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We propose a new scheme, called protected working lightpath envelope (PWLE), for dynamic provisioning of survivable services without requiring any wavelength conversion. PWLE is a path-oriented protection strategy based on lightpath-protecting rho-cycles. It partitions the total network capacity into a static protection layer and a working layer available for dynamic routing. To deal with the new...
Traffic grooming techniques are used to combine low-speed data streams onto high-speed lightpaths with the objective of minimizing the network cost, or maximizing the network throughput. In this paper, we first present an efficient integer linear program (ILP) formulation for traffic grooming on mesh WDM networks. Our formulation can be easily modified to implement different objective functions. Unlike...
Most earlier works in the area of wireless mesh network assume a single interface being equipped in each node. In this paper, we consider the next-generation wireless mesh networks in which each node may be equipped with multiple radio interfaces, each capable of running in one of several modes, one of several channels, and each capable of supporting multiple modulations. For example, from off-the-shelf...
In this paper, novel routing tree construction algorithms for emerging multi-channel WiMax networks are presented. Both centralized and distributed schemes are explored. Simulation results show the improvement achieved compared to similar networks with a mesh topology.
Wireless mesh networks (WMNs) have emerged as a key technology for the next-generation wireless networking. Due to infrequent topology change and unreliable wireless links, a fundamental problem arisen is how to form an optimal topology to meet the traffic requirement. In this paper, we propose a joint optimization design on topology formation and traffic routing, which is formulated as a linear binary...
Dynamic admission control is a very important mechanism that aims, not only to check resources availability, but also to verify QoS constraints satisfaction. In this paper, we propose a new admission control mechanism in MPLS-based packet-switched networks. This admission control mechanism satisfies delay constraints for all the network connections. The admission control mechanism is based on solving...
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