Pro-Multidis-CM


PROcesamiento MULTImedia DIStribuido
Programa S - 0505/TIC/0233, IV PRICIT, CM

Toward Cognitive Coexistence of Heterogeneous Wireless Users

Ponente: Prof. Lang TONG (SEE, Cornell University, Ithaca, NY, USA)

The explosive growth of wireless communications has presented us an intriguing spectrum paradox: On the one hand, the overcrowding spectrum allocation threatens the potential deployment of new wireless services. On the other hand, at a particular time and location, the spectrum is often only used sparsely, despite the presence of many potential unlicensed users. The root of this paradox, now widely recognized, is the static spectrum allocation and the rigid access policy that prevent a more efficient and dynamic usage of wireless channels.

We present in this talk some recent developments in opportunistic spectrum access using software-defined cognitive radios. We are interested in the coexistence of primary wireless users with cognitive secondary users capable of channel sensing and adaptive transmission. We focus on a decision-theoretic approach aimed at achieving an optimal tradeoff among opportunity learning, opportunity exploitation, and interference mitigation. We illustrate the proposed approaches in the context of the cognitive coexistence of Bluetooth/WLAN devices.

Fecha: 10 de Junio de 2009
Horario: 12:00
Lugar: EPS Universidad de Alcalá, Sala de Grados

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