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As IEEE 802.11 Wireless Local Area Network (WLAN) becomes the prevailing technology for the broad band wireless internet access, its power save mechanism which has been discovered to be naturally weak in supporting the mobility of Mobile Host (MH) when there is no traffic to be served for the MHs has become a key research issue. This paper examined some power save algorithm in literature in the light of their performance and complexity. It also pointed out major limitations with the existing schemes, which calls for more work in this area.
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