The technology needed to generate
and transmit more than 1,000 high-quality WDM channels with fixed wavelength spacing
is already available. Furthermore, the Waveband Switching (i.e., switching multiple wavelengths
as a single entity) is being researched. Therefore, the future OBS would be based on
waveband-selective switching or other more advanced switching technologies. In the rest
of the chapter, an attempt to streamline the OBS networks that are using burst segmentation
techniques is presented.
Staged.Reservation.SCHEME.(SRS).
The Staged Reservation Scheme (SRS) (Abid, Abbou, & Ewe, 2005) is introduced to streamline
previous reservation protocols that are based on burst segmentation strategy, to increase
the throughput of the core nodes, and to overcome some of the limitations associated with
the burst segmentation concept (shown earlier). In SRS the data burst is divided into equal
Data Segments (DSs). This is an indication to where the DB might be partitioned, while
traveling in the optical-domain. The DSs have the same attributes and characteristics as any
DB (i.e., each segment may range from one to several packets, and its length is reflected
in the BCP). The control packets format was designed to be scalable to high transmission
speeds, and to reflect the DSs??™ length in addition to the DBs??™ length.
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