China
Africa
Explore chapters and articles related to this topic
Survivability of Optical Networks
Published in Partha Pratim Sahu, Advances in Optical Networks and Components, 2020
Our proposed approaches are used to reduce the number of wavelengths needed to accommodate the maximum number of connection requests. It has three phases: working path selection, traffic grooming in working paths, and restricted shared backup paths [10] for protection of connections. The working paths of the SD pairs are developed using K-shortest-path approach. As discussed in Section 6.7, here, we have used both dedicated wavelength grooming (DWG) and shared wavelength grooming (SWG) together. For traffic grooming, we have proposed two types of approaches: destination shared wavelength grooming (DES_SWG) and source shared wavelength grooming (SOURCE_SWG) [42]. In case of DES_SWG, the connections of same destination and different sources are groomed along a routing path, whereas for SOURCE_SWG, the connections of same source and different destinations are groomed along a routing path. As for an example shown in Figure 7.14a, traffic grooming of SOURCE_SWG is made between the connections of 1-2 and 1-6 pairs on the same path <1-2-6> as indicted by the dashed line. The backup paths are formed for survivability of traffic grooming network. In SOURCE_SWG, the backup paths for 1-2 and 1-6 are <1-3-2> and<1-3-5-6>, respectively, which are indicated by the solid line in Figure 7.14a.
Traffic Grooming in PCE-based Architecture Combined with RWA Utilizing Dynamic Fiber State Information
Published in IETE Technical Review, 2018
Optical networks employing pure optical regeneration provide high data rates/speeds in the backbone network [1]. Wavelength division multiplexing (WDM) technique employed with optical amplifiers could multiplex a high number of wavelengths (or communication channels) on a single strand of fiber. Coarse/dense wavelength division multiplexing (C/D WDM) technology is driving backbone pure optical networks of the future, and providing these networks with data rates in the range of thousands of Gb/s in a single strand of fiber. Due to exponential increase of telecommunication, cellular, and internet user base around the world [2], this bandwidth will soon seem meager in comparison to backbone data rate requirements of the future. Traffic grooming is a process of combining various flows of data into a single channel thus optimizing existing bandwidth. Furthermore, traffic grooming can prioritize the flow of data as per various classes of service (CoS). Hence, an efficient traffic grooming algorithm (TGA) needs to be formulated to enhance the bandwidth utilization of these future telecommunication networks.