Home // ICSNC 2011, The Sixth International Conference on Systems and Networks Communications // View article
Authors:
Tengfei Xing
Xiaoming Tao
Jianhua Lu
Keywords: delay tolerant scheduling, resource allocation, LTE, spectrum efficiency
Abstract:
In this paper, we propose a multiuser scheduling scheme for traffic with diverse delay constraints in the downlink of 3GPP UMTS/LTE. Traditional scheduling algorithms applied in Long Term Evolution (LTE) do not take much consideration of various delay tolerances of data packets, and most of them are on a slot-to-slot basis, which limits the ability to share spectrum and power resources among time. This would cause the network failing to deliver some packets or declining certain requests with longer delay tolerances, thereby lowering the efficiency of limited spectrum resources. Our proposed scheme schedules packets from multiple users by gathering information including service QoS, channel conditions and available resources in a preset time window, whose length equals the typical delay tolerance of multimedia data packets. The gathering of those information could be aided by channel/traffic estimations and predictions. By doing so, the algorithm achieves notably higher effective throughput than conventional schemes, thereby boosting spectrum efficiency. Simulation results show that our scheduling and resource allocation strategy can achieve 200% to 400% times of spectrum efficiency under typical system parameters.
Pages: 15 to 19
Copyright: Copyright (c) IARIA, 2011
Publication date: October 23, 2011
Published in: conference
ISSN: 2163-9027
ISBN: 978-1-61208-166-3
Location: Barcelona, Spain
Dates: from October 23, 2011 to October 29, 2011