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This paper proposes a new survivable algorithm named sub-path protection based on auxiliary virtual topology (SPAVT) to tolerate the single-link failure in WDM optical networks. According to the protection-switching time constraint, SPAVT constructs the virtual topology. Then, it only needs to run one time of routing algorithm to find the feasible virtual route in virtual topology. Simulation results...
In this paper, we propose a new algorithm, enhanced differentiated services protection (EDSP), to satisfy the multiple services grades under multi-link failures in WDM optical networks. We consider three services grades, i.e., diamond grade, golden grade and economy grade. For demand with economy grade, EDSP only computes a primary path and does not consider protection. For demand with Golden grade,...
This paper proposes a new survivable algorithm, enhanced shared-path protection (ESPP), to tolerate multi-link failures in WDM optical networks. In ESPP, we consider the load balancing to reduce the blocking probability, use resources sharing to save backup resources, and perform recovery escalation to carry the affected traffic. Compared with the conventional algorithm, ESPP has better resource utilization...
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