In this paper, we focus on the design of efficient resource allocation algorithms for a multihop cellular network, with orthogonal frequency division multiple access (OFDMA) as downlink transmission technique and utilizing decode-and- forward cooperation strategy. Our objective is to maximize the total capacity based on the constraint of individual transmission power at each transmitter. We also consider users' QoS requirements by maximizing the total capacity while giving users proportional fairness weights according to their data requirements. We show that for each data symbol (at each subcarrier) transmitted by base station, the best relaying strategy is to let only one among all the relay stations perform the relaying task. This is true for both objectives of maximizing total capacity and maximizing capacity with proportional fairness constraint. We then propose efficient greedy algorithms for both centralized and distributed resource allocations based on our analysis. Simulation results indicate that our proposed algorithms effectively enhance the total capacity.
|Translated title of the contribution||Resource allocation techniques for OFDMA-based decode-and-forward relaying networks|
|Title of host publication||IEEE Vehicular Technology Conference, 2008 (VTC Spring 2008), Singapore|
|Publisher||Institute of Electrical and Electronics Engineers (IEEE)|
|Pages||1717 - 1721|
|Number of pages||5|
|Publication status||Published - May 2008|
|Event||Vehicular Technology Conference 2008 - Singapore, Singapore|
Duration: 1 May 2008 → …
|Conference||Vehicular Technology Conference 2008|
|Abbreviated title||VTC 2008-Spring|
|Period||1/05/08 → …|
Bibliographical noteRose publication type: Conference contribution
Additional information: With accompanying conference presentation
Sponsorship: The work reported in this paper has formed part of the Delivery Efficiency
Core Research Programme of the Virtual Centre of Excellence in Mobile and
Personal Communications, Mobile VCE, www.mobilevce.com. This research
has been funded by EPSRC and by the Industrial Companies who are
Members of Mobile VCE.
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Other identifier: 9781424416455