Research on energy efficiency based on differentiated QoS in fiber-wireless broadband access network

As one of the most promising technologies for next generation broadband access network, the fiber-wireless broadband access network (FiWi) integrates the technical merits of the high capacity of optical access network and the flexibility of the wireless access network. To meet the Quality of Service (QoS) for different end users in FiWi, a QoS mapping framework is designed to differentiate the data transmission mechanism of multi-classes services. Furthermore, in order to work toward the green communications, we propose a multiple class of service (CoS)-based optical network unit-mesh portal points (ONU-MPP) sleep control mechanism under this framework. The proposed ONU-MPP sleep period is set according to the bidirectional traffic condition monitored by optical line terminal (OLT) via green dynamic bandwidth allocation (GDBA). The simulation results show that the QoS mapping framework and the ONU-MPP sleep control mechanism based on the QoS mapping can effectively improve energy efficiency and ensure the network performance in terms of delay, loss rate and throughput for the FiWi network. (C) 2014 Elsevier GmbH. All rights reserved.