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PIMRC
2010
IEEE

Downlink capacity of two-tier cognitive femto networks

9 years 3 months ago
Downlink capacity of two-tier cognitive femto networks
Abstract--In two-tier networks consisting of a macrocell overlaid with femtocells in co-channel deployment and closed-access policy, spatial reuse is achieved at the price of severe crosstier interference from concurrent transmissions. The lack of direct coordination between the macro and femtocells makes interference control as a challenging issue. Cognitive radio (CR) becomes a promising solution, where femtocells with cognitive information accomplish concurrent transmissions while meeting a per-tier outage constraint. Several interference-aware allocation approaches are proposed to enhance spatial reuse according to cognitive capabilities of femtocell. By employing stochastic geometry model, bounds on the distribution of aggregated interference from two-tier spatial point processes are successfully analyzed. The maximum number of simultaneously transmitting femtocells and overall downlink capacity of two-tier networks meeting a per-tier outage requirement in each approach are theore...
Shin-Ming Cheng, Weng-Chon Ao, Kwang-Cheng Chen
Added 14 Feb 2011
Updated 14 Feb 2011
Type Journal
Year 2010
Where PIMRC
Authors Shin-Ming Cheng, Weng-Chon Ao, Kwang-Cheng Chen
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