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QoS-aware water-filling for real-time transmission in OFDMA systems

Vakilinia, S ; Sharif University of Technology | 2011

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  1. Type of Document: Article
  2. DOI: 10.1109/CTS.2011.5898990
  3. Publisher: 2011
  4. Abstract:
  5. In this paper, we propose a distributed rate and power allocation algorithm for real time traffic by using second order statistics of the channel. Our method minimizes the average delay of transmission over the fading channel. We assume that each sub carrier relies on its own buffer, and a constant arrival rate from higher layer application arrives at input buffers of each sub-carrier. This constant rate is optimally distributed through individual sub-rates transmitted over each sub-channel. Optimum power coefficients are also derived to minimize the average delay of transmission. In addition, collision and buffer overflows are taken into account while achieving acceptable throughputs
  6. Keywords:
  7. cross layer optimization ; QoS ; Arrival rates ; Average delay ; Buffer overflows ; Constant rate ; Cross layer optimization ; Input buffers ; OFDMA ; OFDMA systems ; Power coefficients ; Rate and power allocation ; Real time traffics ; Real-time transmissions ; Second order statistics ; Sub-carriers ; Waterfilling ; Fading channels ; Information technology ; Real time systems ; Frequency division multiple access
  8. Source: 2011 18th International Conference on Telecommunications, ICT 2011, 8 May 2011 through 11 May 2011, Ayia Napa ; 2011 , Pages 84-89 ; 9781457700248 (ISBN)
  9. URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5898990