Two-Level Downlink Scheduling for Real-Time Multimedia Services in LTE Networks

被引:170
作者
Piro, Giuseppe [1 ]
Grieco, Luigi Alfredo [1 ]
Boggia, Gennaro [1 ]
Fortuna, Rossella [1 ]
Camarda, Pietro [1 ]
机构
[1] Politecn Bari, DEE Dip Elettrotecn & Elettron, I-70125 Bari, Italy
关键词
Cellular networks; downlink scheduling; long-term evolution (LTE); quality-of-experience (QoE); quality-of-service (QoS);
D O I
10.1109/TMM.2011.2152381
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
Long-term evolution represents an emerging technology that promises a broadband and ubiquitous Internet access. But several aspects have to be considered for providing effective multimedia services to mobile users. In particular, in this work, we consider the design of a quality-of-service (QoS) aware packet scheduler for real-time downlink communications. To this aim, a novel two-level scheduling algorithm is conceived. The upper level exploits an innovative approach based on discrete-time linear control theory. Instead, at the lower level, a proportional fair scheduler has been properly tailored to our purposes. The performance and the complexity of the proposed scheme have been evaluated both theoretically and by using simulations. A comparison with recently proposed scheduling strategies has been also presented, considering several network conditions and real-time multimedia flows. Particular attention has been devoted to the evaluation of the quality-of-experience (QoE) provided to end users. Results have clearly shown that the proposed approach is able to greatly outperform the existing ones especially in the presence of real-time video flows.
引用
收藏
页码:1052 / 1065
页数:14
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