標題: A Novel Channel-Aware Frequency-Domain Scheduling in LTE Uplink
作者: Chao, Hsi-Lu
Chang, Chia-Kai
Liu, Chia-Lung
資訊工程學系
Department of Computer Science
關鍵字: LTE;uplink;SC-FDMA;resource allocation;contiguous constraint;robust rate constraint;channel-aware scheduling
公開日期: 2013
摘要: Due to the power consumption issue of user equipment (UE), Single-Carrier FDMA (SC-FDMA) has been selected as the uplink multiple access scheme of 3GPP Long Term Evolution (LTE). Similar to OFDMA downlink, SC-FDMA enables multiple UEs to be served simultaneously in uplink as well. However, the single carrier characteristic requires that all the allocated subcarriers to a UE must be contiguous in frequency with each time slot. Moreover, a UE should adopt the same modulation and coding scheme at all allocated subcarriers. These two constraints do limit the scheduling flexibility. In this paper, we formulate the UL scheduling problem with taking two constraints into consideration. Since this optimization had been proven to be an NP-hard problem, we further develop a heuristic algorithm with low complexity. We demonstrate that competitive performance can be achieved in terms of system throughput, which is evaluated by using 3GPP LTE system model simulations.
URI: http://hdl.handle.net/11536/23111
ISBN: 978-1-4673-5939-9
期刊: 2013 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE (WCNC)
起始頁: 917
結束頁: 922
Appears in Collections:Conferences Paper