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
Two-level downlink scheduling for real-time multimedia services in LTE networks / Piro, Giuseppe; Grieco, Luigi Alfredo; Boggia, Gennaro; Fortuna, Rossella; Camarda, Pietro. - In: IEEE TRANSACTIONS ON MULTIMEDIA. - ISSN 1520-9210. - 13:5(2011), pp. 1052-1065. [10.1109/TMM.2011.2152381]
Two-level downlink scheduling for real-time multimedia services in LTE networks
PIRO, Giuseppe;GRIECO, Luigi Alfredo;BOGGIA, Gennaro;Fortuna, Rossella;CAMARDA, Pietro
2011-01-01
Abstract
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 flowsI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.