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Sleep-mode power-saving mechanisms introduced by IEEE 802.16e/m aim to save power. Existing studies on the sleep-mode performance only assume the intra-Base Station (BS) movement for a mobile station. How the sleep-mode operation affects the handover and, sequentially, the power-saving efficiency when the inter-BS movement is frequent has not been carefully investigated. In this paper, we develop...
Location dependency and its associated exposed receiver problem create the most severe unfairness scenario in CSMA/CA protocol. To address this issue, we develop an analytical model to study 1) the likelihood of the exposed receiver problem and how this likelihood varies with the carrier sensing and the transmission ranges; 2) the probabilities of successful RTS receptions and of successful RTS/CTS...
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