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Differentiated resilience services support in heterogeneous IP over wavelength division multiplexing networks

Differentiated resilience services support in heterogeneous IP over wavelength division multiplexing networks

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The authors develop an integrated scheme that supports differentiated resilience services (DiffResServ) for dynamic provisioning in heterogeneous IP-over- wavelength division multiplexing (WDM) networks. By integrated, the authors mean that the provisioning mechanism takes into account network topology, resource and resilience information in both the IP and WDM layers. By dynamic, the authors mean that the establishment process of connections and lightpaths is based on the fact that the arrivals and departures of IP traffic connections are not known in advance. By heterogenous, the authors mean that the state routing algorithms function on the fact that optical nodes in WDM network may support different switching capabilities. This has been achieved through our proposed scheme which operates based on a dual link metrics (bandwidth,delay)routing algorithm inter-operating with efficient connections and lightpaths rerouting algorithms. A genetic algorithm is introduced to operate based on the solution space generated by this scheme in order to minimise the total cost of network operation. The authors have conducted simulations, where the results show that this scheme enables IP-over-WDM networks to guarantee the quality-of-service and resilience required for heterogenous traffic classes with effective and efficient allocation of network resources.

Inspec keywords: telecommunication network routing; telecommunication network topology; IP networks; quality of service; optical fibre networks; genetic algorithms; wavelength division multiplexing; DiffServ networks; telecommunication network reliability

Other keywords: network topology; heterogenous traffic; DiffResServ; wavelength division multiplexing network; resilience information; routing algorithm; resource information; heterogeneous IP network; differentiated resilience services support; genetic algorithm; quality of service; dynamic provisioning; dual link metrics

Subjects: Optimisation techniques; Computer networks and techniques; Optical fibre networks; Optimisation techniques; Communication network design, planning and routing; Computer communications; Multiplexing and switching in optical communication

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