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Issue No. 03 - March (2010 vol. 9)
ISSN: 1536-1233
pp: 348-360
Anh Tuan Hoang , Institute for Infocomm Research, Singapore
Ying-Chang Liang , Institute for Infocomm Research, Singapore
Md Habibul Islam , Institute for Infocomm Research, Singapore
We consider a point-to-multipoint cognitive radio network that shares a set of channels with a primary network. Within the cognitive radio network, a base station controls and supports a set of fixed-location wireless subscribers. The objective is to maximize the throughput of the cognitive network while not affecting the performance of primary users. Both downlink and uplink transmission scenarios in the cognitive network are considered. For both scenarios, we propose two-phase mixed distributed/centralized control algorithms that require minimal cooperation between cognitive and primary devices. In the first phase, a distributed power updating process is employed at the cognitive and primary nodes to maximize the coverage of the cognitive network while always maintaining the constrained signal to interference plus noise ratio of primary transmissions. In the second phase, centralized channel assignment is carried out within the cognitive network to maximize its throughput. Numerical results are obtained for the behaviors and performance of our proposed algorithms.
Wireless communications, dynamic spectrum access, distributed control, joint power control and channel allocation.

M. H. Islam, A. T. Hoang and Y. Liang, "Power Control and Channel Allocation in Cognitive Radio Networks with Primary Users' Cooperation," in IEEE Transactions on Mobile Computing, vol. 9, no. , pp. 348-360, 2009.
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