Design Green Hybrid Fiber-Coaxial Networks: A Traffic-Aware and Cooperative Approach
The authors propose a traffic-aware and cooperative approach to achieve energy-saving in Hybrid Fiber-Coaxial (HFC) networks that support DOCSIS 3.0 standard. The approach incorporates a two-step operation that consists of two algorithms, one for the Cable Modem (CM) side and the other for the Cable Modem Termination System (CMTS) side. To avoid transition overheads, they design both algorithms with the consideration of energy-to-NoC (Number of Changes) tradeoff and try to minimize the number of Dynamic Bonding Change (DBC) operations while saving the energy. Simulations verify the effectiveness of the algorithms by using a realistic HFC network traffic model, and the results demonstrate significant saving on the ON-time (energy consumption) of the CMs' channels and the CMTS' ports.