Survivable routing and regenerator placement in optical networks

Survivable impairment-aware traffic grooming in WDM rings

Impairment-aware path selection and regenerator placement in translucent optical networks

Physical impairments, such as noise and signal distortions, negatively affect the quality of information transfer in optical networks. The effect of physical impairments predominantly augments with distance and bit rate of the signal to the point that it becomes detrimental to the information transfer. To reverse the effect of physical...

Impairment-aware path selection and regenerator placement in translucent optical networks

Protecting against network infections: A game theoretic perspective

Security breaches and attacks are critical problems in today’s networking. A key-point is that the security of each host depends not only on the protection strategies it chooses to adopt but also on those chosen by other hosts in the network. The spread of Internet worms and viruses is only one example. This class of problems has two aspects....

On-line survivable routing in WDM networks

A comparison of exact and e-approximation algorithms for constrained routing

On-line Survivable Routing in WDM Networks

In WDM networks, survivable routing and wavelength assignment (SRWA) involves assigning link-disjoint primary and backup lightpaths. In the on-line SRWA problem, a sequence of requests arrive and each request is either accepted or rejected based only on the input sequence seen so far. For special networks, we establish on-line algorithms with...

Survivable Impairment-aware Traffic Grooming in WDM Rings

Wavelength Division Multiplexing (WDM) optical networks offer a large amount of bandwidth using multiple, but independent wavelength channels (or lightpaths), each operating at several Gb/s. Since the traffic between users is usually only a fraction of the capacity offered by a wavelength, several independent traffic streams can be groomed...