Energy-Efficient Traffic Grooming in Bandwidth Constrained IP over WDM Networks

• Bin Chen,
• Zijian Yang,
• Rongping Lin,
• Mingjun Dai,
• Xiaohui Lin,
• Gongchao Su,
• Hui Wang,

Vol. 12, No. 6, June 29, 2018
10.3837/tiis.2018.06.015, Download Paper (Free):

• IP over WDM network
• Traffic grooming
• Bi-objective
• power consumption

Abstract

Minimizing power consumption in bandwidth limited optical traffic grooming networks is presented as a two-objective optimization problem. Since the main objective is to route a connection, the network throughput is maximized first, and then the minimum power consumption solution is found for this maximized throughput. Both transparent IP over WDM (Tp-IPoWDM) and translucent IP over WDM (Tl-IPoWDM) network may be applied to examine such bi-objective algorithms. Simulations show that the bi-objective algorithms are more energy-efficient than the single objective algorithms where only the throughput is optimized. For a Tp-IPoWDM network, both link based ILP (LB-ILP) and path based ILP (PB-ILP) methods are formulated and solved. Simulation results show that PB-ILP can save more power than LB-ILP because PB-ILP has more path selections when lightpath lengths are limited. For a Tl-IPoWDM network, only PB-ILP is formulated and we show that the Tl-IPoWDM network consumes less energy than the Tp-IPoWDM network, especially under a sparse network topology. For both kinds of networks, it is shown that network energy efficiency can be improved by over-provisioning wavelengths, which gives the network more path choices.

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