We consider the problem of broadcasting independent sources in a dense
wireless network. We propose a fully decentralized scheme with minimal
overhead that uses physical layer cooperative transmission with decode
and forward relaying. We characterize the propagation of the source flows
across the network and show that in the limit of an infinitely dense
network, the relaying proceeds in {\it levels}. We verify our results
numerically and explore the delay-reliability tradeoff and the performance
in terms of the per node outage probability through simulations.
Stop-and-go traffic patterns are common annoyances for
freeway motorists. While possible explanations for
oscillatory traffic flow patterns include individual
driver behavior, overreactions, and lane-changing
maneuvers, there is currently no consensus as to the
cause of the stop-and-go waves. We choose to study the
topology of a freeway network as a mechanism for
producing traffic oscillations. In this talk, we'll
consider a simple freeway network in which we have
merge and diverge junctions with constant demand. By
utilizing the network kinematic model of traffic flow,
we can discern under which conditions we will see
traffic oscillations appear, and whether these waves
are decaying or periodic.
Generation of stop-and-go traffic waves in a simple freeway network
Martha Shott, H.M. Zhang