Long-Term Energy Constraints and Power Control in Cognitive Radio Networks

Details Long-Term Energy Constraints and Power Control in Cognitive Radio Networks Long-Term Energy Constraints and Power Control in Cognitive Radio Networks

2011-07-21

arxiv.org/abs/1107.4251v1

Computer Science

Networking and Internet Architecture

DSP 2011: 17th International Conference on Digital Signal Processing, July 2011, Corfu, Greece

Scientific paper

When a long-term energy constraint is imposed to a transmitter, the average energy-efficiency of a transmitter is, in general, not maximized by always transmitting. In a cognitive radio context, this means that a secondary link can re-exploit the non-used time-slots. In the case where the secondary link is imposed to generate no interference on the primary link, a relevant issue is therefore to know the fraction of time-slots available to the secondary transmitter, depending on the system parameters. On the other hand, if the secondary transmitter is modeled as a selfish and free player choosing its power control policy to maximize its average energy-efficiency, resulting primary and secondary signals are not necessarily orthogonal and studying the corresponding Stackelberg game is relevant to know the outcome of this interactive situation in terms of power control policies.

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