Joint traffic engineering optimization for QoS and best effort traffic

We consider traffic engineering (TE) in networks where quality of service (QoS)-guaranteed as well as best effort (BE) services are present. We propose a joint TE optimization technique for both QoS and BE traffic using multi-objective optimization framework. We show that joint TE optimization results in more efficient network resource usage compared to sequential TE methodology where TE decision (finding paths and traffic splitting among paths) is made for QoS-guaranteed traffic first by assigning appropriate network resources and then TE decision is made for BE traffic according to remaining network resources. Furthermore, we consider QoS traffic demand fluctuations and propose a joint TE problem formulation to address both QoS traffic demand fluctuations and efficient network resource usage for BE traffic.