Strictly evolutionary approaches to improving the air transport system – a highly complex network of interacting systems – no longer suffice in the face of demand that is projected to double or triple in the near future. Thus evolutionary approaches should be augmented with active design methods. The ability to actively design, optimize and control a system presupposes the existence of predicti...

This paper provides an overview of how to schedule and optimize traffic lights using Intelligent Transport Systems. In this work we present the scheduling and optimization algorithms that we developed and how we tested them by connecting different simulators to evaluate their efficiency. The developed algorithms have been tested on a T-Junction. The road network is simulated using MObility mode...

Our proposed Bandwidth Optimization Control Protocol allows a mobile node to send request and get reply using two different networks simultaneously. Connection supply for mobile nodes is not done by modifying transport layer protocols, but by handling the update of routing table at the Internet layer using bandwidth optimization control protocol messages, options, and processes that ensure the ...

In this paper, we address optimal network coding schemes for two-user unicast networks. Using previous results on the relationship between graph structure and informationtheoretic capacity, we characterize the capacity region for a class of two-user unicast networks by finding a combination network coding/routing scheme to achieve an outer bound on capacity. This scheme has the remarkable prope...

Traditional reliable transport protocols have been designed to perform end-to-end delivery transparently to the intermediate nodes along the path (e.g., TCP). The resourceconstrained nature of a Wireless Sensor Network (WSN) requires a new paradigm where intermediate nodes are able to cache packets and retransmit them on-demand during packet loss recovery in order to avoid incurring costly end-...

Existing networks with transport protocols such as TCP and UDP have limitations when fitting into new technologies, like increased heterogeneity and mobility. In order to solve this problem, our attempt is to design a self-adaptive transport protocol, which can fit into the network condition dynamically according to the parameters given by upper layer and the network layer in (wired/wireless) N...

We present a solution algorithm for problems from steady-state gas transport optimization. Due to nonlinear and nonconvex physics and engineering models as well as discrete controllability of active network devices, these problems lead to hard nonconvex mixed-integer nonlinear optimization models. The proposed method is based on mixed-integer linear techniques using piecewise linear relaxations...

Discrete, nonlinear and PDE constrained optimization are mostly considered as different fields of mathematical research. Nevertheless many real-life problems are most naturally modeled as PDE constrained mixed integer nonlinear programs. For example, nonlinear network flow problems where the flow dynamics are governed by a transport equation are of this type. We present four different applicati...

the congestion pricing has been discussed as a practical tool for traffic management on urban transport networks. the traffic congestion is defined as an external diseconomy on the network in transport economics. it has been proposed that the congestion pricing would be used to reduce the traffic on the network. this paper investigates the cordon-based second-best congestion-pricing problems on...