Cross‐layer resource optimisation in time‐varying orthogonal frequency division multiple access networks with guaranteed delay. Issue 8 (25th May 2017)

• Record Type: Journal Article
• Authors: Guo, Yashuang; Yang, Qinghai; Park, Daeyoung; Kwak, Kyung Sup
• Is Part Of: IET communications. Volume 11:Issue 8(2017)
• Page Start: 1256
• Page End: 1263
• Publication Date: 2017-05-25
• Subjects: frequency division multiple access -- OFDM modulation -- stochastic programming -- wireless channels -- time‐varying channels -- power consumption -- telecommunication power management; cross‐layer resource optimisation -- delay‐guaranteed resource optimisation -- time‐varying channels -- data arrivals -- stochastic optimisation model -- delay‐guaranteed power‐optimal algorithm -- DPOA -- channel statistics -- time‐varying OFDMA networks -- orthogonal frequency division multiple access -- long‐time‐average transmit power consumption; Telecommunication systems -- Periodicals; Speech processing systems -- Periodicals; 621.38205
• DOI: 10.1049/iet-com.2016.0817
• Languages: English
• ISSNs: 1751-8628

Abstract

Abstract : In this study, the authors investigate the delay‐guaranteed resource optimisation in orthogonal frequency division multiple access networks under time‐varying channels and bursty data arrivals. Stochastic optimisation model is employed to minimise the long‐time‐average transmit power consumption (PC) of base station under the constraints of network stability and individual user's delay requirement. They develop a delay‐guaranteed power‐optimal algorithm (DPOA) to obtain the optimal decisions of stochastic optimisation problem. Without prior knowledge of channel statistics and data arrivals, DPOA yields a time‐averaged transmit PC that can arbitrarily approach the theoretical optimum attained by the network with complete knowledge of statistics. Simulations results verify the theoretical analysis on the network performance and show the effectiveness of DPOA.