Network virtualization over WDM and flexible-grid optical networks

Benefits of Programmability in 5G Transport Networks

“…Cloud IP Number of RRUs per node ~ Uniform (5,15) link capacity for DC-DC connection (Day) ~ Uniform(50,100) Gbps link capacity for ISP-ISP connection (Day) ~ Uniform(1200,1500) Gbps Fronthaul (RRUs-BBU) link capacity (Day) = 10 Gbps Backhaul (BBU-EPC) link capacity (Day) = 10% of fronthaul Night traffic variation factor = 25 [7] Night traffic variation factor = 1/8 [7] Night traffic variation factor = 1/8 [6] Figure 4(a) shows that dynamic slicing reduces the VN rejection probability by more than one order of magnitude when the network is in medium to high load condition (i.e., rejection probability < 0.1). This gain in the VN rejection performance comes at a cost in terms of VN degradation.…”

Network Virtualization Over Elastic Optical Networks With Different Protection Schemes

“…The authors in [1]- [6] studied the mapping problem in optical networks, taking into consideration some optical layer constraints, such as the transmission reach constraint and the spectral continuity/conflict constraints. Some results experiments can be seen in [16] and [17].…”

“…Driven by user behaviours, these new requirements are difficult to be accommodated with the existing, rigid telecommunication operation models. Through network virtualization, we are able to allocate isolated instances from a given resource to different users or applications and manipulate them logically, before inferring changes to the real resource [4]- [6].…”

A tutorial on the flexible optical networking paradigm: State of the art, trends, and research challenges

“…For instance, in [27], savings in the required IP router port count and spectral usage are shown by introducing multiflow optical transponders. Therefore, multilayer network planning techniques are currently in development, taking into consideration the additional degrees of flexibility offered by emerging flexible optical networking capabilities, with special attention given to techniques that try to fully exploit the enhanced functionalities of sliceable flexible transceivers [28], [29].…”