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GLOBECOM
2010
IEEE
10 years 10 months ago
Phase Transition Diagram for Underlay Heterogeneous Cognitive Radio Networks
Abstract--Characterizing the topology and therefore fundamental limits is a must to establish effective end-to-end cognitive radio networking (CRN). However, there lacks complete u...
Weng-Chon Ao, Shin-Ming Cheng, Kwang-Cheng Chen
WD
2010
10 years 11 months ago
Coexistence of radio networks using Aloha
: In this paper we use an analytical model to study how two radio networks : a primary network and a secondary network can coexist within the same area. We use a very simple protoc...
Bartlomiej Blaszczyszyn, Paul Mühlethaler, Sk...
ITIIS
2010
191views more  ITIIS 2010»
10 years 12 months ago
Cooperative Multi-relay Scheme for Secondary Spectrum Access
In this paper, we propose a cooperative multi-relay scheme for a secondary system to achieve spectrum access along with a primary system. In the primary network, a primary transmi...
Tran Trung Duy, Hyung Yun Kong
TWC
2008
188views more  TWC 2008»
11 years 1 months ago
Joint power control and beamforming for cognitive radio networks
We consider a secondary usage of spectrum scenario where a secondary network coexists and/or shares the radio spectrum with a primary network to which the spectrum is licensed. The...
Habibul Islam, Ying-Chang Liang, Anh Tuan Hoang
GLOBECOM
2008
IEEE
11 years 8 months ago
On Spectrum Sharing in Cooperative Multiple Access Networks
Abstract— The coexistence and resource sharing between a primary network utilizing cognitive relays and a secondary network are investigated. Two multiple access protocols are pr...
Amr El-Sherif, Ahmed K. Sadek, K. J. Ray Liu
MOBICOM
2009
ACM
11 years 8 months ago
Connectivity of cognitive radio networks: proximity vs. opportunity
We address the connectivity of large-scale ad hoc cognitive radio networks, where secondary users exploit channels temporarily and locally unused by primary users and the existenc...
Wei Ren, Qing Zhao, Ananthram Swami
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