance of multimedia applications. U-APSD is specially suited for bi-directional traffic streams. But in some scenario without synchronized uplink and downlink traffic, defects in U-APSD procedure will result in some problems. In order to address this issue, this paper develops a low power implementation scheme of U-APSD by exploiting the downlink traffic rate estimation algorithm, and using clock gating technique as circuit-level approach to save dynamic power. Our experiments show that the scheme brings significant reduction in power consumption of NIC with little impact to the performance.