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Introducing Hierarchy in Energy Games

Abstract : In this work we introduce hierarchy in wireless networks that can be modeled by a decentralized multiple access channel and for which energy-efficiency is the main performance index. In these networks users are free to choose their power control strategy to selfishly maximize their energy-efficiency. Specifically, we introduce hierarchy in two different ways: 1. Assuming single-user decoding at the receiver, we investigate a Stackelberg formulation of the game where one user is the leader whereas the other users are assumed to be able to react to the leader's decisions; 2. Assuming neither leader nor followers among the users, we introduce hierarchy by assuming successive interference cancellation at the receiver. It is shown that introducing a certain degree of hierarchy in non-cooperative power control games not only improves the individual energy efficiency of all the users but can also be a way of insuring the existence of a non-saturated equilibrium and reaching a desired trade-off between the global network performance at the equilibrium and the requested amount of signaling. In this respect, the way of measuring the global performance of an energy-efficient network is shown to be a critical issue.
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Submitted on : Tuesday, January 12, 2010 - 2:23:08 PM
Last modification on : Saturday, March 26, 2022 - 3:05:09 AM
Long-term archiving on: : Thursday, June 17, 2010 - 10:41:29 PM

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Samson Lasaulce, Yezekael Hayel, Rachid El-Azouzi, Merouane Debbah. Introducing Hierarchy in Energy Games. IEEE Transactions on Wireless Communications, Institute of Electrical and Electronics Engineers, 2009, 8 (7), pp.3833-3843. ⟨hal-00446281⟩

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