On the delay-energy tradeoff in multiuser fading channels

Journal article
(Original article)


Publication Details

Author(s): Chaporkar P, Kansanen K, Müller R
Journal: EURASIP Journal on Wireless Communications and Networking
Publisher: Hindawi Publishing Corporation / SpringerOpen / Springer Verlag (Germany)
Publication year: 2009
Volume: 2009
ISSN: 1687-1472


Abstract


We consider the delay-energy tradeoff on a fading channel with multiuser diversity. For fixed arbitrary rates of the users, the total transmitted energy is minimized subject to a delay constraint. To achieve this goal we propose a scheme which schedules a subset of all users simultaneously. The scheduled users are allocated power to guarantee successful separation at the detector by successive decoding. In this way, we can benefit from both multiuser diversity and the near-far situation via scheduling and simultaneous transmission, respectively. We analytically show that when the number of users goes to infinity the energy required to guarantee the required user rates can be made as small as required at the cost of a higher delay delay-energy 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 multiaccess channel. Finally, all the results can be generalized in a straightforward fashion to broadcast channel due to the Gaussian multiaccess-broadcast channel duality.



FAU Authors / FAU Editors

Müller, Ralf Prof. Dr.-Ing.
Professur für Informationsübertragung


External institutions with authors

NTNU Trondheim - Norwegian University of Science and Technology


How to cite

APA:
Chaporkar, P., Kansanen, K., & Müller, R. (2009). On the delay-energy tradeoff in multiuser fading channels. EURASIP Journal on Wireless Communications and Networking, 2009. https://dx.doi.org/10.1155/2009/198903

MLA:
Chaporkar, Prasanna, Kimmo Kansanen, and Ralf Müller. "On the delay-energy tradeoff in multiuser fading channels." EURASIP Journal on Wireless Communications and Networking 2009 (2009).

BibTeX: 

Last updated on 2018-27-10 at 14:50