For coordination functions of DCF, EDCA, PCF and HCF, the thesis proposes corresponding methods to reduce overhear, which is the greatest source of enegy loss for 802.11PSM.

• 偷听是802.；11PSM的能量浪费的主要原因，本文针对DCF、EDCA、PCF和HCF等不同协调方式提出了减少偷听的策略。