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Joint optimization of relay strategies and resource allocations in cooperative cellular networks (2006)
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| Venue: | in Proceedings of the Conference on Information Sciences and Systems (CISS |
| Citations: | 103 - 2 self |
BibTeX
@INPROCEEDINGS{Ng06jointoptimization,
author = {Truman Chiu-yam Ng and Wei Yu},
title = {Joint optimization of relay strategies and resource allocations in cooperative cellular networks},
booktitle = {in Proceedings of the Conference on Information Sciences and Systems (CISS},
year = {2006},
pages = {328--339}
}
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Abstract
Abstract — This paper considers a wireless cooperative cellular data network with a base station and many subscribers in which the subscribers have the ability to relay information for each other to improve the overall network performance. For a wireless network operating in a frequency-selective fading environment, the choices of relay node, relay strategy, and the allocation of power and bandwidth for each user are important design parameters. The design challenge is compounded further by the need to take user traffic demands into consideration. This paper proposes a utility maximization framework for such a network. We show that for a cellular system employing orthogonal frequency-division multiple-access (OFDMA), the optimization of physical-layer transmission strategies can be done efficiently by introducing a set of pricing variables. The proposed solution incorporates both user traffic demand and the physical channel realization in a cross-layer design that not only allocates power and bandwidth optimally for each user, but also selects the best relay node and best relay strategy (i.e. decode-and-forward vs. amplify-and-forward) for each source-destination pair. I.
Keyphrases
relay strategy cooperative cellular network resource allocation joint optimization relay node decode-and-forward v pricing variable cross-layer design user traffic demand utility maximization framework frequency-selective fading environment source-destination pair physical-layer transmission strategy physical channel realization base station cellular system design challenge wireless network wireless cooperative cellular data network important design parameter overall network performance user traffic many subscriber orthogonal frequency-division multiple-access
