Towards energy efficiency in virtual topology design of elastic optical networks

Abstract

Elastic optical networks offer a reliable platform for achieving energy efficiency by supporting extensive optical grooming of variable-rate data traffic along with the traditional electrical data aggregation methods. The procedure of routing and spectrum allocation in a topology of nodes has explicit effect to the amount of consumed power. A new energy-efficient method for designing the virtual topology in IP-over-elastic networks is introduced and evaluated. It is concluded that it consumes less power under different elastic transponder types, it designs the virtual topology using fewer transponders, and finally, there is a slight increase in the number of end-to-end lightpath hops. The proposed method is characterized by high performance and low lightpath establishment complexity. Therefore, it is suitable for a broad range of network configurations and transponder types.

RDMSR: A reactive defragmentation with minimum spectrum route strategy for mixed grid optical network

“…At present generation, Internet of Things (IoT), wireless sensor network (WSN), mobile network, health care services, online streaming, and so on have increased the data consumption in many folds. [1][2][3][4][5][6][7][8] The immense growth of data demand drives the network service providers for gradually upgrading the network from traditional fixed grid wavelength division multiplexing (WDM) network to flexible elastic optical network. This co-existed fixed and flexible nodes network is known as mixed-grid optical network.…”

“…On contrary, in elastic node architecture, bandwidth variable transponder has flexibility to assign sub and super channel as per the bandwidth demand by user. [4][5][6][7][8][9] Due to spectrum continuity and contiguity constraints, bandwidth assignment on the links of the route is a major challenge, and it becomes more complicated if the route of connection request consists of fixed and flexible nodes. Fixed node allocates single or integer multiple of the wavelength of larger bandwidth slot which results spectrum redundancy.…”

“…In WDM node architecture, traditional transceivers in nodes transmit signal using rigid wavelength division multiplexing technique. On contrary, in elastic node architecture, bandwidth variable transponder has flexibility to assign sub and super channel as per the bandwidth demand by user 4–9 …”

Intelligent protocols for access and backbone networks

“…In the work [7] under the title "Towards energy efficiency in VT design of elastic optical networks", optical grooming is combined with the electrical one, while designing the energy-efficient VT of the backbone network. Also, the distance of light connections is considered by utilising various modulation formats, for achieving efficient spectrum utilisation.…”

“…The purpose of this heuristic [7] that is designed for the elastic platform is to exploit the optical and electrical grooming procedures for saving energy. Also, to use path evaluation with energy consumption characteristics, typical implementation complexity and low CapEx by reducing the number of required physical network components.…”