A modified traffic grooming algorithm with high trade-off efficiency for optical network

As the energy consumption of network has become an increasingly important issue, traffic grooming on Internet protocol over wavelength division multiplexing (IP-WDM) networks has been widely used for energy-efficient optical network. Traffic grooming can reduce the number of installed light paths and corresponding IP router line cards at the cost of traffic processing overhead. However, traditional traffic grooming algorithm prefers longer paths, which are responsible for longer transmission hop distance. Although there are studies that focus on reducing hop distance, the energy consumption increases accordingly. In this way, the trade-off between energy consumption and hop distance is a problem worth discussing. This paper proposes a modified heuristic traffic grooming algorithm which can improve the trade-off efficiency by about 20%, compared with the earlier algorithms.