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Relay transmission or cooperative communication is an advanced technique that can improve the performance of data transmission among wireless nodes. However, while the performance (e.g., throughput) of a source node can be improved through cooperation with a number of relays, this improvement comes at the expense of a degraded performance for the relay nodes due to the resources that they dedicate...
In this paper, we develop an opportunistic spectrum-scheduling scheme for multichannel cognitive radio networks. In the proposed scheme, the primary user activity and channel quality (signal-to-noise ratio (SNR) at the receiving secondary user) vary on a slot-by-slot basis. The scheduling is performed at the beginning of the frame, which consists of multiple slots. The scheduling algorithm estimates...
In this paper, we develop an opportunistic spectrum scheduling scheme for cognitive radio networks. In the proposed scheme, the channel status (i.e., whether being occupied by primary users) and the instantaneous channel quality (SNR at the secondary receiver) are assumed to vary fast within a frame which consists of a fixed number of slots. At each scheduling epoch, each secondary user will observe...
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