The traffic grooming technique provides a two-layer traffic engineering capability by aggregating and routing up-layer low-bandwidth traffic flows over low-layer re-configurable routed high-bandwidth connections. In this paper, we optimize traffic grooming for static traffic in mesh Wavelength Division Multiplexing (WDM) networks with wavelength converters. The optimization objective is to maxi...

In the two preceding papers, we established the so-called J-system as the dynamic system of the traffic assignment problem for static case and developed corresponding numerical solution methods. In this paper, we present J-system formulation of the dynamic traffic assignment problem. Here we first extend the definition of J-functions of First-In-First-Out violation for a dynamic traffic network...

User equilibrium is a central concept for studying transportation networks, and one can view it as the result of a dynamical process of drivers’ route choice behavior. In this paper, based on a definition of O-D First-In-First-Out violation, we propose a new dynamical system model of the route choice behavior at the aggregate, route level for both static and dynamic transportation networks. An ...

Integrating land use, travel demand, and traffic models represents a gold standard for regional planning, but is rarely achieved in a meaningful way, especially at the scale of disaggregate data. In this report, we present a new pipeline architecture for integrated modeling of urban land use, travel demand, and traffic assignment. Our land use model, UrbanSim, is an open-source microsimulation ...

In this paper we consider the routing and wavelength assignment problem as well as the placement of wavelength converters in a wavelength routed all-optical network. Using a clustering technique called BI (Blocking Island), we propose a simple and intelligent RWA (Routing and Wavelength Assignment) algorithm: BI_RWA and a converter placement algorithm. These algorithms can be used in arbitraril...

NANOCOFC consortium supported by EC FP6 NMP (SSA) program has taken a historical opportunity to develop innovative fuel cell network / networking efforts covering materials, technologies, devices/system and applications with emphases on both science and commercialization. The consortium involves 7 European countries crossover Europe, 1 United Nation centre and 4 Chinese partners including Chine...

This paper researches the routing and wavelength assignment (RWA) problem in wavelength routed optical WDM networks with the wavelength conversion capability at different network nodes. We studied the static case in which all connection requests are known in advance, thus a routing decision can be made based on the complete knowledge of the traffic to be served by the network. The Bee Colony Op...

Dynamic traffic assignment models have been attracting increasing attention with the progress of traffic management policies based on information technology. These dynamic estimation tools, however, just apply static route choice models either at only origin node or at every arrival node. This paper aims at providing some knowledge on drivers’ dynamic route choice behavior using probe-vehicle d...

Channel assignment in multi-channel multi-radio wireless mesh networks is a powerful management tool to exploit available resources efficiently. In this paper, we study the problem of dynamic channel assignment in the presence of traffic with QoS constraints to optimize network performance, which is measured in terms of demand acceptance rate. We propose an on-line on-demand dynamic algorithm f...