Power Aware Routing And Wavelength Asssignment In Transparent Optical Netwroks

With the boom of the Internet and the rapid growth of network users and variety of services, the energy consumption caused by Information and Communication technology is increasing rapidly, leading to a larger and larger proportion of total global energy consumption year after year. Therefore, how to reduce network energy consumption and build a more energy-efficient network has become a hot topic in related research fields.The development of WDM technology and maturity of optical device technology make fiber communication system the mainstream of core network, and the bandwidth demand and diversity of current services encourages the core network to be more transparent, more intelligent and more energy efficient. Thus, the research on power aware transparent optical networks is of great importance.In this paper, we investigate the architecture of power aware transparent optical network. In the transport plane, a novel. OXC node capable of dynamic power management is studied, and two types of power-aware control mechanisms based on GMPLS and OpenFlow respectively are proposed, finally in the management plane, a power aware network management system is designed and implemented.In optical networks, the power aware RWA algorithm (PA-RWA) is critically important to network power efficiency. Due to the difference of application scenarios, PA-RWA has different optimization objections compared to traditional RWAs. The paper proposes two PA-RWA algorithms, namely power increment cost algorithm enhanced with wavelength conversion (PIC-WC) and load based cost algorithm enhanced with wavelength conversion (LBC-WC). Simulation results show that the proposed PA-RWA algorithms can improve the power performance effectively. In addition, LBC-WC, which concentrates traffic in fibers based on load, has better performance than PIC-WC.