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Published Articles >> Table of Contents >> Abstract
32nd IEEE Conference on Local Computer Networks (LCN 2007)
pp. 731-738
Adaptive Resource Allocation and Scheduling for the Delay Limited OFDM Systems
Liexin Peng, Southwest Petroleum University, China
Jian Du, Southwest Petroleum University, China
Guangxi Zhu, Huazhong University of Science and Technology, China
Full Article Text:
 
DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/LCN.2007.26
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| Abstract |
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In the wireless networks, the power saving is
highly important. The way of power saving by resource allocation
and scheduling is attached more attention on recently. This paper
explores optimal and suboptimal scheduling strategy for a multicarrier
system over fading channels. The scheduling objective is
to minimize the average system power under the delay constraint.
Specifically, we study the trade-offs between the total transmit
power of an orthogonal frequency division multiplexing (OFDM)
system and the buffering delay of the packets in a transmission
buffer. We formulate this optimization problem as a MDP and
use dynamic programming techniques to obtain the optimal
solution. Since finding the optimal policies becomes complex and
practically un-realizable for large number of carriers in the
system, we offer a suboptimal power allocation and bit loading
algorithm using the results of the single carrier system and a
greedy approach. Simulations show that the sub-optimal
algorithm, which has reduced complexity, has performance close
to the optimal one.
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 Additional Information
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Index Terms- adaptive; MDP; power allocation;cross layer, OFDM
Citation:
Liexin Peng, Jian Du, Guangxi Zhu,
"Adaptive Resource Allocation and Scheduling for the Delay Limited OFDM Systems,"
lcn,
pp. 731-738,
32nd IEEE Conference on Local Computer Networks (LCN 2007),
2007
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