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We consider the problem of energy aware localized routing in ad hoc networks. In localized routing algorithms, each node forwards a message based on the position information about itself, its neighbors and the destination. The objective of energy aware routing algorithms is to minimize the total power for routing a message from source to destination or to maximize the total number of routing tasks that a node can perform before its battery power depletes. In this paper we extend our previous work on randomized localized routing algorithms that achieve high packet delivery rates and show that they have good overall power consumption. We present two different variants of energy aware randomized routing, namely "greedy" and "compass", and we study their performance using different cost metrics (e.g., forwarding power, remaining node energy, or a combination of both). We study their performance experimentally on different topologies and compare it with other existing algorithms. Our simulation results show that energy aware randomized algorithms achieve superior packet delivery rates and moderate energy consumption.

This paper presents a distributed control scheme that enables the destination node in a WDM routed network to make adaptively both routing and wavelength selection decisions.

This paper presents a novel hybrid distributed fault-management protocol for combating single-fiber failures in mesh-based DWDM optical networks. The proposed hybrid approach combines Link State Protocol to disseminate and update information only about the physical connectivity of the network and a distributed local information-based signaling algorithm for connection management. The purpose of using a hybrid approach is two advantages: (1) reducing the signaling overhead associated with the global information-based link state protocol by using a distributed approach where only local information is maintained at each node; and (2) eases the implementation of the routing protocol where physical constraints, such as link/node diversity, are imposed. The performance of the proposed hybrid approach is evaluated via comparing the dedicated-path protection and the shared-path protection schemes in terms of blocking probability, restoration time under failure assumption, and data loss incurred during the recovery phase.