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CORR
2008
Springer

Channel and Multiuser Diversities in Wireless Systems: Delay-Energy Tradeoff

8 years 2 months ago
Channel and Multiuser Diversities in Wireless Systems: Delay-Energy Tradeoff
We consider a communication system with multi-access fading channel. Each user in the system requires certain rate guarantee. Our main contribution is to devise a scheduling scheme called "Opportunistic Superposition Coding"that satisfies the users' rate requirements. Using mean-field analysis, i.e., when the number of users go to infinity, we analytically show that the energy required to guarantee the required user rate can be made as small as required at the cost of a higher delay ("delayenergy tradeoff"). We explicitly compute the delay under the proposed scheduling policy and discuss how delay differentiation can be achieved. We extend the results to multiband multi-access channel. Finally, all the results can be generalized in a straightforward fashion to broadcast channel because of the uplink-downlink duality.
Prasanna Chaporkar, Kimmo Kansanen, Ralf R. Mü
Added 09 Dec 2010
Updated 09 Dec 2010
Type Journal
Year 2008
Where CORR
Authors Prasanna Chaporkar, Kimmo Kansanen, Ralf R. Müller
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