Collaborative Sleep Mechanism between Cross-domain Nodes in FiWi Network Based on Load Balancing and QoS Awareness

摘要

Fiber-Wireless Broadband Access Network (FiWi) not only has the advantages of high bandwidth and low data loss in optical network, but also has the characteristics of mobility and flexibility in wireless network. However, a large number of active devices in the FiWi network cause high energy consumption. Aiming at saving energy of FiWi network, this paper studies the collaborative sleep mechanism between cross-domain nodes in FiWi network based on load balancing and QoS awareness. Firstly, the energy consumption model of FiWi network is established to describe the device startup/shutdown energy consumption and service forwarding energy consumption. Secondly, a service route planning method for FiWi network based on load balancing and priority is proposed. The method is implemented by dividing network regions and allocating end-to-end routes for services within the region. Finally, a collaborative region sleep mechanism between ONU and wireless nodes is proposed. At the same time, the routes are redistributed for the affected services according to the service priority to ensure the accelerated forwarding of high-priority services. The simulation results show that the proposed mechanism can reduce the energy consumption, ensure the load balancing of the network, and improve the transmission rate of high-priority services.