تصفح حسب المؤلف "Cheng, Xiuzhen"
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Analyzing cognitive network access efficiency under limited spectrum handoff agility
NoroozOliaee, MohammadJavad; Hamdaoui, Bechir; Cheng, Xiuzhen; Znati, Taieb; Guizani, Mohsen ( Institute of Electrical and Electronics Engineers Inc. , 2014 , Article)Most existing studies on cognitive-radio networks assume that cognitive users (CUs) can switch to any available channel, regardless of the frequency gap between a target channel and the current channel. However, due to ... -
EM-MAC: An energy-aware multi-channel MAC protocol for multi-hop wireless networks
Sivanantha, Akhil; Hamdaoui, Bechir; Guizani, Mohsen; Cheng, Xiuzhen; Znati, Taieb (2012 , Conference Paper)We propose an energy-aware MAC protocol, referred to as EM-MAC, for multi-hop wireless networks with multi-channel access capabilities. EM-MAC relies on iMAC's efficient channel selection mechanism to resolve the medium ... -
Improving macrocell downlink throughput in rayleigh fading channel environment through femtocell user cooperation
Zaid, Adem M.; Hamdaoui, Bechir; Cheng, Xiuzhen; Znati, Taieb; Guizani, Mohsen (2013 , Article)This paper studies cooperative techniques that rely on femtocell user diversity to improve the downlink communication quality of macrocell users. We analytically derive and evaluate the achievable performance of these ...