We consider a generalization of the connected facility location problem where the clients must be connected to the open facilities via shared capacitated (tree) networks instead of independent shortest paths. This problem arises in the planning of fiber optic telecommunication access networks, for example. Given a set of clients with positive demands, a set of potential facilities with opening ...

The development of two new classes of commercial underwater robotic vehicles – deep diving work-class remotely operated vehicles and survey-class autonomous vehicles – is being driven by the needs of deep water oil production and deep ocean telecommunication cable operations. This paper presents a survey of the present state and future directions of commercial underwater robotics, examines prin...

We analyze the impact of the ownership structure of cable television …rms on the incentives to upgrade the cable networks to o¤er telecommunication services. First, we show that dual ownership of a local telephone network and a cable network, compared with separate ownership, may increase or decrease incentives to invest in upgrading the cable television network. Coordination economies bene…t d...

Seismic observation and subsurface imaging are of key importance in mitigating the seismic hazards exploiting spaces urban areas. However, is, to some extent, hindered by more populations facilities To develop new methods for observation, we carried out several field experiments Binchuan city, Yunnan Province. In experiments, applied distributed acoustic sensing (DAS) technique an...

Residential broadband options such as cable and digital subscriber lines are growing in popularity. However, evidence suggests that urban areas are receiving the majority of infrastructure investment, thereby leaving many rural locations with few options for broadband access. With access to telecommunication infrastructure becoming an increasingly important component to local economic developme...

We consider the stochastic subscriber line model as a spatial stochastic model for telecommunication networks and we are interested in the evaluation of the required capacities at different locations of the network in order to provide, in fine, an estimation of the cable system which has to be installed. In particular, we consider hierarchical telecommunication networks with higher–level compon...

The surveillance and inspection of underwater installations such as power and telecommunication cables are currently carried out by trained operators who, from the surface, guide a Remotely Operated Vehicle (ROV) with cameras mounted over it. This manual visual control is, however, a very tedious job that tends to fail if the operator looses concentration. This paper describes a tracking system...

The capacity of the global communications network is being progressively increased to handle the rapid growth in telecommunication traffic generated by the Internet. Fujitsu supplies submarine optical cable systems that can provide the huge capacity and short transmission delay required by carriers. There are two ways to increase capacity: construct a new submarine cable system or upgrade the e...

In the design of wire-based networks, the implementation of infrastructure is a major cost component. One way to obtain cost savings is to coordinate trenching activities of different network operators, e.g., telecommunication providers may join forces with local communities when digging roads or pavements. In this work, the Multi-Commodity Cable Trench Problem (MC-CTP) is introduced that aims ...